57CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
480V Metal-Enclosed
Switchgear
4
General
RL Breaker
Accessories/Modifications
Type RL circuit breakers feature several
options, including:
쐍 Shunt Trip, (for MO breakers)
쐍 Operation Counter
쐍 Undervoltage Trip Device
쐍 Electrically Operated Interlock
쐍 Automatic Trip Alarm Contact (with or
without Lockout Bell Alarm)
Tripping Actuator
The tripping actuator is a low energy,
flux-shifting device that allows fast action
tripping of the breaker.
Shunt Trip
The shunt trip is used to electrically trip
the circuit breaker from a remote device,
such as pushbutton, switch, or relay. The
shunt trip is standard on all electrically
operated breakers, optional on manually
operated breakers. The shunt trip coil is
designed for a momentary duty cycle.
Thus, an “a” type auxiliary contact switch
is used to interrupt the shunt trip circuit
immediately after the breaker is tripped.
When the coil is energized, the armature
picks up and rotates the trip latch, there-
by tripping the breaker. A compression
spring returns the armature to the normal
position.
480V Metal-Enclosed Switchgear
LV Power Circuit Breaker Trip Unit
Function
Model
III
Table 4.3 Static Trip III Trip Unit Functions
Self-Powered Overcurrent Protection
IIIC IIICP IIICPX
햲
Requires additional compartment mounted devices
and wiring to meet specific application.
햳
Supports optional Breaker Display Unit accessory.
햴
Open command uses alarm relay output and restricts
use for other alarm functions. Close command
requires electrically operated breaker.
햵
Included when ground fault protection specified.
햶
Requires “N” option and neutral current sensor.
햷
Only displayed for four wire systems.
—
✓✓✓✓
RMS Sensing
✓✓✓✓
Switchable Thermal Memory
✓✓✓✓
Ground Fault Protection
opt opt opt opt
opt opt opt opt
LCD Target
✓✓✓✓
Protective Microprocessor Watchdog
✓✓✓✓
Pickup LEDs
Zone Interlocking
햲
(For Short Time and Ground Fault)
opt opt opt opt
Retrofit Universal Mounting Package
opt opt opt
Alarm Relay Output
햲
RS-485 Communications Port
✓✓✓✓
✓✓✓
—
Breaker Display Unit Port
햳
✓✓✓
—
Communications Microprocessor Watchdog
✓✓✓
—
Comm Watch LED
✓✓✓
—
Backup Shadow Protection
✓✓✓
—
—
opt opt opt
opt opt opt
Communication Open/Close/Trip
햲햴
—
Trip Log
✓✓✓
—
Trip Unit Status Indication
✓✓✓
—
Breaker Position Indication
✓✓✓
—
Breaker Operation Counter
✓✓✓
—
Event Log
✓✓✓
—
Phase Current Metering
✓✓✓
—
Ground Current Metering
햵
✓✓✓
—
Neutral Current Metering
햶
—
Min/Max Current Log
✓✓✓
——
Power Metering Functions
✓
✓
✓
——
Min/Max Power Log
✓
———
Extended Protective Relaying
✓
———
Extended Trip Log
✓
Function
Model
Table 4.5
Functions
Static Trip III Metering
Phase Currents
IIIC IIICP
—
—
—
—
—
—
✓✓
Avg Phase Currents
✓✓
✓✓
Neutral Current
햶
opt opt
Phase Voltage
햷
✓
Avg Phase Voltage
햷
✓
Line Voltages
Avg Line Voltages
Ground Current
햵
kW
Power Factor
kW Demand
✓
✓
✓
✓
—
kW Hours
✓
—
kW Hours Reverse
✓
—
kVA
✓
—
kVAR
✓
—
—
kVAR Hours
✓
✓
—
Frequency
✓
Protective Function
Setting
Range
Typical Applications
Motors
Table 4.4 Static Trip IIICPX Protective Relay Functions
Current Unbalance 5–50%
5–50%
60–660V
60–660V
10–2000kW
50.0–70.0 Hz
45.0–60.0 Hz
Generators Mains
—
—
—
—
—
—
—
—
—
—
✓✓
✓✓
Voltage Unbalance
✓✓
✓
Overvoltage
✓
Undervoltage
Reverse Power
✓
Overfrequency
✓
Underfrequency
✓
Shunt Trip
(Amperes)
Seal-In/Inrush
Operating
Voltage
Range
Nominal Control
Voltage
60 Hz
AC
104–127120 1.65/7.7
208–254240 0.71/3.4
DC
28–56 5.45
70–140
48
125 2.76
140–280250 1.85
Table 4.6 Shunt Trip Coil Ratings
England 
Deutschland 
France 
Italia 
Polska 
United Kingdom 
Россия 
Nederland 
España 
Magyarország 
Sverige 
România 
Portugal 
Colombia 
Suomi 
New Zealand 
Česká republika 
Türkiye 
Danmark 
日本