General, LV switchgear is typically installed

480V Metal-Enclosed Switchgear

General

480V Enclosed-MetalSwitchgear

Siemens low-voltage metal-enclosed switchgear is used in electric power dis- tribution systems for the control and pro- tection of circuits and equipment. The switchgear employs drawout type low voltage power circuit breakers described in Section 4.

LV switchgear is typically installed in:

JIndustrial Plants — for power and lighting networks and feeders, power generation and other auxiliaries, and to provide power for machine tools and material handling equipment drivers.

JUtility and Co-generation Facilities

— for motor control centers to protect and distribute power to electrical devices such as blowers, compres- sors, fans, pumps, and motors.

JCommercial and Residential Buildings — for protection and distri- bution of power for lighting, elevators, air conditioning, blowers, fans, motors, and pumps.

Available Types:

JType R — indoor (NEMA 1)

JType SR — outdoor walk-in (NEMA 3R)

Low-voltage switchgear can be applied on distribution systems with:

J3-phase, 3- or 4-wire feeders

J50 or 60Hz

JVoltages of 208, 240,480, or 600 volts

JCurrents up to 5000 amperes

Circuit breakers may be either manually or electrically operated, fused or unfused. The following designations are used:

JRL — Standard Interrupting

JRLE — Extended Interrupting

JRLI — High Interrupting

JRLF — Fused Type

Siemens Static Trip III trip units are pro- vided on all low voltage power circuit breakers, except non-automatic circuit breakers. All circuit breakers are UL Listed. See Tables 4.10 and 4.11 for cir- cuit breaker ratings.

480 Volt Metal-Enclosed Switchgear

Industry Standards

Types R and SR switchgear with power circuit breakers are designed, tested and constructed in accordance with:

JANSI C37.20.1 — Metal-Enclosed Low Voltage Power Circuit Breaker Switchgear

JANSI C37.50 — Test Procedure for Low Voltage AC Power Circuit Breakers Used in Enclosures

JANSI C37.51 — Conformance Testing of Metal-Enclosed Low Voltage AC Power Circuit Breaker Switchgear Assemblies

JApplicable standards of IEEE and

NEMA

JApplicable requirements of the National Electric Code (NEC)

JUL 1558 — Metal-Enclosed Low Voltage Power Circuit Breaker Switchgear

Type RL drawout circuit breakers are in accordance with:

JANSI C37.13 — Low Voltage AC Power Circuit Breakers Used in Enclosures

JANSI C37.16 — Preferred Ratings, Related Requirements, and Application for Low Voltage Power Circuit Breakers and ACPower Circuit Protectors.

JANSI C37.17 — Trip Devices for AC and General Purpose DC Low- Voltage Power Circuit Breakers.

JUL 1066 — Low Voltage AC and DC Power Circuit Breakers Used in Enclosures.

Features and modifications required by NEC are incorporated when the assembly is designated as “Service (Entrance) Equipment.”

UL Listing (Optional)

An Underwriters’ Laboratories listing mark (UL label) can be optionally supplied for each vertical section. The specific section must contain only devices which are UL Listed or are UL recognized com- ponents found suitable for the intended use. All circuit breaker drawout elements are UL Listed.

50	Siemens Electrical Products and Systems	CSI Section 16470
	Specification Guide