Back-up protection functions
IEC 61850 or
Function
name
ANSI
Function description
Transformer
RET650
RET650 (A01)
2W/1CB
RET650 (A05)
3W/1CB
RET650 (A07)
OLTC
Current protection
PHPIOC
50
Instantaneous phase overcurrent protection, 3–phase output
0–3
2
3
OC4PTOC
51/67
Four step phase overcurrent protection, 3-phase output
0–3
2
3
2
EFPIOC
50N
Instantaneous residual overcurrent protection
0–3
2
3
EF4PTOC
51N/67N
Four step residual overcurrent protection, zero/negative sequence
direction
0–3
2
3
2
TRPTTR
49
Thermal overload protection, two time constants
0–3
2
3
2
CCRBRF
50BF
Breaker failure protection, 3–phase activation and output
0–3
2
3
CCRPLD
52PD
Pole discordance protection
0–3
2
3
GUPPDUP
37
Directional underpower protection
0–2
1
1
2
GOPPDOP
32
Directional overpower protection
0–2
1
1
2
DNSPTOC
46
Negative sequence based overcurrent function
0–2
1
2
Voltage protection
UV2PTUV
27
Two step undervoltage protection
0–2
1
1
2
OV2PTOV
59
Two step overvoltage protection
0–2
1
1
2
ROV2PTOV
59N
Two step residual overvoltage protection
0–2
1
1
2
OEXPVPH
24
Overexcitation protection
0–1
1
1
Frequency protection
SAPTUF
81
Underfrequency function
0–4
4
4
4
SAPTOF
81
Overfrequency function
0–4
4
4
4
SAPFRC
81
Rate-of-change frequency protection
0–4
2
2
4
Transformer protection RET650
1MRK 504 137-BEN B
Product version: 1.3
8
ABB
Содержание ret650
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