The Eaton Industries MCCB Circuit-Breaker NZM3 is a three-pole device with a switching capacity of 400/415V, 50Hz and an interrupting capacity (Icu) of 36kA. Its nominal continuous current (In = Iu) is rated at 320A and can be adjusted between 250 – 320A for overload protection. The device also offers an un-delayed short circuit adjustment range from 1920 – 3200A. It is designed for fixed installations and utilizes a screw connection for secure fitting. The circuit breaker is compliant with IEC standards and primarily serves for system and cable protection.
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) : 36
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 3200 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 : 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 : 3
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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