ESN Type 8900 Potential Protection Device

Special problems are encountered in DC-operated rail ways when it comes to contact and corrosion protection. On the one hand, electrical DC should be kept out of con tact with the ground as far as possible to avoid cor ro sion, on the other hand.

Technical Data

Dimensions

W / H / D see drawing

Housing

Polyester / Makrolon

Attachment

Wall attachment straps

Protection

IP 55

Ambient temp.

-20°C to +70°C

Voltagelimiting device

type 8961

Trigger value

120 V + 20% (bi-directional)

Transient load

see Data sheet part no. 250150

Short-circuit-load

see Data sheet part no. 250150

Monitoring unit Type

type 853800

Power supply

AC 230 V

Power consumption

approx. 3 VA

Measuring input

approx. 1 M?

Adjustment

programing

Output contact

1 change-over contact (potential-free)

 

trigger-delayed approx. 1 min to 108 h

 

voltage            current

 

AC 250 V         4.0 A (cos? > 0.7)

 

DC 110 V         1.0 A (ohmic)

Displays

by LED

Connections

 

Power supply

? 4 mm²

Message contact

? 4 mm²

Earth potential

threaded bolt M16

Ordering Information

Type 8900

Order No. 240100