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IZM63 / IN63 low voltage air circuit breaker
MN013014EN May 2021 www.eaton.com.cn
Section 1: Introduction
1-2 Safety features
IZM63 / IN63 circuit breakers and associated drawout equip-
ment are manufactured with built-in interlocks and safety-re-
lated features. They are provided to reduce hazards to oper-
ating personnel and provide proper operating sequences.
A
B
C
D
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IZM63H3-V63W-1
6300A
A) Low Voltage Air Circuit Breaker Family Name
B) Breaker Family Size in Amperes
C) Interrupting Capacity Rating
D) Factory Equipped Accessories
Figure 1-2 Typical IZM63 / IN63 nameplate
WARNING
Type IZM63 / IN63 circuit breakers are robust and are
provided with safety features. nevertheless, the voltages,
currents, and power levels available in and around this
equipment when it is in operation are extremely danger-
ous and could be fatal. under no circumstances should
interlocks and other safety features be made inoperative,
as this may result in death, bodily injury, or property
damage.
1-3 Safe practices
To protect personnel associated with the installation,
operation, and maintenance of this equipment, the following
practices must be followed:
1. Only qualified electrical personnel familiar with the
equipment, its operation, and the associated haz-
ards should be permitted to work on the equipment.
Additionally, only qualified personnel should be
permitted to install or operate the equipment.
2. Always be certain that the primary and secondary
circuits are de-energized or the circuit breaker is
removed to a safe work location before attempting any
maintenance.
3. For maximum safety, only insert a completely assem-
bled breaker into an energized cell.
4. Always ensure that drawout circuit breakers are in one
of their designed cell positions, such as CONNECT,
TEST, DISCONNECT, or REMOVE. A circuit breaker per-
mitted to remain in an intermediate position could result
in control circuits being improperly connected, resulting
in electrical failures.
1-4 Qualified personnel
For the purpose of operating and maintaining low voltage air
circuit breakers, a person should not be considered qualified
if the individual is not thoroughly trained in the operation of
the circuit breaker and how it interfaces with the assembly
in which it is used.
For the purpose of installing and inspecting circuit breakers
and their associated assembly, a qualified person should
also be trained with respect to the hazards inherent to
working with electricity and the proper way to perform such
work. The individual should be able to de-energize, clear, and
tag circuits in accordance with established safety practices.
