4.2.11 Fuses
Branch circuit protection
To protect the installation against electrical and fire hazard,
all branch circuits in an installation, switch gear, machines
etc., must be short-circuited and overcurrent protected
according to national/international regulations.
Short circuit protection
Protect the active filter against short circuit to avoid
electrical or fire hazard. Danfoss recommends using the
fuses in Table 4.11 and Table 4.12 to protect service
personnel and equipment in case of an internal failure in
the device.
Overcurrent protection
The active filter is equipped with an internal overcurrent
protection that avoids overload in normal running
conditions. Overload protection is needed in case of
internal failures to avoid fire hazard due to overheating of
the cables in the installation. Use fuses or circuit breakers
for overcurrent protection and comply with local and
national regulations.
Mains fuses
Active Filter Bussmann Rating
AAF006, 190 A 170M3018 350 A, 700 V
AAF006, 250 A 170M4017 700 A, 700 V
AAF006, 310 A 170M4017 700 A, 700 V
AAF006, 400 A 170M6013 900 A, 700 V
Table 4.11 Recommended Mains Fuses
Supplemental fuses
Active Filter Protection Fuse Rating
AAF006, 190–
400A SMPS
Bussmann
KTK-4 4 A, 600 V
AAF006, 190–
400A Fan
Littelfuse
KTK-15
15 A, 600
V
AAF006, 190–
400A
Soft-charge
resistor
Bussmann FNQ-
R 1 A, 600 V
AAF006, 190–
400A CT
Bussmann FNQ-
R 3 A, 600 V
Table 4.12 Recommended Supplemental Fuses
4.2.12
Mains Disconnectors
Enclosure
size Power & voltage Type
D A190 380–480 V ABB OETL-NF200A
E A250 380–480 V ABB OETL-NF400A
E A310 380–480 V ABB OETL-NF400A
E A400 380–480 V ABB OETL-NF800A
Table 4.13 Mains Disconnect Part Numbers
4.2.13
Control and CT Cable Routing
Tie down all control wires to the designated control cable
routing. Connect the shields properly to ensure optimum
electrical immunity.
CT connection
Make connections on the terminal block below the active
filter card. Place the cable in the path inside the filter and
secure it with other control wires.
4.2.14 Control Wire Installation
All terminals to the control cables are located on the
control or AFC board.
To connect the cable to the terminal:
1. Strip insulation 9–10 mm (0.4 in.)
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