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

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

BRAND : ESN

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

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Description

Description

Details

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