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)
a
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
c
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
b
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
b
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
c
85/65
2500 IZM97, IZM32 65 65/50
2500 IZM97, IZM32 85 85/65
2500 IZM97, IZM32 100
b
85/65
3200 IZM97, IZM32 65 65/50
3200 IZM97, IZM32 85 85/65
3200 IZM97, IZM32 100
b
100/65
4000 IZM97, IZME40
c
65 —
4000 IZM97, IZME40
c
85 —
4000 IZM99, IZM63
c
100
b
—
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)