The Chinese box transformer uses one fuse for each phase instead of the two fuses of the American box transformer for protection. Its electrical feature is that when the fuse of any phase is blown, it will ensure that the load switch trips and cuts off the power supply, and the main switch can only be closed after the fuse is replaced.
A 35kV load switch is installed in the high-voltage room, and the load switch has its own isolation and fuse protection.
At the same time, the load switch has its own signal transmission node, which facilitates background monitoring of the operation of the load switch. The low-voltage part is composed of an intelligent frame circuit breaker and a comprehensive measurement and control device. The measurement and control device can monitor the status of the switch and the operation of the transformer protection device in real time, and transmit it to the main control room through GPS to achieve remote monitoring.
Location:
Prefabricated Substation Series
- Photovoltaic Grid-Connected Series
- Low-Voltage Switchgear Series
- High-Voltage Switchgear Series
- Ring Main Unit, Gas-Fired Switchgear, Solid-State Switchgear Series
- Prefabricated Substation Series
- Outdoor Vacuum Circuit Breaker Series
- Indoor Vacuum Circuit Breaker Series
- Power Transformer Series
- Distribution Box Series
- Cable Branch Box
Prefabricated Substation Series
Product Center
- Photovoltaic Grid-Connected Series
- Low-Voltage Switchgear Series
- High-Voltage Switchgear Series
- Ring Main Unit, Gas-Fired Switchgear, Solid-State Switchgear Series
- Prefabricated Substation Series
- Outdoor Vacuum Circuit Breaker Series
- Indoor Vacuum Circuit Breaker Series
- Power Transformer Series
- Distribution Box Series
- Cable Branch Box
Fahrenheit box transformer
The Chinese-style box transformer consists of three parts: a high-voltage chamber, a low-voltage chamber, and a transformer. It is mainly used in photovoltaic and other new energy power generation projects. The difference between its structural characteristics and traditional box-type transformers is that the transformer part is placed outside the box transformer casing, which effectively solves the heat dissipation problem of the transformer. The heat generated by the transformer body is quickly taken away by the natural climate. The transformer is closely connected to the box transformer casing through side outlet wires. The box transformer is divided into a high-voltage chamber and a low-voltage chamber through the middle partition of the box transformer casing. It is an ideal equipment for new energy power generation.
- Product Details
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Features
Product advantages
1. Compact structure
Small size, easy to install and flexible;
2. Protect personal safety
Fully insulated, fully sealed structure, safe, reliable, and maintenance-free;
3. Reduce operating costs
The high-voltage side adopts a full-range fuse, which has high segmentation capacity and reduces operating costs;
4.Easy to operate
The high-voltage incoming line adopts a cable connector structure, which is fully insulated, safe, reliable and easy to operate;
5. Convenient conversion
It can be used for both ring network and terminal. The conversion is very convenient and improves the reliability of power supply;
6. Low noise and low loss
The transformer is a three-phase three-column or three-phase five-column structure. The core adopts stepped joint technology or rolled core technology. It has low noise, low loss, and strong resistance to short circuit and overload;
7. \"Three defenses\" function
The cabinet can adopt anti-corrosion design and special spray painting treatment according to the requirements of the operating environment. It has the \"three-proof\" function, that is, anti-condensation, anti-salt spray, and anti-mold functions, and can meet the anti-corrosion requirements in high-temperature and high-humidity environments.
Main technical parameters
| Main technical parameters of combined box transformer (Huabian) | |||||||||||||
| project | unit | High voltage switch | transformer | Low voltage electrical appliances | |||||||||
| Rated voltage | kV | 12 | 40.5 | 10.5/0.8 | 35/0.8 | 0.8 | |||||||
| Rated capacity | kVA | 1000-3300 | |||||||||||
| Rated frequency | Hz | 50 | 50 | 50 | |||||||||
| Rated current | A | 200 | 63 | ||||||||||
| 1min power frequency withstand voltage | phase and ground | kV | 42 | 95 | 35 | 85 | 5 | ||||||
| Isolate fracture | kV | 48 | 110 | ||||||||||
| Lightning impulse withstand voltage | phase and ground | kV | 75 | 185 | 75 | 220 | 12 | ||||||
| Isolate fracture | kV | 85 | 215 | ||||||||||
| Rated short circuit breaking current (effective value) | kA | 31.5 | 50 | ||||||||||
| Rated short-time withstand current (effective value) | kA | 20(4S) | 20(4S) | 40(1S) | |||||||||
| Rated short circuit making current (peak value) | kA | 50 | 50 | ||||||||||
| Rated peak withstand current | kA | 50 | 50 | ||||||||||
| Protection level | IP33 | ||||||||||||
| noise level | ≤55dB | ||||||||||||
Component selection table
| capacity | High voltage switch | High voltage fuse | High voltage arrester | Low voltage switch | Auxiliary variable Pressure |
||||||||
| 12 | 40.5 | 12 | 40.5 | 12 | 40.5 | ||||||||
| 1000 |
FZRN25-12 VTK-12 |
FT16- 40.5 |
XRNT-12/100 | XRNT-40.5/30 |
HY 5WZ 17/45 |
HY- 5WZ- 51/134 |
RDW1 breaker KFW2 breaker |
SG- 5/0.8- 0.4 Capacity can as needed to be sure |
|||||
| 1600 | XRNT-12/160 | XRNT-40.5/50 | |||||||||||
| 2000 | XRNT-12/200 | XRNT-40.5/60 | |||||||||||
| 2500 | XRNT-40.5/80 | ||||||||||||
| 3150 | XRNT-40.5/100A | ||||||||||||
| 3300 | XRNT-40.5/100A | ||||||||||||
