Answer / melwyn

to prevent load(motor)of 3 phase from failing of any one
phase.it is connected to 3phase load,when one of phase is
gets failed(due to burned fuse or contactor problem)this
device senses and it will turn of the system

Answer / rakesh kumar c attingal

single phase preventer used to stop the working of 3 phase
motor in the absence of supply in one phase.

Answer / anupam

In 3 phase system..if motor miss one phase..then motor will burn..so spp is used for the safety for motor..if one phase is missed..then the system will tripped or disconnected.. So motor will not burn..

hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

0 Answers   Hyundai,

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how to calculate the magnetizing current of ct ( 800A/1A) for Relay 64

0 Answers   Cadsys,

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standard earthing rating for power line..

0 Answers  

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HOW TO CALICULATE THE LEAD ACID BATTERY AH AND HOW TO FIND THE 1.2KVA UPS BACKUP @ 1000WATTS LOAD?

2 Answers  

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What are the factors considered for the selection of cable?

6 Answers   NPCIL,

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how much allowable resistance that can be difference in motor all coils?

0 Answers  

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What is mean by Sensitive Earth fault & what are the effects

1 Answers   Enteg Technologies,

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what is the contact resistance of sf6 circuit breaker??

2 Answers  

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what happens if the phase sequence of parrlel connected sys will changed & phase displacement

1 Answers  

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Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.

0 Answers  

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how to handle 2500 kva transformar

0 Answers  

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In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers  

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