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New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 1: Introduction
1-2 Safety features
IZM9 circuit breakers and associated drawout equipment
are manufactured with built-in interlocks and safety-related
features. They are provided to reduce hazards to operating
personnel and provide proper operating sequences.
A
B
C
D
IZM97
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 IZM9 nameplate
WARNING
Type IZM9 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 dangerous 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, opera-
tion, and maintenance of this equipment, the following prac-
tices 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 permit-
ted to install or operate the equipment.
2. Always be certain that the primary and secondary cir-
cuits are de-energized or the circuit breaker is removed
to a safe work location before attempting any mainte-
nance.
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 permitted
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.
