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TGI joints features of most advanced removable devices with simplicity of fixed equipments- More than a new product TGI is a new removable circuit-breaker concept offering :-
TGI stand for most important innovation’s step of removable circuit-breaker.
Designed for rated normal current and rated short-time withstand current up to 1250 A and 20 kA respectively, it integrates in unique and original way a circuit-breaker to a rotating isolator using an innovative method of vacuum technology’s circuit-breaker and visible isolation.
Isolator is made up of one-case isolated rotating body on which are fitted 6 moving contacts and 6 fixed contact fitted on multifunction insulators. Isolation function has obtained with a rotation of 90°of air isolation’s rotating part (vacuum circuit-breaker inside) as regards to fixed parts of isolator itself.
Vacuum circuit-breaker makes use of axial magnetic field to control arc, that constitutes best advanced technology on breaking field. This isolator-circuit-breaker’s arrange-cement allows to make typical front test of primary distribution and switchboards
TGI’s careful and accuracy design allows that all operations can be per- formed from front panel with panel’s doors closed, guarantying total safety. When it’s in open position and earth connected (earthing switch closed) front panel’s door can be opened. Safety access is guaranteed from segregation between compartments. Segregation between bus-bars compartment and cables box is realized by the circuit-breaker isolator.
Bus-bars compartment is complete with 3 multifunction insulators, on which are fitted the isolator fixing contacts, equipped with capacitor deviders for voltage presence indication.
Cable box is complete with 3 multifunction insulators, on which are fitted the isolator fixing contacts, equipped with capacitor deviders for voltage presence indication and with insulators that include the Current Sensors
Operator’s inter ventions are often in difficult conditions and must be carried out as soon as possible. TGI proposes a real benefit in the interaction bet-ween operator and device. All essential functions to operate are present in an advanced direct way on device’s front panel. A mimic scheme shows directly all functions positions. Synoptic of mimic scheme is mechanical and free from any external power supply.