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WRONG_POLARITY_PROTECTION

2016-09-12 06:24  
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WRONG_POLARITY_PROTECTION
Provides built-in protection of transistors in inverter from incorrect polarity of connection to 12-v battery. Used between inverter and battery. Green bulb G lights and relay operates for correct polarity. With wrong polarity, relay does not operate and red bulb R comes on to indicate error.-J. J. Pirch, Inverter Control, EEE, 11:3, p 44.