In an ACB shunt trip coil and undervoltage coil operated normally( breaker open and charged). But closing coil not operating untill manually discharge and recharging. Any help.

1751

What is Phase to Phase clearance for 800V System Operating Voltage as per IEC61439

1041

What is the basic principle of operation of alternators/dc generators?

1104

what is RFID? thire application;

2041

Briefing the effects of ASR and ACR of a double closed-loop speed regulating system.

2247

how we calculate the dick for a pole?

2185

How many lightning arrestors to be installed on 50MX60MX10M building and is there any formular for that?

2001

hr round

2139

Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?

2170

I WANT HOW CALCULATE TO CABLE FOR WELDING PLANT ?

1832

Some times to change of DOR of a motor, interchange of R & B is not effected and RYB take same current, but interchange of R&Y is effected ie change the DOR. My doubt is what is the problem in motor and how it is happen.

2003

how to Select its CORE in electrical cables based on its applications? or Application of various types of electrical cable based on it CORE?

3258

How 3 phase invertor works?

2072

How to calibrate or test an LT Air Circuit breaker 440 volts, 35 KA, 800 Amps ?

1928

what is the prinsiple of dc motor and construction and working ,application of dc motor.

1960