What is different between Metering CTs and Protection CTs?
- 4 Answers
- 13590 Views
- I also Faced
- E-Mail Answers
Answer Posted / rk
metering cts are desined not to record fault current i.e.
if ctr is Ex. 200/5 at a fault current of 2000amp the
secondary current would be still 5 amps not 50amp. reverse
is in prot cts it will serve 50amps if its ALF permits .
Metring CT are like acc class 0.5 etc Protn CTs have 5P10,
5P20etc i.e. it will maintain its ratio up to 20times the
the primary current (200amp)of ct.
| Is This Answer Correct ? | 13 Yes | 4 No |
Post New Answer View All Answers
what happened when we supply a dc current in dc motor?? can it worked properly?
how to find 5 kilo meter long under ground 33 kv cable fault location if IR VALUE shows 0.05 M ohm @5000 volt.and cable fault locator shows some time fault distance 3 kilo meter ,3.7 kilo meter and some time 1 kilo meter? now how to find the fault location that where is leakage. note--it is tested with 5000 kv megger and insulation resistance is 0.05 M ohm. and some time 0.03 M ohm comes.
I have a 380 KVA DG set. How can i find out 1. My Fuel Consumption per hr ? 2. Electricity produced in 1 Hr. ? 3. If load varies then how does it affect fuel consumption & electricity produced ? Please HELP !!! Really need an answer.
when generator short circuit condition, the current how dissipates. or at short circuit voltage not available then current how can flow?
What will happen if a dc source is given to a tubelight. Will it work or wont it work....
what is the role of transistor in Circuit?
for a 500 KVA connected load, I calculated 30% of capactor for power correction. Even after using 225 KVR capactor PF is not improving. What could be reason for low Phase correction factor?
if 3400kw slipring motor rotor shorting done and motor started on mv drive ,what will be the rotor shoring current
Greeting to all members, How to calculate spill current when we have different ratio CT and Class for REF(Low Imp) I have 500/1A 5P20 @line side n 400/1A CL.X @ Neutral.
Dear all, how we select the cable size according to current with or without including different correction factor , is there any direct method for sizing of cable...
What is the distance between body earthing and neutral earthing.?
What does the term “voltage regulation” means?
what is KA rating and how can we choose switchgears on applications
I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?
I am inpecting a 10kVA UPS what tests should i do and should i observe?
