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WL Low Voltage Metal-Enclosed Switchgear

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WL Low Voltage Metal-Enclosed Switchgear Selection and Application Guide usa.siemens.com/switchgear Type WL Low Voltage Metal-Enclosed Switchgear Table of Contents General Information 2 Construction Details 3-5 WL Circuit Breaker 6-8 Electronic Trip Unit 9-15 Breaker Technical Data 16-17 WL Secondary Terminal Assisgnments 18 Section Configurations 19-20 Shipping Weights and Dimensional Information 21-29 VT, CPT, CT Data 30 1 Type WL Low Voltage Metal-Enclosed Switchgear General Information Siemens Type WL low voltage metal- enclosed switchgear is designed, constructed and tested to provide superior power distribution, power monitoring and control. At the heart of the Type WL low voltage switchgear is the World Class Siemens WL breaker. Siemens Type WL low voltage switchgear can be utilized in the following applications: • Industrial Heavy assembly Semiconductor Petrochemical Automotive Biotech Pharmaceutical • Institutional Type WL Low Voltage Metal-Enclosed Switchgear Water treatment Airports Industry Standards Universities • ANSI C37.17 – Trip Devices for AC Type WL switchgear with power circuit Medical facilities and General Purpose DC Low-Voltage breakers are designed, tested and Correctional facilities Power Circuit Breakers constructed in accordance with: • NEMA SG3 - Low Voltage Power • Critical Power • UL 1558 – Metal-Enclosed Low Circuit Breakers Data Processing Voltage Power Circuit Breaker Continuous industrial process Switchgear Features and modifications required by Hospitals • ANSI C37.20.1 – Metal-Enclosed NEC are incorporated when the assembly • Utility and co-generation Low Voltage Power Circuit Breaker is designated as “Service Equipment.” Switchgear UL Listing • Commercial • ANSI C37.50 – Test Procedure for Underwriters’ Laboratories listing mark Large office buildings Low Voltage AC Power Circuit (UL) is supplied for each vertical section Distribution centers Breakers Used in Enclosures provided all devices within a vertical Large warehouses • ANSI C37.51 – Conformance section are UL Listed or UL Recognized Testing of Metal-Enclosed Low Product Scope: and suitable for the intended use. All Voltage AC Power Circuit Breaker • Equipment ratings circuit breaker drawout elements are Switchgear Assemblies 635VAC Maximum UL Listed. 3 Phase 3 Wire, • NEMA SG5 - Power Switchgear 3 Phase 4 Wire Assemblies Optional CSA compliance with cUL 50/60 Hz • Applicable requirements of the labeling is available. National Electric Code (NEC) 6000 amp maximum horizontal bus Arc Resistant 6000 amp maximum vertical bus WL drawout circuit breakers are in Optional Type WL arc resistant low • Enclosure options accordance with: voltage switchgear is available and is UL NEMA 1 Indoor • UL 1066 – Low Voltage AC and listed to ANSI/IEEE C37.20.7. Type 2B NEMA 3R Outdoor Walk-In DC Power Circuit Breakers Used arc resistant accessibility rating with NEMA 3R Outdoor Non Walk-in in Enclosures maximum internal arcing short-circuit • ANSI C37.13 – Low Voltage AC Power current rating of 100kA @508V and Siemens WL breakers can be manually Circuit Breakers Used in Enclosures 85kA @ 635V. or electrically operated, fused or unfused • ANSI C37.16 – Preferred Ratings, and are available in the following rating Related Requirements, and Seismic Qualification designations – N, S, H, L, M and F. Application for Low Voltage Power Seismic qualification to all major seismic Refer to tables on Page 13 for interrupt Circuit Breakers and AC Power construction standards (IBC, UBC, CBC, and withstand ratings for each Circuit Protector SBC, BOCA and IEEE 693) is available. rating designation. 2 Type WL Low Voltage Metal-Enclosed Switchgear Construction Details General Standard finish color is light gray ANSI Each complete vertical section contains The Siemens Type WL switchgear 61. The standard painting process is a three compartments. assembly consists of one or more UL approved electrostatic powder coat (1) Front compartment containing metal-enclosed vertical sections. The paint system utilizing a polyester powder breakers and/or auxiliary equipment end sections are designed to allow coat paint. The completed finish has (2) Bus compartment containing installation of future sections. a nominal 2 mils dry film thickness. horizontal and vertical bus (3) Rear cable compartment containing Each vertical section consists of up to Assembly Construction the load side runbacks connecting four individually enclosed breaker or Siemens Type WL metal-enclosed low the load side of the breaker to the auxiliary compartments which are sized voltage switchgear is constructed of load cable terminals to provide uniform height. a rigid internal frame structure that minimizes the possibility of damage Within the front compartment, each Included in each assembly are various during shipment and supports multiple breaker is barriered and compartmented components such as circuit breakers, installation methods – rolling or lifting. from all other breakers in the front instrumentation and control equipment, Lifting eyes are integrated into the compartment. This design also isolates transformers, relays, three-phase bus internal frame design and ensure the breakers in the front compartment work, and all internal wiring, connectors, the structural integrity of the lifting from the bus compartment. and other supporting equipment. assembly is always adequate for the Optional barriers can be supplied to In accordance with ANSI C37.20.1, the weight of the total structure. isolate the bus compartment from the maximum temperature for parts that If requested in advance, the switchgear rear cable compartment. Other optional are handled is 50°C. The main bus structure can be shipped so that the barriers include: (1) Full depth section maximum temperature rise is 65°C unit can be tilted onto its back during barriers to isolate one section from the above 40°C ambient. The temperature installation. This is an option that must adjacent section(s). (2) Barriers to isolate rise of the air surrounding the cable be specified at order entry. the incoming line side connections to connection points is limited to 45°C the main breaker(s) from the load side above 40°C ambient. bus and connections in the switchgear Finish section. (Line/load barriers are provided During construction, the structural steel as a standard feature for service parts, panels, and compartments are all equipment main breakers.) prepared for painting by a five-stage wash system. 1 2 1. Breaker Hoist and Track 2. Ventilation and Lifting Structure 3. Quarter Turn Door Latch 4. Secondary Disconnect Access Door 5. Riser Base (Optional) 3 6. Breaker Compartment 7 7. Auxiliary Instrument Compartment 8. Secondary Disconnect 9. Breaker Cradle (Guide Frame) 4 10. Breaker Drawout Rail 6 11. TOC Switch Operator 8 11 9 10 5 3 Type WL Low Voltage Metal-Enclosed Switchgear Construction Details Main and Ground Bus Control and Communication Wiring Circuit Breaker Compartments The standard main bus is silver-plated- Standard control and communication Typical circuit breaker compartments copper. Tin-plated copper bus is optionally wiring is #14 AWG extra-flexible, include primary disconnects, drawout available. Vertical and horizontal bus stranded copper type SIS. Control and rails, secondary disconnects, vertical bar utilize a channel shape design to communication wiring is installed and wireway, horizontal wireway and, maximize short circuit withstand accessed from the front of the switchgear if applicable, TOC switch operator, capability and minimize heat rise. All structure. Each breaker compartment MOC switch operator and associated bus joints include Grade 5 bolts and has a dedicated horizontal and interlocks. Draw-out rails allow the conical spring washers. Provisions for vertical wireway. breaker to be withdrawn from the future extension of the main bus include compartment without additional For devices not having screw-type plated joints and high tensile strength extensions or adapters. Up to six (2 terminals, pressure terminals are used. steel hardware. sets of three) current transformers for Insulation metering or relaying can be mounted The main three-phase horizontal bus The insulation used is a UL recognized in each compartment. is arranged vertically one phase above thermoset material that has excellent heat the other with edge-to-edge alignment A variety of auxiliary devices such as resistance, flame retardance, dimensional to provide high, short circuit strength. breaker control switches, indicating stability and low moisture absorption. Insulated main bus with isolated vertical lights and pushbuttons can be mounted bus is optional. on the breaker compartment door. Vertical bus ratings available are 1600, 2000, 3200, 4000, 5000 and 6000 amperes continuous current. Horizontal 1 2 3 4 bus ratings available are 1600, 2000, 3200, 4000, 5000 and 6000 amperes. A neutral bus is furnished when specified, and can be rated 1600, 2000, 3200, 4000, 5000 or 6000 amperes continuous current. A 1/4” X 3” standard copper ground bus extends through all sections. Cable lugs are mounted to the ground bus in each section. Standard short-circuit withstand (4 cycle) and short-time withstand (60 cycle) bus bracing is 100,000 amperes. Higher shortcircuit withstand bus bracings (150kA and 200kA) are available. Load side runbacks for feeder circuits are copper construction, are insulated with sleeve tubing in the main bus area, and are supported by high-strength bus bracing. 5 6 7 8 1. TOC Switch Operator 5. Interference Interlock 2. Breaker Compartment Rear Barrier
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