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Auxiliary relay used for standby protection of electrical circuit when main relay fails to operate.
PLA relay used for feedback purpose.its work like a NO NC .

where used impendence relay?

3 Answers  

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If i am running of spindle at 2000rpm ,but How to spindle stop at the second I am resetting the machine in CNC machines

1 Answers  

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What is mean by STUB protection?

1 Answers  

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1 Kva = How many KW

3 Answers   Reliance,

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How to measure 20 hp motor resitance

1 Answers  

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what is auto transformer?

4 Answers  

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what is the need of starter in tube light and what type of starter is used in that?

1 Answers   Sedemac, Sepco,

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why doesnt the back emf hold the speed of unloaded series motor?

1 Answers  

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1.ZEBRA conductor(large size) 2.KUNDHA conductor( small size ) 3.panther conductor(very small ) 4.lepard conductor (very very small)

1 Answers  

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What is the minimum distance between taransformer (say 2000 kva)and its earth pit?

2 Answers   Bhel,

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What is LT Breaker Panel?

1 Answers  

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what is the interrelation between voltage current torgue speed and magnetic flux in case of different types of electric motors

1 Answers  

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