MHCO
General Characteristics
D.C. MEASURING CONVERTER
• Converter for D.C. Current and/or Voltage measurement.
• Direct connection to D.C. mains rating up to 4 kVcc.
• Fully isolated multi-voltage power suppy.
• Fiber optic connection between HV transducer and LV
reciving unit.
• Measurement channel fully diagnosed
The technical specifications reported are not binding and they
should be agreed in the related contract.
Transducers
The transducer MHCO provide a measurement of current or voltage fully isolated and safe.
The transducer includes three components: Transmitter, Riceiver, Fiber Optic.
Transmitter
The Transmitter, connected to the system, acquires the inputs and througth a fiber optic transmits it to the receiver.
The test voltage isolation between inputs and power supply is equal to 20kV 50Hz 1min.
Voltage Transmitter
MHCO-TV Converter for Voltage measurement direct connection to D.C. line up to 4000V
(voltage divider inside)
Current Transmitter
MHCO-TI Transmitter for measuring current, directly connected to the high voltage line through normal shunt .
Current/Voltage Transmitter
MHCO-TVI Transmitter current and voltage in a single unit directly connected to the high voltage line
(max 4000Vcc) through the shunt.
Riceiver
Current and Voltage Receiver
MHCO-RV
MHCO-RI
voltage measurements
current measurements
Fiber Optic
The optical fiber used for the connection between the transmitter and receiver (equipped with ST connectors) must have the following
characteristics: Plastic: 200u HCS - Glass: 62.5/125
The standard length of the optical fiber is 5 meters. (other lengths available on request).
The Receiver connected via optical fiber to the transmitter has three configurable linear analog outputs, - one relay output for alarm and
internal fault.
MHCO-RI
MHCO-RV
MHCO-TVI
M0
2N
G1
8-I
-Re
v.
2
Wiring Diagram - Standard version with external auxiliary power supply
MHCO-TV
Vaux
MHCO-RV
MHCO-TI
MHCO-RI
Vaux
MHCO-TVI
Vaux
V
I
OUTPUT 3
OUTPUT 2
OUTPUT 1
VauxEST.RESET
(OPTION)
ALARM
(OPTION)
DIAG.
OUTPUT 3
OUTPUT 2
OUTPUT 1
VauxEST.RESET
(OPTION)
ALARM
(OPTION)
DIAG.
MHCOTransducers
M0
2N
G1
8-I
-Re
v.
3
MHCOTransducers
Power supply voltage ( ) N.D.1
( ) (230)Vac 20%5 �( ) (33 70)Vdc2 �
( ) (85 160)Vdc3 �
( ) (110)Vac 20%4 �
Rated input voltage ( ) 200Vdc; ( ) 750Vdc; ( ) 1000Vdc; ( ) 1500Vdc; ( ) 3000Vdc; ( ) 4000Vdc.1 2 3 4 5 6
Input Impedance 20 M�
Outputs Fiber Optic free running serial output (type = 200.230.500 ST-ST)
Fiber Optic standard length 5m (max. 250m)
Measurement dynamic range 0 2Vn�
Measurement accuracy 0.1% Vn (-20 to +70)°C
Sampling frequency 32.2 kHz
Response time 0.5 msec. ( )compensated
Enclosure Material: BMCRF9 protection degree IP55
Connessioni A vite (M6) per ingressi di misura / ST per F.O. / Morsetti 2.5mm per Vaux2Connection terminals Bolt type terminals (M6) for inputs; ST for the F.O. ;
Power supply consumption �5 VA
Characteristics Voltage Transmitter MHCO-TVDirectly connected to the H.V. line via voltage dividerinternal
Screw type 2.5 mm for Power Supply2
Power supply voltage ( ) N.D.1
( ) (230)Vac 20%5 �( ) (33 70)Vdc2 �
( ) (85 160)Vdc3 �
( ) (110)Vac 20%4 �
Rated input current ( ) 60 mVdc; ( ) 80 mVdc; ( ) 100 mVdc; ( ) others on request.1 2 3 4
Outputs Fiber Optic free running serial output (type = 200.230.500 ST-ST)
Fiber Optic standard length 5m (max. 250m)
Measurement dynamic range ( ) ( )1 20 2 In; 0 10 In (x DIA / U-MLEs) - (1% 4)� � for auxiliary output
Measurement accuracy 0.1% In (-20 to +70)°C
Sampling frequency 32.2 kHz
Response time 0.5 msec. ( )compensated
Enclosure Material: BMCRF9 protection degree IP55
Connessioni A vite (M6) per ingressi di misura / ST per F.O. / Morsetti 2.5mm per Vaux2Connection terminals Bolt type terminals (M6) for inputs; ST for the F.O. ;
Power supply consumption �5 VA
Characteristics Current Transmitter MHCO-TIDirectly connected to the H.V. line across a normal measuring shunt
Diagnostic of Shunt's interruption Signalization via Fiber Optic
Screw type 2.5 mm for Power Supply2
M0
2N
G1
8-I
-Re
v.
Power supply consumption
Characteristics Voltage Receiver (MHCO-RV)
Power supply voltage
� 8VA
( ) N.D.1
( ) (230)Vac 20%5 �( ) (33 70)Vdc2 �
( ) (85 160)Vdc3 �
( ) (110)Vac 20%4 �
Measuring input Fiber Optic transmitter MHCO-TV
Outputs (configurable on request) 3 current loop outputs; Max. output power 0 7VA – 13 5V. .
Output accuracy 0.1% full scale (-20 to +70)°C
Response time < 0.5 msec.
Sampling frequency 32.2 kHz
Mesurement display 2 Led "ON" and "DIAG"
Diagnostic alarm relay Contact C/O. (Relay normally energized)
Deenergized for Internal Fault (Transmitter, Receiver, F.O. interruption, Power Supply failure)
Relay pick-up time < 200 msec.
Enclosure ABS protection degree IP42
Insulation 2500 V for 1 min. power supply / outputac
2500 V for 1 min. relay / outputac
Connection Terminals Bolt type terminals (2.5 mmq) - ST for Fiber Optic
Output 1 (terminals 1-2)
Standard output setting range
( ) 0 20 (30)mA 0 Vn (1.5Vn)1-1 � � �
( ) 4 20 (28)mA 0 Vn (1.5Vn)1-2 � � ��
( ) 0 10 (15)mA 0 Vn (1.5Vn)1-3 � � �
Output 2 (terminals 3-4) ( ) 0 20 (30)mA 0 Vn (1.5Vn)2-1 � � �
( ) 4 20 (28)mA 0 Vn (1.5Vn)2-2 � � ��
( ) 0 10 (15)mA 0 Vn (1.5Vn)2-3 � � �
Output 3 (terminals 5-6) ( ) 0 20 (30)mA 0 Vn (1.5Vn)3-1 � � �
( ) 4 20 (28)mA 0 Vn (1.5Vn)3-2 � � ��
( ) 0 10 (15)mA 0 Vn (1.5Vn)3-3 � � �
USCITA
OUTPUT1
USCITA
OUTPUT2
USCITA
OUTPUT3
USCITA DIAGNOSTICA
CHIUSO=FUNZ.NORMALE
APERTO=GUASTO
DIAGNOSTIC OUTPUT
CLOSE=NORMAL OPERATION
OPEN=FAULT
Alim. Aux.
Power Supply
Fiber Optic
Fibra Ottica
1
2
3
4
5
6
27
30
17
16
28
DIAG.
6
MHCOTransducers
( ) Other on request1-4
( ) Other on request2-4
( ) Other on request3-4
M0
2N
G1
8-I
-Re
v.
7
MHCOTransducers
Power supply consumption
Characteristics Current Receiver (MHCO-RI)
Power supply voltage
� 8VA
( ) N.D.1
( ) (230)Vac 20%5 �( ) (33 70)Vdc2 �
( ) (85 160)Vdc3 �
( ) (110)Vac 20%4 �
Measuring input Fiber Optic transmitter MHCO-TI
Outputs (configurable on request) 3 current loop outputs; Max. output power 0 7VA – 13 5V. .
Output accuracy 0.1% full scale (-20 to +70)°C
Response time < 0.5 msec.
Sampling frequency 32.2 kHz
Mesurement display 2 Led "ON" and "DIAG"
Diagnostic alarm relay Contact C/O. (Relay normally energized)
Deenergized for Internal Fault (Transmitter, Receiver, F.O. interruption, Power Supply failure)
Relay pick-up time < 200 msec.
Enclosure ABS protection degree IP42
Insulation 2500 V for 1 min. power supply / outputac
2500 V for 1 min. relay / outputac
Connection Terminals Bolt type terminals (2.5 mmq) - ST for Fiber Optic
Output 1 (terminals 1-2)
Standard output setting range
( ) 0 20 (40)mA 0 In (2 In)1-1 � � �
( ) 4 20 (36)mA 0 In (2 In)1-2 � � ��
( ) 0 10 (20)mA 0 In (2 In)1-3 � � �
( ) 0 15 (30)mA 0 In (2 In)1-4 � � �
Output 2 (terminals 3-4) ( ) 0 20 (40)mA 0 In (2 In)2-1 � � �
( ) 4 20 (36)mA 0 In (2 In)2-2 � � ��
( ) 0 15 (30)mA 0 In (2 In)2-4 � � �
( ) 0 10 (20)mA 0 In (2 In)2-3 � � �
Output 3 (terminals 5-6) ( ) 0 20 (40)mA 0 In (2 In)3-1 � � �
( ) 4 20 (36)mA 0 In (2 In)3-2 � � ��
( ) 0 10 (20)mA 0 In (2 In)3-3 � � �
( ) 0 15 (30)mA 0 In (2 In)3-4 � � �
Output 4 (terminals 7-8) Optional ( ) 4 20 mA -0.75In 1.5In4-1 � � ���
( ) 4 20 mA 0 1.25In4-2 � � ���
( ) 4 20 mA 0 1In4-3 � � ���
( ) 4 20 mA 0 1.33In4-4 � � ���
( ) 4 20 mA -0.75In 0.75In4-5 � � ���
( ) 4 20 mA -1In 1In4-6 � � ���
( ) 4 20 mA -2In 2In4-7 � � ���
( ) 4 20 mA -1.33In 1.5In4-8 � � ���
USCITA
OUTPUT1
USCITA
OUTPUT2
USCITA
OUTPUT3
USCITA DIAGNOSTICA
CHIUSO=FUNZ.NORMALE
APERTO=GUASTO
DIAGNOSTIC OUTPUT
CLOSE=NORMAL OPERATION
OPEN=FAULT
Alim. Aux.
Power Supply
Fiber Optic
Fibra Ottica
1
2
3
4
5
6
27
30
17
16
28
DIAG.
7
8 USCITA
OUTPUT4
OPZIONALE
OPTIONAL
M0
2N
G1
8-I
-Re
v.
8
MHCOTransducersOverall Dimensions - Transmitter (mm)
Overall Dimensions - Receiver (mm)
159
31
353570
52,5
120
Ø7
225
29
11
42,5
140
10
175
220
M6
10 200
60
75
95
10
MHCO-TVI
30
6970
42,5
140
52,5
120
Ø7
225
175
220
11
29
M6
20010
10
60
75
95
51
MHCO-T...
ON
DIAG
(*)90
62
45
160
3073
MHCO-R
1 52 3 4 6
30 2529 28 27 24 17 16
7
8
STANDARD
VERSION
(*) OUTPUT 4 - OPTIONAL
M0
2N
G1
8-I
-Re
v.
9
MHCOTransducers
R Seference tandard - EN50123 - IEC60255CE Directive
Dielectric test voltage IEC60255-5 cat IV - 2kV
EN50123
IEC60255-5
EN50123
(EN50124-1 cat OV4 - 18.5kV)
cat IV - 5kV
(EN50124-1 cat OV4 - 40kV)
Impulse test voltage
Enviromental Rif.Std. (IEC 60068)
Operation ambient temperature EN60870-2-2 class C1 (3k5) -10°C / +55°C
Environmental
testing( )Cold
( )Dry heat
( )Change of temperature
( )Damp heat, steady state
IEC60068-2-1
IEC60068-2-2
IEC60068-2-14
IEC60068-2-3
-10°C ; 16h
+55°C ; U.R.<=35%; 16h
+55°C ; -10°C ; 3h
+40°C ; U.R.<=93%; 96h
Resistance to vibration
Resistance to vibration and shock (bump-shock)
Sismatic stress resistance
IEC60255-21-1
IEC60255-21-2
IEC60255-21-3
class 2
class 1
class 2
10-500 Hz ; 2 g
10 g - 15 g
1 g (xy), 2 g (z)
CE EMC Compatibilità
Electromagnetic emission EN55011
class B
30-1000MHz (tab1 EN50081-2) A
0.15-30 MHz (tab1 EN50081-2) A10VConducted disturbances immunity test EN55022
level 3 80-1000MHz 80%AM B10V/mRadiated electromagnetic field immunity test EN60870-2-1 A.5.1
IEC61000-4-3
EN50082-2
EN50140, EN50204
EN50082-2
ENV50140
level 3
level 3
900MHz/200Hz A10V/m
Electrostatic discharge test EN60870-2-1 A.3.1
IEC61000-4-2
level 3 6kV contatto / 8kV aria B
Power frequency magnetic test EN60870-2-1 A.4.1
IEC61000-4-8
level 5 continui 100 A/m A50/60Hz
Conducted disturbances immunity test EN50082-2
IEC61000-4-6
level 3 (80 5)% AM1 kHz sinwave� A
Damped oscillatory magnetic field EN60870-2-1 A.4.3
IEC61000-4-10
level 3 30 A/m, 0.1 1 MHz�
Electrical fast transient/burst (Fast Trasient) EN60870-2-1 A.2.3
IEC61000-4-4
level 3 2kV (m.c.) B
Dumped Oscillatory waves EN60870-2-1 A.2.5
IEC61000-4-1
level 3 1kV (m.c.)
Power supply tollerance IEC60870-2-1 class DC3
class AC2
EN60870-2-1 VR3 �5%Residual power supply
Surge immunity test EN60870-2-1 A.2.2
IEC61000-4-5
level 3 8/20 s 2kV (m.c.) B
Voltage interruptions EN60870-2-1 A.1.5
IEC61000-4-11
20ms
Voltage ripple EN60870-2-1 A.1.4
IEC61000-4-11
A=B
Characteristics
Accuracy at reference value of influencing factors Class 0.2
Average power supply consumption RX 7 VA
Average power supply consumption TX 5 VA
Output relays
A.C. resistive switching = 1500VA (400V max)
rating 6 A; n = 250 VV
make = 30 A (peak) 0,5 sec.; break = 0.2 A, 110 Vcc,
L/R = 40 ms (100.000 op.) – Meccanichal life 10 op6
M0
2N
G1
8-I
-Re
v.
Transmitter Voltage - Order Code MHCO-TV - 3-6:
Type_MHCO-TV Power Supply3
0 = N.D.
1 = N.D.
2 = (33 70)Vdc�
3 = (85 160)Vdc�
4 = 110Vac 20%�
5 = 230Vac 20%�
Rated Input Voltage6
1 = 200 Vdc
2 = 750 Vdc
3 = 1000 Vdc
4 = 1500 Vdc
5 = 3000 Vdc
6 = 4000 Vdc
Empty = Power Supply
Transmitter Current - Order Code MHCO-TI - 2-1-1-2:
Type_MHCO-TI Power Supply2
0 = N.D.
1 = N.D.
2 = (33 70)Vdc�
3 = (85 160)Vdc�
4 = 110Vac 20%�
5 = 230Vac 20%�
Rated Input Current1
1 = 60 mVdc
2 = 80 mVdc
3 = 100 mVdc
Empty = Power Supply
Dynamic range1
1 = (0 2) In���
2 = (0 10) In���
Selfpowered version
SHUNT connection
2
1 = Positive
2 = Negative
Receiver Voltage - Order Code MHCO-RV - (12)-(22)-(32)-3:
Type_MHCO-RV Output 1( _ )1
1-1 = (0 20) mA���
1-2 = (4 20) mA�
1-3 = (0 10) mA���
O = with Options
(MHCO-RV-O-....)
Power Supply3
1 = N.D.
2 = (33 70)Vdc�
3 = (85 160)Vdc�
4 = 110Vac 20%�
5 = 230Vac 20%�
Output 2( _ )2
2-1 = (0 20) mA���
2-2 = (4 20) mA�
2-3 = (0 10) mA���
Output 3( _ )3
3-1 = (0 20) mA���
3-2 = (4 20) mA�
3-3 = (0 10) mA���
Receiver Current - Order Code MHCO-RI - (12)-(22)-(32)-(42)-3:
MHCO-RI Output 1( _ )1
1-1 = (0 20) mA���
1-2 = (4 20) mA�
1-3 = (0 10) mA���
Power Supply3
1 = N.D.
2 = (33 70)Vdc�
3 = (85 160)Vdc�
4 = 110Vac 20%�
5 = 230Vac 20%�
Output 2( _ )2
2-1 = (0 20) mA���
2-2 = (4 20) mA�
2-3 = (0 10) mA���
Output 3( _ )3
3-1 = (0 20) mA���
3-2 = (4 20) mA�
3-3 = (0 10) mA���
1-4 = (0 15) mA��� 2-4 = (0 15) mA��� 3-4 = (0 15) mA���
Output 4( _ )4
4-0 = None
4-1 = (-0.75 1.5) (In)���
4-2 = (0 1.25) (In)���
4-3 = (0 1) (In)���
4-4 = (0 1.33) (In)���
4-5 = (-0.75 0.75) (In)���
4-6 = (-1 1) (In)���
4-7 = (-2 2) (In)���
4-8 = (-1.33 1.5) (In)���
12
MHCOTransducers
Type_
O = with Options
(MHCO-RV-O-....)
(x DIA / U-MLEs)
4 = Specify
Fiber Optic - Order Code MHCO-FO - 1:
Fibra Ottica
1 = 5 mt (standard)
2 = ________mt (specifiy length)
ST - Connector
55 mm
Receiver Current (x DIA / U-MLEs) - Order Code MHCO-RI - (12)-(22)-(32)-(42)-3:
MHCO-RI Output 1( _ )1
1-1 = (0 20) mA���
1-2 = Not Available
1-3 = Not Available
Power Supply3
1 = N.D.
2 = (33 70)Vdc�
3 = (85 160)Vdc�
4 = 110Vac 20%�
5 = 230Vac 20%�
Output 2( _ )2
2-1 = (0 20) mA*���
2-2 = Not Available
2-3 = Not Available
Output 3( _ )3
3-1 = (0 20) mA���
3-2 = (4 20) mA�
3-3 = (0 10) mA���
1-4 = Not Available 2-4 = Not Available 3-4 = (0 15) mA���
Output 4( _ )4
4-0 = None
4-1 = (-0.75 1.5) (In)���
4-2 = (0 1.25) (In)���
4-3 = (0 1) (In)���
4-4 = (0 1.33) (In)���
4-5 = (-0.75 0.75) (In)���
4-6 = (-1 1) (In)���
4-7 = (-2 2) (In)���
4-8 = (-1.33 1.5) (In)���
Type_
O = with Options
(MHCO-RV-O-....)
*(10In)
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