The Eaton Industries NZMB A is a circuit-breaker with four poles, featuring a switching capacity of 400/415 V 50 Hz (Icu): 25 kA and a rated current equal to the rated uninterrupted current (In = Iu) of 250 A. It is designed for system and cable protection and conforms to IEC standards. This device is of a fixed installation type and is characterized by a screw connection. The overload protection setting range is between 200 – 250A, alongside an undelayed short-circuit setting range of 6 – 10A.
Specifications
Rated permanent current Iu (A) : 250
Rated voltage (V) : 440 V to 440 V
Rated short-circuit breaking capacity lcu at 400 V, 50 Hz (kA) : 25
Overload release current setting (A) : 200 A to 250 A
Adjustment range short-term delayed short-circuit release (A) : 0 A to 0 A
Adjustment range undelayed short-circuit release (A) : 6 A to 10 A
Integrated earth fault protection : No
Type of electrical connection of main circuit : Screw connection
Device construction : Built-in device fixed built-in technique
Suitable for DIN rail (top hat rail) mounting : No
DIN rail (top hat rail) mounting optional : Yes
Number of auxiliary contacts as normally closed contact : 0
Number of auxiliary contacts as normally open contact : 0
Number of auxiliary contacts as change-over contact : 0
With switched-off indicator : No
With integrated under voltage release : No
Number of poles : 4
Position of connection for main current circuit : Front side
Type of control element : Rocker lever
Complete device with protection unit : Yes
Motor drive integrated : No
Motor drive optional : Yes
Degree of protection (IP) : IP20
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