3-4.5 Trip Actuator; 3-4.6 Fixed High Instantaneous Non-Adjustable Trip; 3-4.7 Non-Automatic Device - Eaton IZM32 Instruction Manual

Frame rating modules installed on series
IZM32 / IN32 air circuit breakers with PXR are perma-
nent and SHOULD NEVER BE REMOVED. The frame
rating module battery cover with printed I
not be changed without proper reprogramming of the
trip unit. The I rating programmed from the factory
n
is displayed in the lower left hand corner in the LCD
screen whenever power is applied to the trip unit. The
I displayed on the LCD reflects the actual I
n
the breaker, while the value on the battery cover is for
reference only when the LCD is not powered. The I
ing displayed on the LCD screen and I
the frame rating module battery cover MUST ALWAYS
MATCH.

3-4.5 Trip actuator

The low-energy trip actuator is a small electromagnetic
device that provides the necessary mechanical force
to initiate the tripping action of the circuit breaker. The
electronic trip unit provides a pulse to the coil of the
trip actuator, allowing the mechanical tripping action to
take place. The trip actuator is reset by the operating
mechanism.
3-4.6 Fixed high instantaneous non-adjustable
trip
Series IZM32 circuit breakers have a fixed instantaneous
non-adjustable setting. This fixed instantaneous trip will
initiate a trip at a high current peak which depends on the
1 3 5 7
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2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95
50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96
Figure 3-10 Secondary connector top view
rating should
n
rating of
n
rating printed on
n
9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47
IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com
Section 3: Circuit breaker description and operation
circuit breaker type and rating. This setting is always active,
regardless of the instantaneous setting.

3-4.7 Non-automatic device

Series IZM32 / IN32 is available in a non-automatic
configuration. It is derived from the corresponding IZM32
/ IN32 automatic breaker but does not include the trip
unit, Rogowski coil type current sensors, and the high
instantaneous trip feature. The overall dimensions and
rat-
the capability of mounting most accessory items are
n
maintained. Non-automatic device are tested in keeping
with IEC 60947-2 requirements.
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