ABB Relion 620 Series Manual page 8
Transformer protection and control
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Also See for Relion 620 Series:
- Technical manual (1224 pages) ,
- Operation manual (152 pages) ,
- Applications manual (90 pages)
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2
LD0.OLATCC1 On-load tap changer controller......................28
Metering and measurand functions.............................................28
LD0.CMMXU1 Phase currents (1) limit supervision...............28
LD0.CMMXU2 Phase currents (2) limit supervision...............29
LD0.RESCMMXU1 Residual current limit supervision...........29
LD0.RESCMMXU2 Residual current limit supervision...........29
LD0.VMMXU1 Three-phase voltage limit supervision............29
LD0.RESVMMXU1 Residual voltage limit supervision...........30
Protection functions.....................................................................30
LD0.LEDPTRC1 Global protection signals.............................30
LD0.TRPPTRC1 Global conditioning (1)................................30
LD0.TRPPTRC2 Global conditioning (2)................................30
stage 2....................................................................................31
protection - low stage (1)........................................................31
protection - high stage (1)......................................................31
sensitive earth-fault protection - low stage 1..........................32
sensitive earth-fault protection - high stage 1.........................32
stage 1 ...................................................................................33
stage 2 ...................................................................................33
instantaneous stage 1 ...........................................................33
instantaneous stage 2 ...........................................................33
stage 1 ...................................................................................33
stage 2 ...................................................................................34
(1)...........................................................................................34
(2)...........................................................................................34
RET620
Point List Manual
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