ABB SPAD 330 C - Technical Data Summary; Differential Stage Parameters

10
Differential relay module type designations
- differential relay module for phase L1 SPCD 3C21
- differential relay module for phase L2 SPCD 3C22
- differential relay module for phase L3 SPCD 3C23
Biased differential stage I
d
>
Basic starting value p, setting range 20…50 % of I
n
Starting ratio s, setting range 10...50 %
HV side CT transforming ratio I
1
/I
n
correction, setting range 0.5…1.0
LV side CT transforming ratio I
2
/I
n
correction, setting range 0.5...1.0
Restraint threshold of the second
harmonic, setting range 10…20 % x I
d
Operation accuracy ±5 % of set value
Operating time 20…50 ms
High-set stage I
d
>>
Starting current I
d
>>, setting range 20…30 x I
n
Operation accuracy ±5 % of maximum value of setting range
Operation time 10…20 ms
Technical data
C