molded case circuit breakers - Eaton Canada

6
Accessories
MOLDED CASE CIRCUIT BREAKERS
General Information
BREAKER IDENTIFICATION
Nameplate Data
A circuit breaker is identified by data
found on the nameplate.
This includes:
Catalog Number
Shop Order Number
Style Number
Amperage
Number of Poles
Voltage Class
Temperature Rating
In most instances, the Catalog Number,
Style Number, or Shop Order Number will
supply enough information to identify the
circuit breaker. However, it is always advisable
to obtain all data from the nameplate
to facilitate identification.
A Catalog Number begins with a series of
letters followed by numbers that identify:
Circuit Breaker Type
Number of Poles
Maximum Amperage
Example: Catalog Number F3020
indicates a Type F Circuit
Breaker, 3 Poles,
20 Amperes
A Shop Order Number begins with one or
two numbers followed by a single letter
and four additional numbers.
A Shop Order Number is listed in place of
a Catalog Number and indicates the circuit
breaker was modified at the factory, i.e.,
addition of a shunt trip, special calibration,
etc. Every Shop Order Number must be researched
with the factory to properly
identify modifications. Call your
Cutler-Hammer Field Sales Office for this
information.
Example: 70E2121
NOTE: Cutler-Hammer does not recommend
replacing a circuit breaker
identified by a Shop Order Number
with a standard ”off-the-shelf“
circuit breaker without first identifying
the modifications. They may
be critical to safe and reliable
operation.
Most circuit breaker accessories are
mounted internally and are not visible
with a quick inspection. However, since
many accessories rely on or supply an
external signal, there may be electrical
leads exiting the circuit breaker case.
Inspect for these leads when obtaining full
descriptive information for circuit breaker
replacement. Examples of common
accessories:
➊ Labels updated in 1997.
Shunt Trip
Pre-Series C Breaker with Original Label➊
Series C Breaker with Original Label➊
New Label for Typical SELTRONIC MCCB
Used to remotely trip the circuit breaker
using an electrical signal. Typically two
wires extend through the case.
Undervoltage Release (UVR)
Trips the circuit breaker when voltage
drops below a specified percentage of coil
voltage (typically 70%). Typically two
wires extend through the case.
Auxiliary Switch
Provides remote indication of the circuit
breaker status (open/closed). Typically
three wires extend through case in a
1-pole 1A/1B application.
Alarm Lockout Switch
For remote indication of an automatic trip
operation. Typically two or three wires
extend through the case.
March 2001