Manual Power Quality Filter PQFM
Electrical design and installation 53
The internal power circuit protection characteristics for cULus filters are given in
Table 23: Power circuit fuse characteristics for PQFM filters (cULus version)
Nominal
network
voltage (Vrms)
Power circuit fuse
type
Irms fuse
(Arms)
Isc
(a)
fuse
(kA) at rated
voltage
Rated Voltage (Vrms)
208
≤
Ue
≤
480
Class J Time delay
175
200
600
480 < Ue
≤
600
Class J Time delay
175
200
600
Remark:
(a)
fuse short circuit current capability
The control circuit fuses characteristics for cULus versions of PQFM active filter are
given in
Note: for CE versions, fuses are optional items.
Table 24: Control circuit fuse characteristics for PQFM filters (cULus version)
Nominal
network
voltage (Vrms)
Control circuit
fuse type
Irms fuse
(Arms)
Isc
(a)
fuse
(kA) at rated
voltage
Rated Voltage (Vrms)
208
≤
Ue
≤
480
Class C
6
200
600
480 < Ue
≤
600
Class C
6
200
600
Remark:
(a)
fuse short circuit current capability
6.7.3
Contactor type for different unit ratings
All PQFM units incorporate a main contactor. Depending on the filter rating, a different
contactor type may be used.
details the contactor type.
Table 25: Contactor type for different unit ratings
Unit rating (Arms)
Associated main contactor
70
ABB UA 95
100
ABB UA 95
130
ABB UA 95
150
ABB UA 110
Central connection in cable entry
cubicle
Contactor in every power stage cubicle according to
cubicle rating
6.7.4
Optional surge arrester circuit (CE version only)
When the filter is equipped with a surge arrester circuit (optional), this circuit has its
own fuse protection with following characteristics:
Table 26: Surge arresters circuit (optional) protection fuses (CE version)
Nominal
network
voltage (Vrms)
Surge arresters
circuit protection
fuse type
Irms fuse
(Arms)
Isc
(a)
fuse
(kA) at rated
voltage
Rated Voltage (Vrms)
208
≤
Ue
≤
480
Size 0, gG/Gl, with
striker
125
120
500
Remark:
(a)
fuse short circuit current capability