The Eaton Industries MCCB power circuit breaker, NZM3, features three poles and a switching capacity of 400/415 V 50 Hz, with an interruption capacity (Icu) of 36 kA. It has a rated current, also referred to as rated uninterrupted current (In = Iu), of 500 A. This particular model is designed for fixed installation and uses screw connections. Certified to IEC standards, it’s primarily used for system and cable protection. Its major function is maintaining electrical safety, ensuring impeccable power flow.
Specifications
Rated permanent current Iu (A) : 500
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) : 400 A to 500 A
Adjustment range short-term delayed short-circuit release (A) : 0 A to 0 A
Adjustment range undelayed short-circuit release (A) : 3000 A to 5000 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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