The Eaton Industries NZMB S is a power circuit breaker designed with a nominal continuous current Iu of 50A and a nominal cut-off power Icu of 53kA at 400. It offers an adjustable overcurrent protection range of 300-500A and an immediate short circuit range of 300-500A. The device features screw connection for the main current circuit and is structured with three poles. This series NZM..-S circuit breakers cover a wide range of applications with just four compact sizes, appropriate for the IEC market. They offer flexible mounting due to modular function groups and come with a magnetic short-circuit release in conjunction with an overload relay. They also support short-circuit release without overload trip. It’s important to note that these circuit breakers fulfill all requirements of the switching category AC-3.
Specifications
Overload release current setting (A) : 0 A to 0 A
Adjustment range undelayed short-circuit release (A) : 8 A to 14 A
With thermal protection : No
Phase failure sensitive : No
Switch off technique : Magnetic
Rated operating voltage (V) : 440 V to 440 V
Rated permanent current Iu (A) : 50
Rated operation power at AC-3, 230 V (kW) : 15
Rated operation power at AC-3, 400 V (kW) : 22
Type of electrical connection of main circuit : Other
Type of control element : Rocker lever
Device construction : Built-in device fixed built-in technique
With integrated auxiliary switch : No
With integrated under voltage release : No
Number of poles : 3
Rated short-circuit breaking capacity lcu at 400 V, AC (kA) : 18.5
Degree of protection (IP) : IP20
Height (mm) : 145
Width (mm) : 90
Depth (mm) : 88
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