Box Style Pad Mounted Transformer
Zhejiang Tianrun Electric Co., Ltd. is one of the leading manufacturers and suppliers of box style pad mounted transformer in China. We are committed to providing high quality customized products with competitive price. We warmly welcome you to buy bulk advanced box style pad mounted transformer from our factory. Also, quotation is available.
Product Overview
Our company's Pad-Mounted Combined Transformer is a domestically produced American-style box-type substation, which serves as a crucial power supply unit in the cable distribution network. This integrated pre-installed product combines high-voltage control, protection, substation, and distribution equipment into one complete system, making it widely applicable to urban and rural distribution networks. It is designed to provide safe, reliable, and efficient power distribution solutions for various scenarios.

|
Rated Capacity (kVA) |
Rated High Voltage (kV) |
Voltage Low Voltage (kV) |
Tapping Range (%) |
Vector Group Symbol |
No-load Current |
Loss (W) |
Resistance Voltage (%) |
Noise (dB) |
Temperature Rise |
|||||
|
(%) |
No-load |
Load |
||||||||||||
|
S9 |
S10/S11 |
S9 |
S10 |
S11 |
S9 S10/S11 |
|||||||||
|
30 |
6 |
0.4 |
±5 |
Yyn0 |
2.2 |
2.0 |
130 |
600 |
4 |
5.5 |
Top oil
|
|||
|
50 |
2.0 |
1.8 |
170 |
870 |
||||||||||
|
63 |
1.9 |
1.5 |
200 |
1040 |
||||||||||
|
80 |
1.7 |
1.2 |
250 |
1250 |
||||||||||
|
100 |
1.6 |
1.1 |
290 |
1500 |
||||||||||
|
125 |
1.5 |
1.0 |
340 |
270 |
1800 |
|||||||||
|
160 |
1.4 |
1.0 |
400 |
310 |
2200 |
|||||||||
|
200 |
1.4 |
0.8 |
480 |
375 |
2600 |
|||||||||
|
250 |
1.2 |
0.8 |
560 |
455 |
400 |
3050 |
3000 |
|||||||
|
315 |
1.1 |
0.7 |
670 |
540 |
475 |
3650 |
3600 |
|||||||
|
400 |
1.0 |
0.7 |
800 |
650 |
570 |
4300 |
4200 |
|||||||
|
500 |
1.0 |
0.6 |
960 |
775 |
680 |
5100 |
5000 |
|||||||
|
630 |
0.9 |
0.6 |
1200 |
920 |
800 |
6200 |
6000 |
4.5 |
||||||
|
800 |
0.8 |
0.6 |
1400 |
1120 |
980 |
7500 |
7400 |
|||||||
|
1000 |
0.7 |
0.5 |
1700 |
1320 |
1150 |
10300 |
9860 |
|||||||
|
1250 |
0.6 |
0.5 |
1950 |
1560 |
1360 |
12800 |
12000 |
|||||||
|
1600 |
0.6 |
0.5 |
2400 |
1880 |
1640 |
14500 |
14000 |
|||||||
Product Structural Features
Compact & Space-Saving
With a compact structure and small volume, it only occupies about 1/3 to 1/5 of the space of domestic European-style box-type transformers of the same capacity, greatly reducing the floor area required for installation.
Fully Sealed & Insulated
Adopts a fully sealed and fully insulated structure, eliminating the need for insulation distance and reliably ensuring personal safety during operation and maintenance.
Flexible High-Voltage Connections
High-voltage connections are compatible with both ring network and terminal applications, featuring flexible power supply and high operational reliability.
Excellent Transformer Performance
Boasts low loss, low noise, and low temperature rise; meanwhile, it has strong overload capacity, short-circuit resistance, and impact resistance, ensuring stable long-term operation.
Customizable Low-Voltage Feeders
Meets various low-voltage feeder requirements, which can be selected according to standard plans or customized according to user-specific designs.
Versatile Cable Heads
Two types of cable heads are available: 200A elbow plug and 600A "T" type fixed cable connector, both of which can be equipped with fully insulated zinc oxide surge arresters. The 200A cable head supports live hot-plugging and can also function as an isolating switch.
Structural Design Features
- Integrated Design: The high-voltage load switch and high-voltage fuse are integrated in transformer oil. It offers both integrated and split structure forms with the transformer body, allowing flexible selection based on actual project needs and on-site conditions.
- Tank Design: The tank adopts a fully sealed structure, which effectively protects internal components from external environmental impacts. It is also equipped with essential monitoring and protection components, including an oil thermometer, oil level gauge, pressure gauge, pressure relief valve, and oil drain valve. These components enable comprehensive real-time monitoring of the transformer's operating status, ensuring stable and safe equipment operation.
Innovative & Distinctive Design
- Plug-in Dry-Type Fuse: Specifically developed to better adapt to the actual needs of the Chinese power grid. When the fuse melts, it does not affect the performance of the transformer oil, ensuring the normal operation of the equipment and facilitating quick and convenient maintenance.
- Diverse Housing Forms: For the ZGS□-12 product model, based on the complexity of low-voltage feeder requirements, it is divided into three housing forms: standard type, enhanced type, and comprehensive type. This design provides greater flexibility for users and design units in product selection, helping to achieve better cost-effectiveness while meeting specific project requirements.
Diversity of Power Supply Modes
The product supports three power supply modes: ring network, terminal, and dual power source. This multi-mode design can fully meet the power supply demands of various application scenarios, significantly enhancing the product's applicability and flexibility in different distribution network configurations.

|
Dimensions |
||||||||
|
Standard Type |
Capacity kVA |
A |
B |
C |
D |
E |
F |
H |
|
100-250 |
1900 |
1650 |
1250 |
650/800 |
600 |
1410/1560 |
1450 |
|
|
315 |
1900 |
1650 |
1350 |
650/800 |
650 |
1460/1610 |
1450 |
|
|
400-500 |
1900 |
1750 |
1450 |
650/800 |
650 |
1490/1640 |
1550 |
|
|
630 |
1900 |
1750 |
1550 |
650/800 |
700 |
1580/1730 |
1550 |
|
|
800 |
1900 |
1850 |
1550 |
650/800 |
700 |
1640/1790 |
1650 |
|
|
1000 |
1900 |
1850 |
1650 |
650/800 |
700 |
1640/1790 |
1650 |
|

|
Enhanced Type Dimensions |
||||||||
|
Enhanced Type |
Capacity kVA |
A |
B |
C |
D |
E |
F |
H |
|
100-250 |
2400 |
1650 |
1250 |
800 |
600 |
1560 |
1450 |
|
|
315 |
2400 |
1650 |
1350 |
800 |
650 |
1610 |
1450 |
|
|
400-500 |
2400 |
1750 |
1450 |
800 |
650 |
1640 |
1550 |
|
|
630 |
2400 |
1750 |
1550 |
800 |
700 |
1730 |
1550 |
|
|
800 |
2400 |
1850 |
1550 |
800 |
700 |
1790 |
1650 |
|
|
1000 |
2400 |
1850 |
1650 |
800 |
700 |
1790 |
1650 |
|
Operating Environment Conditions
- Ambient Temperature: Maximum +40℃, minimum -30℃
- Altitude: ≤ 1000m
- Wind Speed: Equivalent to 34m/s (not exceeding 700Pa)
- Humidity: Daily average relative humidity ≤ 95%; monthly average relative humidity ≤ 95%
- Seismic Protection: Horizontal acceleration ≤ 0.4m/s², vertical acceleration ≤ 0.15m/s²
- Installation Site Inclination: Not greater than 3°
- Installation Environment: The surrounding air shall be free from significant pollution by corrosive or flammable gases, and the installation site shall be free from severe vibration.
If the product is to be used under conditions exceeding the above specifications, specific requirements can be negotiated with our company for customized solutions.
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