The Eaton Industries NZMB S power circuit breaker is a versatile tool suitable for global use, covering all applications in just four compact sizes. It features a nominal continuous current Iu of 50A and a nominal cut-off capability Icu at 400 53kA. It has an adjustable overload protection range of 300 – 500A and an adjustable instantaneous short circuit range of 300 – 500A. The main power circuit connection method is screw connection and it is built with 3 poles. The device also comes with magnetic short-circuit release in connection with an overload relay and a short-circuit release lacking overload trip. It complies with both UL/CSA and IEC regulations, as indicated on the rating plate.
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 : Screw connection
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) : 195
Width (mm) : 105
Depth (mm) : 149
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