Switchgear NEX. Design

NEX Cubicle corresponds to the requirements of IEC 60298. 

• Relay protection and automatics compartment with Sepam or MiCom (upon Customer’s requirement), energy monitoring and accounting units, terminal blocks and other auxiliary circuits equipment; 
• Switching device compartment. Compartment includes withdrawable part (circuit-breaker, disconnector truck or earthing truck), moving metal shutters that close automatically upon circuit-breaker/disconnector/earthing switch transfer from operation to control position; 
• Cable compartment. Compartment includes cable inputs, earthing switch, power-on indicator unit, current transformers, voltage transformers; 
• Busbars compartment. Compartment includes copper busbars, bushing insulators. 

Each compartment (except for relay protection compartment) has its own gas disposal channel. 

All metal parts of the cubicle are connected to earth: 

• frame and doors of the cubicle; 
• withdrawable part (circuit-breaker, disconnector truck or earthing truck) and voltage transformers ‐ in accordance with technical requirements; 
• cable inputs, earthing disconnector, current sensors and voltage transformers as required. 

NEX guarantees a high level of protection of people owing to advanced interlock system. The low voltage auxiliaries and monitoring unit are in a relay protection and automatics section separated from the high voltage section.