ABB PASS switchgear substation modules

ABB has announced enhancements to the PASS (Plug and Switch System) range of high-voltage hybrid switchgear modules for substations. The modules are designed to improve safety for operators and electrical maintenance workers by ensuring that high-voltage (HV) equipment in substations can be isolated, earthed and locked out safely and securely.

ABB’s PASS Hybrid modules are now available with an innovative mechanical key interlocking system which ensures it can only be switched in the correct operating sequence. The modules can also be isolated and earthed remotely before personnel enter the substation to perform maintenance tasks. Once inside the substation, operators are then able to perform a simple, error-free, mechanical operating procedure which is carried out at ground level ensuring that the equipment is isolated, earthed and locked out safely and securely.

This safe and simple interlocking system for PASS Hybrid modules allows safe and efficient operation, particularly in the mining industry. The modules perform well in harsh operating conditions as the critical components are encapsulated in a grounded aluminium tank which is filled with pressurised SF₆ gas. This also increases safety as it reduces the need for personnel to interact with the HV equipment for either planned or unscheduled maintenance.

PASS is a family of compact, prefabricated high-voltage modules for substations, providing the flexibility to incorporate the functions of circuit breaker, disconnector and earthing switch and instrumentation current/voltage transformers. It is a 72-420 kV hybrid version of air insulated switchgear (AIS) and gas insulated switchgear (GIS), which is manufactured in ABB’s factory in Lodi, Italy. The compact module can save up to 60% space when compared to conventional substations and possesses a major benefit in extension and/or refurbishment projects.