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China ZGS 10kV Oil Immersed Pad Mounted Transformer - Reliable Suppliers & Factory Solutions
Uses
It is mainly used for 10/0.4KV, 50Hz/60Hz power distribution systems, the rated capacity of transformers is 50-1600kVA, widely applicable to outdoor power supply locations such as cities, residential areas, factories and mines, hotels, hospitals, parks, oil fields, airports, docks, railways, and temporary facilities.
The pad mounted transformer can be used in both ring network power distribution systems and as terminal power supply for radial power grids.
Service conditions
a.
Altitude : ≤ 1000m
b.
Environmental temperature range: not higher than +40 ℃; Not lower than -40 ℃
c.
Relative humidity: daily average not exceeding 95%;
monthly average not exceeding 90%;
d.
Outdoor wind speed: ≤ 35m/s
e.
Installation location: Installed in a place without fire, explosion hazards, severe pollution, chemical corrosion, and severe vibration.
※ Note: If the above normal usage environment conditions are exceeded, users can negotiate with our factory to resolve the issue.
Structure
- The product is divided into three main parts: transformer chamber, high voltage chamber, and low voltage chamber.
- The performance of the transformer complies with S13 or S11-M type transformers.
- The high-voltage side is protected by a V-shaped or T-shaped load switch and a two pole fuse. The current limiting fuse is used for line protection and has a large breaking capacity. The plug-in fuse is used to protect the secondary side overload and short circuit of the transformer.
- The load switch and fuse are installed in the transformer chamber, using the insulation liquid of the transformer as the insulation medium and heat dissipation medium.
- The incoming line on the high-voltage side adopts high-voltage cable plugs, and the high-voltage room is fully insulated.
- The low-voltage side of conventional products adopts direct output. According to user requirements, low-voltage metering and branch out lines can be added.
- The box body adopts steel plate welding, corrugated sheet heat dissipation on three sides, fully sealed structure, treated with special technology, strong anti-corrosion ability, and beautiful appearance.
- The high voltage chamber and low voltage chamber are isolated. The operable components in the high voltage chamber include load switches, transformer tap changers, high voltage incoming plugs, and plug-in fuses.
- The box is equipped with: oil level thermometer, oil level gauge, pressure relief valve, oil drain valve, and oil sample valve. Low voltage output terminals and low-voltage metering systems equipped according to user requirements.
Technical parameters and external dimensions
Table 1: Parameters of Load switch
| SN | Description | Unit | Parameter |
|---|---|---|---|
| 1 | Rated voltage | kV | 12 |
| 2 | Rated current | A | 630 |
| 3 | Rated frequency | Hz | 50/60 |
| 4 | Rated breaking current | A | 630 |
| 5 | Thermal stability current | kA | 16/2 |
| 6 | Dynamic stable current | kA | 40 |
| 7 | Full load breaking times | Times | 20 |
| 8 | Mechanical life | Times | 2000 |
| 9 | 1-minute power frequency withstand voltage (phase to phase and to ground) | kV | 42 |
| 10 | Lightning impulse level (phase to phase and to ground) | kV | 75 |
Table 2: Parameters of High Voltage Cable Plug
| SN | Description | Unit | Parameter |
|---|---|---|---|
| 1 | Rated voltage | kV | 12 |
| 2 | Rated current | A | 200/300/630 |
| 3 | 1-minute power frequency withstand voltage | kV | 42 |
| 4 | Insulation resistance | MΩ | 2000 |
| 5 | Contact resistance of contacts | μΩ | ≤100 |
Table 3: Parameters of Fuse
| Rated capacity (kVA) |
Rated voltage 6kV | Rated voltage 10kV | ||
|---|---|---|---|---|
| Current limiting fuse (A) | Model of Plug in fuse | Current limiting fuse (A) | Model of Plug in fuse | |
| 50 | 40 | 12 | 40 | 6 |
| 100 | 50 | 15 | 40 | 12 |
| 160 | 80 | 25 | 50 | 15 |
| 200 | 80 | 25 | 80 | 25 |
| 250 | 125 | 25 | 80 | 25 |
| 315 | 150 | 50 | 80 | 25 |
| 400 | 150 | 50 | 100 | 40 |
| 500 | 175 | 65 | 125 | 50 |
| 630 | 175 | 100 | 150 | 50 |
| 800 | 200 | 100 | 150 | 65 |
| 1000 | 200 | 140 | 200 | 100 |
| 1250 | 200 | 200 | 200 | 100 |
※ Note: The backup current limiting fuse and plug-in fuse are oil immersed type.
Table 4: Parameters of Transformers
| Rated capacity (kVA) |
No-load loss (W) | Load loss (W) | Impedance Voltage % | ||
|---|---|---|---|---|---|
| S13 | S11 | S13 | S11 | ||
| 50 | 100 | 130 | 910 / 870 | 910 / 870 | 4 |
| 100 | 150 | 200 | 1580 / 1500 | 1580 / 1500 | |
| 160 | 200 | 280 | 2310 / 2200 | 2310 / 2200 | |
| 200 | 240 | 340 | 2730 / 2600 | 2730 / 2600 | |
| 250 | 290 | 400 | 3200 / 3050 | 3200 / 3050 | |
| 315 | 340 | 480 | 3830 / 3650 | 3830 / 3650 | |
| 400 | 410 | 570 | 4520 / 4300 | 4520 / 4300 | |
| 500 | 480 | 680 | 5410 / 5150 | 5410 / 5150 | |
| 630 | 570 | 810 | 6200 | 6200 | 4.5 |
| 800 | 700 | 980 | 7500 | 7500 | |
| 1000 | 830 | 1150 | 10300 | 10300 | |
| 1250 | 970 | 1360 | 12000 | 12000 | |
※ Note: The load loss value to the left of the slash applies to the Dyn11 or Yzn11 connection group, while the load loss values to the right of the slash applies to the Yyn0 connection group.
Voltage combination
Rated voltage of high voltage side : 11, 10.5, 10, 6.3, 6kV
Rated voltage of low voltage side : 0.4kV
Transformer connection group and high-voltage tap range
The connection group of the transformer is Y, yn0 or Dyn11.
Tap range: ±5%, ± 2x2.5%, or confirmed by the user.
※ Note: If the specified technical parameters are exceeded, please negotiate with our company.
Frequently Asked Questions (FAQ)
What are the primary applications of this pad-mounted transformer?
It is primarily designed for 10/0.4KV, 50Hz/60Hz power distribution systems with transformer capacities between 50-1600kVA. It is ideal for outdoor locations such as residential areas, cities, factories, hotels, hospitals, parks, airports, and temporary facilities.
What environmental conditions are required for standard operation?
The standard installation conditions include an altitude of ≤ 1000m, outdoor wind speeds of ≤ 35m/s, and ambient temperatures between -40 ℃ and +40 ℃. Relative humidity should not exceed a daily average of 95% or a monthly average of 90%. The site must also be free from fire, explosion hazards, chemical corrosion, and severe vibration.
How is the high-voltage side of the transformer protected?
The high-voltage side is protected using a V-shaped or T-shaped load switch combined with a two-pole fuse. A current limiting fuse handles line protection with high breaking capacity, while a plug-in fuse protects the secondary side from overload and short-circuit conditions.
What structural design features prevent corrosion and manage heat?
The box body is built using steel plate welding and features corrugated sheet heat dissipation on three sides. It is completely sealed and treated with specialized technology for a highly anti-corrosive finish and an attractive appearance.
What are the available voltage combinations and tap ranges?
The high-voltage side supports rated voltages of 11, 10.5, 10, 6.3, or 6kV, while the low-voltage side is rated at 0.4kV. The transformer connection groups are Y, yn0 or Dyn11, with a tap range of ±5%, ±2x2.5%, or custom specifications confirmed by the user.