ST500 MH for LT Motor

ST500M/H Series Intelligent Type Electric Motor Controller

Su Zhou Wan Long Group Co., Ltd.


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Table of Contents

■ General Description of the Products -----------------------------------------------------------1

■ Products Characters-------------------------------------------------------------------------------2

■ Products Classification---------------------------------------------------------------------------6

■ Products Design & Type Selection ------------------------------------------------------------10

■ Perfect Motor Protection Functions------------------------------------------------------------11

■ Various Kinds of Motor Control Modes-------------------------------------------------------21

■ Rich Monitoring Functions of Motor Operation---------------------------------------------24

■ Operation, Maintenance And Management Functions of Motor---------------------------25

■ Communication Functions-----------------------------------------------------------------------26

■ Terminals Allocation & Its Application--------------------------------------------------------27

■ Installation & Outline Diagram-----------------------------------------------------------------31

■ Typical Wiring Diagram-------------------------------------------------------------------------34

■ Products Technical Parameters------------------------------------------------------------------38

■ ST500M/H Series Intelligent Type Motor Controller Ordering Specification Table----42

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General Descriptions of the Products

For more than 5 years in electric power, petrifaction, light industry, coal industry, paper industry, steel and other industries, more than 100 thousand ST500 intelligence type electric motor controllers have been put into AC motor protection and control operation, which have accumulated a great deal of practical experience in engineering. On this basis, the ST500M/H Series intelligence type AC motor controller, a new generation of enhanced high-performance with microprocessor technology have emerged as the time requires. Working with contactor, soft starter,plastic moulded case circuit-breaker, the production provides a complete set of special solution to the low voltage AC motor including control, protection, monitoring and bus communication, replacing thermal relay, thermal protector, leakage protector, under-voltage protector and other protectors, canceling time relay, auxiliary relay , CT , meter, control and selection switching, indicator lighting, programmable controller, transmitter and other added components, which make the product the ideal choice of intelligent MCC.

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Products Characters

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Protection function

Starting overtime /starting over-currentOver Load Inverse time ProtectionOver CurrentTE Time ProtectionUnder Current ProtectionCurrent unbalance ProtectionEarthing ProtectionDigital value process Interlocking ProtectionOver/Under Voltage ProtectionPhase Sequence Fault LockingUnder Power ProtectionAnalog Value process Interlocking ProtectionTemperature ProtectionLeakage Current Protection

Motor Operation & Controlling

Function

Direct Start-upReversible Start-upY- ∆ Start-up Reactor voltage reducing Start-up Autotransformer Start-up Soft Start-up Anti Fluctuanting ElectricityShort time power off self Start-upElectrifying device Self Start-up

Measuring function

Three Phase CurrentsThree Phase VoltagesPower , Power Factor, FrequencyEnergyThermal CapacityCurrent Unbalance RateLeakage Current ValueThermal Resistance4~20mA input

Maintenance&Manageme

ntFunction

Present Running TimePresent Stopping TimeAccumulated Running TimeAccumulated Stopping TimeStarting-up CurrentStarting-up TimeNumber of operating TimesInput & Output status8 Faults Record Fault Time RecordRunning Status Indication

Com. Function

ModbusDouble ModbusProfibus-DPDevice-NetIndusry Ether Net



Uses 16 bits high-performance industrial grade microprocessor special protocol chip,

ASIC, directly sampling three-phase AC currents, three-phase AC voltages, thermal

resistance, 4-20mA analog value, leakage current; computer Current Imbalance Rates,

earthing current.

Protection function: The product is provided with many kinds of protection function, only

needs a simple choice to realize the protection or on /off, alarm / trip;

Overload “time-current characteristic” meets the standard of GB/T14048.4 -2003, and

increases more tripping rank, to satisfy the heavy load starting requirements.

“The tE time protection” meets the hot over-load protection standard of GB3636.3-2000 for

the safety-enhanced explosion-proof motors.

“Temperature protection” monitors the situation of giving off heat of the motor directly,

meets the standard of GB/T14048.X -200X " Low-voltage switchgear and control device----

Control units for built-in thermal protection for rotating electrical machines ".

“Leakage current protection”: sampling through the special-purpose transformer, the

measurement sensitivity is higher, meeting the standard of GB/T14048.4 -2001 appendix B;

process control and interlocking protection: through the inputs of digital value and the

inputs 4-20mA analog value it can realize a part of the non-electrical control and

protection of process interlocking

The reasonable starting protection: monitoring the starting process automatically,

distinguishing the initial starting-up current and the fault current effectively, ensuring

that the protection function does not have the misoperation, at the same time, uses many

ways such as the starting overtime and the starting over-current protection to realize the

starting-up protection.

Resolve “the over-current blind area protection”, diagnosis the fault current size

automatically, monitor correctly the over-current fault appearing between the breaking

current of the contact device and the short circuit tripping current of plastic casing

circuit-breaker, and control the trip of plastic casing circuit-breaker, to make the

protection more reliable.

The PT broken line monitoring function, (may connect in the secondary contact of MCB),

distinguishing function of the PT broken line or under-voltage protection;

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“Fluctuanting electricity” function: Guarantees that the phenomenon of short-time

fluctuanting of the electricity dose not affect the continuity of production for technological

process.

Less Voltage /Lost Voltage Re-starting function: after the main circuit cutting out power

in short-time or supply the power switching over , it can realize the time sharing

sequential starting according to the preset parameters .

Measuring parameters are complete: including current, voltage, power and electrical

energy parameters. The Precision of Current and voltage may reach 0.5 grade.

The transmitter function is stronger: For the internal setting of the 4-20mA analog value

output.It may select many kinds of electric value (current, voltage, power or electrical

energy), and the scope is adjustable;

The control mode is complete : internal setting of the control modes of direct, reversible,

Y-∆, resistor and Autotransformer reducing voltage start, soft start and transducer

starting co-ordination, it only needs the simple choice to realize the different control

function logic transformation, their flexibility and the versatility are very strong;

It has the choice function of operation jurisdiction for“two positions” or “four positions”;

Testing function:It may perform testing operation before the Swicth is being closed

Remember the 8 faults relevant parameters and information: It can record the year, the

month, the day, the hour, the minute, and the second when 8 breakdowns occur , and the

relevant information and parameters .

The maintenance & management of the controller is convenient, it can display the

breakdown parameters, the alarming information, the condition indication, the motor

operating information, the contact device operation life etc, it is advantageous for the

fault analysis, the productive efficiency statistics and the reasonable choice for repairing ;

Integrative design, with the optimization design of protection, monitoring control, and

communication function,it may substitute the ampere meter, the current transformer, the

thermal relay, the leakage protection relay, the transmitting instrument, the push-button,

indicator light etc

The display and indication is intuitionist, it uses Chinese liquid-crystal display, directly

display and indicates each kind of parameter, information and condition;

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The multiway relay output function, 7 relays output, 3 control relays (R3 is

independent,can be used for tripping of plastic casing circuit-breaker), 4 signal relays, the

control relay’s contact may directly control AC380 contact device load, also may directly

control DC contact device load;

The multiway digital input function: 12 circuit of digital input with power supply, the

external power supply for ST500M is AC220V, for ST500H is DC220V/DC110V;

The standard communication interface, it may choose several protocols, and it may

choose double communication interfaces to realize redundancy of communication

interface;

The modular structure, the main body, the mutual inductor module, the display module,

the accessories combination etc. make it more convenient, more economical and more

rationalized;

The external dimensions is more reasonable, it may be installed in 1/4 drawers.

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MNS、GCK、GCS、GHK、GWL。。。



Product Classifications

Product composing

The ST500M/H series controller is composed of two parts :the main body and the special-

purpose current transformer module. The external dimensions of main body are unified, the

special-purpose mutual inductor has three kind of frame sizes:100A, 250A, 820A. The ST522B

display module, ZT30/100 special-purpose leakage CT, ST-9 power supply module etc.the TM

surge arrester etc. are Optional accessories.

ST500M/H Category Frame

current

Current Range Optional Accessories

100A 2A：0.5 A -2 A

5A：1 A -5 A

6.3A：1.6 A -6.3 A

25A：6.3A -25 A

100A：25A -100 A

ST522B display module

When connected with ST500M/H,it can

realize measuring display, control and

operation, also can see about information and

accomplish parameter setting

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250A 250A：63A-250A

820A 500A：125A-500A

820A：200A-820A

Product type

The product is divided into two kinds: ST500M, ST500H. Their main functions are shown in

the next table:

Classification Function description Applicable scope functions to be selected and matched

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ZT30/100.special leakage current transformer Available when leakage current protection function is selected The

current Range of ZT30 is 500mA （ 50-500 ） ;

Tate of is ZT100 1000mA（100-1000）.

ST-9 Power supply Module It is for ST500M，Only it is used for realizing

“Anti electricity fluctuantion” ， less voltage and lost voltage functions.It can maintain 9s power

TM surge arresterto improve the life span ti is connected to the two sides of contactor



ST500M Standard Protection

Measuring and controlling

Functions（Note ①）

AC controlling Relay

Output （Note⑤）

AC Auxiliary Power

supply（Note⑥）

AC Power supply

is AC

Voltage Function（Note ②）

Leakage current Protecting

Function（Note ③）

Temperature Protection function

tE time Protection function （ Note

④）

4-20mA Input Protection Function

4-20mA analog value Output

Com. Function（Note ⑦）

ST500H Standard Protection

Measuring and controlling

Functions

DC controlling Relay

Output（Note ⑤）

AC, DC Double circuit

Auxiliary Power

supply（Note ⑥）

Control Power

supply is DC

Note : The standard protection ① and Monitoring , And controling functions includes mainly:

Protection function:overload protection,under load protection, over-current protection(stalled), starting-up over-current protection(jammed), the starting acceleration overtime protection, current imbalance phase protection(lacking), earthing protection, external fault alarming, and external fault triping;

Monitoring content: three-phase current, three-phase current imbalance rates, the earth

current, the motor running status, fault information, the alarming information, thermal

capacity;

Note②: After selecting the“voltage function”, the protection function will be increased:with Under voltage protection, over voltage protection, under power protection, phase sequence fault locking function. Monitoring content will be increased: Three-phase voltage, frequency, power factor, active power, kilowatt-hour;Note③: The earthing protection function with the sum of internal three-phase current vectors

and the leakage electricity protection function which is realized by the additional special-

purpose leakage current transformer must be selected alternatively, when selects and matches

“the leakage protection function”, the earthing protection will be function automaticly

withdrawn.

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Note ④: It can be used in continuous running working, including easy to start-up or the starts not frequently start-up process, which it cannot appear obvious additional temperature rise, and which can be used in over load inverse protection motor with safety enhanced explosion.Note⑤: For the ST500H product its relay output uses 3 DC control relays (DC220V, 3A,

DC110V, 5A) + 4 signal relays (resistant AC250V, 3A), it is applicable in control the make-and-

break of DC220V/DC110V control circuit. For the ST500M, relay outputs: 3 AC control relays

(resistant type AC250V, 8A) + 4 signal relays (resistant type AC250V, 3A).

Note⑥: The ST500H product uses the double-circuit power supply: From Ua, Un to input the

AC220 auxiliary working power fromUa.Un And input the DC220V/DC110V auxiliary

working power supply from A1(+)A2(-).The ST500M product uses the input of AC220

auxiliary working power supply, from A1(+) and A2(-).

Note⑦: ST500M/H all may select and match the communication interfaces,to realize

communication functions of several protocols, the last digital of ST500 denotes the

communication mode: the ST502 indicating provided with the Profibus-DP interface, ST503

indicating provided with the MODBUS interface, ST504 indicating provided with the

DeviceNet interface, ST505 indicating provided with the double MODBUS interface, ST506

indicating provided with the industry Ethernet interface.

Product design &Type Selection

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6. 3A

5A

2A

250A

100A

500A

25A

1

2

5

4

6

3

ST □ M / H - □ - □ - □

820A



For example, “ST503MA-5A-VM2”,indicate Direct start-up mode motor controller, The

provided with control power supply and auxiliary working power supply all of AC220V, rated

current is 5A,and with has MODBUS communication interface, voltage function and analog

value Output.

The Installation manner is flexible

The product satisfies with the commonly used of installation GCS, GCK, GHK168, MNS, GZT etc. including 1/4 drawer set counters and various kinds of control box, the product is of modular structure, fixed manner and flexible.

Perfect motor protection function

The controller carries out the judgment and operation for each kind of operating

condition and the gathering of electric quantity data in the process of motor operation, and

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can realize the overload, under load, the starting-up over-current(stalled), the over-current

(jammed), current imbalance (lacks phase) protection, the earthing/Leakage, starting-up

overtime etc various kinds of reliable and precise protections, so as to guarantee the

production security and operating continuity.

Engineering data of the controller

function item contents

Mutual Inductor

Rated Value

In 2A，5A, 25A，100A，250A，500A，820A

Leakage

eletricity Mutual

Inductor Rated

Value

I∆nm 0.5A ,1A

Motor setting

Current Range

Ie 2A(0.5A-2A)，5A(1A-5A) ,25A(5A-25A)，100A(25A-

100A)，250A(50A-250A),500A(125A-

500A)，800A(200A-820A)Start-up overtime

protection

Start-up time 0.5-60s

Underload

protection

Setting value

range

20%Ie-100%Ie+OFF,OFF means the under load

protection is closed

Acting time 0.5s-50s

Executing mode Tripping/Alarming

Overload

protection

non-acting

characteristic

<1.05Ie no action in 2h

acting

characteristic

>1.2Ieload acting in 1h

Curve speed K 10 16 24 40 60 80 100 130 180 280 400 600

800 1000 1200 1300

Cold and hot

curve ratio

20%-100%

Cooling time 5 min-1080 min，step length 1 minpermitted start-up

thermal capacity

Way one/way two

Fault restoration

mode

automatic/man act

Start-up over-

current

protection

Setting value

range100％Ie-contact device allowable breaking current

＋OFF，continuous setting， OFF is the close of Starting-up over-current

protection

Acting time 0.5 s -50s

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over-current

protection mode

Tripping/ alarming

over-current

protection

Setting value

range100％Ie－contact device allowable breaking

current＋OFF，continuous setting，OFF is the close of over-current protection function

Acting time 0.5-50s

over-current

protection mode

Tripping, alarming

tE time protection tE tripping time

under the

multiples of

starting-up time

1-15s

Protection mode Stopping

current

imbalance

protection

Setting value

range(5％－60％)＋OFF，OFF is the close of imbalance protection

Acting time 0.5-50s

imbalance

protection mode

Tripping/ alarming

Earthing

protection

Setting value

range30% Ie～100% Ie +OFF ，OFF is the close of the function

delay time in start-up 0s～60.00s，step length 0.02sdelay time in running 0s～60.00s，step length 0.02scutting modulus C 1.5～6+OFF，step length 0.5executing mode tripping/alarming

leakage current

protection

Setting value

range

10% IΔnm～100% IΔnm +OFF，OFF is the close of the

function

delay time in start-up 0s～60.00s，0.02s step length

delay time in running 0s～60.00s，0.02s step lengthexecuting mode tripping/alarming

Under voltage

protection

Acting voltage （75％－95％）Ue+off OFF is the close of the under voltage function

Acting time 0.1S-60s，step length 0.1s

Acting mode Tripping/alarming

over voltage

protection

Acting voltage （105％－150％）Ue+off OFF is the close of the over voltage function

Acting time 0.1S-50s，step length 0.1sActing mode Tripping/alarming

Under power

protection(2)

Setting value

range（20%～95%）Pn+off

Acting time 1s～60s，step length 1sexecuting mode tripping/alarming

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temperature

protection(3)

executing mode tripping/alarming

Thermistor type Type Monitor/PT100/PTC/NTC

Acting resistance

setting value0.1kΩ～30kΩ(when PTC > return resistance setting value)

return resistance

setting value0.1kΩ～30kΩ(when NTC > Action resistance setting value)

Acting time Fixed on 1s

Phase sequence

locking

Acting value

setting

enable/disable

executing mode locking

External

faul（process

interlocking

protection）

Acting time 0.1s～60.0sexecuting mode tripping/alarming

analog value input

protection

Setting value

range

4-20mA

Acting time 0.1s～60.0sexecuting mode tripping/alarming

Contact device

separating

current

Setting value

range600%～1000% I e +OFF, off denotes not limited

Under

voltage/lost

voltage

restarting

function

Restarting

comeback voltage（75％－95％）Us＋OFF

Self restarting

function of

electrifying delay

time

Self restarting

time of

electrifying

0.1S-60s

Overload protection

Management of frequentlystarting-up motor

○ Indicate start-up command

● Indicate stop command

Note:in the special circumstancein order to make motor continuousrunning, it may first eliminate the thermal capacity of

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100%

0



the memory forcefully,andimmediately start-up the motor.

The hot memory function is of vital significance to the situation of needing to start-up the motor frequently. The controller simulates the thermal capacity of the motor under various kind of running status, and monitors the situation of motor giving off heat in real-time, protected the motor re-starting-up effectively under the superheat condition, which can both use the motor under the maximum limit, and guarantee the security of the motor, so that can guarantee the continuous operation of the motor. The chart shows the thermal capacity schematic diagram for the frequently starting-up operation, only when the thermal capacity cools belowthe “prohibition” line of the chart then the signal of being ready can be sent outfor starting-up, permit to start the motor oncemore.

"The prohibition" thermal capacity is divided into two kinds, one kind with solid thermal capacity decided as 15% (mode1); Another kind with thermal capacity of satisfying only one condition (mode) of the two kinds:(thermal capacity equaling to 100%- thermal capacity produced during last starting-up -2%) or 15%(mode2) .

For motor provided with the imbedded thermal resistance, it may select the controller provided with the hot protection function, which will monitor the motor’s real-time temperature to see whether it has already dropped under the limiting value which was allowed for restarting, if it is YES then the motor is allowed to be restarted, otherwise the motor cannot be restarted.

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Overload current-time characteristicsThe overload protection provides 16 kinds of inverse-time protection characteristic curve,

including 10A, 10, 20, 30 etc many kinds of tripping classes, which may be chosen and may realize the heavy load starting-up function. The user may choose their needing inverse-time protection tripping curve according to the actual engineering situation , the protection characteristic curves will be kept in EEPROM of the controller after the computing the analog value. The action value, the restoration mode, the permitted restart-up thermal capacity, the protection acting curve, the cooling time, the cold and hot curve ratio all may be completely adjusted through the protection setting.

K coefficient

tripping class

satisfying the

stipulation of

standard

Modulate

d

current

multiples

1.0 1.2 1.5 7.2

130, 180 10A

Tripping

time

not

acting in

2h

acting in

1h

≤2min 2s<Tp≤10s

280 10 ≤4min 4s<Tp≤10s

400, 600 20 ≤8min 6s<Tp≤20s

800, 1000 30 ≤12min 9s<Tp≤30s

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Overload protection current-time characteristic table

K

I/ Ie

10 16 24 40 60 80 100 130 180 280 400 600 800 1000 1200 1300

1.2 13.93 22.30 33.44 55.74 83.61

111.4

8

139.3

5

181.1

5

250.8

3

390.1

8

557.4

0

836.1

0

1114.

8

1393.

5

1672.

2

1950.

9

1.3 9.92 15.87 23.81 39.68 59.53 79.37 99.21

128.9

7

178.5

8

277.7

9

396.8

4

595.2

6

793.6

8

992.1

0

1190.

5

1388.

9

1.4 7.68 12.29 18.44 30.74 46.10 61.47 76.84 99.89

138.3

1

215.1

5

307.3

6

461.0

4

614.7

2

768.4

0

922.0

9

1075.

8

1.5 6.22 9.96 14.93 24.89 37.34 49.78 62.23 80.90

112.0

1

174.2

4

248.9

1

373.3

7

497.8

2

622.2

8

746.7

3

871.1

9

2 2.95 4.72 7.07 11.79 17.69 23.58 29.48 38.32 53.06 82.53

117.9

0

176.8

6

235.8

1

294.7

6

353.7

1

412.6

7

2.5 1.77 2.83 4.24 7.07 10.61 14.15 17.68 22.99 31.83 49.51 70.73

106.0

9

141.4

5

176.8

2

212.1

8

247.5

5

3 1.19 1.90 2.85 4.76 7.13 9.51 11.89 15.45 21.40 33.29 47.55 71.33 95.10

118.8

8

142.6

6

166.4

3

3.5 0.86 1.37 2.06 3.43 5.14 6.86 8.57 11.14 15.43 24.00 34.29 51.43 68.58 85.72

102.8

7

120.0

1

4 0.65 1.04 1.56 2.59 3.89 5.19 6.49 8.43 11.67 18.16 25.94 38.92 51.89 64.86 77.83 90.80

4.5 0.51 0.81 1.22 2.03 3.05 4.07 5.08 6.61 9.15 14.24 20.34 30.50 40.67 50.84 61.01 71.18

5 0.41 0.66 0.98 1.64 2.46 3.28 4.09 5.32 7.37 11.47 16.38 24.57 32.76 40.95 49.14 57.33

5.5 0.34 0.54 0.81 1.35 2.02 2.70 3.37 4.38 6.07 9.44 13.48 20.22 26.96 33.70 40.44 47.18

6 0.28 0.45 0.68 1.13 1.69 2.26 2.82 3.67 5.08 7.90 11.29 16.94 22.58 28.23 33.88 39.52

6.5 0.24 0.38 0.58 0.96 1.44 1.92 2.40 3.12 4.32 6.72 9.60 14.40 19.20 24.00 28.80 33.60

7 0.21 0.33 0.50 0.83 1.24 1.65 2.07 2.68 3.72 5.78 8.26 12.39 16.52 20.65 24.78 28.91

7.2 0.20 0.31 0.47 0.78 1.17 1.56 1.95 2.54 3.51 5.46 7.80 11.70 15.61 19.51 23.41 27.31

7.5 0.18 0.29 0.43 0.72 1.08 1.44 1.80 2.34 3.23 5.03 7.18 10.78 14.37 17.96 21.55 25.15

8

0.1

6 0.25 0.38 0.63 0.95 1.26 1.58 2.05 2.84 4.41 6.31 9.46 12.61 15.77 18.92 22.07

The table is corresponding to different K coefficient, show us the action time under different

multiples of overload current, unit: S

Overload fault restoration After the tripping by overload fault, it there are two restoration modes

provided: automatic and manual, which is easy for users to choose. For“The automatic restoration” mode, after the motor is tripping by overload fault, and the thermal capacity drops to below the permission starting thermal capacity, motor can be reseted automatically , it can start again without needding the restoration operation; For“The manual reset” mode, after the motor is tripping

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by overload fault,and the thermal capacity drops to below the permission starting thermal capacity, the fault cannot be cleared automatically, which needs to be reset manually, otherwise it will not allow the motor to start.

Under load protection

When the transmission belt breaks or the water pump running without any load, the motor can appear the phenomenon of under load, which will bring the equipment damage.

It can be judged whether the load protection it shall be started or not according to the mean value of the motor’s three-phase currents.

The over current protection (jammed)

It can be judged whether the motor has over current fault or not according to the ratio of the biggest line current observed value and the motor rate current value. If the observed value of current

is bigger than the set value， then starts the over

current protection.

Contactor’s breaking ability protection

The permited breaking ability of the common contactor is 6~8 times of the rated current. If the contactor is operated when the circuit current is surpassing the scope, it will bring the damage to the contactor, and will cause the accident further spreaded. When short current fault occurs, controller will decide whether to separate the contactor or not by judging the fault current of the motor circuit whether it is bigger than the contactor’s greatest breaking current. If the fault current is smaller than the contactor’s greatest breaking current, the protection is carrying out by separating contactor. If the fault current is bigger than the contactor’s greatest breaking current, the controller will not separate the contactor, but separate the MCCB through a special relay output to cut off the motor circuit, thus it can realize a more reliable protection. (note: the MCCB shall be provided with the shunt release,)

Starting-up over-current (to stop running protection)

In the starting-up process, it can be judged whether to start the over current protection or not according to the ratio of the biggest line current observed value and the motor rate current . This function only works in the starting-up

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process, it will be locked automatically and changed in to running after the starting-up is ended .

Starting-up acceleration overtime protection

After reaching the starting-up acceleration time, controller will decide whether to start the starting-up acceleration overtime protection or not by the judging the current of the motor circuit whether it is dropped to 110%the rate current. In view of the safety-enhanced motor, the starting-up time is not to surpass 1.7 time of the tE time. The chart shows when the starting-up time is T1, because the current hasn’t fallen to below 110%Ir1, it is judged as the starting-up acceleration overtime, the controller will send out the protection signal. When the starting-up acceleration time is T2, it may enter into the normal operation.

110%I r1

0

800%I r1

600%I r1

T2T1

I r1:

tE time protection

It is suitable to be used protecting in two kinds of safety-enhanced motors: easy to started , not frequently started and cannot appear the obvious additional temperature rise. tE time protection has the inverse time characteristic. When the motor reaches the stable temperature under the highest ambient temperature, and the rotor-stalled current appears, the controller will trip and separate the power supply in time tE to assur the motor winding not surpassing the limiting temperature.

The current imbalance protection

Calculates the three-phase imbalance rates separately, according to three-

phase most imbalance rate and the set value of the imbalance protection, we can

compare and judge whether to start the imbalance protection or not. PhaseLack

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is the limiting condition of the imbalance. When in phase lack, the imbalance

rate is 100%, and the product will be in protection immediately. The imbalance

rate computing formula is |I-Iav|/Iav. Iav is the mean value of the three-phase

current. when Iav is smaller than the motor’s full load current, the denominator

may be indicated by Ie.

Earthing protection

The earthing protection has the characteristics of definite time-limit and

inverse time-limit protection, its current signal depends on the internal mutual

inductor current vector sum, it is used to protect the short circuit between the

phase line and the motor metal enclosure.

Earthing operation current

characteristics: If the theoretics value ≤

0.5Iq, don’t act; If ≥ 1.0Iq, time-lag act.

Earthing delay time characteristic: T =

Ie/I *C * Tq.

Among which: T---- fault delay time;

Ie --- motor rated current;

I--- earthing fault current;

C---- cutting coefficient

Tq----- setting delay time of earthing

protection.

When C is setting “OFF”, the

characteristic will be definite- time

delay.(start-up delay time)

When C is setting between

1.5 and 6 ,the earthing protection characteristic will be divided into two

kinds:①.I/Iq ≥C.the actuating characteristic is definite-time delay.②.

I/Iq <C. the actuating characteristic is inverse time delay.

The error of the time-delay of the earthing protection :action time-delay error is

2-17-2007 21/43



within ±10%; the Inherent error of action time is 40ms.

Leakage electricity protection

Whether to start the earthing protection or not is determined by the result of

comparing the vector sum secondary current of the three-phase transformer and

the setting value of earthing protection.

The leakage electricity protection needs a special-purpose leakage current

transformer. Whether to start-up the leakage electricity protection function is

determined by the result of comparing the residual current of sampling and the

setting value of leakage protection.

The monitoring current sensitivity is higher when using leakage electricity

protection of sampling mode (it should be selected alternatively, standard

allocation is earthing protection).

Leakage electricity protection characteristics:

When ≤ 0.5IΔn, it doesn’t act, when ≥ 1.0IΔn , it will acts time-delay.

The current-time characteristic is shown in the following table.

time Delay typeNon-delay

time type

2 time

limiting

non-

driving

time s

0.06 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 0

Residua

l

current

Large cutoff time s

IΔn 0.36 0.6 1.2 1.8 2.4 3 3.6 4.2 4.8 5.4 6 0.04

2IΔn 0.18 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3 0.04

5IΔn 0.07

20.12

0.2

40.36

0.4

80.6

0.7

2

0.8

40.96

1.0

8

1.

20.04

10IΔn

Temperature protection

The temperature protection is mainly realized by measuring the actual

temperature of the motor. It is through the change of PTC/NTC thermal value of

2-17-2007 22/43



resistance buried in the motor to reflect the temperature change. The controllers

implement the temperature protection to the motor through monitoring the

thermal resistance which is buried in advance in the motor. The protection is an

instantaneous protection.

External fault alarming

External fault alarming is mainly realized through the digital input

connected to the corresponding Alarm DI of the controller. When the controller

receives the DI input, it starts-up the alarming function.

External fault trip

External fault trip is mainly realized through the digital input connected to

the corresponding Trip DI of the controller. When the controller receives the DI

input, it starts-up the trip function by delay action.

Under voltage protection

When the main circuit voltage is lower than the setting value, it will start the

under voltage protection, the under voltage protection can simultaneously

monitor the three-phase voltage signal, and The PT breakdown,which makes the

protection function more reasonable.

Over voltage protection

When the main circuit voltage is higher than the setting value, it will start-

up the over voltage protection; over voltage protection may monitor the three

phase voltage signal simultaneously.

Under power protection

When the motor is running with low load, sometimes it may be due to the

power factor is lower, and the motor current may not be very small. The

controller may implement the protection through measuring the motor’s power

of the motor and make the motor protection more perfect.

2-17-2007 23/43



Phase sequence locking

When the controller detects the phase sequence fault of the motor, it will

lock the starting-up function, and protects the security of the motor equipment.

4-20mA analog value input protection

The external 4-20mA analog value is connected to the corresponding terminal of the controller; the controller decides whether to start this protection or not. by comparing the examined current value with the setting value. The function of the 4-20mA analog value input protection is mainly used in the interlocking protection of a part of non-electrical values etc.

Various kinds of motor control modes

Under the control of the program, the controller may realize various

different motor starting-up mode, and through the feedback of the contactor’s

auxiliary contact, it can monitor the running status of the contactor, in order to

guarantee the reliability of electric interlocking.

The various required control way of motor has been integrated in the

controller. For choosing of the control mode it needs to carry out the ST522B

display module only.

The control mode is optional: It may be the direct start-up, the reversible

start-up, the two speed start-up, the resistance voltage reducing star-upt, the Y/

△ start-up,the autotransformer Start, the soft starter control, or the transducer

control. Part of control modes may be divided into the open circuit/closed

circuit , two relays/three relays etc. (see the following table):

Start-up control mode open circuit Closed circuit Two relays Three relays

Y/△ start-up-up ★ ★ ★ ★

Autotransformer

Start-up★ ★ ★ ★

soft starter control ★ ★

the transducer control ★ ★

2-17-2007 24/43



“Anti-fluctuating electricity” function

After the voltage falling suddenly and the AC contactor is released, the

control contact of the controller does not open, when the power supply is

restored, the motor may go on running, does not need to carry on the starting-up

process. When ST500M is selected, it must select the ST-9 power supply module

simultaneously.

Self-restarting-up function

The controller has the self-restarting-up function after under voltage/lost

voltage. When it is in use, it will realize self-restarting-up. by different ways

according to the time length of the power supply cutting.

When the voltage restores before immediately restarting-up time, the

automatic restarting function will be carried out immediately, by using the

inertia of the motor running it, will continue to maintain the motor in the normal

operation.

When the voltage restores after immediately restarting-up time, but still

before the time-delay restarting-up setting time, the controller will make the

motor starting-up by grouping sequentially, according to the preset delay time.

so that it can prevent the monitor from creating the load to be overweight by

simultaneously starting-up.

When the voltage supply restores after time-delay restarting-up setting time,

the controller will not be able to carry out restarting-up function, if it is required

that the motor be operated,it needs the manual operation.

2-17-2007 25/43

T6

T6-T7T4-T5

T1-T2T3-T4

T1 T2 T3 T4 T5 T7



Auto restart-up

After the function is in use, in the process of electrifying the controller, the

controller will realize the time sharing restarting-up according to the system of

establishing after the power supply restoring.

If the “Auto restart-up” function is established as “permission”, and the

restarting mode is established as “restoration”, the controller will judge whether

the system will restart-up or not according to the condition before power cutting

off. If the motor is in running condition before power cutting off, controller will

automatically start-up the motor according to the delay time set when

electrifying. If the “Auto restart-up” function is established as “permission”, and

the restarting-up mode is established as “starting-up”, the controller will start-

up the motor automatically according to the delay time set when electrifying

directly. If the “Auto restart-up” function is established as “prohibition”, then

the function will be exited.

Motor control purview

ST500M/H operation control purview has two modes. mode one is the "two

positions", mode two is the "four positions"

The"two positions" control purview includes two kinds of controls: “local

control” and “remote control”, by the controlling of terminal "9DI" it can realize

the transformation of control purview, ST522B display module may also carry

out the purview choice. when theST522B display module’s operation purview is

"local control" (key may be locked); the DI’s purview is optional for"local" or

"remote"; the purview of communication interface is "remote control".

The"four positions" control purview includes: key-press operation of

control of ST522B display module, remote"automatic control" of DI terminal

(PLC, DCS etc), "local control” of DI terminal at site(control box at site),

2-17-2007 26/43



"remote control" of the communication interface. The terminal "9DI and 10DI"

shall be combined to realize "four positions" purview transformation. In the

following table "0" means that the digital input is not put through, "1" means

that it is put through. ST522B display module also may also carry out the

purview choice.

operation purview position

transformation condition of the DI input

terminal

9DI 10DI

ST522B display module 0 0

automatic control 0 1

local control 1 0

remote control 1 1

Rich Monitoring FunctionsFor Motor Operation

The controller provides the rich information for motor operation, including

many kinds of parameters and conditions, the monitoring data can be

transmited to PC for centralized management through the field bus, and also can

be directly displayed through the ST522B display module installed on the panel

of the switch cabinet. These information include electric parameter, running

status etc.

monitoring item for motor operation

Standard allocation

Standard allocation +voltage function

Standard allocation

+temperature function

Standard allocation +leakage electricity function

motor running status ★ ★ ★ ★

faulting information ★ ★ ★ ★

Alarming information ★ ★ ★ ★

Three-phase current ★ ★ ★ ★

Three-phase voltage ★

Power factor ★

Active power ★

kilowatt-hour ★

frequency ★

2-17-2007 27/43



leakage current ★

Earthing current ★ ★ ★

thermal resistance value ★

Current imbalance rate ★ ★ ★ ★

thermal capacity ★ ★ ★ ★

Operation Maintenance and Management Function of Motor

The scopes and precision degrees of various kinds of measuring parameter

item range precision Measure way

currentAccuracy degree 0.5 step

True virtual value measure120% Ie～800%Ie ±2.5%

leakage current 0.1I△nm～1I△nm ±2% True virtual value measure

voltage accuracy degree 0.5 step True virtual value measure

frequency 45Hz～65Hz ±0.05Hz

Power factor -1～1 ±1.5%

power 0～1100kW ±4.5%

kilowatt-hour 0～65535kWh ±4.5%

thermal

resistance

PT100/A type monitor

machine±5%

thermal capacity 0-100% ±5%

Current

imbalance rate0-200% ±5%

Analog value

out put4-20mA ±1%

Analog value in

put4-20mA ±0.1mA

The controller may provide the real-time condition information, the fault

analysis parameter, which will richen the motor routine maintenance

2-17-2007 28/43



management information it, is advantageous for understanding the motor

operation situation, the making of statistics of production efficiency, and

understanding the operation life of the contactor. It can assists the administrative

person to realize the more economical and reasonable maintenance management.

Management

information

Operation number of times

Tripping times

overall running time

overall stopping time

The latest running time

The latest stopping time

Alarming information

the parameter and information of

the latest 8 times of fault

fault time mark

type, parameters of faults

the residual action delay time

running/fault/alarming indications

monitoring of input/output status

Fault time mark function

In order to facilitate the fault analysis, the controller is provided with the clock

function, which may record the time after the fault occuring, and facilitated the

user's supervisory work enormously.

Communication Functions

The motor controller can realizes the data transmission and communication

with the PC management system through communication interface. Basic

parameters of different field buses are shown in the following table, the concrete

content of the communication transmission is shown in “the Communication

Protocol of ST500M/H Intelligent type motor Controller ".

item ST503 ST502 ST504 ST505

Communication

ProtocolModbus Profibus-DP DeviceNet Modbus

2-17-2007 29/43



Communication

speed

4.8/9.6/19.2/

38.4kbps0.5/1.5/3 /6 /12Mbps 125/250 /500kbps

4.8/9.6/19.2/38.

4kbps

Bus capability 255 127 64 255

Communication

interfaceRS 485 RS 485 CAN interface

RS

485，Double

net redundancy

Product Terminals

Allocation and

ItsApplication

Controller principle and

logical diagram

The controller can realize the intellectualized protection monitoring and

control function of the motor application through the collection of the three

phase AC current, the three phase AC voltage, the zero phase current, the

thermal resistance, the 4-20mA analog value, multiway switch digital value etc.

2-17-2007 30/43



carries out the operation, and processing by CPU after the process of signal

processing electric circuit, according to requirement of each kind of protection

characteristic, measuring data, control logic, data transmission etc, through the

indicating lamp, the display port, communication port, the control and the

protection output connection, the signal alarming output connection, the 4-20mA

analog quantity output etc many kinds of mode. The controller logic functional

block diagram is as follows:

2-17-2007 31/43



Controller Face Plate Terminals Allocation Scheme

Analog value input and output terminals

E1、E2 Leakage electricity signal input

AO+、AO- 4～20mA output

AI+、AI- 4～20mA input

R1、R2 Motor Buried thermal resistance input

L1、T1 A phase current signal input，L1 In，T1 out going line

L2、T2 B phase current signal input，L2 In，T2 out going line

L3、T3 C phase current signal input，L3 In，T3 out going line

Ua、Ub、Uc Three phase voltage signal inputController working power supply terminals allocation

ST500M:AC220V,inputs from A1(+)、A2(-)

ST500H:AC220V,inputs from Ua、Un;

DC auxiliary working power supply inputs from A1(+)、A2(-)Communication interface terminals allocation

2-17-2007 32/43

E2E1R2R1AO-AO+AI-AI+R2R1AI-AI+ AO-AO+ E2E1

B2A2SB1A1A2SB1 B2A1

21DI

1DIDICA2 -（）4DI3DI2DI

DI

7DI 6DI10DI9DI 8DI 5DI12DI11DI

Profibus-DP

A1 +（）

ST522B

Ua

AI AO

UnUc Ub PE6DO 7DO2COM4DO2DO3DO13DO2

DO

5DO1COM 1DO



A1、B1 RS485 Communication Interface 1，The function is the same as the nine holes D-type connector in the controller face plate (only Profibus-DP

equipped with D-type connector)

A2、B2 RS485 Communication Interface 2 S RS485 Communication shielding Line

Note:The position of 5 terminals of Device Net protocol is allocated according

to the stipulation of standard.

DI input terminals allocation DIC DI input common end

1DI A contactor state input （ normally

closed / level）2DI B contactor state input （ normally

closed / level）3DI breaker state input （ normally

closed / level）4DI remote control starting-up A

command input（normally opened / pulse）5DI remote control starting-up B

command input（normally opened / pulse）6DI remote control stopping command

input（normally opened / pulse）7DI remote control Reset signal input

push button（normally opened / pulse）8DI emergency stop push button

（normally opened / pulse）9DI Local / remote switching

input（normally opened / pulse）10DI Programmable input （ normally

opened）11DI Programmable input （normally opened） 12DI Programmable input （normally opened） Note : The pulse input time can not be less than

300mS. When start mode is Y/ △ start-up,

Autotransformer Start-up or soft starter-up

control,10DI is fixed contactor input state;

DO relay output terminals allocation1COM 1DO、2DO common ends 1DO start-up A output (normally opened)

2DO start-up B output (normally opened)

3DO1 、 3DO2 overflow fault output （ normally

2-17-2007 33/43

Programmable DO options are as follows:Ready for starting-up output Operation OutputStopping output Fault outputAlarming outputUnder load fault outputOverload fault outputStarting-up over-current fault outputOver-current fault outputtE fault outputEarthing/leakage fault outputtemperature fault outputImbalance fault outputStarting acceleration overtime outputUnder power fault outputOver voltage fault outputUnder voltage fault outputPhase sequence fault outputCommon DO outputRemote control purview signal output

Programmable DI options are as follows:Local control starting-up A command input (Pulse) Local control starting-up B command input (Pulse) Local control stopping command input (Pulse) Local control reset input push button (Pulse) Local control starting-up /stopA command input（level）Local control starting-up /stopB command input（level）Remote control starting-up /stopA command input（level）Remote control starting-up /stopB command input（level）Interlocking stopping A（Pulse）Interlocking stopping B（Pulse）Protection of digital process interlocking （Pulse）with "9DI" to realize "four positions " purview conversion （level）Common DI input（level）External fault alarming/ External fault tripping External fault trip



opened）2COM 4DO、5DO、6DO、7DO common ends

4DO fault signal（normally opened）5DO device fault （ normally closed ， and is opened in normal working

time） 6DO Programmable output（normally opened）7DO Programmable output（normally opened）Note1: Controller state input may be used to realize the “test” function with

the input of “circuit-breaker state”, if the circuit-breaker is not closed, the

protection will be automatically withdrawn;

Note2: When the short-circuit current exceeding the breaking current of the

contactor, the output of “overflow fault” relay may be used to shut off the

circuit-breaker;

Installation and Outline Diagram

ST500M/Hcontroller main body 100A Shell frame special-purpose transformer outline

dimensions（2A、5A、25A、100A）

250A Shell frame special-purpose transformer outline dimensions ZT40 Outside disposed transformer outline

dimensions

2-17-2007 34/43



note ： ST500M/H-250A product may be divided into independent main

body: and special transformer two independent parts, also may be grouped as a

complete installment: The main body is fixed on the special-purpose transformer

according to the diagram.

ST522 display module

2-17-2007 35/43



ST-9 power module

2-17-2007 36/43

Dimensions for Openings

ZT30 Leakage current transformerZT100 Special leakage current transformer

ST500M Typical application wiring principle

Diagram

ST500M direct-starting-up wiring connection principle diagram

ST500M-A SE1

M～

R1E2

R2AI+AI-

万龙电器

B2A2

ST522B

T2

L2

T3

L3

T1

L1

CJ1

4DI

7DI8DI9DI

5DI6DI

10DI11DI12DI

QF

CJ1

Ua

Uc

3DI

1DIDIC

2DI

Ub

L3L2L1

N

QF TM

A1(+)

AO+

A2(-)

AO-

B2A1

PE

2COM

7DO

4DO5DO6DO

2DO3DO1

1DO1COM

3DO2

CJ1

NL

PE

#N ST500M

#3 ST500M

QF

F

ST500M reversible-starting-up wiring principle diagram

QF

ST500M-B

万龙电器

M～

E2E1

R1R2

AI-AI+

A2S

B2

ST522

L3

T3

L1

T1

L2

T2

CJ2

CJ1

QFCJ2

CJ1

6DI5DI

9DI8DI7DI

4DI

12DI11DI10DI

UaUb

2DI

DIC1DI

3DI

Uc

L1L2L3N

QFF

AO+

2COM

6DO5DO4DO

7DO

AO-A1B2

A1(+)A2(-)

1COM1DO

3DO23DO12DO

PE

#N ST500M

#3 ST500M

CJ1 CJ2

NL

PE

TMTM

ST500H Typical application wiring principle

Diagram

ST500H direct-starting-up wiring principle diagram

ST500 -A SE1

M～

R1E2

R2AI+AI-

万龙电器

B2A2

ST522B

T2

L2

T3

L3

T1

L1

CJ1

4DI

7DI8DI9DI

5DI6DI

10DI11DI12DI

QF

CJ1

Ua

Uc

3DI

1DIDIC

2DI

Ub

L3L2L1

N

QF TM

A1(+)

AO+

A2(-)

AO-

B2A1

PE

2COM

7DO

4DO5DO6DO

2DO3DO1

1DO1COM

3DO2

CJ1

PE

#N ST500M

#3 ST500M

QF

F

ST500H reversible –starting-up wiring principle diagram

QF

ST500 -B

万龙电器

M～

E2E1

R1R2

AI-AI+

A2S

B2

ST522

L3

T3

L1

T1

L2

T2

CJ2

CJ1

QFCJ2

CJ1

6DI5DI

9DI8DI7DI

4DI

12DI11DI10DI

UaUb

2DI

DIC1DI

3DI

Uc

L1L2L3N

QFF

AO+

2COM

6DO5DO4DO

7DO

AO-A1B2

A1(+)A2(-)

1COM1DO

3DO23DO12DO

PE

#N ST500M

#3 ST500M

CJ1 CJ2

PE

TMTM

Products Technical Parameter

ProductS standard

GB/T 14048.1 Low Voltage Switch gear and Control Equipment General rulesGB/T 14048.4 Low Voltage Switch gear and Control Equipment Low-voltage electric mechanical type contacts and motor starters Electromechanical devices GB/T 14048.× Rotary electric machine built up thermal protection (PTC) Control UnitGB 3836.3-2000 Electrical Apparatus for Explosive Gas Environment Part 3： Safety-enhanced type:“e”JB /T××××-200× AC motor Protection deviceJB /T××××-200× Universal technology condition for digital AC motor protection & monitoring device Electrical parameters

Main circuit

Rate operating voltage（Ue） 400V/690V

Rated Insulation voltage （Ui） 690V

Controller Rated Current （In） 2A、5A、6.3A、25A、100A、250A、500A、820A

Rated operating frequency 50Hz

Insulation Resistance 100MΩ/500V

Insulation Test

Medium Strength Test

2kv(r.m.s.)，50Hz，1min

Impulse voltage test

5kv(Peak)，1.2/50uS，0.5J

3+，3-，Interval 5s

Auxiliary Power Supply

Rated Operating voltage （US） ST500M：AC220V、50Hz

ST500H：AC220V+ DC110V/220V

Power Consumption 15VA/15W

Operating environment

Ambient temperature -10℃ , 55℃

Storage temperature -25℃ , 70℃

Installation altitude 2000m

Installation category III

Degree of protection Body proper IP20,ST522B display module IP45

Control Relay Output

ST500M Control Relay output capacity

AC250V 8A（Resistant）

AC250V 5A（AC15）Maximum breaking voltage AC 400Vac

Maximum breaking capability 2000VA

ST500H Control Relay output

capacity AC250V 16A（Resistant）

AC250V，5A （AC15）

DC110V 5A （DC13）

DC220V 3A （DC13）Maximum breaking voltage AC 400Vac

Maximum breaking capability AC 4000VA

signal Relay output

Output capacity AC250V 3A（Resistance）

DC30V 3A（Resistance）Maximum breaking voltage 300Vac

Maximum breaking cut ability AC 1500VA

EMC

Immunity test for fast transient impulsing currents

Ⅲ for serious grade

Immunity magnetic field test for radiated high frequency

Magnetic field strength 10V/m.scanning velocity 1.5x10

ten times frequency/s

Immunity to electrostatic discharge Ⅲ degree

Immunity test for surge current shock waves

Power supply for Input and Output 2 kv，for Com. 1kv

Immunity test for operating frequency of

Magnetic Field

Class 4 for serious grade

Magnetic radiation test Radiation limiting value at a distance 10 m:40dB(µV/m)

Immunity test for Voltage instantaneous

Decreasing, Breaking, and Voltage

Changing

50 ms

-3

ST500M/H Series Intelligent Type Electric Motor Controller Ordering Specification TableOrder form number： User’s name： Contact Telephone：Requested delivery time： ordering date： Contact person：No. 1 2 3 4

specification and type number：ST501M/ST502M/ST503M/ST505MST501H/ST502H/ST503H/ST505H

Rated current：2A、5A、25A、100A、250A、500A、820A

Control

Mode(selecting one kind only)

Protection mode

Direct start-up Reversible start-up

Y-∆ starting-up Starting-up Reactor reducing voltage autotransformer Starting-up reducing voltagesoft starter starting-uptransducer starting-up

Additional function (reelection available)

Leakage electricity Protection Voltage Protection

Temperature Protection

Analog Value Input

Analog Value Output

quantity

Additional Electing Annex ：ST522B Display Module 、 ST-

9、ZT30/ZT100、TM

Other explainations

ST500 MH for LT Motor

Documents

ac motor protection

current protection soft

kinds of protection

current starting

time relay

load inverse time protection

management functions

low voltage ac motor