Moeller - Overview - IZM circuit-breakers

IZM circuit-breakers [t-head2-pg]

The IZM offers a circuit-breaker for use in the high rated current range from 630 A. IZM circuit-breakers and IN switch-disconnectors offer the main switch isolating characteristics in accordance with IEC/EN 60204-1 as they are lockable in the OFF position. They can therefore be used as supply disconnection devices. IZM circuit-breakers are built and tested in accordance with IEC/EN 60947.

Depending on the type of equipment to be protected, main application areas can be implemented by different settings of the trip electronics:

System protection,

Motor protection,

Transformer protection,

Generator protection.

IZM devices offer different tripping electronics, for applications ranging from simple system protection with overload and short-circuit release to digital releases with a graphical display and the possibility of creating selective networks.

They can be adapted to a wide range of requirements by means of a comprehensive range of mounted accessories such as auxiliary contacts, trip-indicating auxiliary contacts, motor operators or voltage releases, fixed-mounted or withdrawable units.

With their communication-capability, the IZM circuit-breakers open up new possibilities in power distribution. Important information can be passed on, collected and evaluated, also for preventative maintenance. They thus increase the transparency of the system. For example, by enabling rapid intervention in processes, system downtimes can be reduced or even prevented.

The basic selection criteria of an IZM circuit-breaker are:

Max. short-circuit current I_kmax,

Rated operational current I_n,

Ambient temperature,

3 or 4-pole design,

Protective function,

Min. short-circuit current.

Detailed information about the IZM circuit-breaker is provided in AWB1230-1407.


IZM1		IZM2		IZM3