This Eaton Industries MCCB circuit-breaker model NZM3 features 4 poles with a 400/415 V 50 Hz switching capacity (Icu): 50kA and a rated current equivalent to rated uninterrupted current (In=Iu): 320 A. It comes in a withdrawable installation type with a screw connection and is designed according to IEC standards. Its primary protective function is for system and cable protection. The breaker’s nominal operating continual current is 320A with a voltage of 690V, and a nominal cut-off capacity Icu at 400 of 50kA. Overload protection adjustable range is between 250-320A, while the un-delayed short circuit range stands between 1920-19200A.
Specifications
Rated permanent current Iu (A) : 320
Rated voltage (V) : 690 V to 690 V
Rated short-circuit breaking capacity lcu at 400 V, 50 Hz (kA) : 50
Overload release current setting (A) : 250 A to 320 A
Adjustment range short-term delayed short-circuit release (A) : 0 A to 0 A
Adjustment range undelayed short-circuit release (A) : 1920 A to 19200 A
Integrated earth fault protection : No
Type of electrical connection of main circuit : Screw connection
Device construction : Built-in device slide-in technique (withdrawable)
Suitable for DIN rail (top hat rail) mounting : No
DIN rail (top hat rail) mounting optional : No
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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