USV 4

Power supply unit Type USV 4.2 d
DMT 01 ATEX E 062
ex I M2 Ex e mb [ia Ma] I Mb
ex I M1 Ex ia I M
ex II 2G Ex e mb ib [ia Ga] IIA T4 Gb
ex II 1G Ex ia IIA T4 Ga
BVS 09 ATEX E 017 U
ex I M2 Ex d I

This power supply unit of the type USV 4.2 d supplies the needed electrical energy to the electronic operating systems for the coal industry which have been approved to the explosion protection rating “intrinsically safe“. This unit is connected directly to the alternating
current supply (AC).

When the power supply is switched off because of high gas concentration, the two sealed lead acid accumulators of this unit, which do not have a memory effect, maintain an uninterrupted supply of power to the connected equipment.

The sealed electronic unit of the device (explosion protection rating “m”) is mounted in a die cast housing with the explosion protection rating “d”.

The die-cast cover is revolving and makes the installation of the device easier.

Three intrinisically safe outputs with a common minus terminal are available. The output 1 has been designed especially for supplying the WOELKE methanemonitoring
system GAMEX II.

In model type USV 4.2 d, the unit is supplied with 42V or 100V or 230V or 660V AC. If required models with other supply AC voltages can also be delivered.

For monitoring the power supply and the charge status of the accumulators at the safety control room, two optocoupler outputs are available in the USV 4.2 d unit. This can be connected to a remote transmission system equipped with an intrinsically safe data input.

Dimensions of the unit:
Height 530 mm, Width 330 mm, Depth 185 mm.
The weight of the unit is 42 kg.

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