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ABB’s new 72.5kV plug and switch system

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ABB has released its new PASS (plug and switch system) M00 72.5kV hybrid switchgear.

The PASS concept is a hybrid of ABB's traditional air insulated (AIS) and SF6 metal-clad gas insulated (GIS) switchgear units designed as self-contained switching modules suitable for use in outdoor substations.

It requires just one 700mm x 700mm foundation block for the bay.

Now available after completing type testing, the PASS M00 module retains all the characteristics of ABB's M0 145kV module, and has been adapted for lower voltage substations.

It is normally delivered completely assembled as a "72kV bay in a box". Each module is compact, energy-efficient, easy to install and virtually maintenance-free.

In an innovative design, the line and busbar disconnectors, as well as the earthing switches, are integrated in the breaking chamber.

This gives these components complete immunity from all environmental conditions, thereby ensuring lifelong reliability, and eliminating routine maintenance of high voltage parts. Thus overcoming a major weakness of AIS substations.

Standard functions include current measurement, current interruption, disconnecting and earthing on both sides of the breaker, all of which can be customised.

Specifications are: voltage 72.5kV; frequency 50/60Hz; current 2000A; L.I. withstand voltage 325kV; P.F. withstand voltage 140kV; short time withstand current (3s) 31.5kA; peak withstand current 80kA; temperature range -40°/+55°C.

The PASS M00 will be featured on the ABB stand at the upcoming Distribution 2003 exhibition being held in Adelaide from 16-19 November.

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