Siemens 480V 사용자 설명서
480V Metal-Enclosed Switchgear
Construction Details
General
52
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
480V Metal-Enclosed
Switchgear
4
Main and Ground Bus
The standard main bus is silver-plated
copper. Welded aluminum is also avail-
able. Provisions for future extension of
aluminum main bus conductors include
tin plated joints with high tensile strength
steel hardware. Tin-plated copper bus is
optionally available.
The standard main bus is silver-plated
copper. Welded aluminum is also avail-
able. Provisions for future extension of
aluminum main bus conductors include
tin plated joints with high tensile strength
steel hardware. Tin-plated copper bus is
optionally available.
The main three-phase horizontal bus is
arranged vertically one phase above the
other with edge-to-edge alignment to
provide high, short circuit strength.
Insulated main and vertical bus are
optional.
arranged vertically one phase above the
other with edge-to-edge alignment to
provide high, short circuit strength.
Insulated main and vertical bus are
optional.
Main bus ratings available are 1600,
2000, 3200, 4000, or 5000 amperes con-
tinuous current. A neutral bus is fur-
nished when specified, and can be rated
1600, 2000, 3200, 4000 or 5000 amperes
continuous current.
2000, 3200, 4000, or 5000 amperes con-
tinuous current. A neutral bus is fur-
nished when specified, and can be rated
1600, 2000, 3200, 4000 or 5000 amperes
continuous current.
A standard copper ground bus extends
through all sections. A cable lug can be
mounted to the ground bus in each
section.
through all sections. A cable lug can be
mounted to the ground bus in each
section.
Minimum bus bracing is 65,000 amperes
RMS symmetrical. Higher symmetrical
bracings are available based on the low-
est breaker short circuit rating in the
group.
RMS symmetrical. Higher symmetrical
bracings are available based on the low-
est breaker short circuit rating in the
group.
Load side runbacks for feeder circuits are
one-piece copper construction, are insu-
lated with sleeve tubing in the main bus
area, and are supported by high-strength,
glass polyester moldings.
one-piece copper construction, are insu-
lated with sleeve tubing in the main bus
area, and are supported by high-strength,
glass polyester moldings.
Control Wiring
Standard secondary and control wiring is
#14 AWG extra-flexible, stranded copper
type SIS. Terminations are made with
compression-type, insulated terminals.
Standard secondary and control wiring is
#14 AWG extra-flexible, stranded copper
type SIS. Terminations are made with
compression-type, insulated terminals.
For devices not having screw-type termi-
nals, tab-type disconnects are used.
nals, tab-type disconnects are used.
Insulation
The insulation used is Pyro-Shield, a fiber-
glass-reinforced polyester material that
has high impact strength and low mois-
ture absorption. Other features include
high flame retardance, high resistance to
chemical fumes, and long life at high
temperatures.
The insulation used is Pyro-Shield, a fiber-
glass-reinforced polyester material that
has high impact strength and low mois-
ture absorption. Other features include
high flame retardance, high resistance to
chemical fumes, and long life at high
temperatures.
Circuit Breaker Compartments
Typical circuit breaker compartments
include primary disconnects, ground dis-
connect, drawout rails, and associated
interlocks, and secondary disconnects, if
appropriate. Telescoping drawout rails
allow the breaker to be withdrawn from
the compartment without additional
extensions or adapters. Compartments
for electrically-operated circuit breakers
include secondary disconnects and con-
trol circuit fuses. Up to three current
transformers for metering or relaying can
be mounted in each compartment.
Typical circuit breaker compartments
include primary disconnects, ground dis-
connect, drawout rails, and associated
interlocks, and secondary disconnects, if
appropriate. Telescoping drawout rails
allow the breaker to be withdrawn from
the compartment without additional
extensions or adapters. Compartments
for electrically-operated circuit breakers
include secondary disconnects and con-
trol circuit fuses. Up to three current
transformers for metering or relaying can
be mounted in each compartment.
Circuit breaker compartment front panels
can be used to hold a variety of auxiliary
devices such as breaker control switch-
es, ammeters, and test blocks.
can be used to hold a variety of auxiliary
devices such as breaker control switch-
es, ammeters, and test blocks.
햲
Control Circuit Fuses
햳
Ground Disconnect
햴
Secondary Disconnect
햵
Front Panel Devices
햶
Primary Disconnect
햷
TOC Switch Operator
햸
Interference Interlock
햹
MOC Switch Operator
햺
Space Heater
햻
Drawout Rails
Circuit Breaker Cell Interior