15
Technical data
Energizing inputs
Rated current I
n
1 A/5 A
Thermal current withstand
- continuously 4 A/20 A
- for 1 s 100 A/500 A
Dynamic current withstand, half-wave value 250 A/1250 A
Input impedance < 100 mΩ/< 20 mΩ
Rated frequency  f
n
, acc. to order 50 Hz or 60 Hz
Output contact ratings
Contact interval 65-66
68-69
Rated voltage 250 V dc or  ac
Continuous carry 5 A
Make and carry for 0.5 s 30 A
Make and carry for 3 s 15 A
Breaking capacity for dc, when the control
circuit time constant L/R < 40 ms, at the
control voltage levels 48/110/220 V dc 5 A/3 A/1 A
Contact material AgCdO
2
Alarm contacts 70-71-72, 73-74-75,
76-77-78
Rated voltage 250 V dc or ac
Continuous carry 5 A
Make and carry for 0.5 s 10 A
Make and carry for 3 s 8 A
Breaking capacity for dc, when the control
circuit time constant L/R < 40 ms, at the
control voltage levels 48/110/220 V dc 1 A/0.25 A/0.15 A
Contact material AgCdO
2
Auxiliary power module
Power supply module
- type SPGU 240A1 80…265 V dc or ac
- type SPGU 48B2 18…80 V dc
Burden of auxiliary supply under quiescent/
operating conditions ~10 W/ ~15 W
Differential relay modules SPCD 3C21, SPCD 3C22 and SPCD 3C23
Transforming ratio matching range of the HV
side current transformer 0.5…1.0 x I
n
Transforming ratio matching range of the LV
side current transformer 0.5...1.0 x I
n
Differential stage I
d
>
Setting range of the basic setting p 20…50 % I
n
Setting range of the starting ratio s 10…50 %
2nd harmonic blocking threshold 10…20 % I
d
Operating time 20…50 ms
High-set instantaneous stage I
d
>>
Starting current setting range 20…30 x I
n
Operating time 10…20 ms
C