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BCS Switchgear Inc. Switchgear | Circuit Breakers | Parts | Tech Support Low Voltage Circuit Breaker Selection and application guide WL Circuit Breakers Answers for industry. bcsswitchgear.com | 888.599.0486 Need Help? 888.599.0486...
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Registered Trademarks WinPM.Net is a registered trademark of Siemens Industry, Inc. Caution MODBUS® is a registered trademark of Schneider Automation, For the purpose of this manual and product labels, CAUTION Inc.
BCS Switchgear Inc. Switchgear | Circuit Breakers | Parts | Tech Support Low Voltage Circuit Breaker Table of contents Features and benefits ............2 Undervoltage release ............28 Breaker assembly view ............3 Charging motor, motor switch, operations counter ...28 Draw-out cradle assembly view..........4 Close coil, power metering and communications ....29 Breaker locks ..............29 Electronic trip units ............5- 11...
A good example of our innovative technology is, Dynamic to name a few. Yes, mission critical applications trust the Siemens Arc-Flash Sentry® (DAS). DAS is an option that allows users WL circuit breakers to operate safe and reliably. The compact...
Low Voltage Circuit Breaker Exterior breaker features 4. Integral racking handle with position indicator 1. Sliding secondary control contacts 5. Trip unit with full metering grade LCD 2. Padlock capable spring charging handle 6. Low profile arc chutes 3. Centralized operator panel Interior breaker features 1.
Low Voltage Circuit Breaker Electronic trip units Electronic trip units (ETUs) Short-time trip Power system protection is necessary to treat common types of The short-time pickup adjustment is used to set the level of abnormal occurrences, such as overloads or faults that can lead high current the breaker will carry for a short period of time to electrical power system failure.
Low Voltage Circuit Breaker Electronic trip unit (ETU) ETU communication The ETU uses a Siemens proprietary communication network called CubicleBus. The CubicleBus network ensures all Siemens devices are able to transmit data reliably and efficiently. The ETU can not be connected directly any other network so the use of converters are necessary to allow communication between the ETU and the outside world.
Low Voltage Circuit Breaker Electronic trip unit (ETU) Power metering function In addition to excellent protection capabilities, the WL ETU has used for overload protection. ETU power metering can measure unparalleled power metering functionality. True RMS current the following: sensing for metering is obtained from the same current sensors Measured value Value range Accuracy...
Low Voltage Circuit Breaker Electronic trip unit (ETU) Alarm parameters The metering function includes the following alarm set-point functions: Alarm function Setting range Possible delay Overcurrent 3 ... 10000A 0 ... 255 s Overcurrent – ground fault 3 ... 10000A 0 ...
Low Voltage Circuit Breaker ETU function overview Basic functions ETU745 Long-time overcurrent protection Function can be switched ON/OFF – Setting range I x ... 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.8, 0.9, 1 0.9, 1 Switch-selectable overload protection t or I t dependent function) Setting range of time delay class t at I...
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Low Voltage Circuit Breaker Electronic trip units (ETU) Basic functions ETU748 ETU776 Long-time overcurrent protection Function can be switched ON/OFF – – Setting range I x ... 0.4, 0.45, 0.5, 0.55, 0..1 (step: 1A) 0.6, 0.65, 0.7, 0.8, 0.9, 1 Switch-selectable overload protection t or I t dependent function)
Low Voltage Circuit Breaker Breaker accessories and options Breaker mounted options Auxiliary contacts Auxiliary contacts can be used to provide interlocking control Ground fault module or remote indication of the breakers main contact position (open The ground fault module (GFM) is used to detect current or closed breaker).
Low Voltage Circuit Breaker Breaker accessories and options Bell alarm contact and reset coil Breaker push button lock-outs If conscious use of the breaker close or open push button is The bell alarm contacts are mechanically activated by the trip unit solenoid.
Low Voltage Circuit Breaker Breaker accessories and options Spring charging handle lock Shunt trip An optional padlock provision to prevent manual charging of the The shunt trip opens the circuit breaker instantly when energized closing springs can be installed on the breaker front cover. This by a remote power source.
Low Voltage Circuit Breaker Breaker accessories and options Undervoltage release Status contact In the event of loss or low level control circuit voltage, an A status contact is a mechanical switch that is suitable for undervoltage release may be used to automatically open monitoring an undervoltage trip or shut trip coil position.
WL breakers factory wired circuitry. Three types of external connection terminals are available. 1. Screw compression for bare wire, 2. Tension spring compression for bare wire and, 3. Captive screw connections for Siemens type ring lugs (WL10RL). Characteristics table Operating voltage 24VDC...
Low Voltage Circuit Breaker Cradle accessories and options Arc chute cover MOC (mechanism operated contacts) The arc chute cover is available for isolating enclosure material If additional auxiliary contacts are needed beyond what is or parts located above the circuit breaker where heat and supplied on the breaker, a MOC switch may be used to obtain exhaust gases may exit from the breakers arc chutes.
Communication and metering power supply Breaker display adapter (BDA) For WL devices that require a 24VDC input we offer the Siemens The BDA can be used to read or modify the breaker ETU and SITOP power supply. The SITOP power supply is a class 2 rated Cubiclebus parameters using a laptop, pocketPC or remote devices suitable for supporting loads of 2.5 or 3.8 amps.
Low Voltage Circuit Breaker Accessories Metering current transformer 3-phase window Metering current transformer – neutral phase (cradle mounting only) A single piece housing that is compact and designed to fit around neutral bussing. Termination screws are integral to the mold for For draw-out breaker applications a three phase metering CT is available.
Low Voltage Circuit Breaker Accessories Neutral current sensor – 4-wire residual Neutral current sensor – direct sensing or For 4-wire residual ground fault protection we offer neutral modified differential current sensors with or without bus bar coupling. The sensors are For direct measurement of ground source current between the comparable to the sensors used within the breaker and connected transformer neutral point to ground select the Direct Ground...
Low Voltage Circuit Breaker Accessories Breaker lifting device Digital input module The breaker lifting device is designed to safely transport the The digital input module enables up to six additional binary WL breaker when using a hoist or other lifting equipment. The signals (24V DC) to be connected.
Low Voltage Circuit Breaker Accessories Analog output module Primary lug connector kits are available for connecting 800 to The analog output module can be used to output the most 2000A WL front connector bus kits to power cables. important measured values sent via the CubicleBUS to analog Frame size 1, 1200A max, 65kA max.
Low Voltage Insulated Case Circuit Breaker UL 489 Listed catalog number Breaker catalog number Rating Plug 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 For use with Maximum frame size continuous current rating 1000 1200 1250...
Low Voltage Insulated Case Circuit Breaker UL 489 Listed catalog number Breaker catalog number Bell alarm, breaker ready-to-close, auxiliary contacts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Bell alarm Remote reset Breaker coil voltage Form C ready-to-close...
Low Voltage Insulated Case Circuit Breaker UL 489 Listed catalog number Breaker catalog number Undervoltage Release (with or without time delay) or 2nd Shunt Trip 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Operation voltage UVR status...
Low Voltage Insulated Case Circuit Breaker UL 489 Listed catalog number Breaker catalog number Close coil, power metering and communications 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Close coil Power metering PROFIBUS operation voltage capable MODBUS...
Low Voltage Insulated Case Switch UL 489 Listed non-automatic catalog number Switch catalog number Shunt trip 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Operation voltage Status Shunt Continuous duty rated contact trip (trip free interlock) None Undervoltage release (with or without time delay) or 2nd shunt trip...
Low Voltage Insulated Case Switch UL 489 Listed non-automatic catalog number Switch catalog number Charging motor, motor switch and operation counter 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Charging motor operation voltage Motor cut-off Operations switch...
Low Voltage Insulated Case Circuit Switch UL 489 Listed non-automatic catalog number Switch catalog number Switch locks 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Key lock breaker Key lock breaker Padlock provisions for Padlock provisons OPEN position (lock OPEN position (lock...
Low Voltage Insulated Case Circuit Breaker UL 489 Listed accessories External breaker accessories Description Catalog number Front mount connectors for fixed breakers FSI, 85kA max. 800A, 1200A WLHF12CONUL FSII, 100kA max 1600A WLL2F16CONUL FSII, 100kA max 2000A WLL2F20CONUL FSII, 100kA max 2500A WLL2F25CONU FSII, 100kA max...
Low Voltage Power Circuit Breaker UL 1066 Listed catalog number Interrupting rating, frame size, breaker type and frame rating Breaker catalog number Note: Cradle must be ordered separately (see page 49) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Group Interrupt rating (kA) Frame...
Low Voltage Power Circuit Breaker UL 1066 Listed catalog number Breaker catalog number Bell alarm, breaker ready-to-close, auxiliary contacts 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Bell alarm Remote reset Breaker coil voltage Form C ready-to-close Auxiliary contacts...
Low Voltage Power Circuit Breaker UL 1066 Listed catalog number Breaker catalog number Undervoltage release (with or without time delay) or 2nd shunt trip 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Control voltage 2nd shunt without delay...
Low Voltage Power Circuit Breaker UL 1066 Listed catalog number Breaker catalog number Close coil, power metering and communications 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Close coil Power metering PROFIBUS operation voltage capable Modbus None...
Low Voltage Power Circuit Switch UL 1066 Listed non-automatic catalog number Switch catalog number Charging motor, motor switch, operations counter 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Charging motor operation voltage Motor cut-off Operations switch counter...
Low Voltage Power Circuit Switch UL 1066 Listed non-automatic catalog number Switch catalog number Switch locks 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Key lock breaker Key lock breaker Padlock provisions for Padlock provisons OPEN position (lock OPEN position (lock OPEN and CLOSE...
Low Voltage Breaker General wiring schematic WL CIRCUIT BREAKER LINE LOAD ETU745, ETU748, ETU755, ETU776 3P, 4W: INTERNAL WIRING 600V AC POTENTIAL TRANSFORMER INPUTS - OR - 3P, 4W: CubicleBus WIRING IS CONTINUOUS IF NO 480V AC METERING MODULE METERING MODULE IS INSTALLED BONDING MUST BE SEE DETAIL BELOW UPSTREAM OF SENSOR...
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Low Voltage Breaker General wiring schematic CubicleBus MODULES INSTALL TERMINATING RESISTOR (ZSI) ZONE SELECTIVE DIGITAL OUTPUT MODULE DIGITAL OUTPUT MODULE ANALOG OUTPUT DIGITAL INPUT INTERLOCKING MODULE WITH ROTARY SWITCH CONFIGURABLE MODULE MODULE MUST BE FIRST MODULE RJ45 RJ45 RJ45 RJ45 RJ45 RJ45 RJ45...
Low Voltage Breaker Ground fault setting Residual sensing of the ground fault current Ground Fault Protection Direct measurement of the ground When optional ground fault is fault current selected, the trip unit detects fault currents that flow to ground and A current transformer with the represent a fire hazard to the system.
Low Voltage Breaker Metering voltage details VT / PT connections for the WL Breaker when equipped The following ratios are suggested and equivalent VTs can with metering be used: WL power metering (“Meter Function”) can accept 3W or 4W 240:120 = 2:1 (ITI Part # 460-240 or 468-240) (LL/LN) system voltage connections.
Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 door cut-out WL Circuit Breaker selection and application guide...
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Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 outline Fixed mount frame size 1 with horizontal stab and vertical connectors WL Circuit Breaker selection and application guide...
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Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 with horizontal connection WL Circuit Breaker selection and application guide...
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Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 with vertical connectors WL Circuit Breaker selection and application guide...
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Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 with front connectors WL Circuit Breaker selection and application guide...
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Low Voltage Breaker Fixed breaker dimensions Fixed mount frame size 1 with front connectors and wire terminals WL Circuit Breaker selection and application guide...