bokr elec

SF6 gas insulated switchgear in all-insulated cabinet. This SF6 switchgear has high quality with best wholesale price and considerate after-sale service. Rated voltage options:10kv, 20kv, 35kv, rated current options: 400A, 630A and 1250A.

KYN28-12 drawout type indoor metal-enclosed switchgear assemblies. best price with high quality. We also can make according to your design OR mind.

rated voltage:10kv,20kv,35kv. rated current: 630A,1000A. 1250A, 1600A,2000A, 2500A,3150A,4000A.

SF6 gas insulated switchgear in all-insulated cabinet. This SF6 switchgear has high quality with best wholesale price and considerate after-sale service. Rated voltage options:10kv, 20kv, 35kv, rated current options: 400A, 630A and 1250A.

Mini European type compact substation

Main Function And Features 

Small volume, compact structure reliable power supply and easy for installation; it can realize single power supply, double power supply, or ring net supply with double-fuse protection, low running cost.The casing surface is treated by electrostatic painting and has good wearing resistance. It is applicable to both ring network and single/double power supply, is convenient  for shifting and can enhance the reliability of power supply. The transformer  adopts environment-friendly S11 series spiral core, non-excited voltage regulation, full-enclosed type, featuring energy saving and low noise. The amorphous alloy transformer is also available if required by clients. HV load switches and protective fuse are placed in oil filled iron tank, and the tank is full-enclosed structure. The LV room is provided with watt-hour meters, voltmeters and breakers of four outgoing lines, reactive power compensation can also be provided if necessary. It uses S11 series spiral core transformer, its idle loss is 30%~40% lower than S9, and noise 7~10dB lower than S9.

Compared with traditional substations, the Mini substation offers several unique advantages. Conventional substations are generally large, heavy, and require significant land area, which often makes them unsuitable for crowded urban environments or sites with strict space limitations. Their installation and transport usually involve specialized trucks, cranes, and complex logistics, increasing both cost and handling risk.

In contrast, the Mini substation is designed with a compact footprint and reduced overall volume, allowing it to be installed in areas where standard substations would simply not fit. Despite its smaller size, it still delivers all essential functions—including transformation, protection, switching, and control—ensuring no compromise in performance. Its lightweight and modular structure makes it much easier to transport and install, often without the need for oversized vehicles or heavy lifting equipment.

Ultimately,the Mini substation provides a flexible,efficient,and safer alternative,especially for urban projects,temporary installations, and distributed energy systems, where space and convenience are critical.

Mini electrical substation includes, 

(1)Medium voltage compartment, (2)Low voltage compartment (3) transformer compartment.

 Technical parameter.

E-house/Control system station

An E-house (electrical house) in a power system is a prefabricated, modular, and mobile enclosure that houses critical electrical equipment, such as switchgear, control systems, and transformers, for power distribution and automation. Built in a factory-controlled environment and pre-tested, these "plug-and-play" units are shipped to a site for rapid deployment, offering a quick, flexible, and cost-effective alternative to traditional on-site substation construction.

Mini European type compact substation 10kv 20kv 35kv with best price and high quality.
Outline size:2500*1600*1700mm. In small volume,easy to install and transport. Meet standard IEC1330, M.V.standard IEC62271-200.
1.High voltage side 10KV 20KV 35KV
2.Low voltage side 0.4kv 0.69kv
3.Transformer 100kVA~600kVA.

American style 11kv electrical substations

Small volume, compact structurem reliable power supply and easy for installation; it can realize single power supply, double power supply, or ring net supply with double-fuse protection, low running cost.The casing surface is treated by electrostatic painting and has good wearing resistance.

European type compact substation 10kv 20kv 35kv

Outdoor type,easily install and maintenance,high quality with best price.

1.High voltage side 10KV,20KV,35KV 2.Low voltage side 0.6KV,0.4KV 3. transformer 50kva~3150kva

meet standard: IEC1330 ,M.V.standard IEC62271-200. LV side IEC 60439

low-voltage isolation transformer with a voltage rating of 0.4/0.23 kV is a specialized electrical device
designed to provide galvanic isolation between two circuits. It is commonly used in industrial, commercial,
and residential applications to ensure safety, reduce electrical noise, and protect sensitive equipment from
voltage fluctuations or surges.
The primary function of this transformer is to step down the voltage from 0.4 kV (400 V) to 0.23 kV (230
V) while maintaining complete electrical isolation between the input (primary) and output (secondary)
windings. This isolation prevents direct electrical contact, reducing the risk of electric shock and improving
overall system safety. Additionally, it helps eliminate ground loops, which can cause interference in sensitive
electronic devices.
Constructed with high-quality materials, the transformer features a robust core made of laminated silicon
steel to minimize energy losses and ensure efficient operation. The windings are carefully insulated to
withstand high temperatures and provide long-term reliability. The design also incorporates thermal protection
mechanisms to prevent overheating under heavy loads.

The on-load tap-changing (OLTC) oil-immersed transformer is a critical component in power distribution
systems, designed to regulate voltage levels while maintaining continuous power supply. This type of
transformer is equipped with a tap changer that adjusts the winding turns ratio under load, ensuring stable
output voltage despite fluctuations in input voltage or load conditions. The 35/0.4 kV rating indicates it
steps down high-voltage electricity from 35 kV to low-voltage 0.4 kV, making it suitable for industrial and
commercial applications.
The transformer's core is typically made of high-grade silicon steel, minimizing iron losses, while the windings
are constructed from copper or aluminum to reduce copper losses. The OLTC mechanism allows for real-time
voltage adjustment, usually within a range of ±10% to ±15%, ensuring optimal performance and compatibility
with various load requirements. This feature is particularly useful in areas with unstable grid conditions.
Insulation is a key aspect of its design, with the windings immersed in mineral oil to enhance cooling and
insulation properties. The oil also acts as a dielectric medium, preventing internal arcing and extending the
transformer's lifespan. Additionally, the transformer is equipped with protective devices such as Buchholz
relays and pressure relief valves to ensure safe operation.

Low Voltage Withdrawable Switchgear Series

The switch cabinet is applied to the distribution system in the power plants, high-rise buildings, chemical industry, and petroleum, metallurgy and textile industries. In the large power plants and highly automated petroleum and chemical industries that require connecting with computers, it is used, as a complete low-voltage distribution equipment,.

CKJ5 is a high pressure vacuum contactor. ‌ CKJ5 series vacuum AC contactor is mainly used in AC 50Hz, rated working voltage to 1140V, rated working current to 630A circuit, for long-distance connecting and disconnecting circuit ‌.

JCZ5-12 vacuum contactor is suitable for AC 50-60Hz main circuit rated working voltage of 7.2kV, 12kV, rated current of 630A below the power network for remote connection and breaking and frequent start and control of AC motor, more suitable and fuse and various protection devices to replace the vacuum circuit breaker.

1. JCZ5 vacuum contactor is composed of insulation frame, metal base, transmission arm, electromagnetic system, auxiliary switch and vacuum arc extinguishing chamber. When the electromagnetic coil passes the control voltage, the armature drives the crank arm to turn, so that the main contact in the vacuum interrupter room is connected, and the main contact is broken after the electromagnetic coil is powered off due to the action of the opening spring.
2. The vacuum arc extinguishing chamber is composed of an upper cover, a lower cover, a metal bellows and a ceramic tube. The shell is made of corrugated porcelain tubes made of 95 porcelain insulating materials. It has the characteristics of large creepage distance, high mechanical strength, heat resistance and impact resistance.

3, the electromagnetic system considers the actual suction characteristics and reaction characteristics of good coordination, as well as the contactor to play the advantages of low noise and power saving, the use of DC double coil by starting and maintaining two windings,

4, mechanical lock: when the closing coil is energized, the contactor is closed, the mechanical lock is locked, when the trip coil is energized, the mechanical lock is released, the contactor is released, the trip coil is in a hot state, the voltage is in the range of Ue85%-110% to make the contactor reliable release.

The main function of the high-pressure vacuum contactor is to operate the large load current frequently, especially suitable for harsh environment and flammable and explosive dangerous places.

The working principle of the high pressure vacuum contactor is similar to that of the low pressure contactor, the contactor is drawn by charging the coil, and the contactor returns when the coil is out of power. The main difference is that the high-pressure vacuum contactor can be operated on and off in a vacuum environment, and the vacuum arc extinguishing chamber is used to extinguish the arc, which is suitable for the on-off of high voltage and large current.

The high voltage vacuum contactor is designed to operate without protection, similar to the switch on a household light, it cannot disconnect the short circuit current, so it is often used in conjunction with a high voltage vacuum circuit breaker to provide more comprehensive circuit protection. Because of its small size, light weight, frequent operation and other characteristics, this equipment is widely used in a variety of frequent operation fields, including power system, metallurgy, mining, rolling stock, rail transit and other industries of high voltage equipment, to ensure the safety of equipment and personnel.

BKZC(R)-12 Indoor vacuum contactor 12KV (Drawout)

Vacuum AC contactors utilize vacuum bottle encapsulated contacts to suppress the arc. This arc suppression allows the contacts to be much smaller and use less space than air break contacts at higher currents. As the contacts are encapsulated, vacuum contactors are used fairly extensively in dirty applications, such as mining.

Vacuum contactors are only applicable for use in AC systems. The AC arc generated upon opening of the contacts will self-extinguish at the zero-crossing of the current waveform, with the vacuum preventing a re-strike of the arc across the open contacts. Vacuum contactors are therefore very efficient at disrupting the energy of an electric arc and are used when relatively fast switching is required, as the maximum break time is determined by the periodicity of the AC waveform.

Can be use in KYN28-12 medium voltage metal clad drawout type switchgear assemblies.

BKV3-12GD indoor type of VCB with disconnector&grounding 12KV

BKV3-12GD series indoor high-voltage vacuum circuit breaker(3 positions) has excellent electrical and mechanical properties, reliable and stable mechanism, long life. The main circuit adopts solid sealing pole, which improves the environmental adaptability and insulation reliability of the circuit breaker. Reliable mechanical and electronic performance and extended mechanical and electronic life make maintenance-free circuit breakers possible. It can be used in 3.6-12kV power system, as a power grid equipment, industrial and mining enterprises power design protection box control unit, suitable for a variety of different nature of the load and frequent operation, multiple times to break the short-circuit current occasions. The product has a perfect mechanical and electrical interlocking device, with high operational stability and reliability, to ensure the safety of operators and equipment, to ensure the safety of electricity.

ZN28-12 Indoor vacuum circuit breaker is a three-phase AC 50Hz high-voltage indoor switchgear. The product conforms to,. The integrated structure is the basic ZN28-12T; Split structure ZN28-12T series vacuum circuit breaker rated voltage 12kV, three-phase AC 50Hz high voltage indoor switchgear.

ZN28-12 series vacuum circuit breaker main function is used for line infrequent conversion and motor infrequent start, especially suitable for power plants, substations and other transmission and distribution system control or protection switch, especially suitable for breaking important loads and frequent operation places. ‌

The circuit breaker is suitable for three-phase AC 50Hz, rated voltage 12kV indoor high voltage environment, can effectively protect the electrical facilities and control the operation of the electrical equipment.‌

Environmental conditions:

1. Altitude: the altitude does not exceed 2000m;
2. Ambient temperature: no higher than +40℃, not lower than -25℃;
3. Relative humidity: the daily average does not exceed 95%, and the monthly average does not exceed 90%;
4. Earthquake intensity: no more than 8 degrees;
5. Locations without fire, explosion hazard, serious contamination, chemical corrosion and severe vibration.

Technical parameters

 ZN12 (ZN72) -40.5 Indoor Vacuum Circuit Breaker 35KV three-phase AC 50HZ applied to power system, the circuit breaker for the ceramic structure, using the longitudinal magnetic field contacts, is small, the proliferation of breaking arc generated when current distribution in the contact on the same local melting phenomenon does not occur, but also has a low arc energy voltage (20-200V) and low chopping current (4-5A), and operate with high reliability organizations.

ZN85-40.5 series indoor vacuum circuit breaker is suitable for indoor high voltage equipment with rated voltage of 40.5kV and three-phase AC 50Hz. It can be used as industrial and mining enterprises, power plants and substations as load current, overload current and short circuit. For current use, it is suitable for frequent operation.

Can be use in KYN61-40.5 type of metal clad medium voltage switchgear assemblies.

FZW32-12 Outdoor Vacuum Load Break Switch 12kv

FZW32-12/T630-20 type outdoor high voltage isolated vacuum load switch (hereinafter referred to as the load switch) is a three-phase AC 50Hz, rated voltage 12kV outdoor high voltage switch equipment, suitable for breaking, closing urban or rural distribution system load current and fuse break transfer current. Equipped with motor mechanism and controller can be used as line breaker or automatic breaker. Due to the use of new insulation structure design and vacuum arc extinguishing chamber, the load switch has obvious fracture after breaking, and has the function of isolation switch, in addition to the breaking capacity is large, no oil, so no pollution to the environment, no explosion risk, long electrical life and maintenance free.

FZW28-12 Outdoor Vacuum Load Break Switch 12kv

The FZW28-12 vacuum load switch is suitable for three-phase AC distribution systems with a rated voltage of 12KV and a rated frequency of 50Hz, used for opening and closing load currents and closing short-circuit currents.This product uses vacuum arc extinguishing and SF6 gas as the insulation medium to ground and between phases, and has good sealing performance.It is a maintenance free product..Suitable for protection and control in substations, industrial and mining enterprises, as well as urban and rural power grids, especially suitable for automated distribution networks in urban and rural power grids and places with frequently operations.

AB-3S-12 630-25 outdoor vacuum circuit breaker 12KV

AB-3S-12 series circuit breaker is a new generation of intelligent vacuum circuit breaker on the column developed by our company, integrating advanced technology at home and abroad, taking advantage of the strength of many families, adopting a new design concept and using high -tech means. The product can be used as the switch of 10kV side and 10kV outlet of main transformer of 35kV substation, as well as the switch on the column of distribution network. It can easily realize control, protection, measurement and communication when combined with various control units produced by the company. It is the preferred equipment for realizing automation and miniaturization of distribution network.

ZW10-12/630-20 high voltage dual power switching device (hereinafter referred to as the device) is composed of a high voltage vacuum circuit breaker and intelligent controller two parts. Applied to AC 50 Hz, rated voltage 12kV, rated current to 630A dual power supply system, when one power supply failure or undervoltage switch to another normal power supply, reliable guarantee the continuity of power supply. At the same time, it has the protection interlock function such as short circuit and overcurrent, which effectively avoids the unnecessary power supply shock when the load fails. When the common power supply fails, the switching device can complete the switching with the standby power supply to ensure reliability and safety.

ZW20-12 model outdoor AC vacuum circuit breaker is used to make and break load current, overload current and short-circuit current in 12kV, 50/60Hz power system. It's applicable for substations, industry and mining, urban and rural electricity power networks, especially applicable in occasions with frequent operation and automatic power distribution network. It accords with the standards of IEC62271-100 &GB1984 AC high voltage circuit breaker, GB/T 11022 HV General technical requirement of switches and control apparatus.

JN22-40.5 Indoor grounding switch (earthing) 35KV

JN22-40.5/31.5 series indoor high voltage grounding switch (hereinafter referred to as grounding switch) is a new product developed by the company. Its performance meets the requirements of the national standard GB1985-2004 and IEC62271-102:2002.

Suitable for three-phase rated voltage 40.5kV, AC 50Hz power system, can be used with KYN61-40.5 high voltage switchgear and other types of high voltage switchgear, as high voltage electrical equipment maintenance ground protection.

Environmental conditions

1. The altitude does not exceed 1000m;
2. Ambient air temperature: upper limit +40℃, lower limit -10℃;
3. Allow storage and transportation at 30℃;
4. The seismic intensity does not exceed 8 degrees;
5. No flammable, explosive, severe dust, chemical corrosion and severe vibration.

JN15-24 Indoor grounding switch (earthing) 24KV

JN15-24/31.5 series indoor high voltage ground switch is a new type of ground switch developed by our company. The product has advanced design, simple and compact structure, reliable technical performance and other characteristics, in line with GB1985-2004 and IEC62271-102; 2002 requirements.

Suitable for indoor 24kV three-phase AC 50(60)Hz power system; It has the short-circuit closing ability to protect other electrical equipment in the switchgear from damage, and can be used with a variety of high-voltage switchgear as a grounding protection during the maintenance of high-voltage electrical equipment.

Environmental conditions

1. The altitude does not exceed 1000m;
2. Ambient air temperature: upper limit +40℃, lower limit -10℃;
3. Allow storage and transportation at 30℃;
4. The seismic intensity does not exceed 8 degrees;
5. No flammable, explosive, severe dust, chemical corrosion and severe vibration.

JN15-12 Indoor grounding switch (earthing) 12KV

JN15A-12/31.5  Indoor High voltage AC electrical earth switch/ground switch for switchgear

JN15A-12/31.5 indoor AC high voltage grounding switches is an advanced level product with high-tech parameters performance.After comprehensive evaluation,it conforms to GB1985 and IEC62271 standard ,applies to power system of 3-12kV and three-phase AC 50Hz.It owns short-circuit making capacity to protect other electric equipment not being damaged.Can be used with various high voltage switchgear,also play a protective role in the high voltage

electrical equipment overhaul.

There shall have no conductive dust,no corrosive gasess,no severe vobaration and impact.no combustion and explosion on the site for switch operating.

JN15A-12/31.5 Indoor AC high voltage grounding switche use resin insulators, on which live parts, made of silver-plated electrolytic copper (99.9%), are placed. The blades are directly connected to the drive shaft. Contact elements are overdimensioned according to the requirements in order to guarantee, together with a high contact pressure between blades and contacts, a reduced ohmic resistance at the contact surface and a minimum metal wear-off during the life of the grounding switch, with the necessary robustness to withstand thermal and mechanical stresses under short-circuit conditions.

Environmental conditions

1. The altitude does not exceed 1000m;
2. Ambient air temperature: upper limit +40℃, lower limit -10℃;
3. Allow storage and transportation at 30℃;
4. The seismic intensity does not exceed 8 degrees;
5. No flammable, explosive, severe dust, chemical corrosion and severe vibration.

FLN36-40.5 Indoor load break switch (LBS) 40.5KV

FLN36-36 an indoor high-voltage SF6 load switch, with the rated voltage of 36kV.

Adopted with SF6 gas as an arc-extinguishing and insulation medium, including the three contactors for switching-on and switching-off and to-ground, and is characteristic in its small volume,its convenient installation and operation and its the great adaptability with surroundings.

FLN36-36 of an indoor high-voltage SF6 load switch and FLN36-36D of SF6 load switch plus

fuse combination can function to protect and control the electric equipments for power supply

and transformer substations especially being suitable for ring net cabinet, cable branch

cabinet and distribution switching substation. FLN36-24of an indoor high-voltage SF6 load

switch and FLN36-36D load switch plus fuse combination are complied with the standards

of IEC60265-1-1998, IEC60420 etc.

Environment condition

1. The altitude: under 1000M.
2. The ambient temperature: -25℃-+40℃.
3. The relative humidity of air: monthly≤90%, daily≤95%.
4. Amplitude: Earthquake degree 8.
5. Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.

FLN36-12 type indoor high voltage AC load breaker switch refer to international new technology and develop the switching equipment in according to the relevant standards in China's electric power system. Its performance indicators in full compliance IEC420, 694,129 and national standards GB3804-2004.

This is the main switching element RMU. The load breaker switch is a multifunctional medium voltage switchgear of gates, sub-gate, earthing. In a fully sealed with strengthen the structure of the epoxy resin housing to filled with SF6 gas,0.05MPa, with the minimum parts to achieve the above three functions, to ensure product quality, improve reliability, maintenance-free. It can be safely run for more than 20 years in normal conditions.

FZN63-12 Indoor load break switch (LBS) 12KV

FZN63-12 is a high voltage vacuum load switch, mainly used to control and protect high voltage equipment in power systems. ‌ Its main functions include switching operation and overload protection, through the vacuum interrupter to achieve quick power off and coincidence operation, improve the reliability and safety of power supply ‌.

The FZN63-12 high-pressure vacuum load switch has the following specific functions:

‌Switch operation:through the vacuum interrupter to realize the circuit opening and closing, suitable for frequent operation environment.

‌Overload protection:with overload protection function, can quickly cut off the circuit when the overload current is detected to prevent equipment damage.

‌‌High reliability: using vacuum arc extinguishing technology, has the characteristics of long life, low maintenance, suitable for all kinds of harsh environment ‌.

Environment condition

1. The altitude: under 1000M.
2. The ambient temperature: -25℃-+40℃.
3. The relative humidity of air: monthly≤90%, daily≤95%.
4. Amplitude: Earthquake degree 8.
5. Application occasions should free from fire, inflammables, explosives, corrosives and severe vibration.