Interested to Buy Any Domain ? << Click Here >> for more details...
what are check points to be checked while charging
switchyard?(CT,PT,BREAKER,POWER TRANSFORMER)
- 1 Answers
- 5533 Views
- I also Faced
- E-Mail Answers
Answer Posted / arun 9865576777
Transformer Commissioning Work
Preliminary Test
1. HT Switchgear End
 HT BKR IR Value
Open Condition Closed
Condition
R-RI= R-Y=
R-E=
Y-YI= Y-B=
Y-E=
B-BI= B-R=
B-E=
2. Transformer end
 TRF IR Value
Note: - Neutral earth should be open
LV line PT fuse& earth link open
15sec 60sec 600sec PI
HV-E
LV-E
HV-LV
After the above tests put back neutral earth line pt fuse&
earth link Connection properly.
3. LV Panel End
 LT BKR IR Value
Open Condition
Closed Condition
R-RI= R-Y=
R-E=
Y-YI= Y-B=
Y-E=
B-BI= B-R=
B-E=
Preliminary Checks
1. HT Switchgear End
 Check Relay Setting
 Check Tightness Of CT TB
 HT Cable Connection
 Interlock Trial
 Stability Check
 BKR Trial In Test Mode
 Check Fuse
 Check MTR Operation
 Reset The All Relay
 Check Control Supply
 Reset Max Value On Relay
2. Transformer End
 TRF Body Earth
 TRF Neutral Earth
 HT Cable Connection
 Check Tightness Of CT TB
 Check WTI,OTI (or) Door Inter Lock Trial
 Check OTI,WTI Setting
 LV Side Flexible Tightness
 Check Marshalling Box Control Supply
3. LV Panel End
 Check Relay Setting
 Check Tightness Of CT TB
 LV Side Flexible Tightness
 Check Line PT Fuse
 BKR Trial In Test Mode
 Check Control Fuse
 Check MTR Operation
 Check U/V Trip Throw Line PT
 Reset The All Relay
 Check Control Supply
Before Charging
 Line PT should be in service
 LV BKR should be open condition
After TRF Charging
 Note Down Electrical Parameter In HT Side & LT Side
 Phase Sequence In LT Side
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
can any one suggest paper presentation topies for electrical engg?
What are the section criteria for cables. Now everywhere XLPE power cable is used or PVC is also used?.
what is the easiest method of short circuit current calculation ? pls. derive with a mathematical example in real life application.
Main advantage of auto transformer over two windings transformer is that A it needs no cooling B it uses only one winding C core losses are reduced D it has simple construction
why tertiary winding is used in transformer with diagram?
WHAT ARE THE CHARACTERISTICS OF AN VOLTAG AMPLIFIER
do you have some of interview Questions in power and genrator section in general whith answers
How cmd is calculated in case of energy neters
How does the phase sequence controller works, how it identifies the phases? confirm working principle
What is the function of RCBO? What are the different sensitivity ratings & each application?
what is mean by PIR in circuitbreaker and give me detail of that?
what is RNG in the DG synchronizing by PLC?
what do you mean by type zero control sytem ?Give an practical example of type zero contol sytem?
If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?
what is x'mer ,isolation x'mer & yltra-isolation x'mer?????
