MEDIUM VOLTAGE SWITCHGEAR COMPONENTS
LBSH LOAD BREAK SWITCHES
LBSH type Load Break Switches are used in HMH series, metal enclosed modular Switchgears. The active sections of the Load Break Switches are present in SF6 gas ambiance closed with sealed pressure system inside the epoxy resin frame. During its normal operation lifespan of 20 years, it does not require any gas refill nor any maintenance. LBSH LBS have three poles and two positions. The earthing switch which quickly closes at the time of short circuit is in SF6 gas environment and inside a resin frame. This feature of the LBSH switch disconnectors offers an additional safety feature for the operating staff. Thanks to the mechanical and electrical interlocking systems between the Load Break Switch and the Earthing Switch, possibility of a wrong-manoeuvre is prevented by these interlocking systems.
USFB CIRCUIT BREAKERS
USFB circuit breakers consist of three pieces of independent poles which contain the fixed and moving contacts where the arc extinguishing process realizes and filled with sf6 gas by impermeability-guaranteed sealed system. Breaker mechanisms works on the principle of releasing the stored energy of a spring. The mechanism can be operated motorized or manually by means of the leverage which comes with the breakers. The USFB circuit breakers with re-closing feature offers the ability to make various mechanical and electrical interlocks by use of the switch disconnector or load break switch. The sf6 circuit breakers used in HMH series Switchgears are designed, manufactured and tested in Ulusoy Electric factory.
RVU SERIES VACUUM CIRCUIT BREAKER
RVU series 12-24 kV vacuum circuit breaker designed by our managers is a three-phase AC indoor breaker with 12-24 kV rated voltage suitable for air insulated switchgear and can be applied in controlling and protecting electrical equipment in industrial and mineral enterprises, power plants and substations. Operation mechanism installed laterally. The product conforms to the IEC 62271-100 standard. Short circuit type tests are performed in KEMA High Power Laboratory in the Netherlands. RVU series provide safe and reliable performance. The embedded poles of RVU’s have the technique of ventilation and convection. Besides the vacuum interrupter has low resistance and high number of short circuit breaking. All of that reduce the power consumption and the temperature rising due to the longtime running of circuit breaker.