ABB ret650 - Section 2 Available Functions; Main Protection Functions; Back-Up Protection Functions

Section 2 Available functions
2.1 Main protection functions
IEC 61850 or
Function name
ANSI Function description Transformer
RET650
RET650 (A01)
2W/1CB
RET650 (A05)
3W/1CB
RET650 (A07)
OLTC
Differential protection
T2WPDIF 87T Transformer differential protection, two winding 0–1 1
T3WPDIF 87T Transformer differential protection, three winding 0–1 1
REFPDIF 87N Restricted earth fault protection, low impedance 0–3 2 3
HZPDIF 87 1Ph High impedance differential protection 0–2 2 2
Impedance protection
ZMRPSB 68 Power swing detection 0–1
ZGCPDIS 21G Underimpedance protection for generators and
transformers
0–1
LEPDIS Load encroachment 0–1
2.2 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
Table continues on next page
1MRK 504 135-UEN A Section 2
Available functions
35
Technical manual