HIGH FREQUENCY SWITCHING TYPE VACUUM CIRCUIT BREAKER FURNACES Toh

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HIGH FREQUENCY SWITCHING TYPE VACUUM CIRCUIT BREAKER FURNACES Toh

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HIGH FREQUENCY SWITCHING TYPE VACUUM CIRCUIT BREAKER FURNACES
Tohiba's Vacuum Circuit Breaker Designed Frequent Switching Operations Furnaces. Developed Based Toshiba's VGB2 Series Breakers, This Breaker Standard Operational Life.
MEDIUM VOLTAGE VACUUM CIRCUIT BREAKER
Series
24kV 36kV
Series Vacuum Circuit Breakers result extensive research development. series draws more than years field proven vacuum interrupter manufacturing design. Toshiba vacuum circuit breakers produced under integrated quality control system ranging from design through production. Vacuum interrupters (the "Heart" vacuum circuit breakers) produced modern "Clean Room" assembled automated High Vacuum Degassing furnaces ensure high reliability.
Standard Features
Extended Service Life expected life expectancy 150,000 times switching load extraordinary. This incomparable service life vacuum circuit breakers. Facilitated Inspection Maintenance Simplified structure eliminated disassembling work breaker unit maintenance inspection, allowing more facilitated maintenance. Smaller Installation Space Required Because switching action vacuum, vacuum circuit breakers inherently smaller lighter than other types breakers. Further, have made circuit breaker more compact than previous breaker series (Type VGB2). Safety Because vacuum quenching does require oil, free from fire hazard ensures safety. Less Noise Since breaker action takes place high vacuum, noise breaking only from mechanical operation breaker. Easy Replacement Conventional Type Breakers more compact than conventional type breakers. using connection adapter, replacing conventional equipment done easily.
MEDIUM VOLTAGE VACUUM CIRCUIT BREAKER
Series
24kV 36kV
External Dimension Vacuum Circuit Breaker
Front View
Rear View
MEDIUM VOLTAGE VACUUM CIRCUIT BREAKER
Series
24kV 36kV
Rating Performance Table Item Type VJB-20M20F VJB-20P20F VJB-30M13F VJB-30P13F Voltage (kV) Insulation Level (kV) AC-50, Impulse-125 AC-70, Impulse-170 Current (*1) 1200 1250 2000 1200 1250 2000 Frequency (Hz) 50/60 Interrupting Current (kA) 12.5 Interrupting Capacity (MVA) Transient Recovery Voltage (kV/µs) Closing (Make) Current (kA) 31.5 Short Time Withstand Current-2s (kA) Opening Time (sec) 0.03 Interrupting Time (cycle) Closing Time (sec) 0.25 Standard Operating Duty min. min. Closing Operation Voltage DC100 Current Closing Voltage Range Opening Control Voltage DC100 Current Opening Voltage Range Mechanical Life (*2) 150,000 Times Electrical Life (*3) 150,000 Times Contact Wipe (mm) Allowable Contact Wear (mm) Number Auxiliary Contacts (*4) 7a-6b (7NO-6NC) Installation Method Floor Mount, Fixed Type Weight (kg/lb) 1146 Applicable Standards JEC-2300
Notes: rating fully guaranteed even housed dustproof cubicle. Replace auxiliary switch, control contacts auxiliary relay after 75,000 operations. Rated interrupting current closed opened times. number auxiliary switch contacts shown externally usable contacts.
WARRANTY
Toshiba shall repair charge defects Vacuum Circuit Breaker which found period 70,000 times opening/closing within years after shipment, whichever shorter, which determined have been caused design workmanship.
OPTIONAL EQUIPMENT
Dustproof Cubicle
breaker located vicinity furnace, where dust particles present, dustproof cubicle provided. vacuum circuit breaker mounted rail cubicle front access doors allow easy inspection. Back panels removed allow inspection charging unit replacement vacuum interrupters. Allow maintenance space front cubicle enable replacing vacuum interrupter drawing breaker from cubicle.
Control Panel
control panel contains parts control power supply unit vacuum circuit breaker, vacuum leak detecting device finding vacuum fault that might occur vacuum interrupter. Parts control power supply include circuit breaker distribution panel, rectifier (when closing operation power AC), capacitor tripping device (when tripping operation power supply AC).
Surge Suppressor
Since furnace needs very frequent open close operations, installing surge suppressor recommended controlling possible ocurrence switching surge. standard surge suppressor prepared connecting load side each phase ground, connection scheme differs system application. furnace flicker compensator installed same system, please contact Toshiba proper connection method.
ACCESSORY PARTS (OPTIONAL)
Adjusting Handle
Used manually closing circuit breaker adjustment.
Gauge
measuring compression wipe spring determining life vacuum interrupter.
SPARE PARTS (OPTIONAL)
following provided spare parts option. Vacuum Interrupter Closing Coil Tripping Coil Auxiliary Switch Control Contactor Auxiliary Relay Lamps
STANDARD SPARE PARTS
following spare parts necessary maintenance inspection supplied with vacuum circuit breaker standard spare parts. Auxiliary Switch Control Contactor Auxiliary Relay Grease

HIGH FREQUENCY SWITCHING TYPE VACUUM CIRCUIT BREAKER FURNACES Toh

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