ABB PQFS Installation, Operation And Maintenance Instructions page 42

Filter nominal current
rating (Arms)
30
45
60
70
80
90
100
Voltage rating of the fuses should be according to the network voltage.
As an alternative to fuse protection, MCCB protection of appropriate sizing can also be
used.
When the customer protection is in place, the following PQFS input protection will result.
L1
L2
L3
N
Note: neutral connection only needed for 4-wire connection
The active filter power circuit is internally connected to the network by means of a main
contactor of type ABB AF 75.
The PQFS control circuit and DC bus preload system is protected by a fuse protection
scheme, the characteristics of which are given in
42 Electrical design and installation ç Manual Power Quality Filter PQFS
Table 19: RMS current ratings for protection fuses
Minimum fuse protection
(Arms)
40
63
80
100
100
125
125
Customer added protection
To PQFS To PQFS control circuit and
power stage
Figure 31: Symbolic representation of the PQFS input protection
Maximum fuse protection
(Arms)
125
125
125
160
160
160
160
2.5mm² reinforced
6A (10X38 for up to 415V)
DC bus loading circuit
Table 20.
PQFS filter unit