WHAT IS SITTING AMPS IN OVER-LOAD RELAY FOR 1PH OR 3PH MOTORS?IF ITS NAME PLATE GIVEN MAX AMPS 10AMPS?

1 Answers  

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Dear Friends, I have a 500KVA transformer supplying whole factory having 3 phase and single phase mixed loads. Power room has ammeters connected via CTs for individual phase. Now I know that readings shown on meter for each phase say R,Y and B are line currents. But when I want to know the total on transformer do I need to add the currents of all three phases readings shown on meter or value for anyone phase will give me the correct power load on transformer for that point of time. 2. If ammeter shows unbalanced readings for R,Y, B phases say 150, 250 and 300 respectively so can I assume that 150A i.e average of 3 will be the 3phase load currents and remaining will be 1phase currents. Please clarify my doubt.

4 Answers  

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what is the difference between UPS & Inverter

7 Answers   HAL,

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WHAT IS DIFFERENCE BETWEEN CAPACITOR AND CAPACITANCE?

0 Answers   Manipal Hospital,

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what about electrical pannel.? What is meant by plc pannel.?

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diff between grounding & earthing

8 Answers   BARC, Mobiserv, NTPC, Tata Steel Limited,

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what is volt drop formula?stm

1 Answers  

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What do you mean by a phase angel of instrument transformer?

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How many types of Transformers are there?

8 Answers  

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How to decide CT & PT ratings for a given transmission line carrying some rated voltage?

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hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com

0 Answers   RRB,

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What is the differentional relay...what is the work of this in power Tx. how it is works..

0 Answers   ABB,

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