ESN Type 8901 Potential Protection Device for Floating Grounds with Current Control

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

Potential Protection Device for Floating Grounds with Current Control