Audited Supplier
Product Description
Underground Combined Power Transformer Substation
1, underground box with corrosion, waterproof, low temperature rise, low noise, easy installation, maintenance-free and other characteristics; It is a typical energy-saving product.
2, the tank is made of low alloy structural steel, its comprehensive mechanical properties, welding properties and low temperature toughness and other properties are very good, the box using hot spray zinc technology and supplemented by spray treatment, strong corrosion resistance.
3. Fully sealed structure is adopted. Exposed parts of high and low voltage terminals are isolated from the environment through imported sealed waterproof materials. When the local buried transformer is installed, it is placed in the pit. When the pit is flooded or even submerged, it can still operate safely, resist flood disasters, and effectively improve the reliability of the power supply system.
4. The unique heat sink structure is adopted to ensure the heat sink's heat dissipation capacity and rust prevention ability.
5, low pressure cabinet protection shell with patent outdoor light box type protection shell, light box type shell can be installed on both sides of the all-day advertising board, using small volume, green energy saving LED luminous components.
6. The underground transformer base is preassembled structure, which can be prefabricated with different materials flexibly according to customer requirements.
Technical parameters:
| No. | Item | Unit | Parameters |
| 1 | Rated voltage | kV | 12 |
| 2 | Rated frequency | Hz | 50 |
| 3 | Rated current of load switch | A | 630 |
| 4 | Main circuit thermal current | kA | 20 |
| 5 | Main circuit dynamic current | kA | 50 |
| 6 | Rated making current of main circuit | kA | 50 |
| 7 | Rated active load breaking current | 630 | |
| 8 | Rated ring closed breaking current | A | 630 |
| 9 | 5% of rated active load breaking current | A | 31.5 |
| 10 | Rated breaking current of cable charging | A | 10 |
| 11 | Rated no-load breaking current of transformer | A | 1600KVAq |
| 12 | Rated breaking current of fuse | kA | 31.5 |
| 13 | Rated transfer current | A | 1500 |
| 14 | Mechanical duration | times | 10000 |
| 15 | 1min power frequency withstand voltage to earth/between phases/disconnecting fracture | kV | 42/48 |
| 16 | Lightning impulse withstand voltage to earth/between phases/disconnecting fracture | kV | 75/85 |
| 17 | Rated pressure of SF6 (20ºCsurface pressure) | Mpa | 0.045 |
| 18 | Annual leakage rate of SF6 | ≤0.2% |
WORKING CONDITIONS
1. Altitude: no more than 1000M.
2. Ambient temperature: high temperature: +40ºC; Low temperature: -45ºC : high monthly average temperature: +30ºC : high annual average temperature: +20ºC;
3, installation environment: no explosive, corrosive liquid, gas and dust, installation site without violent shock, allowed in a certain period of time Or run completely submerged in water.
4. Ground acceleration induced by earthquake Ag; The horizontal direction is lower than 3m/s; The vertical direction is lower than 1.5m/s.
5, the waveform of the power supply voltage: approximately sine wave.
6, three-phase power supply symmetry: for three-phase underground transformer, three-phase power supply voltage should be roughly symmetrical.
PRODUCTION DETAILS
Company Profile
Kunji Electric Co., Ltd. which is specialized in producing, developing and marketing power transmission and distribution products. The company is established in 2015, which is located in Wenzhou city, Zhejiang province, China.
Our main products are including switchgear, ring main unit, transformer,substation, and Other Power Transmission & Trcansformer. Our product has passed ISO9001 and CE certificate.
We have a professional technical team which can provide you with full design solution and technical support.
Workshop
Certificate
Packaging & Shipping
RFQ
1. Are you a trading company or manufacturer ?
We are a professional factory with 10 years experience in the field of High and low Voltage switchgears, Substation,transformers,
cable distribution box and various electrical equipment.
Our factory is the excellent supplier of State Grid Corporation od China.
2. Do you accept customized serveice ?
We offer OEM/ODM service , can print your logo on product . our professional technical and quotation team can provice a satisfied satisfied project according to your drawing and parameters .
3. What is your MOQ?
Our MOQ is 1 piece.
4. How long is your delivery lead time ?
It depends on your product requirement and quantity . Generally , 5~10 working days is avaliable .
5. How do you solve quality problems?
Please porvide detailed photoes of quality problems. our technical and quality testing department will analyse.we will make a satisfied soluton within 2 days .
6. What is your payment terms ?
30%T/T in adcance,70% before shipment . West union,L/C are also acceptable .
