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Text artwork 990-9030 Rev. A. Equipment Handbook for the Low Voltage Disconnectors series Page 5 of 20
SECTION 2: SPECIFICATION
INPUT
1 The input voltage is -54.5 V dc nominal from an external power system.
OUTPUT
2 The output voltage is -54.5 V dc nominal.
MECHANICAL
3 The units are housed in grey plastic boxes of dimensions 366mm wide x 193 mm deep x 470mm
high. External busbars for input and output connections are provided on 15000264.
WEIGHT
4 The weight of the units are 15 kg.
OPERATIONAL TEMPERATURE
5 The operational temperature is -5 °C to +50 °C.
OPERATIONAL HUMIDITY
6 The operational relative humidity is 5% to 95% non-condensing.
SAFETY STANDARDS
7 The units are for use in conjunction with telecommunications apparatus and are designed to meet the
standard BS EN 60950 specification for safety of information technology equipment, including
electrical business equipment.
ALARMS
8 One set of volt free change over contacts are provided on a terminal block (TB1) to indicate the state
of the contactor.
9 The input and output sides of the fuse can be monitored via a 27kΩ resistor on TB2