SIVACON Power Distribution Boards, Busway and Cubicle Systems · SIVACON Power Distribution Boar ds, Busway and Cubicle Systems Introduction 14/2 Siemens LV 1 T · 2008 14 Overview
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Siemens LV 1 T · 2008
14
SIVACON Power Distribution Boards, Busway and Cubicle Systems
14/2 Introduction
Switchgear14/5 S8 power distribution boards
Components for 8US, 8UC, 4NC Distribution Systems 8US Busbar Systems
14/9 General data
40 mm Busbar Systems14/10 General data14/11 Base assemblies14/12 Supply and connection technologies14/13 Busbar adapters and device holders14/16 Accessories
60 mm Busbar Systems14/17 General data14/18 Base assemblies up to 630 A14/21 Base assemblies up to 1600 A14/22 Supply and connection technologies14/24 Busbar adapters and device holders14/27 Bus-mounting fuse bases14/28 Accessories
Components for 8US, 8UC, 4NC Distribution Systems 8UC Door-Coupling Rotary Operating Mechanisms
14/29 General data14/31 For 3K switch disconnectors14/31 For 3VF and 3VL circuit breakers14/32 Individual parts14/33 Operating mechanisms for fixed
mounting
Components for 8US, 8UC, 4NC Distribution Systems 4NC Current Transformers for Measuring Purposes
14/34 General data14/36 Classes 1 and 3, from 50 A to 1500 A
SIVACON Power Distribution Boards, Busway and Cubicle Systems
Introduction
14/2 Siemens LV 1 T · 2008
14
■ Overview
✓ Standard
-- Not available1) Circuit breakers optionally in withdrawable version.
Type Busbar position at top Busbar position at rearS8 power distribution boardsBusbar position Top RearRated currents• Busbars up to 3270 A 4000 A• Infeed up to 3200 A 4000 A
Short-circuit strength Ipk up to 220 kA 220 kA (250 kA)Equipment layout• Fixed-mounted version ✓1) ✓1)
SIVACON S8 - the type-tested power distribution board
The SIVACON S8 low-voltage switchboard is a variable, versatile, and type-tested low-voltage controlgear combination (TTA) which is used both in infrastructural supply in administrative and functional buildings as well as industrial and commercial buildings.
The SIVACON S8 consists of standardized and typified components which can be flexibly combined as a cost-effective overall solution.
The SIVACON S8 sets itself apart through its high degree offlexibility and quality with space-saving dimensions and the highest level of personal and machine safety.
We or our authorized contractual partners take care of the following:• Customized configuration• The mechanical and electrical construction• Inspection
Here we use type-tested functional components. We use the documentation prescribed by us as the basis for our authorized contractual partners.
SIVACON S8 can be used as a type-tested power distribution board up to 4000 A.
Standards and specifications
SIVACON S8 is a type-tested low-voltage controlgear combinations (TTA) according to IEC 60439-, EN 60439-1 (VDE 0660 Part 500). SIVACON S8 is designed to be resistant to arcing faults according to IEC 61641, EN 60439 (VDE 0660 Part 500), supplement sheet 2.
Equipment layouts
The following equipment layout is available (description from left to right):(1)Circuit breaker section with Sentron 3WL up to 4000 A or 3VL up to
1600 A.
(2)Universal installations for cable feeders up to 630 A in fixed-mounted and plug-in versions (3NJ6)
(3) In-line design 3NJ6 (plug-in) for cable branches up to 630 A in plug-in version.
(4)Fixed mounting section (front panel) for cable feeders up to 630 A and modular installation devices.
(5)3NJ4 in-line type (fixed installation) for cable feeders up to 630 A(6)Reactive-power compensation up to 500 kvar
The segments for the installation of 3WL and 3VL circuit breakers are used to feed the switchgear and for outgoing units and busbar couplings (longitudinal and cross coupling). It is important for the entire circuit breaker design that only one switch per section is used.
The device installation space is intended for the following functions:• Infeeds/outgoing units with 3WL circuit breaker in
fixed-mounted and withdrawable version up to 4000 A• Longitudinal and cross coupling with 3WL circuit breaker in
fixed-mounted and withdrawable version up to 4000 A• Infeeds/outgoing units with 3VL circuit breaker in
fixed-mounted version up to 1600 A
On (2): Universal installation equipment
The fields for cable branches with fixed-mounted and plug-in version to 630 A are intended for the installation of the following controls:• SIRIUS 3RV motor starter protector / 3VL circuit breaker• SENTRON 3K switch disconnector• SENTRON 3NP switch disconnector• SENTRON 3NJ6 switch disconnector with plug-in version
The controls are mounted on mounting plates and are connected to the vertical distribution busbars with the infeed side. It is possible to install plug-in 3NJ6 in-line disconnectors via an adapter. Now the field is covered with field doors or compartment doors.
On (3): 3NJ6 in-line design plugged in
The fields for cable branches in plug-in design up to 630 A are intended for the installation of switch disconnectors in in-line disconnector form.
They offer an affordable alternative to the withdrawable version with the supply-line side plug-in contact. Due to their modular structure, they allow quick and easy retrofitting or replacement under operating conditions.
The device installation space is provided to accommodate plug-in in-line disconnectors of 185 mm.
The plug-in busbar system is arranged in the field in the back and is covered with optional touch protection with tap openings in degree of protection IP 20. This makes it possible to replace with in-line disconnectors without shutting down the switchgear.
On (4): Fixed-mounted version with front panels
The fields for cable branches with fixed-mounted versions up to 630 A are intended for the installation of the following controls:• SIRIUS 3RV motor starter protector / 3VL circuit breaker• SENTRON 3K switch disconnector• SENTRON 3NP switch disconnector• Modular installation devices
The controls are based on steplessly adjustable device holders and are connected to the vertical distribution busbars with the infeed side. The field with masking frames with and without swivel function or with additional doors with or without view window is covered toward the front.
The fields for cable feeders in fixed-mounted versions up to 630 A are intended for the installation of 3NJ4 in-line fuse switch disconnectors.
With their compact design and modular structure, the in-line fuse switch disconnectors provide the optimum installation conditions in terms of the achievable packing density.
The field busbar system is arranged horizontally in the field. The field busbar system is connected to the main busbar system with link rails.
The in-line fuse switch disconnectors are screwed directly onto the field busbar system.
On (6): Reactive-power compensation up to 600 kvar
The reactive power compensation fields consist of a controller module and one or more capacitator modules.
Choked or unchoked controller units are available for reactive power compensation depending on the consumer type. Depending on the installed output and the ambient temperature, the installation of a floor fan can be necessary to reinforce the convection.
The capacitator modules are connected together and connected to the horizontal main busbar system via the link rails. The capacitator modules are mounted on the fuse switch disconnectors.
Installation of capacitator modules:• Unchoked up to 600 kvar per field• Choked up to 500 kvar per field
It is also possible to install a group switch module in order to enable the field for maintenance and review purposes from the main busbar system.
1) Rated conditional short-circuit current (Icc) = 100 kA.
■ More information
You can find more information on the Internet at:
www.siemens.com/sivacon
Standards and specifications
Type-tested low-voltage controlgear combinations (TTA) IEC 60439-1, EN 60439-1 (VDE 0660 Part 500)
Inspection of behavior with internal errors (arcing faults) IEC 61641, VDE 0660 part 500, supplement sheet 2
Protection against electric shock EN 50274, VDE 0660 part 514
Rated insulation voltage (Ui), main circuit V 1000
Rated operational voltage (Ue), main circuit V up to 690
Clearances in air and creepage distances
Rated impulse withstand voltage (Uimp) kV 12
Overvoltage category IV
Degree of pollution 3
Busbars (3-pole and 4-pole)
Horizontal main busbars Rated current A up to 4000Rated surge current withstand capability (Ipk) kA up to 220Rated short-time withstand current (Icw) kA up to 100
Vertical busbars
• For circuit breaker design Rated current A up to 4000Rated surge current withstand capability (Ipk) kA up to 220Rated short-time withstand current (Icw) kA up to 100
• For universal and fixed-mounted version Rated current A up to 1600Rated surge current withstand capability (Ipk) kA up to 110Rated short-time withstand current (Icw) kA up to 501)
• For in-line design 3NJ4 (fixed installation) Rated current A up to 1600Rated conditional short-circuit current (Icc) kA up to 50
• For in-line design 3NJ6 (plug-in) Rated current A up to 2100Rated surge current withstand capability (Ipk) kA up to 110Rated short-time withstand current (Icw) kA up to 501)
Device rated currents
3WL/3VL circuit breaker A up to 4000
Cable feeders A up to 630
Internal separation (Form 1 to Form 4) IEC 60439-1, Section 7.7, VDE 0660 part 500, 7.7
Surface treatment (coating acc. to DIN 43656)
Frame parts Sendzimir-galvanized
Doors Powder-coated
Side panels Powder-coated
Back panels, roof plates Sendzimir-galvanized
Ventilation roof Powder-coated
Standard color of the powder-coated parts (coating thickness 100±25 µm) RAL 7035, light gray Design parts: Blue Green Basic
Degree of protection (acc. to IEC 60529, EN 60529) IP30, IP31,IP40,IP41,IP54, IP55
Dimensions (preferential dimensions acc. to DIN 41488)
8US busbar systems with 40 mm and 60 mm busbar center-to-center clearance as well as flat copper profiles have now become firmly established on the world market. The permissible busbar temperature is a decisive factor when dimensioning the busbars. The busbar temperature is dependent on the current and the current distribution, on the busbar cross-section and the busbar surface, on the position of the busbars, convection and the ambient temperature. The values stated in the following table can only be considered as guide values because the conditions vary with each location. The values are based on uninterrupted current over the whole busbar length.
The busbar runs prove most advantageous when the incoming supply is centrally located and the load is distributed symmetri-cally on both sides.
8US busbar systems are designed for horizontal mounting of the busbars.
■ Function
Short-circuit strength
The short-circuit strength of the busbar system is dependent on the distance of the busbar supports and on the busbar cross-section.
The short-circuit strength of the whole system is dependent on the short-circuit strength of the busbars and of the adapters with circuit breakers or switch disconnectors (see "Molded case circuit breakers (MCCB)" and "Switch disconnectors").
If one of these values is lower than the prospective short-circuit current at the place of installation, a current-limiting protective device has to be mounted upstream of the 8US busbar system. This may also be mounted as a feeder circuit breaker on the busbar system itself.
The 40 mm busbar system is used in machinery and plant engineering, in motor control centers and in power distribution systems of the low performance range up to 400 A.
The busbar cross-sections are adapted to the rated currents and are available in the sizes 12 x 5 mm, 12 x 10 mm, 15 x 5 mm and 15 x 10 mm. The basic system is configured without covers. If touch protection is required, this is possible with busbar covers.
An optimized spectrum of busbar adapters and device holders offers numerous adaptation and mounting options. Terminals round off the product range of the 40 mm busbar system.
The 60 mm busbar system is used preferably in control cabinet installation, in motor control centers and in power distribution systems of the medium performance range (630 A) and top performance range (1600 A, special profile).
The 60 mm busbar system can be used as a basic system without covers, as a partly compartmented system or as a fully compartmented system with bottom trough. The busbar cross-sections are available in the sizes 12 x 5 mm to30 x 10 mm and as a special profile.
Busbar adapters for SIRIUS, 3VL circuit breakers, 3KA and 3KL switch disconnectors, 3NP5 fuse switch disconnectors and 3NP4 directly mountable fuse switch disconnectors offers numerous options for configuring this busbar system. Incoming feeders, terminals and other accessories open up a large range of application.
Busbars with a special profile are suitable for applications up to 1600 A. All components of the 60 mm busbar system can be fitted.
4 standard sizes of operating mechanisms are available:
1) Operating mechanisms tested with triple torque (VDE 0660 Part 107). They are therefore qualified for use in all controls, especially for disconnectors.
2) Operation with two hands.
■ Design
Operating mechanisms consist of a masking plate with handle including seal and fixing screws for door installation and of a shaft coupling, extension shaft (300 mm) and coupling driver to be mounted onto the switch shaft. Operating mechanisms for 3KA/3KL/3KM switch disconnectors do not have a shaft coupling since the extension shaft is fitted directly into the switch. Extension shafts with a length of 600 mm are available.
Masking plates are light-gray with black inscription, handles are ti-grey. For EMERGENCY-STOP switches, a yellow indicator plate with black inscription is mounted; the handles are red. The retractable locking device (light green basic) for padlocks is integrated in the handle.
The door interlock on the rotary operating mechanisms is suitable for padlocks with shackle diameters of 4.5 mm to 8.5 mm (locks according to DIN 7465).
Up to three locks with shackle diameter of 8.5 mm or up to five locks with shackle diameter of 6 mm can be fitted.
Mounting instructions are included in the scope of supply. Operating instructions containing hints on activation or modification of interlocking conditions are available by quoting Order No. 8ZX1012-0UC60-1AA1 or can be downloaded from:www.siemens.com/lowvoltage
8UC7 door-coupling rotary operating mechanisms are capable of taking up a radial eccentricity of max. 5 mm between the actuating shaft of the switching device and the operating mechanism. Supporting the extension shaft is recommended with greater tolerances. ±5 mm can be compensated in axial direction. The distance between the door hinge and the center of rotary operating mechanism must not be less than 100 mm.
Permissible radial eccentricity and axial tolerance compensation
Switch position
In order to ensure compliance with locking and interlocking conditions, the controls and operating mechanisms must be installed such that, with two-position switches the "0" position lies at 9 o'clock and the "I" position at 12 o'clock.
Positions for two-position switches with 90° operating angle
Non-interchangeability
In order to ensure that, when installing switches and door-coupling operating mechanisms, all components - the actuating shaft, shaft coupling, extension shaft, coupling driver and door-coupling operating mechanism - are assembled in the correct position with respect to one another, all the above-mentioned parts are provided with non-interchangeability features (groove and lug).
For controls whose non-interchangeability groove is not at 3 o'clock in the "0" position or switches that can be installed at an angle of 90° to the left or right, the non-interchangeability groove can be repositioned.
When the switch and the door coupling are fitted, the rivet in the shaft coupling or coupling driver is moved accordingly. All door-coupling rotary operating mechanisms listed in this catalog are supplied with the "0" position of the mechanism at 9 o'clock and the "I" position at 12 o'clock. This refers to controls to be installed in the normal mounting position.
In operation and when performing maintenance, these non-interchangeability features preclude the risk of accidents caused by incorrect handling or incorrect switching operations.
Non-interchangeability features (see arrows) of rotary operating mechanisms
Size Rated torque1) Shaft profile Masking plate Nm mm x mm mm x mm
Correlation between handle of rotary operating mechanism and actuating shaft
Stops
To prevent damage to smaller switches, an excessive manual operating torque can be absorbed by stops fitted on the inside of sizes 1 and 2 rotary operating mechanisms. These stops are supplied loose with the operating mechanisms and can be fitted as required after consulting the operating instructions.
Stops are fitted at the factory to size 1 and 2 operating mechanisms with a 90° operating angle (exception: 3V. circuit breakers).
Pull-out strength
The pull-out strength of interlocked operating mechanisms, e.g. pulling off the shaft or destruction of the operating mechanism, amounts to ≥ 800 N when the pulling force acts directly onto the operating mechanism in direction of shaft.
■ Function
The basic (standard) versions of the rotary operating mechanisms comply with the following interlocking conditions:• Operating mechanism and switch in "0" (OFF) position:
The control cabinet door can be opened, the operating mechanism is uncoupled and the handle of the rotary operating mechanism engages. If padlocks are fitted with the control cabinet door closed and the actuator is set to "0", the operating mechanism (and switch) cannot be actuated and the door cannot be opened.
• Operating mechanism and switch in "I" (ON) position: The control cabinet door cannot be opened in this position. The interlocking mechanism can, however, be overridden by trained personnel (pressing of a concealed latch with a screwdriver or the like), thus making it possible to open the control cabinet door in the "I" position of the control for performing checks. The handle engages in the "I" setting with the door open. In the "I" position it is not possible to fit padlocks to lock the operating mechanisms.
Other interlocking conditions• If no door interlock is required, the user can remove the door
interlocking plate of the rotary operating mechanism after consulting the operating instructions.
• If provision is to be made for fitting padlocks to the rotary operating mechanism in the "I" position as well, the user can easily achieve this after consulting the operating instructions by knocking out a lug. Such a measure must not, however, be implemented with EMERGENCY-STOP rotary operating mechanisms. If padlocks are fitted in the "I" position of the rotary operating mechanism, the mechanism cannot be actuated, the control cabinet door cannot be opened and the operating mechanism cannot be overridden in order to open the door.
• If necessary the rotary operating mechanisms can also be locked in the 90°, 180° position etc. as well as in the "0" position. The measures previously listed in item 2 under "Other Interlocking Conditions" must be carried out by the user.
• In the case of rotary operating mechanisms for switches without "0" position, such as stepping switches without "0" position, the door interlocking plate is removed.
General criteria for the selection of current transformers for measurement purposes
Standards IEC 60185, DIN VDE 0414 Part 1 and 2Window-type current transformers The conductor to be measured (busbar or cable) is passed through the window opening and creates the primary
circuit of the window-type current transformer.Pin-wound transformers: An economical solution especially for small primary currents of 5 A to 75 A is achieved when the conductor to be measured is pin-wound several times.
Rated primary current Ipn Current transformers can be continuously loaded with 1.3 times the rated primary current (Ipn).Rated secondary current Isn1 A Particularly suitable for longer measuring leads. Cable losses of only 4% in contrast to
5 A current transformers.5 A 5 A current transformers create 25 times the power losses on measuring leads as compared with 1 A current
transformers. These stray losses result in higher power in the case of long cables. Only recommended for use with short measuring leads.
Current error ±1% at 1 × Ipn and 1.2 × Ipn Class 3 Coarse measurement
Current error ±3% at 0.5 × Ipn and 1.2 × Ipn Rated power Pn The rated power of transformers is specified in VA. The actual load rating should be similar to the rated power;
a lower actual load rating (underburden) increases the overcurrent factor and measuring devices may be damaged in case of a short-circuit, a higher actual load rating (overburden) has a negative effect on the accuracy.With a frequency of 60 Hz the rated power increases to 1.2 times. With 162/3 Hz the output power decreases to 1/3 of the rated power.
Maximum voltage for equipment Um This is the rms value of the maximum voltage between the conductors of a system. For this voltage the insulation must be rated at normal operating conditions.4NC5 current transformers are suitable for 720 V.
Overcurrent limiting factor FS The overcurrent limiting factor is expressed using the characters FS and a factor, e.g. FS5 or FS10.When a short-circuit current flows through the primary winding of a current transformer, the load on the measuring devices connected to the current transformer is the lower the smaller the overcurrent limiting factor is.
Rated short-time thermal current Ith The rated short-time thermal current Ith is the rms value of the primary current with a duration of one second, whose heat effect the current transformer can resist without being damaged in the event of a short-circuited secondary winding.
Rated impulse current Idyn The rated impulse current Idyn is the highest instantaneous value of the current after a short-circuit whose force the current transformer can resist without being damaged.The rated impulse current is specified as peak value.
Standards IEC 60185, DIN VDE 0414 Part 1 and 2Rated primary current Ipn A 50 ... 1500,
5 ... 75, for use as pin-wound transformer for low currentsRated secondary current Isn A 1 or 5Maximum voltage for equipment Um V 720Frequency Hz 50 ... 60Rated overcurrent limiting factor FS FS5 (DIN VDE/IEC)Max. uninterrupted current 1.2 × IpnRated short-time thermal current Ith 60 × IpnRated impulse current Idyn 2.5 × Ith or 150 × IpnAccuracy class 1 (3)Ambient temperature °C +55 at 1.0 × Ipn
°C +40 at 1.2 × Ipn°C -10 minimum value
Max. busbar temperature °C +120Molded-plastic class E (max. 120 °C continuously)Insulation Thermoplast enclosure, halogen-freeTest voltage kV 3 ACSecondary terminals Double terminals using M4 captive screws,
finger-safe to DIN VDE 0106 Part 100Solid mm2 2 × (2.5 ... 6)
Two-wire mm2 2 × (1.5 ... 4)
Terminals with same polarity primary ➝ secondaryK/P1 ➝ k/S1 (DIN VDE/IEC)L/P2 ➝ l/S2 (DIN VDE/IEC)