Rmu MID-Set Type Metal-Clad Metal-Enclosed Switchgear

RMU MID-Set Type Metal-Clad and Metal-Enclosed SwitchgearProduct overviewKYN28A-12(GZS1-12Z) mid-set type metal-clad and metal-enclosed switchgear (hereinafter referred to as switchgear) is anew type product designed and developed by our company with domestic and international advanced technologies, it is anideal upgrading product for replacing the old metal-enclosed switchgear such as KYN1-10, JYN2-10, GBC-10 and so on. Itsadvantages as follows:  The cabinet shell is made of al-zinc-coated steel sheet, through CNC processing and multiple bending technique, then    assembled with bolts. It is featured with high mechanical strength, neat and elegant appearance, powder coating treateddoor, good shock and corrosion resistance. Ingress protection level of the shell reaches IP4X.  Main switch of switchgear can be configured with VD4 vacuum circuit breaker and C3 series fixed type load switch from ABB corporation, also can be configured with many homemade vacuum circuit breakers (such as VS1, VH1, VK, ZN28) instead of overseas similar products.  No matter which circuit breaker selected, make sure that the air insulation distance of its bare conductor is larger than125mm, and compound insulation is larger than 60mm. The breakers are featured with long service life, high parameters,less maintenance, small size, etc. This switchgear is applicable for three-phase power grid of AC 50Hz and class 3.6~12kV, used for electric energy receivingand distribution, it controls, protects and monitors the circuits, can be used in single bus and single-bus segment system ordual-bus systems. This switchgear complies with IEC298 Alternating-current metal-enclosed switchgear and controlgear forrated voltage above 1kV and up to and including 52kV , IEC694 Common specifications for high-voltage switchgear and controlgear, GB3906 Alternating-current metal-enclosed switchgear for rated voltage of 3~36kV, DL404 Indoor AC high voltage switchgear panel, DIN.VDE0670 Alternating-current switchgear for rated voltage above 1kV, etc. It enjoys perfect and reliable anti-misoperation function. Technical parametersTechnical parameters of switchgearItem  UnitDataRated voltageRated frequency Rated current of circuit breakerRated current of switchgearRated peak withstand current (4s)Rated peak withstand current (peak)Rated short-circuit breaking current Rated short-circuit making current (peak) KV Hz A  A   KA        KA  KA KA 3.6,7.2,12       50       630,1250,1600,2000,2500,3150,4000        630,1250,1600,2000,2500,3150,4000        16,20,25,31.5,40,50,63        40,50,63,80,100,125,160        16,20,25,31.5,40,50,63        40,50,63,80,100,125,160 Rated insulation level1min power frequency withstand voltage       Lightning impulse withstand voltage KV   KV  24 40 32 60 42 75 Protection classThe shell is IP4X, and it is IP2X when the compartment door and circuit breaker chamber door are opened Technical parameters of VD4 and VS1-12 vacuum circuit breaker Item Unit DataRated voltageRated frequencyRated current of circuit breakerRated peak withstand current (4s)Rated peak withstand current (peak)Rated short-circuit breaking currentRated short-circuit making current (peak) KV       Hz       A        A        KA        KA         KA        KA 3.6,7.2,12       50       630,1250,1600,2000,2500,3150,4000        16,20,25,31.5,40,50,63        40,50,63,80,100,125,160        16,20,25,31.5,40,50,63        40,50,63,80,100,125,160Rated insulation level1min power frequency withstand  KV       KV 42 75Rated operating sequenceRated short-circuit current breaking timesMechanical life         Times       TimesO-0.3s-CO-180s-CO       50       2000Mechanical characteristics of VD4 and VS1-12 vacuum circuit breaker When the circuit breaker is used to control the motor of 3~10kV, must apply metal-oxide arrester if the starting current is smaller than 600A, details should be determined by both users and manufacturer through negotiation. When the circuit breaker is used to disconnect the capacitor bank, rated current of the capacitor bank should not exceed 80% of rated current of circuit breaker.Item UnitDataClearance between open contactsOvertravelPhase-to-phase central distanceClosing contact bounce timeThree-phase opening asynchrony mm       mm       mm        ms        ms 11±1       4±0.5        210±0.5,250±0.5,275±0.5         ≤2        ≤2Breaking time at operating voltage of  Max       Rating  Min ms       ms      ≤50       ≤50       ≤60Closing timeAverage closing speedAverage closing speedConductive circuit resistanceContact pressure  ms       m/s       m/s        μΩ        N      ≤100       0.9-1.2       0.6-0.8        ≤40        3200±100Technical parameters of operating mechanism Item  UnitValue Rated operating voltage Closing coil V DC220,110 Closing coil V DC220,110 Coil power Closing coil W 245 Closing coil W 245Power of energy-storage motorRated voltage of energy-storage motorEnergy-storage time W       V       S 50       DC220,110   ≤10Main technical parameters of