General Technical Data (Maximum Values) and Requirements of Vacuum Circuit- Breaker Sample Clauses

General Technical Data (Maximum Values) and Requirements of Vacuum Circuit- Breaker. Rated voltage Ur 12 kV Operating voltage Ur 10 kV Rated insulation level: Rated short-duration power-frequency voltage Ud 28 kV Rated lightning impulse voltage Up 75 kV Rated normal current for feeders Ir 400/630 A Rated short-time withstand current Ik 20/25 kA Rated peak withstand current Ip 50/63 kA Rated short-circuit breaking current ISC 50/63 kA Rated short-circuit making current Ima 50/63 kA The vacuum circuit-breakers shall be designed to withstand 10,000 mechanical operating cycles resp. 50 breaking operations at rated short-circuit breaking current. It has to be possible to equip the secondary part individually. Application for Circuit-breaker switchgear, utility substations Transformer circuit-breaker, simple packaged substations (without auxiliary voltage) Mechanism type stored-energy ON – stored- energy OFF spring-operated ON – stored-energy OFF Operation motor operation hand operation hand operation with hand crank With secondary release as: shunt release or – if designed with c.t. operation - as c.t.- operated release (low energy) With auxiliary switch (standard): free contacts for customer applications, according to secondary equipment: 2NO + 2NC + 2 changeover Closing solenoid, for: “remote” electrical with with - operation Mechanical indication „stored-energy ON – spring charged“ with with - Mechanical pushbutton for operation: ON/OFF OFF Operating cycle counter: with The version as “stored-energy ON-stored-energy OFF” motor operating mechanism (=stored- energy spring mechanism) shall be suitable for the following switching duties as per IEC 60056 / VDE 0670: - U (= synchronisation and rapid transfer) - K (=auto-reclosing) : 0 – 0.3 sec – CO – 3 min – CO - Multiple auto-reclosing For the application as transformer circuit-breaker, a manual “spring-operated ON – stored- energy OFF” mechanism shall be available. The closing spring of the circuit-breaker has to be charged with a hand crank until the circuit- breaker closes. The transformer protection shall be implemented with a system protection consisting of: 1 transformer set mounted on the cable connection as three-phase current transformer set 1 protection relay with a tripping characteristic similar to a HV HRC fuse
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