bokr elec

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.

KYN61-40.5 air-insulated metal-clad drawout type switchgear is a kind of MV switchgear.

Service environment

a) Air temperature: -25℃~+40℃

b) Humidity: Monthly average humidity 95%; Daily average humidity 90%.

c) Altitude: ≤ 2500m

BKXGN-12 Solid Insulated Switchgear is suitable for middle voltage power distribution system with a rated voltage of less than 10kV and a rated current under 1250A.

XGN66-12 Medium voltage AC switchgear fixed type metal-enclosed switchgear applied to the 3.6kV~35kV three phase AC 50/60Hz system to receive and distribution power energy

XGN15 series SF6 rmu ring main unit applies SF6 load switch as main switch, for whole cabinet is suitable for electric distribution automation and compact also expandable metal close switchgear.

Outdoor SF6 Insulated RMU DFW series high voltage cable branch box is widely used in 11KV, 24KV, 33KV node connection of cable system. It is main electrical equipment for the cable to be assembled and separeted from the outlet of the switchgear.

Outdoor type Cable Branch Box 10KV/20KV

It is a kind of cable chemical equipment widely used in power distribution network system in recent years. The main features are two-way door opening and using butt sleeve as connection bus, small length, clear cable arrangement, three - core cables do not need a long span cross.

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.

PV 20kv 35kv European compact substation for Medium voltage compartment, Low voltage compartment and transformer compartment. BOKR ELEC can custom the substation as customers requirement under their drawing/single line diagram (SLD). We design and produce this substation under the international standard of IEC1330 and MV standard IEC62271-200.

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

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.

The oil-immersed transformer is a type of power transformer that uses insulating oil as both a coolant and an
insulating medium. The oil helps dissipate heat generated during operation and provides electrical insulation
between the windings and the transformer core. This design is widely used in power distribution and
transmission systems due to its reliability and efficiency.
The transformer with a voltage rating of 35/0.4 kV is typically used in distribution networks. The high-voltage
side (35 kV) is connected to the power grid, while the low-voltage side (0.4 kV) supplies electricity to endusers,
such as residential, commercial, or industrial facilities. This voltage configuration is ideal for stepping
down medium voltage to low voltage for local consumption.
Oil-immersed transformers are known for their robust construction and ability to handle high loads. They
are designed with a core made of laminated silicon steel to minimize losses and windings made of copper
or aluminum for efficient energy transfer. The insulating oil also enhances the transformer's lifespan by
protecting the internal components from moisture and oxidation.

The dry-type transformer is an electrical transformer that uses air as the cooling medium instead of liquid
(such as oil). It is widely used in indoor applications due to its safety, environmental friendliness, and low
maintenance requirements. The 35/0.4 kV dry-type transformer is designed to step down high voltage (35
kV) to low voltage (0.4 kV), making it suitable for industrial, commercial, and residential power distribution
systems.
The transformer operates without flammable liquids, eliminating the risk of fire and environmental
contamination. This makes it ideal for installations in buildings, hospitals, schools, and other public spaces
where safety is a priority. Its robust construction ensures reliable performance even in harsh environments,
with high resistance to humidity, dust, and temperature fluctuations.

S11/S13—M.RL series 10kV grade solid core transformer is a newly developed product, which breaks
through the traditional planar structure and adopts three-phase symmetrical solid structure.
And because there is no air gap in the magnetic circuit, the winding is more compact, the magnetic
conduction direction of the silicon steel strip is completely consistent, the three core columns are arranged in
an equilateral triangle solid, the three magnetic circuits are the same length, and all are the shortest, and the
processing and nesting are free of materials;
Therefore, it is an efficient and energy-saving transformer that uses traditional materials, but has lower
operating noise and more compact structure.

S13 oil-immersed power transformer is a transformer that combines transformers and corresponding
auxiliary equipment, is installed under an outdoor reference surface that has no direct contact with the public,
and can be immersed in water for a certain period of time. The underground transformer has the function
of power distribution and can replace traditional substations and is widely used in industrial parks and
residential areas.
High Power Capacity: This 110kv three-phase power transformer boasts a rated capacity of 2, 6, 8, and
10 MVA, making it an ideal choice for high-power applications, as requested by clients seeking a reliable and
efficient solution.
Versatile Voltage Options: With a range of primary and secondary voltage options, including 110kv, 115kv,
138kv, and 69kv, this transformer can be easily integrated into various power systems, catering to diverse
customer needs and preferences.

07/ Bokong Electric Co.,Ltd.
Try it onec,trust it always!
www.bokrelec.com
SM11 10/0.4KV Oil immersed
Power transformer
Description
Iron core:
the iron core is made by crystal grain-oriented silicon-steel sheet;GEORG cross cut shear(made in West
Germany)is adopted to cut the silicon-steel sheet with a 45°joint seam;fold the sheet into a multistage roll
cross-section to reduce the noise and power consumption.
Coil:
cylinder type for high voltage; cylinder type or foil type for low voltage; this can increase the ability to resist
short circuit and strike; and the distribution of magnetic path is more rational.
Oil tank:
the oil tank is made by fine cold-rolled steel sheets; GEORG corrugation oil tank production-line is adopted;
to meet environmental needs, then, antiseptic coating material is applied on the surface, which can meet the
requirements for petroleum and chemical industry(much oil stain and many chemical substances).In addition,
the corrugations not any possess heat radiation function, but also meet the requirement for oil expansion and
oil contraction trader normal performance, The isolation from air guarantees a low aging speed of oil and a
long life expectancy of transformer.

The product is a new product further developed on the basis of fully absorbing the advanced technology
of many similar products at home and abroad. The product has strong thermal shock resistance, flame
resistance, high fire performance, low loss, small local discharge, low noise, no harmful gases, no pollution
to the environment, insensitive to temperature and dust, small size, no cracking and simple maintenance.
Therefore, it is most suitable for important places with high fire protection requirements, explosion-proof
and moisture-proof. Such as: airports, subways, power plants, metallurgical industry, hospitals, high-rise
buildings, shopping centers, densely populated areas and petrochemical, nuclear power plants, nuclear
submarines and other special environments.
SCB13 dry type transformer product features:
Low loss: the no-load loss of the product is more than 20% lower than that of scb11 products, excellent
energy saving effect, economic operation, maintenance-free.
Low noise: The product noise level is more than 10-15 dB lower than the current professional standard jb/
t10088-1999 "6-220kv transformer sound level".
Low discharge: The resin mixture material adopts foreign advanced mixing method and vacuum film
degassing two technologies to stir the mixture evenly and eliminate the bubbles in the mixture. The product
has only a very low local discharge, which can be controlled below 5pc. The high and low voltage coils are
poured under vacuum and pressure, so that the resin insulation has both full encapsulation and interturn
leaching property. The casting body has a dense solidified structure, which is resistant, explosion-proof and
does not pollute the environment.

With the advanced technology brought in from averseas,we developed SC10,SCB10 series padding
thin-insulation dry-type distributing transformer whose winding is sealed up with epoxy,therefore the resin
insulating dry-type transformer is flame-retardant,explosion-proof,free from maintenance and pollution,and it
is compacted and can go deep into load center.
Besides,with scientific and reasonable design and coating craftwork,The product has a small partial
discharge, low noise and strong heat dissipation capability. It can be operated for a long time under 140%
rated load under forced air cooling conditions, and is equipped with an intelligent temperature controller with
fault alarm, over temperature alarm and over temperature trip. And the black box function, and connected to
the computer through the RS485 serial interface, can be centralized monitoring and control.
Our company's dry-type transformers are widely used in transmission and transformation point systems,
such as hotels, restaurants, airports, high-rise buildings, commercial centers, residential quarters and other
important places, as well as subways, smelting power plants, ships, marine drilling platforms and other
environmentally harsh places.

(hereinafter referred to as GGD) is suitable for the distribution system with AC 50HZ, rated working voltage 380V, rated working current to 3150A.It can be used as power, illumination of power users in the power station, substation and fatory-mine company, and it also can used to transform, distribute and control the distribution system.

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,.

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.

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.

FZN21-12 type of indoor AC high voltage load switch- fuse combination units appliances for three-phase AC 10kV, 50Hz power system, or with the complete power distribution equipment and loop-network switch cabinet , combined substation and other ancillary uses, is widely used in urban network construction and transformation engineering, industrial and mining enterprises, high-rise buildings and public facilities ,can be used as ring power supply unit or terminal equipment, play power distribution, control and protection. Technical performance of the products meet the IEC publication 60265-1/FDIS

FN7- 12R(L) model indoor AC HV load break switch-fuse combination apparatus is developed and designed based on international technology and national power supply requirement, it passed all type tests and trial-operation inspections. The apparatus conforms to IEC420: AC LOAD BREAK SWITCH AND  FUSE COMBINATION APPARATUS(1990 EDITION) Compared to international product it keeps up with technical level with small volume and light weight. It is applicable in ring main unit and prefabricated substations as well as 12kv line and power distribution system. The product realizes three working positions: power making. power breaking and earth. It applies to power system of rated voltage 6- 12kv, 50/60HZ breaking load current over load current and short-circuit current.

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.

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.

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.

FLN36-24D indoor high voltage SF. Load switch for rated voltage 12KV indoor switchgear, using SF gas as arc extinguishing and insulating medium, including closing, opening and grounding three stations, with small volume, easy installation and use and strong adaptability to the environment.

Model FLN36-24D indoor high voltage SF. Load switch and FLRN36-12D type indoor high voltage SF. The combination of load switch and fuse has the function of control and protection, which can be used for the protection and control of electrical equipment in power supply and substation. Especially suitable for ring network cabinet, cable branch box and distribution opening and closing.

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 ‌.

FZN16 is a kind of indoor high voltage vacuum load switch, suitable for three-phase AC 50Hz power grid with rated voltage 6-12KV, mainly used to break load current, overload current and short circuit current. ‌ This kind of switch is especially suitable for oil-free, no maintenance and frequent operation requirements ‌.

The FZN16 load switch can be used with CS6-I operating mechanism and CS□ manual operating mechanism to meet different operation requirements. It is designed with frequent operation in mind and therefore performs well in situations where high frequency operations are required ‌. In addition, the FZN16 load switch also has the characteristics of no maintenance, reducing the need for maintenance work, improve the reliability of the equipment ‌.

FZN25-12D/T630-20 Type Indoor AC high voltage load switch is three-phase AC 50Hz, rated voltage of 12kV and indoor installations, for industrial and mining enterprises for distribution in clinics and substations and other occasions, as electrical protection and control facilities for the division and load current, loop current, no load transformer and cable charging current.

       As the combination of electrical transformers and other electrical equipment on the protective effect than the circuit more reliable, more economical, especially for rings, double radiation power supply units and box-type substation.

FZN21-12 type of indoor AC high voltage load switch- fuse combination units appliances for three-phase AC 10kV, 50Hz power system, or with the complete power distribution equipment and loop-network switch cabinet , combined substation and other ancillary uses, is widely used in urban network construction and transformation engineering, industrial and mining enterprises, high-rise buildings and public facilities ,can be used as ring power supply unit or terminal equipment, play power distribution, control and protection. Technical performance of the products meet the IEC publication 60265-1/FDIS