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7
10/09 AWB1230-1605
Effective October 2009
Operation and maintenance of
IZM low voltage air circuit breakers
MOELLER
www.moeller.net/de/support
Table 1. IZM Circuit Breaker Ratings
Maximum amperes
Breaker Designation
i
cs
= i
cu
(ka)
i
cw
1s/3s (ka)
800
IZM93, IZM20
50
50/NA
800
IZM93, IZM20
65
65/40
800
IZM97, IZM32
40
40/NA
800
IZM97, IZM32
65
65/50
800
IZM97, IZM32
85
85/65
800
IZM97, IZM32
100
85/65
1250
IZM93, IZM20
50
50/NA
1250
IZM93, IZM20
65
65/40
1250
IZM97, IZM32
40
40/NA
1250
IZM97, IZM32
65
65/50
1250
IZM97, IZM32
85
85/65
1250
IZM97, IZM32
100
85/65
1600
IZM93, IZM20
50
50/NA
1600
IZM93, IZM20
65
65/40
1600
IZM97, IZM32
65
65/50
1600
IZM97, IZM32
85
85/65
1600
IZM97, IZM32
100
85/65
2000
IZM93, IZM20
50
50/30
2000
IZM93, IZM20
65
65/40
2000
IZM97, IZM32
65
65/50
2000
IZM97, IZM32
85
85/65
2000
IZM97, IZM32
100
85/65
2500
IZM97, IZM32
65
65/50
2500
IZM97, IZM32
85
85/65
2500
IZM97, IZM32
100
85/65
3200
IZM97, IZM32
65
65/50
3200
IZM97, IZM32
85
85/65
3200
IZM97, IZM32
100
100/65
4000
IZM97, IZME40
65
—
4000
IZM97, IZME40
85
—
4000
IZM99, IZM63
100
—
4000
IZM99, IZM63
65
65/NA
4000
IZM99, IZM63
85
85/65
4000
IZM99, IZM63
100
100/85
5000
IZM99, IZM63
85
85/65
5000
IZM99, IZM63
100
100/85
6300
IZM99, IZM63
85
85/65
6300
IZM99, IZM63
100
100/85
a
All ratings at 690 Vac.
b
I
cu
= I
cs
= 85 kA at 690 Vac. I
cu
= I
cs
= 100 kA at 440 Vac.
c
Standard width breaker (not IZM99 or IZM63).
Figure 2. Typical IZM Nameplate
Warning
TYPE iZM 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.
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 hazards 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 assembled 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.
(A) Low Voltage Air Circuit Breaker Family Name
(B) Breaker Family Size in Amperes
(C) Interrupting Capacity Rating
(D) Factory Equipped Accessories
(A)
(B)
(C)
(D)