Normal condition ( At 20 dec Tem)
CB - 0.630 Mpa
VT - 0.630 Mpa
OTHERS ( ES, DS, GIB ) - 0.550 Mpa
Pressure Alarams in density Detector
Stage -I Gas Leakage Alaram
CB - 0.605 Mpa
VT - 0.605 Mpa
OTHERS ( ES, DS, GIB ) - 0.495 Mpa
Stage -II Gas Leakage Alaram
CB - 0.560Mpa
VT - 0.560 Mpa
OTHERS ( ES, DS, GIB ) - 0.450 Mpa
High pressure Alaram
OTHERS ( ES, DS, GIB ) - 0.620 Mpa
Tuesday, February 28, 2012
Saturday, February 25, 2012
UNDER FREQUENCY TRIP TO BF INITIATION
Under frequency trip will not given to BF initiation . Because the BF relay current setting will be full 1 Amps and during under frequency trip condition there is no changes in normal current. If U/F trip given to BF it will not operate.
Friday, February 24, 2012
RED 670 MASTER & SLEVE
Both side RED 670 Differential relay set as the slave and both side Converter for distance communication set as the master.
Monday, February 13, 2012
VIDEO GRAPHIC ABB
To Configuration the video graphic ( power factor meter ) switch on the configuration nab available inside the meter.
Friday, February 10, 2012
TRANSFORMER EXCITATION CURRENT
During transformer excitation current ( open circuit magnetizing current) test the measured current values in R,Y,B phase are not same. Vendor explanation below
Tuesday, February 7, 2012
DESIGN ISSUES 7SS52 BB ISOLTATOR CONTACT
1.Bus voltage Fuse failure status should give to ABTS.
5.1. Selective Buszone blocking and error protection block is appearing for 5sec and disappearing at the time of close and open operation of disconnecctors in all feeders
5.2.This will make major disturbance in busbar protection and abnormal alarm in SOE,SCADA,Annunciation
5.3.While go through found that , at the time of sequence operation two inputs open and close existing in the relay this will lead non plausible of disconnectors case (1+1), it will lead to block the busbar until it persist
5.4. The actual contact given for disconnector image ( as per the approved drawing) to the relay in LCC panel is aoi,boi contacts (as per areva drawing ref) ie Early make and late break contacts, but actual to be given is ao,bo contacts (as per areva drawing ref) Early break, Early make contacts.
2.Any interlock should not block the protection trip.
3. SCADA A/R IN/OUT command common for set-1 & set -2 multiply the command with aux - relay in control panel and give command to Line panel protection through both set-1 & set-2 L/R switch. Command goes if both switch are in remote condition.
4.7SS52 Bus unit need fiber optic washer.
5. 7SS52 Bus unit need 1-0 or 0-1 isolator contact for bus image it should not be 1-1 & 0-0 status
Testing engineer command on this issue.
While checking Isolator image switching sequence in siemens busbar relay, found that
5.2.This will make major disturbance in busbar protection and abnormal alarm in SOE,SCADA,Annunciation
5.3.While go through found that , at the time of sequence operation two inputs open and close existing in the relay this will lead non plausible of disconnectors case (1+1), it will lead to block the busbar until it persist
5.4. The actual contact given for disconnector image ( as per the approved drawing) to the relay in LCC panel is aoi,boi contacts (as per areva drawing ref) ie Early make and late break contacts, but actual to be given is ao,bo contacts (as per areva drawing ref) Early break, Early make contacts.
Subscribe to:
Posts (Atom)
