ESN Type 8531 Cable Monitoring Device

The cable monitoring device type 8531 is suitable for insulation monitoring of cable systems used for traction current supply of direct current railways and trolley busses with nominal voltages of up to 750 V.

Technical Data

Dimensions

W/H/D, s. fig., 150 / 200 / 75 mm

Housing

 

Protection system

IP 50

Material

Macrolon

Ambient temp.

-20°C to +50°C

Traction voltage

DC 600 V / 750 V +20% / -30%

Power consumption

approx. 8 W

Shield voltage (nominal value at 750 V)

approx. 40 V at DC 750V (corre- sponds to 68 k of test resistance and 1.12 M of series resistance)

Switching points

insulation limit value adjustable

Insulation ”shield-earth”

50 - 300 k?

Insulation ”conductor-

350 – 1,500 k?

shield”

 

Outputs

1 relay for voltage fault (quiescent current operation)

 

1 relay, fault ”shield-earth”

 

1 relay, fault ”conductor-shield”

Contacts

2 changeover contacts each (potenti-

 

al-free)

 

Voltage            Current

 

AC 250 V          4.0 A

 

DC 60 V            0.5 A

ON delay

approx. 2.5 s

Switch-in delay

fault to earth: approx. 20 s internal fault: approx. 2 s

Versions

Without display shield interruption

? 8531 00

 

With display shield interruption

 

? 8531 10

 

(as display short ”conductor-shield”)

 

With display shield interruption

 

? 8531 20

 

(as display short ”shield-earth”)

Accesoirs

Terminating resistor see brochure sheet type 853196; Testing unit for

 

adjusting and testing purposes see

 

brochure sheet type 853299

Ordering Information

Type

Order No.

8531 00

510100

8531 10

510101

8531 20

510102