ESN Type 8531 Cable Monitoring Device

ESN

Product Code: Type 8531
Brand: ESN



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Description for 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

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