Armature Fuses - Lenze 4800 Manual

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Accessories
13.1.2
Type
4902
4903
4904
4905
4906
4907
4X08
4X09
Type Type
4902
4903
4904
4905
4906
4907
4X08
4X09
13-4
48XX/49XXSHB0399

Armature fuses

Armature fuses protect the thyristors of the controller from feedback of the motor
in generator mode.
When using AC fuses as armature fuses, the max. operating voltage of the
semi-conductor fuse is restricted, because of the time constant L/R of the
armature circuit.
Therefore, the rated fuse voltage of the following fuse type is considerable higher
than the voltage of the phase fuses recommended.
Max. perm. fuse size for the armature circuit (F'4)
Mains voltage
Fuse type
FF 40 A
(27 x 60)
FF 50 A
(27 x 60)
FF 100 A
(27 x 60)
FF 250 A
(01.110)
FF 315 A
(01.110)
FF 400 A
(02.110)
FF 550 A
(03.110)
FF 800 A
(03.110)
TAB 3 Assignment of max. armature fuse size to the controller
1
DC fuse
Recommended armature fuse size (F'4) when I Recommended armature fuse size (F 4) when I
Mains voltage
Fuse type Operating class
FF 20 A
(14 x 51)
FF 32 A
(14 x 51)
FF 80 A
(22 x 58)
FF 125 A
(00.80)
FF 200 A
(00.80)
FF 315 A
(00.80)
FF 500 A
(02.110)
FF 700 A
(02.110)
TAB 4 Assignment of armature fuses to the controller when I
+0%
$
550V +0%
Operating class Order designation
EFSCC0400AYJ
1
EFSCC0500AYJ
1
EFSCC1000AYJ
1
aR EFSFF2500AZR
aR EFSFF3150AZR
aR EFSFF4000AZR
aR EFSFF5500AZR
aR EFSFF8000AZR
= I = I of the controller of the controller
$
Amax Amax Arated Arated
460V +0%
Order designation
aR EFSFF0200AYH
aR EFSFF0320AYH
aR EFSFF0800AYI
aR EFSFF1250AXL
aR EFSFF2000AXL
aR EFSFF3150AXL
aR EFSFF5000AZR
aR EFSFF7000AXP
Amax
Fuse holder
Order designation
EFH30005
EFH30005
EFH30005
EFH10003
EFH10003
EFH10003
EFH10003
EFH10003
Fuse holder Fuse holder
Order designation
EFH10002
EFH10002
EFH30006
EFZ0003
EFZ0003
EFZ0003
EFH10003
EFH10003
$
= I and at a mains voltage of
Arated
460V