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New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 4: Accessory devices
Figure 1. Step 1 and 2
Step 5: Connect the shunt trip to the disconnect switch
using a connector.
Step 6: Connect the wires to Position 89 and 90 marked in
on the secondary terminal block.
Step 7: To install the second shunt trip, repeat Step 3, 4 and
5. Connect the wires to Position 93 and 94 marked on the
secondary terminal block.
Step 8: Re-install the front cover by following the procedure
in Step 1.
Figure 4. Step 5
Figure 5. Step 6
Figure 6. Step 7
IZM9 low voltage circuit breaker closing coil
assembly
WARNING
(1) Only qualified electrical personnel should be permit-
ted to work on the equipment.
(2) Always de-energize primary and secondary circuits
if a circuit breaker cannot be removed to a safe work
location.
(3) Drawout circuit breakers should be levered (racked)
out to the DISCONNECT position.
(4) All circuit breakers should be switched to the OFF
position and mechanism springs discharged.
Failure to follow these steps for all procedures described
in this instruction leaflet could result in death, bodily
injury, or property damage.
Section 1: General information
A spring release is recommended on electrically operated
circuit breakers, although it is an optional device. It remotely
closes the circuit breaker when the coil is energized by a
voltage input. When a latch check switch is installed, the
closing spring must be fully charged and the trip latch reset
(not held in the tripped position) for the SR to operate. If
these two conditions are not met, the close signal will be
ignored until it is removed and re-applied.
Section 2: Installation of closing coil
Proceed with the following 4 steps to install the closing coil:
Step1: To remove the front cover from the breaker, remove
the hexagonal mounting screws (four for 3 pole breakers
and six for 4 pole breakers) from the circuit breaker’s front
cover using a 10 mm socket wrench. Then pull down on the
charging handle and retain it at 45° angle to remove the front
cover.
Step 2: Attach the corresponding label under “Accessories”
on the cover nameplate.
B11 B10
Connector
Shunt trip
disconnect
switch
Mounting panel
Shunt trip
Secondary terminal block
Mounting panel
Installation
position of the
second shunt
trip disconnect
switch
Installation
position of the
first shunt trip
Installation
position of the
2nd shunt trip
Installation
position of the
first shunt trip
disconnect
switch
Mounting panel
Screw
labeling