Vacuum circuit breaker, vcb is installed in the medium voltage distribution lines to protect life and load equipment. The circuitbreaker is intended for current interruption in the networks with fault. Medium voltage switching devices vacuum circuitbreaker hvx. Vcpw vacuum circuit breaker controls and indicators are functionally grouped on the front control panel, including. The realization of a rapid dc vacuum circuit breaker vcb depends on the. Vacuum circuit breaker or vcb and vacuum interrupter. Vacuum circuit breaker construction, working and its. Ls promec vcb is userfriendly to give more convenience and safety by providing high speed interrupting time 3cycles, adopting the rapid auto reclosing. As time goes on, the size of the vacuum interrupter has reduced from its early 1960s size due to different technical developments in this field of engineering. This technical manual describes transport, assembly, operation and maintenance of the series hvx vacuum circuitbreakers. Secovac vacuum circuit breakers are withdrawable type circuit breakers rated for a voltage of 12kv and a maximum current of up to 4000a for application in indoor. Lsis promec vcb is userfriendly to give more convenience and safety by providing high speed interrupting. The vcb is draw out type and can be racked out directly on the floor.
Abb library is a web tool for searching for documents related to abb products and services. Customers are required to provide relevant switchgear information for customization. The vacuum interrupter technology was first introduced in the year of 1960. Vacuum circuitbreaker on withdrawable part high duty. In vacuum circuit breakers, the vacuum is used as the arc quenching medium. Vacuum circuit breakers are almost maintenance free. The vacuum interrupter houses the contacts and makes up the interrupting chamber. Optimization design of communication circuit parameters in dc vcb. So it has far superior arc quenching properties than any other medium oil in oil cb, sf6 in sf6 circuit breaker.
It requires minimum maintenance compared to other circuit breaker technologies. Vd4 medium voltage vacuum circuitbreaker 12 kv 12504000 a. The vd4 circuitbreakers use a mechanical operating mechanism, with stored energy and free trip. Lsis promec vcb is user friendly to give more convenience and safety by providing high speed interrupting. The vacuum circuit breaker dose not require any other media for arc extinction. Vacuum circuit breakers abb 11 kv vcb panel distributor.
Medium voltage products vd4 medium voltage vacuum circuit. Vacuum circuit breaker vcb principle, construction and. Our range starts from ht 11 kv and upto ht 2 kv vacuum circuit breakers and sf6 breakers. Pdf the results of switching tests of a dc vacuum circuitbreaker designed for rated. Vacuum circuit breaker construction, working and its applicatons. The main characteristics of vacuum circuit breaker are, it interrupts the arc in a vacuum bottle. From small inductive and capacitive load currents up to high short circuit currents, rhg11204.
The vacuum circuit breaker is today recognized as most reliable current interruption technology for medium voltage switchgear. Pdf types of circuit breaker and its application in. These characteristics allow opening and closing operations. Some important characteristics of vacuum circuit breaker are below, the vcb vacuum circuit breaker current rating is up to 3000 amperes. View and download abb vd4 instruction manual online. Center are well coordinated to suit the duties that a circuit breaker must perform.
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