Potential protection unit with low voltage limiter, surge arrester current monitoring and remote clearing function
There are special problems with railways operating with DC power concerning contact and anti-corrosion protection and overvoltage protection (e.g. lightning)
Technical data
Dimensions
WxHxD see figure
Housing
Polyester / Makrolon
HxWxD: 302x186x181mm
Attachment
Wall fastening brackets
Mast attachment (as accessory,
Part No. 240110)
Type of protection
IP 55
Ambient temperature
-20°C to +70°C
Low-Voltage-Limiter
type 8961
Trigger value
120V (bidirectional)
Shock loading
? 60kA (8/20 ?s standard puls)
Resistance to short-
? 5 kA for max. 250ms
circuits
Current sensor
type 8546
Trigger value
? 15 A (polarity-independent)
Supply voltage
DC 24 V (18 -
30VDC)
Load-Output
1 electronic output
voltage: 24VDC
load current: max. 200mA
output will be clamped until reset
Function display
two light emitting diodes (LED‘s)
green LED: power on
orange LED: switched on
Reset Input
24VDC, reset output
Connections
Supply voltage
? 1,5 mm2
Load-Output
? 1,5 mm2
Reset Input
? 1,5 mm2
Earthing potentials
Threaded bolt M16
Ordering information
Type
Part No.
type 8901,
240130
with low
voltage limiter,
surge arrester
and
current sensor
