mv ats 3-12.pdf
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This document is the property of ALIK Enerji Sanayi ve Ticaret A. and may not be copied, used, reprinted or distributed by others.
GENERAL ELECTRICITY
COMPANY OF LIBYA (GECOL)
ALIK ENERJSAN.TC.A
POWER SYSTEMS E.P.C. GROUP
KHOMS SCPP
(525 MW POWER PLANT)
Revision History
A 28.04.2014 FOR APPROVAL AAB AAB JMO
REV. DATE DESCRIPTION PREPARED CHECKED APPROVED
DOCUMENT TITLE/SUBJECT:
AUTOMATIC TRANSFER SYSTEM (ATS) OPERATION PHILOSOPHY
PROJECT DOCUMENT NO:
DetailedInformation
Size A-4
Project Unit SystemDisc
Doc.
Type
Orig. Serial No Lang. Eng.
KMS 15 VG_ ER IDM 004No. of
Sheet30
VENDOR DOCUMENT NO:
** if applicable
Rev. No: A
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
Page : 2 OF 30
Date : 28.04.2014
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INDEX:
1. GENERAL DESCRIPTION ............................................................................................................................... 3
2. MV ATS ................................................................................................................................................................. 5
2.1. MVATSINMANUAL/LOCALMODEOPERATION ............................................................................ 5
2.2. MVATSINMANUAL/REMOTEMODEOPERATION ......................................................................... 7
2.3. MVATSINDISABLEMODE ................................................................................................................... 11
2.4. MVATSINAUTOMATCMODEOPERATION .................................................................................... 11
3. LV ATS ................................................................................................................................................................ 15
3.1. LVATSTYPEA ...................................................................................................................................... 15
3.1.1 LV ATS type A in Local /Manual Mode Operation ............................................................................ 16
3.1.2 LV ATS type A in Manual Mode and Remote mode Operation .......................................................... 18
3.1.3 LV ATS type Ain Disable Mode .......................................................................................................... 21
3.1.4 LV ATS type Ain Automatic Mode Operation ..................................................................................... 21
3.2. LVATSTYPEB ...................................................................................................................................... 25
3.2.1 LV ATS type B in Local /Manual Mode Operation ............................................................................ 25
3.2.2 LV ATS type B in Manual Mode and Remote mode Operation .......................................................... 25
3.2.3 LV ATS type Bin Disable Mode .......................................................................................................... 263.2.4 LV ATS type Bin Automatic Mode Operation ..................................................................................... 26
4. DCS INTERCONNECTION SIGNAL LIST .................................................................................................. 29
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OPERATION
PHILOSOPHY
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Date : 28.04.2014
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Auto Mode:Being in this mode, ATS will sense the sources. Sensing that a source can
be lost or is being lost, the ATS will transfer the load automatically without loosing
the power in the bus bar. In this mode DCS may not operate neither incomers nor bus
coupling.
Manual operation modes could be selected Locallyor Remotely(from DCS). To select from
where the ATS will be controlled, a L/R selector switch will be provided in the ATS panel.
DCS ATS SWITCH GEAR Interfaces
ATS panel for Local Operation
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2. MV ATS
The MV ATS will controlling the following switchgears:
10BBA01/02
Each ATS manages three (3) circuit breakers:
Circuit Breaker A (Incoming CB)
Circuit Breaker B (Incoming CB)
Circuit Breaker C (Tie Breaker)
The parallel coupling of the two supply lines to the switchgear could be maintained for a short
time, in order to avoid disturbance of load power during changing the supply.
2.1. MV ATS IN MANUAL / LOCAL MODE OPERATION
Manual mode and local mode could be selected in ATS panel
The operator could transfer the load, from one selected incomer to the other one (or vice
versa), through the ATS.
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All the possible scenarios are the followings:
CASE 1: Transfer Signal by Operator.
If, while normal operation (Picture 1), the operator wants to Transfer to Switchgear A,
he should locally close the tie breaker C(before closing ATS shall check
synchronization) and after that open the Circuit Breaker B (incoming to the Bus-bar B)
.
For that the steps to take are as follows in local panel:
1.- ATS should be in manual / local mode
2.- Select breaker of incomer to be closed in local panel
3.- Push transfer command in local panel
4.-After receiving the transfer command, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 2: Transfer Signal by Operator.
If, while normal operation (Picture 1), the operator wants to Transfer to Switchgear B,
he should locally close the tie breaker C (before closing ATS shall check
synchronization) and after that open the Circuit Breaker A (incoming to the Bus-bar A)
.
For that the steps to take are as follows in local panel:
1.- ATS should be in manual / local mode
2.- Select breaker of incomer to be closed in local panel
3.- Push transfer command in local panel
4.-After receiving the transfer command, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
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ATS should be in manual mode
All the possible scenarios are the followings:
CASE 6: Transfer Signal by Operator.
If, while normal operation (Picture 1), the operator wants to Transfer to Switchgear A,
he should locally close the tie breaker C (before closing ATS shall check
synchronization) and after that open the Circuit Breaker B (incoming to the Bus-bar B)
.
For that the steps to take are as follows:
1.- ATS should be in manual / remote mode
2.- ATS should be available
3.- Select breaker of incomer to be closed in DCS
4.- Push transfer command in DCS panel
5.-After receiving the transfer command from DCS, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 7: Transfer Signal by Operator.
If, while normal operation (Picture 1), the operator wants to Transfer to Switchgear B,
he should locally close the tie breaker C (before closing ATS shall check
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synchronization) and after that open the Circuit Breaker A (incoming to the Bus-bar
B).
For that the steps to take are as follows:
1.- ATS should be in manual / remote mode
2.- ATS should be available
3.- Select breaker of incomer to be closed in DCS
4.- Push transfer command in DCS panel
5.-After receiving the transfer command from DCS, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 8: Fault on Bus A.
When while normal operation (Picture 1) a fault happens on Bus A, Circuit Breaker
A (incoming to the Bus-bar A) will trip. ATS will be locked
CASE 9: Pre-alarm on Unit Auxiliary Transformer A.
If, while normal operation (Picture 1), there is a temperature prealarm or overloading
on Transformer A, Operator in Control Room will notice an alarm.
If there is any operators reaction, tie breaker C should be closed (before closing
ATS shall check synchronization) and, after, the Circuit Breaker A (incoming to the
Bus-bar A) should be opened.
CASE 10: Undervoltage on Bus A.
If, while normal operation (Picture 1), undervoltage is detected on Busbar A (V
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PHILOSOPHY
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- ATS shall check synchronization and then shall close Tie Breaker C
- ATS shall open Circuit Breaker B.DCS shall change ATS mode from manual to disable
CASE 16: Busbar A re-energization
Busbar A re-energization shall be done in Remote/Manual mode. The Operator should
close the Circuit Breaker A (incoming to the Bus-bar A) and open tie breaker C.
Before closing circuit breaker A, ATS will check synchronism.
CASE 17: Busbar B re-energization
Busbar B re-energization shall be done in Remote/Manual mode. The Operator should
close the Circuit Breaker B (incoming to the Bus-bar B) and open tie breaker C.
Before closing circuit breaker A, ATS will check synchronism.
2.3. MV ATS IN DISABLE MODE
This option shall be chosen mainly for maintenance purposes when it is required to isolate one
of the supply lines or one of the Bus-bars.
In this situation the system works as it did not exist automatic changeover system, and the
orders of opening and closing of any circuit breaker will not cause any reaction in other
circuit breakers.
2.4. MV ATS IN AUTOMATC MODE OPERATION
Automatic position could be selected or locally if ATS in Local mode or remotely if ATS in
remote mode.
Above statements mean that opening/closing commands are controlled by the ATS.
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PHILOSOPHY
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CASE 18: Fault on Bus A.
When while normal operation (Picture 1) a fault happens on Bus A, Circuit BreakerA (incoming to the Bus-bar B) will trip. ATS will be locked
CASE 19: Unit Auxiliary Transformer A tripped or Undervoltage on Bus A.
If, while normal operation (Picture 1), there is a trip on Transformer A or
Undervoltage on Busbar A (V
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OPERATION
PHILOSOPHY
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OPERATIONAL TABLE MV ATS
A C
!"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
&A/LT ! (/S ( $ %
T"AS&E" &"!# A $ $ $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %T"AS&E" &"!# ( $ % $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
T"AS&!"#E" A *"EALA"# $ %
$ $
2 % $
!"#AL $ $ %
/1E"3!LTA'E ! (/S A ALA"# $ %
$ $
2 % $
!"#AL $ $ %
&A/LT ! (/S ( $ %
&au0t on (us A "E#!TE ; #A/AL
+ASE &au0t on (us A L!+AL
+ASE 2 &au0t on (us ( L!+AL
+ASE 7aTransfer Si
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OPERATION
PHILOSOPHY
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A C
!"#AL $ $ %T"AS&!"#E" ( *"EALA"# $ %
$ $
2 $ $
!"#AL $ $ %
/1E"3!LTA'E ! (/S ( ALA"# $ %
$ $
2 $ $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
% $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
$ $
/1E"3!LTA'E ! (/S A $ % $
"E>EE"'IATI! (/S(A" A $ $
$ %
/1E"3!LTA'E ! (/S ( $ $ $
"E>EE"'IATI! (/S(A" ( $ $
$ %
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
$ $
% $
!"#AL $ $ %
&A/LT ! (/S ( $ %
!"#AL $ $ %
$ $
$ $
1ISA(LE ATS 1ISA(LE
L!+AL 1+S (L!+KE1
#A/AL
A/T!
89: Times indicated are orientab0e. Time of /ndervo0ta
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SYSTEM (ATS)
OPERATION
PHILOSOPHY
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3. LV ATS
The LV automatic changeover systems (ACO) to be considered are the following ones:
LV ATS Type A: Connection between 2 Normal LV Switchgears.
LV ATS Type B: Connection between 2 Essential LV Switchgears and 1
Emergency Diesel Group.
The following General considerations have to be taken into account in order to guarantee the
proper working of the Automatic Change Over System:
At least two CBs must be closed.
All the circuit breakers must be not tripped.
No fault in any Busbar.
All Circuit Breakers shall be in Remote Mode.
All Circuit Breakers shall be available in DCS (grouped signals: Remote Mode, No
test mode, CB inserted ):
3.1. LV ATS TYPE A
Controlling the switchgears:
11BFB01/02
12BFB01/02
10BFA01/02
Each ATS manages three (3) circuit breakers:
Circuit Breaker A (Incoming CB)
Circuit Breaker B (Incoming CB)
Circuit Breaker C (Tie Breaker)
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The parallel coupling of the two supply lines to the switchgear could be maintained for a short
time, in order to avoid disturbance of load power during changing the supply.
3.1.1 LV ATS type A in Local /Manual Mode Operation
Manual mode and local mode could be selected in ATS panel
The operator could transfer the load, from one selected incomer to the other one (or vice
versa), through the ATS.
All the possible scenarios are the followings:
CASE 1: Transfer Signal by Operator.
If, while normal operation, the operator wants to Transfer to Switchgear A, he should
locally close the tie breaker C(before closing ATS shall check synchronization) and
after that open the Circuit Breaker B (incoming to the Bus-bar B) .
For that the steps to take are as follows in local panel:
1.- ATS should be in manual / local mode
2.- Select breaker of incomer to be closed in local panel
3.- Push transfer command in local panel
4.-After receiving the transfer command, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltagemagnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 2: Transfer Signal by Operator.
If, while normal operation, the operator wants to Transfer to Switchgear B, he should
locally close the tie breaker C (before closing ATS shall check synchronization) and
after that open the Circuit Breaker A (incoming to the Bus-bar A) .
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For that the steps to take are as follows in local panel:1.- ATS should be in manual / local mode
2.- Select breaker of incomer to be closed in local panel
3.- Push transfer command in local panel
4.-After receiving the transfer command, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 3: Fault on Bus A.
When while normal operation, a fault happens on Bus A, Circuit Breaker A
(incoming to the Bus-bar A) will trip. ATS will be locked.
CASE 4: Fault on Bus B.
When while normal operation a fault happens on Bus B, Circuit Breaker B
(incoming to the Bus-bar B) will trip. ATS will be locked.
CASE 5: Transfer Signal by Operator to come to normal operation.
If, the operator wants to go to normal operation fromTransfer A or B busbar, he should
locally close Circuit breaker of the incomer A or B, that was opened (before closing
ATS shall check synchronization) and after that open the tie Breaker C.
For that the steps to take are as follows in local panel:
1.- ATS should be in manual / local mode
2.- Select INC-1/INC-2 in local panel
3.- Push transfer command in local panel
4.-After receiving the transfer command, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
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magnitude, frequency and phase angle falls within allowable limits) and then close the
breaker (which was open) and open the tie breaker.
3.1.2 LV ATS type A in Manual Mode and Remote mode Operation
Being the ATS in manual mode (this operation mode could be selected remotely if ATS in
remote mode), the operator could transfer the load, from one selected incomer to the other (or
vice versa), through the ATS.
ATS should be in manual mode
All the possible scenarios are the followings:
CASE 6: Transfer Signal by Operator.
If, while normal operation, the operator wants to Transfer to Switchgear A, he should
locally close the tie breaker C (before closing ATS shall check synchronization) and
after that open the Circuit Breaker B (incoming to the Bus-bar B) .
For that the steps to take are as follows:
1.- ATS should be in manual / remote mode
2.- ATS should be available
3.- Select breaker of incomer to be closed in DCS
4.- Push transfer command in DCS panel5.-After receiving the transfer command from DCS, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 7: Transfer Signal by Operator.
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If, while normal operation , the operator wants to Transfer to Switchgear B, he should
locally close the tie breaker C (before closing ATS shall check synchronization) andafter that open the Circuit Breaker A (incoming to the Bus-bar B) .
For that the steps to take are as follows:
1.- ATS should be in manual / remote mode
2.- ATS should be available
3.- Select breaker of incomer to be closed in DCS
4.- Push transfer command in DCS panel
5.-After receiving the transfer command from DCS, ATS will check synchronization
(synchrocheck or synchcheck relay electrically determines if the difference in voltage
magnitude, frequency and phase angle falls within allowable limits) and then close the
tie breaker (which was open) and open the incoming breaker that has not been
selected.
CASE 8: Fault on Bus A.
When while normal operation a fault happens on Bus A, Circuit Breaker A
(incoming to the Bus-bar A) will trip. ATS will be locked
CASE 9: Pre-alarm on MV/LV Transformer A.
If, while normal operation , there is a temperature prealarm or overloading on
Transformer A, Operator in Control Room will notice an alarm.
If there is any operators reaction, tie breaker C should be closed (before closing
ATS shall check synchronization) and, after, the Circuit Breaker A (incoming to the
Bus-bar A) should be opened.
CASE 10: Undervoltage on Bus A.
If, while normal operation , undervoltage is detected on Busbar A (V
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If there is any operators reaction, tie breaker C should be closed (before closing
ATS shall check synchronization) and, after, the Circuit Breaker A (incoming to theBus-bar A) should be opened.
CASE 11: Fault on Bus B.
When while normal operation a fault happens on Bus B, Circuit Breaker B
(incoming to the Bus-bar B) will trip. ATS will be locked
CASE 12: Pre-alarm on MV/LV Transformer B.
If, while normal operation , there is a temperature prealarm or overloading on
Transformer B, Operator in Control Room will notice an alarm.
If there is any operators reaction, tie breaker C should be closed (before closing
ATS shall check synchronization) and, after, the Circuit Breaker B (incoming to the
Bus-bar B) should be opened.
CASE 13: Undervoltage on Bus B.
If, while normal operation , undervoltage is detected on Busbar B (V
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CASE 15: MV/LV TRANSFORMER B in maintenance:
If while Normal Operation, with ATS in Remote Mode it is decided to make amaintenance to MV/LV Transformer B, Distributed Control System (DCS) will
send the transfer order to ATS:
- ATS shall check synchronization and then shall close Tie Breaker C
- ATS shall open Circuit Breaker B.
DCS shall change ATS mode from manual to disable
CASE 16: Busbar A re-energization
Busbar A re-energization shall be done in Remote/Manual mode. The Operator should
close the Circuit Breaker A (incoming to the Bus-bar A) and open tie breaker C.
Before closing circuit breaker A, ATS will check synchronism.
CASE 17: Busbar B re-energization
Busbar B re-energization shall be done in Remote/Manual mode. The Operator should
close the Circuit Breaker B (incoming to the Bus-bar B) and open tie breaker C.
Before closing circuit breaker A, ATS will check synchronism.
3.1.3 LV ATS type Ain Disable Mode
This option shall be chosen mainly for maintenance purposes when it is required to isolate one
of the supply lines or one of the Bus-bars.
In this situation the system works as it did not exist automatic changeover system, and the
orders of opening and closing of any circuit breaker will not cause any reaction in other
circuit breakers.
3.1.4 LV ATS type Ain Automatic Mode Operation
Automatic position could be selected or locally if ATS in Local mode or remotely if ATS in
remote mode.
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Above statements mean that opening/closing commands are controlled by the ATS.
In Operational Table LV ATS type A all the scenarios have been explained as follows:
CASE 18: Fault on Bus A.
When while normal operation (Picture 1) a fault happens on Bus A, Circuit Breaker
A (incoming to the Bus-bar B) will trip. ATS will be locked
CASE 19: MV/LV Transformer A tripped or Undervoltage on Bus A.
If, while normal operation (Picture 1), there is a trip on Transformer A or
Undervoltage on Busbar A (V
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
Page : 23 OF 30
Date : 28.04.2014
Revision : A
This document is the property of ALIK Enerji Sanayi ve Ticaret A. and may not be copied, used, reprinted or distributed by others.
OPERATIONAL TABLE LV ATS TYPE A
A C !"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
&A/LT ! (/S ( $ %
T"AS&E" &"!# A $ $ $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %
T"AS&E" &"!# ( $ % $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
T"AS&!"#E" A *"EALA"# $ %
$ $
2 % $
!"#AL $ $ %
/1E"3!LTA'E ! (/S A ALA"# $ % $ $
2 % $
!"#AL $ $ %
&A/LT ! (/S ( $ %
+ASE B Transfer Si
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
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Date : 28.04.2014
Revision : A
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A C !"#AL $ $ %
T"AS&!"#E" ( *"EALA"# $ %
$ $
2 $ $
!"#AL $ $ %
/1E"3!LTA'E ! (/S ( ALA"# $ %
$ $
2 $ $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
% $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
$ $
/1E"3!LTA'E ! (/S A $ % $
"E>EE"'IATI! (/S(A" A $ $
$ %
/1E"3!LTA'E ! (/S ( $ $ $"E>EE"'IATI! (/S(A" ( $ $
$ %
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
$ $
% $
!"#AL $ $ %
&A/LT ! (/S ( $ %
!"#AL $ $ %
$ $
$ $
1ISA(LE ATS 1ISA(LE
L!+AL 1+S (L!+KE1
#A/AL
A/T!
T"AS&!"#E" A T"I*
/1E"3!LTA'E ! (/S A
T"AS&!"#E" ( T"I*
/1E"3!LTA'E ! (/S (
+ASE $C &au0t on (us A "E#!TE ; A/T!
+ASE $=#3L3 Transformer @A tripped or
/ndervo0taener
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
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Date : 28.04.2014
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3.2. LV ATS TYPE B
Controlling the switchgears:
10BMA01/02
This ATS manages three (3) circuit breakers:
Circuit Breaker A (Incoming CB)
Circuit Breaker B (Incoming CB) Circuit Breaker C (Tie Breaker)
The parallel coupling of the two supply lines to the switchgear could be maintained for a short
time, in order to avoid disturbance of load power during changing the supply.
3.2.1 LV ATS type B in Local /Manual Mode Operation
LV ATS Type B shall work as LV ATS Type A
3.2.2 LV ATS type B in Manual Mode and Remote mode Operation
LV ATS Type B shall work as LV ATS Type A with the following exceptions:
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
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Date : 28.04.2014
Revision : A
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cases related to MV/LV Transformers have also been modified or eliminated, becauseincomers of busbar A or B are from BFA busbar
in case of no power supply in Bus-bars B after the transfer done, EDG will start
automatically to feed the essential loads according to document EGDs philosophy.
3.2.3 LV ATS type Bin Disable Mode
LV ATS Type B shall work as LV ATS Type A
3.2.4 LV ATS type Bin Automatic Mode Operation
LV ATS Type B shall work as LV ATS Type A with the following exceptions:
cases related to MV/LV Transformers have also been modified or eliminated, because
incomers of busbar A or B are from BFA busbar
in case of no power supply in Bus-bars B after the transfer done, EDG will start
automatically to feed the essential loads according to document EGDs philosophy.
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
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Date : 28.04.2014
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OPERATIONAL TABLE LV ATS TYPE B
A C !"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
&A/LT ! (/S ( $ %
T"AS&E" &"!# A $ $ $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %
T"AS&E" &"!# ( $ % $
T"AS&E" SI'AL () !*E"AT!" L!+ALL) $ $
!"#AL $ %
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
$ $
!"#AL $ $ %
T"AS&E" SI'AL () 1+S $ $
% $
!"#AL $ $ %
&A/LT ! (/S A % %
+ASE = *re>a0arm on #3L3 Transformer @A
!"#AL $ $ %
/1E"3!LTA'E ! (/S A ALA"# $ %
$ $
2 % $
!"#AL $ $ %&A/LT ! (/S ( $ %
A
if there i s an operatorDs reaction
+ASE B Transfer Si
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
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Page : 28 OF 30
Date : 28.04.2014
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A C +ASE $ *re>a0arm on #3L3 Transformer @(
!"#AL $ $ %
/1E"3!LTA'E ! (/S ( ALA"# $ %
$ $
2 $ $
+ASE $2 T"AS&!"#E" A I #AITEA+E
+ASE $7 T"AS&!"#E" ( I #AITEA+E
/1E"3!LTA'E ! (/S A $ % $
"E>EE"'IATI! (/S(A" A $ $
$ %
/1E"3!LTA'E ! (/S ( $ $ $
"E>EE"'IATI! (/S(A" ( $ $
$ %
!"#AL $ $ %
&A/LT ! (/S A % %
!"#AL $ $ %
$ $
% $!"#AL $ $ %
&A/LT ! (/S ( $ %
!"#AL $ $ %
$ $
$ $
1ISA(LE ATS 1ISA(LE
L!+AL 1+S (L!+KE1
#A/AL
A/T!
+ASE $ /ndervo0taenerener
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
Page : 29 OF 30
Date : 28.04.2014
Revision : A
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4. DCS INTERCONNECTION SIGNAL LIST
As per this operation philosophy there will be the following signals exchange between ATS
and DCS:
SIGNALSIGNAL TYPE (in
DCS)
SIGNAL
VOLTAGE
LEVEL
DESCRIPTION
1isab0e #ode 1!
#aintained type
2 3dc
8A+!:
1isab0e mode se0ection from 1+S J#I
#anua0 #ode 1!
#aintained type
2 3dc
8A+!:
#anua0 mode se0ection from 1+S J#I
Auto #ode 1!
#aintained type
2 3dc
8A+!:
Auto mode se0ection from 1+S J#I
Incomer> $ Se0ected 1!
#aintained type
2 3dc
8A+!:
Incomer $ se0ected from 1+S J#I
Incomer> Se0ected 1!
#aintained type
2 3dc
8A+!:
Incomer se0ected from 1+S J#I
I+>$I+>
Se0ected
1!
#aintained type
2 3dc
8A+!:
I+>$I+> se0ected from 1+S J#I. To
come to norma0 situation
Transfer +ommand 1!
*u0se type
87 sec:
2 3dc
8A+!:
+ommand from 1+S to reuire ATS to
rea0iGe a manua0 transfer accordin< to
the se0ection done.
Avai0ab0e 1I
#aintained type
2 3dc
81+S:
ATS is ready for operation no a0arm,
poFer supp0y o-, etc.
1isab0e
1I
#aintained type
2 3dc
81+S:
ATS is out of order. In this situation
1+S can open and c0ose incomers and
bus coup0er but never can c0ose a00 of
them at the same time.
#anua0 #ode1I
#aintained type
2 3dc
81+S:
ATS is in #anua0 #ode. In this situation
1+S cannot operate incomers or bus
coup0er. ATS Fi00 operate them
Auto #ode1I
#aintained type2 3dc81+S:
ATS is in Auto #ode. In this situation
1+S cannot operate incomers or bus
coup0er. ATS Fi00 operate them
"emote #ode1I
#aintained type
2 3dc
81+S:
ATS is in "emote #ode. 1+S can
se0ectcontro0 ATS operation modes
disab0e, manua0 or auto mode
Loca0 #ode1I
#aintained type
2 3dc
81+S:
ATS is in Loca0 #ode. Loca00y operator
can se0ectcontro0 ATS operation
modes disab0e, manua0 or auto mode
Transfer 1one 1I
*u0se type
87 sec:
2 3dc
81+S:
ATS feedbac-. Transfer correct0y done.
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AUTOMATIC TRANSFER
SYSTEM (ATS)
OPERATION
PHILOSOPHY
Doc. No. : KMS-15-VG_-ER_-IDM-004
Page : 30 OF 30
Date : 28.04.2014
Revision : A
SIGNALSIGNAL TYPE (in
DCS)
SIGNAL
VOLTAGE
LEVEL
DESCRIPTION
A0arm 1I
#aintained type2 3dc
81+S:
ATS has