ESN
ESN Type 8901 Potential Protection Device for Floating Grounds with Current Control
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Protection from contact voltage and corrosion present a particular problem in the case of DC powered railway vehicles. On the one hand, direct electrical currents should not be connected to ground in order to prevent corrosion, but on the other hand, strict electrical separation can result in hazardous voltage potentials between the two areas.
Technical Data
Dimensions
WxHxD see illustration
Housing
Polyester / Makrolon
Mounting
Wall mounting tabs
Strap mounting
Protection class
IP 55
Ambient temperature
-20ºC to +70ºC
Voltage fuse
type 8961 (part-no. 250150)
Threshold
120V ±20% (bi-directional)
other threshold voltages available
Impulse current
60kA (8/20?s)
Short-circuit capability
5kA (? 250ms)
Current relay
type 8546
Threshold
> 15 A (polarity independent)
Supply voltage
AC 230 V , DC 24V
Output contact
1 change-over contact (potential
free)
Voltage Current
AC 230 V 4.0 A
DC 110 V 0.5 A
Function display
LED
Functions
1 x button
button not pushed: memory
button fixed pushed: no memory
button pushed: reset memory
Connections
Supply voltage
4 mm2
Signal contact
4 mm2
Ground potential
M16 threaded bolt
Ordering Information
Type
Order No.
8901
240123 - AC 230V version
240124 - DC 24V version
240125 - AC + remote reset
240126 - DC + remote reset
Voltage fuse (VLD) separately:
240198 - DC 24V without VLD
240199 - AC 230V without VLD
