In buchholz relay how the top and bottom mercury switches are connected?

In buchholz relay how the top and bottom mercury switches are connected?  
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1 Answer

Answer :

Top mercury switch is connected for alarm and bottom switch for trip.  
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In buchholz relay how the top and bottom mercury switches are connected?

Description : In buchholz relay how the top and bottom mercury switches are connected?

Last Answer : Top mercury switch is connected for alarm and bottom switch for trip.

What Is Buchholz Relay And The Significance Of It In To The transformer ?

Description : What Is Buchholz Relay And The Significance Of It In To The transformer ?

Last Answer : Buchholz Relay is a device which is used for the protection of transformer from its internal faults, it is a gas based relay. whenever any internal fault occurs in a transformer, the Buchholz Relay ... then it stop its sound itself other wise it trips the circuit by its own tripping mechanism.

What is buchholz relay and the significance of it in to the transformer?

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Last Answer : It is located between transformer tank and conservator.

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Description : What is buchholz relay?

Last Answer : It protects the transformer from their internal faults like earth faults, winding short circuit, short circuit between phases, Puncture of bushing etc..

what is Buchholz relay and the significance of it in to the transformer?

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Last Answer : Buchholz relay is a device which is used for the protection of transformer from its internal faults, it is a gas based relay. whenever any internal fault occurs in a transformer, the Buchholz ... circuit then it stop its sound itself otherwise it trips the circuit by its own tripping mechanism.

What are the limitations of Buchholz relay?

Description : What are the limitations of Buchholz relay?

Last Answer : (a) Only fault below the oil level are detected. (b) Mercury switch setting should be very accurate, otherwise even for vibration, there can be a false operation. (c) The relay is of slow operating type, which is unsatisfactory.

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Description : 76 The changes in volume of transformer cooling oil due to variation of atmospeheric temperature during day and night is taken care of by which part of transformer? A. Conservator B. Breather C. Bushings D. Buchholz relay

Last Answer : A. Conservator

Describe the construction and Operation of Buchholz relay with neat labeled diagram.

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Last Answer : Construction of Buchholz Relay: It takes the form of a domed vessel placed in the connecting pipe between the main tank and the conservator. The device has two elements. The upper element ... manner that it senses the sudden violent movement of oil/gas from transformer tank to conservator. 

Explain Buchholz relay with neat labelled diagram.

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Last Answer : Buchholz relay: The relay is located in the path of the oil from transformer tank to conservator. As seen from diagram, the upper mercury switch operates the alarm circuit due to tilting of the ... manner that it senses the sudden violent movement of oil from transformer tank to conservator.

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Description : Buchholz relay is  (1) located in the conservator tank  (2) located in the transformer tank itself  (3) connected in the pipe connecting main tank of transformer and conservator  (4) installed in the circuit breaker

Last Answer : Buchholz relay is connected in the pipe connecting main tank of transformer and conservator 

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Description : Buchholz relay is used as a safety device with respect to which of the following? A) Audio transformers B) Oil filled power transformers C) Air core transformer D) None of these

Last Answer : Buchholz relay is used as a safety device with respect to which of the following? A) Audio transformers B) Oil filled power transformers C) Air core transformer D) None of these

A Buchholz relay can be installed on?

Last Answer : A Buchholz relay can be installed on oil cooled transformers.

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Description : What is the use of Buchholz relay in transformer?

Last Answer : This is a transformer that is used to step up and down current. 

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Last Answer : The buchholz relay is one type of relay which is used in the oil filled power transformerand is for the safety device .

Motor controllers are seldom troubled with grounds because _____________. A. the auxiliary contacts have a high resistance connection B. the contactors and relays are mounted on a nonconducting panel C. the resistor banks are composed of individual series-connected units D. there are separate switches for the motor and the control

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Last Answer : Answer: B

Batteries 'A' and 'B' shown in the illustration are 6 volts each and batteries 'C' and 'D' are 24 volts each. If 'A' were connected in series-opposing to 'C' and 'B' was similarly connected to'D', the result would be _______________. EL-0039 A. 18 volts, negative at the top terminal B. 18 volts, positive at the top terminal C. 30 volts, negative at the bottom terminal D. 30 volts, positive at the bottom terminal

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Last Answer : Answer: Option C

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Where is the fuel pump relay located on a 1988 Mercury Cougar?

Description : Where is the fuel pump relay located on a 1988 Mercury Cougar?

Last Answer : http://www.coolcats.net/help/inertia.html behind back seat, passenger side.

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Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component? A. Wear rubber gloves and boots. B. Use only approved nonconducting tools. C. Ground the case of the machine before beginning any repairs. D. Open the supply circuits and tag the switches.

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Regarding the illustrated electrical schematic, 'S1-P', 'S1-Q', and 'S1-R' represent ____________. EL-0016 A. capacitors B. normally-closed contacts C. normally-open contacts D. normally-closed pushbutton switches

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Description : In the lighting distribution circuit shown in the illustration, if all switches are closed and fuse 'F2' were to open, all lights on branches ____________. EL-0013 A. '1', '2', and '3' would go out B. '1' ... and '3' would burn dimly D. '1' and '3' would go out, while branch '2' would remain lit

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Description : With the selector switches set for R X 10,000 and the leads placed in the proper receptacles, the needle settles on the '150' mark. What is the resistance value between the leads? EL-0047 A. 1500 ohms B. 150,000 ohms C. 1,500,000 ohms D. 1.5 ohms

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A 'dead front' switchboard is one _____________. A. without switches on it B. with insulated switches and no exposed terminals C. without circuit breakers D. without safety hand rails nor rubber mats

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Last Answer : Answer: B

On an engine throttle control system, the auxiliary control circuits are provided with devices to prevent excessive overtravel of the pilot valve by the synchronous motor. These devices are called _________________. A. overlap sensors B. limit switches C. overtravel relays D. proximity switches

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Last Answer : Answer: B

Moisture damage, as a result of condensation occurring inside of the cargo winch master switches, can be reduced by __________________. A. installing a light bulb in the pedestal stand B. coating the switch box internals with epoxy sealer C. venting the switch box regularly D. using strip heaters inside the switch box

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Last Answer : Answer: D

Why Isolation switches are provided along with the circuit breakers?

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Last Answer : Isolation switches are provided for separating the disconnected element from the live portion of the system for the purpose of safety

Why are centrifugal switches provided on many 1-phase Induction motors?

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Last Answer : Centrifugal switches are provided on many 1-phase Induction motors to disconnect the starting / auxiliary winding from the supply when the motor reaches about 70% of its synchronous speed.

Why earth switches are provided in 220 kV bays?

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When testing for blown fuses in a three-phase supply circuit to a motor, you should first ___________________. A. apply the megger across the tops of the line fuses B. apply an ammeter diagonally across the top of the first line fuse and the bottom of the third line fuse C. apply the voltage tester across the bottoms of the line fuses D. ensure the circuit is de-energized, and then use a continuity tester

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The following air gap readings were obtained from a horizontally mounted, bilge pump, induction motor, equipped with sleeve bearings: FWD END-AFT END, Top .045 - .049, Right Side .045 - .047, Left Side .045 - .047, Bottom .045 - .041 Which of the f A. both the aft and foward bearings should be replaced. B. Shims should be removed from the aft bearing. C. The forward bearing should be lowered. D. The aft bearing should be lowered.

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Last Answer : Answer: A