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Is feeder protection relay and ring main unit protection relay same?
No there not same
What the three types of over current protection relay and describe the principles of operation?
over current protection relay
Which relay is used to protect generators and motors?
differential protection relay
What is the use of reactance relay?
reactance relay is used for distance protection of the transmission line....
What is relay coil?
An electrical device, typically incorporating an electromagnet, which is activated by a current or signal in one circuit to open or close another circuit.Based on Characteristic the protection relay can be categorized as-Definite time relaysInverse time relays with definite minimum time(IDMT)Instantaneous relays.IDMT with inst.Stepped characteristic.Programmed switches.Voltage restraint over current relay.Based on of logic the protection relay can be categorized as-Differential.Unbalance.Neutral displacement.Directional.Restricted earth fault.Over fluxing.Distance schemes.Bus bar protection.Reverse power relays.Loss of excitation.Negative phase sequence relays etc.Based on actuating parameter the protection relay can be categorized as-Current relays.Voltage relays.Frequency relays.Power relays etc.Based on application the protection relay can be categorized as-Primary relay.Backup relay.Primary relay or primary protection relay is the first line of power system protection whereas backup relay is operated only when primary relay fails to be operated during fault. Hence backup relay is slower in action than primary relay. Any relay may fail to be operated due to any of the following reasons,The protective relay itself is defective.DC Trip voltage supply to the relay is unavailable.Trip lead from relay panel to circuit breaker is disconnected.Trip coil in the circuit breaker is disconnected or defective.Current or voltage signals from CT or PT respectively is unavailable.As because backup relay operates only when primary relay fails, backup protection relay should not have anything common with primary protection relay.Some examples of Mechanical Relay are-Thermal(a) OT trip (Oil Temperature Trip) (b) WT trip (Winding Temperature Trip) (C) Bearing temp trip etc.(a) Buchholz (b) OSR (c) PRV (d) Water level Controls etc.Float typePressure switches.Mechanical interlocks.Pole discrepancy relay.
Is feeder protection relay and ring main unit protection relay same?
No there not same
What is the factor of 32r-48s-80?
16
What the three types of over current protection relay and describe the principles of operation?
over current protection relay
What is LBB protection Relay?
LBB is local breaker protection
How you factor the expression 32r-12?
4(8r - 3)
Which relay is used to protect generators and motors?
differential protection relay
What is the use of reactance relay?
reactance relay is used for distance protection of the transmission line....
Is Size 32R is same that size 11?
No, Size 32R and Size 11 are not the same and refer to different measurements. Size 32R typically indicates a waist measurement of 32 inches and a regular length for pants, while Size 11 usually refers to shoe size. These sizes are used in different contexts (clothing vs. footwear) and are not directly comparable.
What is 50G protection relay mean?
50 is the ANSI device number for an instantaneous overcurrent relay. The G suffix stands for "ground." A 50G protection relay trips the circuit breaker without time delay when it detects a ground fault on the circuit.
What is the number on the Reverse Voltage Protection Relay for a Ford Contour '97?
On a 1997 Ford Contour : The Reverse Voltage Protection relay location is marked ( D1 )
What is the inseam on a pair of men's pants that are marked 32R?
Type your answer here... length of pants
32r size what is it british?
In British sizing, a 32R typically refers to a men's suit or jacket size, with "32" indicating the chest measurement in inches and "R" standing for "Regular," which denotes the length of the jacket. A Regular size is generally suited for individuals of average height, typically around 5'8" to 6'0". Therefore, a 32R jacket is designed for someone with a 32-inch chest and an average torso length.
