ESN Type 8901 Potential Protection Unit with SIEMENS Low Voltage Limiter and Surge Arrester

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 8WL6503 (SIEMENS)

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,

240140

with low voltage limiter,

 

surge arrester and

 

current sensor