Check Operate Value/Reset Value/Oper ate Timing for all phases OK/ NOT OK Zone-I OK/ NOT OK Zone-II OK/ NOT OK Check Zone OK/ NOT OK Block Auto-reclose for all CB’s Connected Zone-I OK/ NOT OK Zone-II OK/ NOT OK ii If directional Element provided ,Relay tested & Direction found O.K OK/ NOT OK iii Test results enclosed & accepted
iv
Zone-I Tripping extended to :
Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No
v
Zone-II Tripping extended to :
Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No
vi
LBB/BFR trip checked & extended to Zone-I
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
vii
LBB/BFR trip checked & extended to Zone-II
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
viii Transfer Bus Trip Checked OK/ NOT OK
ix Close Interlock in case of BB Trip Checked for all applicable CB’s
x RESET Working properly Yes/ No
xi DC selection working properly for DC-I & II Yes/ No xii Carry out stability test by simulating external and internal faults by
primary injection and measure spill currents in Bus bar diff. relay
OK/ NOT OK
xiii Verify stabilizing resistor & Metrosil connection(wherever applicable)
OK/ NOT OK
xiv
Check for CT switching relay operation, in case of DMT scheme by closing respective isolators. Also inject current at the relay panel entry point and measure current at Bus Bar protection relay terminals after operating respective CT switching relay
OK/ NOT OK
1. Disturbance recorder
i Check communication to PC/Terminals/Printers OK/ NOT OK ii Check All Analog Inputs (residual Voltages &
R-Y-B-Neutral currents)
OK/ NOT OK iii Check Conversion( Primary to secondary ratio) settings are
programmed as per scheme
OK/ NOT OK iv Check contacts status of all digital inputs OK/ NOT OK
v
Normally six I/P’s are from Tw o CB’s. check Selective phase operation for RYB Poles for both the CB’s. Ensure proper show of Phase/Pole
OK/ NOT OK
vi Check Analog threshold setting OK/ NOT OK
vii
Check whether all digital Inputs are programmed for initiation of recording Disturbance as well as right status( NO/NC). Also check the sequence of digital channels as per Technical specifications
OK/ NOT OK
viii Run self-diagnostic program & get a print for future reference.
Otherwise, note down various Voltages at Monitoring points
OK/ NOT OK
ix Simulate a disturbance by shorting contacts of a Digital I/P. Check recording in progress. Print the same
OK/ NOT OK x Repeat the above for all digital I/P Contacts OK/ NOT OK xi
For analog threshold values (if provided), connect to Standard test kit to DR & test Threshold Value initiation of recording by Varying Voltages & Frequencies( Voltage Th reshold, Frequency thresholds
& DF/DT thresholds)
OK/ NOT OK
xii
Check Time synchronizing by altering Time Zone in TSE. Restore on confirmation. Also check time stamping in the relays by
externally triggering DR and record the error w.r.t. GPS time
OK/ NOT OK
xiii Check all analogue & digital inputs are configured as per power grid standard list
OK/ NOT OK xiv Compare/Check analog value displayed on PC with the injected
input analog value
OK/ NOT OK xv Take a print out of DR settings & ke ep for future reference OK/ NOT OK xvi Check for availability of proper software OK/ NOT OK 2. Sequential Event Recorder
i Check communication to PC/Terminals/Printers OK/ NOT OK ii Check contacts status of all digital inputs OK/ NOT OK iii Check whether all digital Inputs are programmed with right status( OK/ NOT OK
Busbar Protection
Check Operate Value/Reset Value/Oper ate Timing for all phases OK/ NOT OK Zone-I OK/ NOT OK Zone-II OK/ NOT OK Check Zone OK/ NOT OK Block Auto-reclose for all CB’s Connected Zone-I OK/ NOT OK Zone-II OK/ NOT OK ii If directional Element provided ,Relay tested & Direction found O.K OK/ NOT OK iii Test results enclosed & accepted
iv
Zone-I Tripping extended to :
Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No
v
Zone-II Tripping extended to :
Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No Trip relay Location ………… for CB No………. LBB Initiated Yes/ No PLCC/D.T. Yes/ No
vi
LBB/BFR trip checked & extended to Zone-I
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
vii
LBB/BFR trip checked & extended to Zone-II
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
From CB No………. OK/ NOT OK
viii Transfer Bus Trip Checked OK/ NOT OK
ix Close Interlock in case of BB Trip Checked for all applicable CB’s
x RESET Working properly Yes/ No
xi DC selection working properly for DC-I & II Yes/ No xii Carry out stability test by simulating external and internal faults by
primary injection and measure spill currents in Bus bar diff. relay
OK/ NOT OK
xiii Verify stabilizing resistor & Metrosil connection(wherever applicable)
OK/ NOT OK
xiv
Check for CT switching relay operation, in case of DMT scheme by closing respective isolators. Also inject current at the relay panel entry point and measure current at Bus Bar protection relay terminals after operating respective CT switching relay
OK/ NOT OK
1. Disturbance recorder
i Check communication to PC/Terminals/Printers OK/ NOT OK ii Check All Analog Inputs (residual Voltages &
R-Y-B-Neutral currents)
OK/ NOT OK iii Check Conversion( Primary to secondary ratio) settings are
programmed as per scheme
OK/ NOT OK iv Check contacts status of all digital inputs OK/ NOT OK
v
Normally six I/P’s are from Tw o CB’s. check Selective phase operation for RYB Poles for both the CB’s. Ensure proper show of Phase/Pole
OK/ NOT OK
vi Check Analog threshold setting OK/ NOT OK
vii
Check whether all digital Inputs are programmed for initiation of recording Disturbance as well as right status( NO/NC). Also check the sequence of digital channels as per Technical specifications
OK/ NOT OK
viii Run self-diagnostic program & get a print for future reference.
Otherwise, note down various Voltages at Monitoring points
OK/ NOT OK
ix Simulate a disturbance by shorting contacts of a Digital I/P. Check recording in progress. Print the same
OK/ NOT OK x Repeat the above for all digital I/P Contacts OK/ NOT OK xi
For analog threshold values (if provided), connect to Standard test kit to DR & test Threshold Value initiation of recording by Varying Voltages & Frequencies( Voltage Th reshold, Frequency thresholds
& DF/DT thresholds)
OK/ NOT OK
xii
Check Time synchronizing by altering Time Zone in TSE. Restore on confirmation. Also check time stamping in the relays by
externally triggering DR and record the error w.r.t. GPS time
OK/ NOT OK
xiii Check all analogue & digital inputs are configured as per power grid standard list
OK/ NOT OK xiv Compare/Check analog value displayed on PC with the injected
input analog value
OK/ NOT OK xv Take a print out of DR settings & ke ep for future reference OK/ NOT OK xvi Check for availability of proper software OK/ NOT OK 2. Sequential Event Recorder
i Check communication to PC/Terminals/Printers OK/ NOT OK ii Check contacts status of all digital inputs OK/ NOT OK iii Check whether all digital Inputs are programmed with right status( OK/ NOT OK
NO/NC)
iv Selective checking of each & every contacts is to be done in sequences. Print-Out/Display is to be compared
OK/ NOT OK
v
Normally six I/P’s are from Tw o CB’s. check Selective Phase operation for RYB Poles for both the CB’s. Ensure proper show of Phase/Pole.
OK/ NOT OK
vi Check Time synchronizing by altering Time Zone. Restore on confirmation
OK/ NOT OK vii Take a print out of plant status (if available) and compare with the
actual status
OK/ NOT OK
viii Check for availability of proper software & site programmability of event text
OK/ NOT OK
3. OLTC/RTCC for Transformer
i
OLTC Operation checked from
Local Panel OK/ NOT OK
Remote Panel OK/ NOT OK
Super/Control Panel OK/ NOT OK
ii Tap Position Display OK/ NOT OK
iii Correct Tap position display at local panel & at remote display with respective OLTC indicator.
OK/ NOT OK
iv All Indicating lamps checked OK/ NOT OK
v Tap Position Discrepancy Trip OK/ NOT OK
vi
Master/Follower scheme Checked for Master :Xformer-1 OK/ NOT OK Master :Xformer-2 OK/ NOT OK Master :Xformer-3 OK/ NOT OK vii Check auto supply changeover feature for OTLC/Transformer (If
available)
OK/ NOT OK
4. General
i
Many a time, different Auxiliary voltages are used for drive power of DR & EL.For example, relay DC is 220 V, DR has it’s isolated optical I/P , EL has 50 V drive DC. C onscious effort is to be put to keep all voltage contacts of relay, DR & EL isolated from each other
OK/ NOT OK
ii In case any changes are to be made in terminal designation, corresponding change in ferruling
Done/ Not done iii In each & every panel & Marshalling Boxes/Kiosks, CT & CVT
Circuits must be provided with Disconnecting stud type terminals
OK/ NOT OK
iv 20% spare TB’s provided in all types OK/ NOT OK
v
Close Interlock of CB: In case trip relay is energized, Close
command not forwarded. Normally, Manual Close command from CP must be in series with One set of NC contact of the Trip relay
OK/ NOT OK
vi
CB in OFF Condition Selective checking of Trip-CKT Supervision relay of all CB’s.by Opening wire from TC, one by One.Repeat the same with CB in On Condition
vii Permissive Tripping command thr’ PLCC Main-I Main-II 1st CH. Return Time ………. mS ………. mS
2nd CH. Return Time ………. mS ………. mS
viii If substantial difference noted in above, reason for the difference ……….
ix Any Prospect for reduction of Diff. in Time Yes/ No
x Hanging of RTU reported in Event logger Yes/ No
xi Reporting of communication failure of each channel in SER Yes/ No xii Any data error encountered during isolator operation Yes/ No xiii Suggestion for improvement………..
5. General
i Single point earthing must be ensured for CT&PT circuit Yes/ No ii In case of four CT scheme ensure summation of Main/Tie/ Reactor
CTs secondary to input of relay/ meters
Yes/ No
6. Final Documentation Review
S.No. Description Status
(Yes/ No)
Remarks (Record deficiencies, if any)
1. Final document of Pre-commissioning checks reviewed and approved
2. Documents regarding spares, equipment, factory reports, O&M manuals etc. available at site for O&M purpose
3. After modification, if any, “As built drawing are available at
site
NO/NC)
iv Selective checking of each & every contacts is to be done in sequences. Print-Out/Display is to be compared
OK/ NOT OK
v
Normally six I/P’s are from Tw o CB’s. check Selective Phase operation for RYB Poles for both the CB’s. Ensure proper show of Phase/Pole.
OK/ NOT OK
vi Check Time synchronizing by altering Time Zone. Restore on confirmation
OK/ NOT OK vii Take a print out of plant status (if available) and compare with the
actual status
OK/ NOT OK
viii Check for availability of proper software & site programmability of event text
OK/ NOT OK
3. OLTC/RTCC for Transformer
i
OLTC Operation checked from
Local Panel OK/ NOT OK
Remote Panel OK/ NOT OK
Super/Control Panel OK/ NOT OK
ii Tap Position Display OK/ NOT OK
iii Correct Tap position display at local panel & at remote display with respective OLTC indicator.
OK/ NOT OK
iv All Indicating lamps checked OK/ NOT OK
v Tap Position Discrepancy Trip OK/ NOT OK
vi
Master/Follower scheme Checked for Master :Xformer-1 OK/ NOT OK Master :Xformer-2 OK/ NOT OK Master :Xformer-3 OK/ NOT OK vii Check auto supply changeover feature for OTLC/Transformer (If
available)
OK/ NOT OK
4. General
i
Many a time, different Auxiliary voltages are used for drive power of DR & EL.For example, relay DC is 220 V, DR has it’s isolated optical I/P , EL has 50 V drive DC. C onscious effort is to be put to keep all voltage contacts of relay, DR & EL isolated from each other
OK/ NOT OK
ii In case any changes are to be made in terminal designation, corresponding change in ferruling
Done/ Not done iii In each & every panel & Marshalling Boxes/Kiosks, CT & CVT
Circuits must be provided with Disconnecting stud type terminals
OK/ NOT OK
iv 20% spare TB’s provided in all types OK/ NOT OK
v
Close Interlock of CB: In case trip relay is energized, Close
command not forwarded. Normally, Manual Close command from CP must be in series with One set of NC contact of the Trip relay
OK/ NOT OK
vi
CB in OFF Condition Selective checking of Trip-CKT Supervision relay of all CB’s.by Opening wire from TC, one by One.Repeat the same with CB in On Condition
vii Permissive Tripping command thr’ PLCC Main-I Main-II 1st CH. Return Time ………. mS ………. mS
2nd CH. Return Time ………. mS ………. mS
viii If substantial difference noted in above, reason for the difference ……….
ix Any Prospect for reduction of Diff. in Time Yes/ No
x Hanging of RTU reported in Event logger Yes/ No
xi Reporting of communication failure of each channel in SER Yes/ No xii Any data error encountered during isolator operation Yes/ No xiii Suggestion for improvement………..
5. General
i Single point earthing must be ensured for CT&PT circuit Yes/ No ii In case of four CT scheme ensure summation of Main/Tie/ Reactor
CTs secondary to input of relay/ meters
Yes/ No
6. Final Documentation Review
S.No. Description Status
(Yes/
No)
Remarks (Record deficiencies, if any)
1. Final document of Pre-commissioning checks reviewed and approved
2. Documents regarding spares, equipment, factory reports, O&M manuals etc. available at site for O&M purpose
3. After modification, if any, “As built drawing are available at
site