ABB Relion 650 Series Product Manual page 11

Transformer protection RET650
Version 2.2
Back-up protection functions
IEC 61850 or ANSI
function name
Current protection
PHPIOC 50
OC4PTOC 1)
51_67
EFPIOC 50N
EF4PTOC 51N
2)
67N
NS4PTOC 46I2
TRPTTR 49
CCRBRF 50BF
CCPDSC 52PD
GUPPDUP 37
GOPPDOP 32
BRPTOC 50
Voltage protection
UV2PTUV 27
OV2PTOV 59
ROV2PTOV 59N
OEXPVPH 24
VDCPTOV 60
LOVPTUV 27
Frequency protection
SAPTUF 81
SAPTOF 81
SAPFRC 81
1) 67 requires voltage
2) 67N requires voltage
Hitachi Power Grids
Function description
Instantaneous phase overcurrent protection
Directional phase overcurrent protection, four steps
Instantaneous residual overcurrent protection
Directional residual overcurrent protection, four steps
Directional negative phase sequence overcurrent protection, four
steps
Thermal overload protection, two time constants
Breaker failure protection
Pole discordance protection
Directional underpower protection
Directional overpower protection
Overcurrent protection with binary release
Two step undervoltage protection
Two step overvoltage protection
Residual overvoltage protection, two steps
Overexcitation protection
Voltage differential protection
Loss of voltage check
Underfrequency protection
Overfrequency protection
Rate-of-change of frequency protection
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1MRK 504 172-BEN G
GUID-A8D0852F-807F-4442-8730-E44808E194F0 v17
Transformer
RET650 (A01) RET650 (A05)
2
2
2
4
1
2
2
2
1
1
2
1
1
1
1
2
1
4
4
2
3
3
3
5
2
3
3
3
1
1
3
2
2
2
2
2
2
4
4
2
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