Trouble shooting of QOP safety relay

In this video you will learn about QOP -1 / 2 relay and trouble shooting of QOP -1 / 2 relay dropping
Three Phase Electric Locomotive :
• Total knowledge of VCD...
Conventional Locomotive :
• DJ Control circuit... ...
For railway departmental exam related videos refer to the following playlist :-
• Exam related

[@ks-cz7ek]

Bahat accha video bante hai sir aap apki awaj clear hai bahat bahat knowledge hai aap ke paas thanku hum jaise naye convertion batch ki bahat maddad hoti hai

[@user-if6ei2gp2f]

Very good sir.

[@vishnumanipatel4909]

Nice sir.. Keep it up. 🎉

[@surendrababu5953]

Thanks sir🎉

[@classicdays2271]

Nice sir🙏🙏

[@JosnaMonse-g5m]

Lewis Barbara Lopez Margaret Walker Jason

[@user-if6ei2gp2f]

Sir,battery voltage110v hota hai ,50v dc keon kaha gaya hai. If,line contactor is closed and traction is not taken QOp will drop or not.

[@Knowledgegain82]

Agar negative side se hai to parmanent drop rahega..