What are the different protection systems used to protect the transformer inte

Categories >> Engineering >> Electrical Engineering
Suggest New Category

What are the different protection systems used to protect
the transformer internally and externally?

Question Posted / ravi

16 Answers
44927 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

What are the different protection systems used to protect the transformer internally and externall..

Answer / manoj kumar sankaralingam

i)Differential protection
ii)Restricted earth fault protection
iii)Buchholz relay
iv)Oil temperature indicator
v)Winding temperature indicator

Is This Answer Correct ?

1 Yes

0 No

What are the different protection systems used to protect the transformer internally and externall..

Answer / karthikeyan

Bucholz relay
under voltage relay
over current relay
inverse time current over relay
pressure relay

Is This Answer Correct ?

0 Yes

0 No

What are the different protection systems used to protect the transformer internally and externall..

Answer / viren89desai@yahoo.co.in

https://library.e.abb.com/public/4381d7d675f760cdc12575550081d599/AG03-5005E_en_Power_transformer_protection.pdf

Is This Answer Correct ?

0 Yes

0 No

What are the different protection systems used to protect the transformer internally and externall..

Answer / vinod g

Transformer protection
1) protection provided in the transformer are
A) buchholz relay for both main and oltc (ansi no 63)(alarm and trip)
B) winding temperature (wti) 49(alarm and trip)
C) oil temperature (oti) 49 (alarm and trip)
D) explosion vent or prv
e) Magnetic oil level gauge for alarm
f) Fire protection (Mulsifire system)
g) Lightning Arrester provided in both HV and LV
2) High Voltage side Protection
a) differential protection 87 (operate when fault occurs between HT CT and LV CT)
b) REF restricted earth fault 64 for winding protection
c) over flux for higher rating transformer
d) directional over current towards the source side, operate when fault feeding from LV during coupled with other transformer
NOTE: Master trip 86 relay is provided as the above relays are having less current rating output contacts, can not provide sufficient current huge trip coil circuit breaker. also 86 is provided with manual reset

3) Low voltage side Protection
Instantaneous and time delay over current 50

Is This Answer Correct ?

0 Yes

0 No

What are the different protection systems used to protect the transformer internally and externall..

Answer / avinash

Over current and earth fault Protection relay
Differential Protection relay
Restricted earth fault relay
oil temperature alarm & trip
Winding Temperature & trip
oil Level trip
buchhloz relay
oil surge relay
pressure relief device
HT breaker

Is This Answer Correct ?

0 Yes

0 No

What are the different protection systems used to protect the transformer internally and externall..

Answer / imdad husen

IN TRANSFORMER PROTECTION IF HIGH INTERNAL FAULT OCCUR BETWEEN L.V.C.T.AND H.V.C.T. THEN DIFFERENTIAL RELAY SHOULD BE ORATED AND EXTERNAL FAULT OCCUR DIFFERENTIAL RELAY SHOULD NOT ORATED BECAUSE OF ZERO SEQUENCES CURRENT IS ABSENT
IN TRANSFORMER PROTECTION IF EXTERNAL FAULT OCCUR RESTRICTED EARTH FAULT RELAY SHOULD BE OPARTED

Is This Answer Correct ?

0 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

hi every body i am master student in control engineering and my project is slip control in trains i assumed a Dc motore as traction motor but i don't have characteristics of this kind of motor that is used in train. i want from every body if he or she has the characteristics or information about Dc motor that is used in train give me those information or technical characteristics .

0 Answers

THE ROTIO OF VOLTAGE AND CURRENT IN A CLOSED CIRCUIT

12 Answers APGenco, Constant, Lanco,

Where the ON LOAD TAP CHANGER is provided in the setp up transformer?

2 Answers

What are the types of windings present in the ceiling fan? What winding will be effective first when we started the fan?What are the resistance and inductance ratios comparatively at the initial speed and full speed of the fan?

0 Answers MIT,

I have 3 1000 kva single phase transformers and I wish to replace them with one three phase transformer. What is he kva rating of the new three phase, is it 1000 kva also or 3000 kva.

5 Answers Central Moloney,

i want to know d working mechanism of tafe tractors next i like to know d engine type of apache bighs can anyone help me

0 Answers

In 400KV Switchyard, we have used Circuit Breaker With PIR, what is the significance of PIR & why they'r used?

2 Answers

We have two Al.busbars each of size 125mm*10 mm connected in parallel.To increase the current rating ,can we connect third busbar of size 100mm*10mm in parallel to existing two busbars?In my opinion ,if we connect busbars of different sizes in parallel,then the busbar of lowest size will take much current.So this type of paralleling should be avoided .Am I correct?

1 Answers PDP Steel,

Can anybody post questions asked in Engineers India Limited Interview? Thanks in advance.

0 Answers Engineers India Limited,

what is meant by CT burden = 10 VA?

1 Answers

battery dis charge condition long time condtion?

1 Answers

What is the meaning of ST and HT in electrical transmission and what are thier range.

6 Answers

For more Electrical Engineering Interview Questions Click Here