HHD
HHD-B Applications
Protection of Capacitors
Recommendation for the protection of capacitors with HHD fuses to DIN standard.
Assignment of rated currents of HHD fuses to capacitor ratings. To control the occurring voltage during switch off, the fuse should be chosen with the next higher range, e.g. for a capacitor voltage at 10kV the fuse should be rated 20kV - see IEC 60549, Chapter II, Para 3.2.
HV Fuse Selection
Capacitor
System Voltage( Line - Line) [kV]
Rating
6 - 7.2
10 - 12
20 - 24
Rated Current
Rated Voltage
Rated Voltage
Rated Current
Rated Voltage
Rated Current
[kVA]
[A]
[A]
[kV]
[kV]
[kV]
[A]
6.3
6.3 6.3
50
50 63 20 10 80 40
100 200 250 300 400 500 750
25 20 10 40 50 80
50 40 80 63 16 16 10 20 25
31.5
6 - 12
10 - 24
20 - 36
200 160 100 315 315 250
100 125 160 200
1 000 1 250 1 600 2 000
100
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