If you have an earth with pilecap then your resistance is
really low. why and how?
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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million
an ac induction motor gets overheated when operated at a low frequency of 25 hz a instead of 50 hz. reason?
A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?
for a 11kv transmission line what capacity of CTs & PTs are required?
What is the armature mmf in a D.C machine?
Why high Voltages come in multiple of 11, like 11 KV, 33KV, 66 KV, 132 KV etc.
i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?
Why we cant store an ac power. If we coo store in which device we can?
11kv alternator commissioning test?
what is upper impedance and lower impedance of a distance relay
A circuit breaker on detecting fault will a. Open b. Close c. Open and trigger the alarm
What is the use of oil in transformers?