engineering recuitment DRDO Technician A 2022 Mock Test Series (Tier I) Electrician and Wireman Power Systems Relays and Voltage Regulators
The protective relay is specified as ‘4PDT’ contact what is the full form of it?
1
4 Point Double Time delay contact
2
4 Pole Double Throw contact
3
4 Package Double Throw contact
4
4 Pole Double Time delay contact