Details
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.
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Technical Data
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Dimensions
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W/H/D, s. fig., 150 / 200 / 75 mm
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Housing
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Protection system
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IP 50
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Material
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Macrolon
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Ambient temp.
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-20°C to +50°C
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Traction voltage
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DC 600 V / 750 V +20% / -30%
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Power consumption
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approx. 8 W
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Shield voltage
(nominal value at 750 V)
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approx. 40 V at
DC 750V (corre- sponds to 68 k
of test resistance
and
1.12 M of series resistance)
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Switching points
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insulation limit value adjustable
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Insulation
”shield-earth”
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50 - 300 k?
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Insulation
”conductor-
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350 – 1,500
k?
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shield”
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Outputs
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1 relay for voltage fault (quiescent current operation)
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1 relay, fault ”shield-earth”
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1 relay, fault ”conductor-shield”
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Contacts
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2 changeover contacts each (potenti-
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al-free)
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Voltage Current
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AC 250 V 4.0 A
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DC 60 V 0.5 A
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ON delay
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approx. 2.5 s
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Switch-in delay
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fault to earth:
approx. 20 s internal fault: approx. 2 s
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Versions
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Without display
shield interruption
? 8531 00
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With display shield interruption
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? 8531 10
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(as display short ”conductor-shield”)
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With display shield interruption
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? 8531 20
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(as display short ”shield-earth”)
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Accesoirs
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Terminating
resistor see brochure sheet type 853196; Testing unit for
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adjusting and testing purposes see
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brochure sheet type 853299
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Ordering Information
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Type
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Order No.
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8531 00
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510100
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8531 10
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510101
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8531 20
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510102
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