SSC JE – Electrical Questions
1.The crest factor of alternating current is…..? Peak value / RMS value 2. A 0 to 200 V volt meter has a guaranteed accuracy of 1% of full scale reading. The voltage measured by...
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Rod Gap Lightning Arrester
Lightning arrestor is connected between the line and earth. It is a protective device which conducts the high voltage surges (due to both direct and indirect stroke) on the power system to the ground...
Protection against Lightning
Lightning surges may cause serious damage to the equipments in the power system, either by direct or by strokes on the transmission lines that reach the equipment as travelling wave. It is necessary to...
Over Voltage / Voltage Surge
A sudden rise in voltage for a very short duration on the power system is known as voltage surge.The overvoltage on a power system may be broadly divided into two main categories. Internal Causes...
BUS BAR PROTECTION
Busbars in the generating stations and sub stations form a link between the incoming and outgoing circuits.If a fault occurs in bus bar create damage and disruption of supply.The bus bar faults are generally...
Differential Protection of Transformer / Merz-price method
Differential protection system or Merz-Price circulating current method Differential protection of a 3 phase delta/delta transformer used for the protection against phase to earth and phase to phase fault. Note that CTs on the...
SSC JE-EEE 2020-21 Notification Out.
SSC has invited applications for the Junior Engineer (Electrical) post for various Ministries/ Departments/ Organizations in the Government of India. The official notification for SSC Junior Engineer (Electrical ) Examination-2020-21 has been released on 1st October, 2020....
KPSC – Electrician/Skilled Assistant/ Technician Exam on 30/09/2020 – Questions with Answers
1. Power factor of purely resistive circuit is…? Unity 2. The capacitive reactance is measured in ….? Ohm 3. Permalloy is an alloy containing…? Nickel and iron 4. For sinusoidal current crest factor is…?...
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