Table 1 - Typical Settings
IEEE No. Fig. Function Typical Settings and Remarks
51VR 11 Voltage Restrained PU: 175% I
NOM
; Curve: VI; TD: 4.
Overcurrent Zero Restraint Voltage: 100% V
NOM L-L
59N, 4 Ground Overvoltage 59N: 5% V
NEU
during HV terminal fault;
27-3N, 27-3N: 25% V
3rd
during normal operation; TD: 10s
59P 59P: 80% V
NOM
67IE 25 Directional O/C for PU: 75-100% I
NOM
GEN
; Definite Time (0.1-0.25 sec.)
Inadvertent Energization Inst: 200% I
NOM
GEN
81 21 Over/under frequency Generator protection: 57, 62Hz, 0.5s;
Island detection: 59, 61Hz, 0.1s
87G 13 Generator Phase BE1-87G: 0.4A;
Differential BE1-CDS220: Min P.U.: 0.1 * Tap;
Tap: I
NOM
; Slope: 15%
87N 8 Generator Ground BE1-CDS220: Min P.U.: 0.1 times tap; Slope 15%;
Differential Time delay: 0.1s; choose low tap
BE1-67N: current polarization; time: 0.25A; Curve: VI;
TD: 2; Instantaneous: disconnect
87UD 13 Unit Differential BE1-87T or CDS220 Min PU:0.35*Tap;
Tap: I
NOM
; Slope 30%
24
To Next Page
Loading...
