Bardac PLX - 14.3.3 DC semi-conductor fuses

206 Installation
14.3.3 D C semi-conductor fuses
For PLX units used in applications in which regeneration occurs for most or all of the time, it is recommended
to fit a D C side semi-conductor fuse. This will further protect the unit in the event of an unsequenced pow er
loss when regeneration is taking place
Note. It is not normally necessary to use DC fuses with the PL Models but if required then these fuses can be
used. Example. A *PL model that allo ws regenerative stopping is employed on a site that suffers from a
higher than normal amount of po w er brown outs or blackouts.
BUSSMA N EU Ferraz Sha w mut Max cont
Current
(A MPS)
Model
PL 2Q
PLX 4Q
IP
A C
OP
DC
DC fuse
max
I
2
t
Up to
500 V DC
Rating I
2
t Buss part no size
Up to
500 V DC
UL
Rating I
2
t Ferraz part no size
PL/X 5 10 12 600 16A 48 170M15 59 1 35A 360 A 50 QS35-4 1
PL/X 10 20 24 600 32A 270 170M 1562 1 35A 360 A 50QS35-4 1
PL/X 15 30 36 600 40A 270 170M 3808 1 40A 460 A 50QS40-4 1
PL/X 20 40 51 5000 63 A 770 170M 3810 1 60 A 1040 A 50 QS60-4 1
PL/X 30 60 72 5000 80 A 1250 170M3811 1 80A 1900 A 50QS80-4 1
PL/X 40 80 99 5000 125A 3700 170M38 13 1 100 A 2900 A50QS100-4 1
PL/X 50 100 1 23 11850 160 A 7500 1 70M3814 1 1 25 A 5000 A 50 QS150-4 1
PL/X 65 124 1 55 60000 200 A 15000 1 70M3815 1 20 0 A 13 000 A 50 Q S200-4 1
PL/X 85 164 2 05 60000 250 A 28500 1 70M3816 1 25 0 A 24 000 A 50 Q S250-4 1
PL/X 115 216 270 1 28000 315 A 46 500 170M38 17 1 350 A 47000 A 50 QS350-4 1
PL/X 145 270 330 1 28000 400 A 10 5000 17 0M3819 1 4 00 A 6 1000 A 50 QS400-4 2
PL/X 185 350 430 2 40000 500 A 14 5000 17 0M5810 2 5 00 A 9 7000 A 50 QS500-4 2
PL/X 225 435 530 2 40000 550 A 19 0000 17 0M5811 2 6 00 A 1 40000 A 50 QS60 0-4 2
PL 2 65 520 6 30 306 000 630A 2 7500 0 170M5 812 2 Consult Ferraz Sha wmut.
Plea se also refer to Part 3 PL/X 275-980 for extra details of frame 4 and 5 high power dri ves.
The above fuses are specified for operation up to 500V DC for armature circuit time constants up to 10mS.
The table below gives maximum typical operating voltage for various time constants. (inductance/resistance)
Please refer to the fuse manufacturers data for further information
Maximum working DC voltage Maximum allo wable time constant
500 10mS
450 20mS
400 30mS
380 40mS
360 50mS