VPT-40.5 indoor AC high voltage vacuum circuit breaker
VPT-40.5 series indoor high voltage vacuum circuit breaker is a new generation of 40.5 vacuum circuit breaker independently developed by our company. The main conductive circuit has two structural forms: insulating cylinder type and solid sealing type. The core component adopts vacuum arc extinguishing chamber. The operating mechanism and the main electric circuit are arranged up and down. The operating mechanism is a new spring operating mechanism with simple structure and reliable action. The product is suitable for three-phase AC 50Hz rated voltage 40.5kV power system, and can be used for industrial and mining enterprises, petrochemical industry, wind power plants, urban infrastructure (such as airports, buildings, subways, etc. and substations as load current, overload current and fault current.
VPT-40.5 series indoor high voltage vacuum circuit breaker has perfect mechanical and electrical interlocking device, and has high operation reliability and service life. It can complete safe power distribution function with suitable switch cabinet to ensure the safety of operators and equipment.
VPT-40.5 series indoor high voltage vacuum circuit breaker parameters in full compliance with GB1984, GB/T11022 and China's power industry standard DL/T403, but also meet the IEC62271-100, IEC56 standards and other major industrialized countries related standards. The product has passed the type test certification of the national authoritative testing organization, which can ensure its safety and reliability.
- Product Description
- Technical features
- Main technical parameters
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- Commodity name: VPT-40.5 indoor AC high voltage vacuum circuit breaker
VPT-40.5 series indoor high voltage vacuum circuit breaker is a new generation of 40.5 vacuum circuit breaker independently developed by our company. The main conductive circuit has two structural forms: insulating cylinder type and solid sealing type. The core component adopts vacuum arc extinguishing chamber. The operating mechanism and the main electric circuit are arranged up and down. The operating mechanism is a new spring operating mechanism with simple structure and reliable action. The product is suitable for three-phase AC 50Hz rated voltage 40.5kV power system, and can be used for industrial and mining enterprises, petrochemical industry, wind power plants, urban infrastructure (such as airports, buildings, subways, etc. and substations as load current, overload current and fault current.
VPT-40.5 series indoor high voltage vacuum circuit breaker has perfect mechanical and electrical interlocking device, and has high operation reliability and service life. It can complete safe power distribution function with suitable switch cabinet to ensure the safety of operators and equipment.
VPT-40.5 series indoor high voltage vacuum circuit breaker parameters in full compliance with GB1984, GB/T11022 and China's power industry standard DL/T403, but also meet the IEC62271-100, IEC56 standards and other major industrialized countries related standards. The product has passed the type test certification of the national authoritative testing organization, which can ensure its safety and reliability. -
1. The circuit breaker structure adopts the overall layout
The spring operating mechanism and the circuit breaker body part adopt the integrated structure design. The primary main electric circuit and mechanism adopt the form of upper and lower layout. The main electric circuit part is located at the upper part of the mechanism, and the spring operating mechanism and handcart propulsion mechanism are located at the lower part of the circuit breaker, with compact structure and reasonable layout;2, better handcart interchangeability and adaptability.
The circuit breaker handcart adopts floor structure design, without transfer trolley, which is convenient for users to carry out on-site maintenance and regular maintenance. The handcart can be easily exchanged and has strong adaptability and wide application range.3. Reliable integrated spring operating mechanism
The spring operating mechanism is a planar spring operating mechanism with manual energy storage and electric energy storage functions. The operating mechanism is placed on the lower side in front of the arc extinguishing chamber. This structural design can not only make the overall size of the whole machine small, but also make the operating performance of the operating mechanism more consistent with the required performance of the arc extinguishing chamber opening and closing, reduce unnecessary intermediate transmission links, reduce energy consumption and noise, and make its operating performance more reliable.4. The main power return system adopts sleeve type or solid seal type structure
The main circuit of VPT-40.5 series indoor vacuum high voltage circuit breaker has two structural forms of insulated cylinder type and solid seal type, which can be conveniently selected by users according to different places of use.
Insulated barrel structure:
The vacuum interrupter of the primary circuit of the circuit breaker is arranged in a closed insulation cylinder, which is made of epoxy resin material with reliable electromechanical performance and formed by advanced APG process. The insulation cylinder not only plays a supporting role in installation, but also plays an interphase role. Relative ground insulation. The design of the insulation cylinder fully considers the national standards and the use requirements of harsh working conditions, which can not only prevent the vacuum extinguishing chamber from the influence of the external environment, prevent dust and foreign matter from entering the main circuit part, but also ensure that even in the hot and humid and serious pollution environment, the voltage effect can also show a high resistance state.
Solid seal structure:
The primary conductive circuit of the circuit breaker adopts a solid-sealed pole with solid insulation technology. The solid-sealed pole directly seals the vacuum interrupter and other parts of the primary conductive circuit in a special ring hydrogen resin material through an advanced automatic pressure gel APGZ process to form a main conductive circuit module. The mounting end of the solid-sealed pole is designed with internal and external double folds, and the pole has a large creepage ratio. High mechanical strength, high precision parts, small number of parts, no secondary adjustment, less overlapping surface characteristics. The electric field distribution of the pole is uniform, which avoids the damage of the organic insulation caused by the local electric field concentration. At the same time, the use of this structural design can greatly simplify the assembly process of the secondary main electric circuit, completely avoid the problem of loosening of the main electric circuit connecting bolts due to vibration in operation, ensure the high reliability of the main electric circuit connection, and make it possible to realize the maintenance-free primary electric circuit of the circuit breaker.5. Flexible installation method
With fixed and handcart type two installation methods, can be very convenient to achieve reliable mechanical "five anti-interlock" can be directly installed in various types of fixed switch cabinet, can also be equipped in various types of removable switch cabinet. -
Table 1. Main Rated Parameters of Circuit Breaker
Serial Number Project Unit Parameters 1 Rated voltage kV 40.5 2 Rated insulation level Rated short-time power frequency withstand voltage (Imin) 95 Rated lightning impulse withstand voltage (peak) 185 3 Rated frequency Hz 50 4 Rated current A 630A. 1250Ax1600Ax2000A. 2500A 5 Rated short-circuit breaking current kA 20 25 31.5 6 Rated short-time withstand current 20 25 31.5 7 Rated peak withstand current 50 63 80 8 Rated short-circuit closing current (peak) 50 63 80 9 Rated short circuit duration S 4 10 Rated operating sequence / O-0.3s-CO-180s-CO 11 Breaking times of short circuit breaking current Times 30 12 Mechanical life 20000 13 Rated capacitor bank closing inrush current kA 12.5 (frequency not more than 1000Hz) 14 Rated breaking current of single capacitor bank A 630 15 Rated back-to-back capacitor bank breaking current 400 Table II. Mechanical Characteristic Parameters of Circuit Breaker after Adjustment
Serial Number Project Unit Parameters 1 Contact stroke mm 20 ±2 2 Contact stroke 6±1 3 Interphase center distance 300 ±1.5 4 Contact closing bounce time ms ≤3 5 Three-phase opening and closing different ≤2 6 Closing time 30-80 7 Opening time 20-45 8 Average switching speed (14mm just after the contact is separated) m/s 1.2-1.9 9 Average closing speed (Ilmm before contact closing) 0.6-1.3 10 Contact opening rebound amplitude mm ≤4 11 Cumulative allowable wear thickness of moving and static contacts 3 12 main conductor circuit resistance Without contact arm μ Q 1250Ax1600A 2000A. 2500A ≤50 ≤40 Including contact arm 1250Ax1600A 2000Ax2500A ≤ 65 ≤55 Table III Technical Parameters of Operating Mechanism
Serial Number Project Unit Parameters 1 Rated operating voltage Energy storage motor V AC220, DC220/DC10, fluctuation range 80% ~ 110 Closing coil Opening coil 2 Power Energy storage motor W 90 Closing coil 368 Opening coil 368 3 Energy storage time S ≤15
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