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Electronic Motor Protection Relays

NHP Electrical Engineering Products specialises in industrial switchgear and automation, bringing together leading products, systems and solutions from key application categories - motor control, power distribution, hazardous location, sensing and detection, ...
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250 series protection relays can be used as a phase failure relay providing the regenerated open phase voltage is less than 70% of the nominal supply voltage
Supplier news
20/09/11 - 250 series protection relays, now supplied by Crompton Instruments (Australia), are designed to monitor the correct phase rotation or sequence of three-phase, three or four-wire supply systems.

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