Live front pad mounted transformer
- Primary Voltage Ratings: 2400, 4160, 4800, 7200, 8320, 12470, 24940, 34500, 4160 GrdY/2400, 8320 GrdY/4800, 12470 GrdY/7200, 13860 GrdY/8000, 24940 GrdY/14400, 27600 GrdY/15935, 34500 GrdY/19920
- Secondary Voltage Ratings: 600Y/347, 480y/277, 208Y/120
- H.V. TAP RANGE: ±2×2.5% or others
- CONNECTION TYPE: Delta/Wye
- TYPE: Radial feed
- BIL: 30-150
- Standards: ANSI, IEEE, DOE, CSA, NEMA, UL
- Application: Renewable Energy, Energy Storage, Data Cente，Hotels, Single Family Houses, Underground Distribution Systems
- Power Rating: 300-10000 kVA
- Certificate: UL, cUL, CSA, SGS
Daelim Transformer is a professional manufacturer of transformers with UL listings and certifications for voltage levels up to 44kV, offering a comprehensive range of UL-certified pad-mounted transformers. Annually, we export Thousands of these transformers to the United States and Canada. Proficient in IEEE/ANSI, CSA, DOE, NEMA, and other standards, our team ensures compliance with diverse regulatory requirements. In addition to UL certification, we also hold CSA, MF, CESI certificates, and third-party SGS test reports. With extensive project experience, we understand that each project has unique requirements. That's why we offer customizable transformers, allowing adjustments to voltage, capacity, connection method, and special design to perfectly suit your needs. The live transformer can be customized to fit your project requirements. Contact Daelim Transformer today to receive the parameter sheet, drawings, and quotation for the Live Front transformer.
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- IEEE Std C57.12.34
- AN/IEEE C57.12.90
- IEEE C57.12.00
- DOE Std
- CAN/CSA 802.1
- CSA C227.5
- CSA C227.4
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Contact Daelim Transformer for special requirements
DAELIM Transformer Certificates
What is a live-front transformer?
A live front transformer is a pad-mounted transformer with accessible live components on the front panel. It allows direct access to the energized parts for maintenance and testing purposes. Caution must be exercised when working with a live front transformer due to the presence of exposed live elements.
Keep reading: 5MVA Pad Mounted Transformer
Live Front VS Dead Front transformer
Dead front and live front transformers both fall under the category of pad-mounted transformers. They share similarities but differ in some aspects.
Dead front transformers have separable insulated high voltage connectors, providing a casing well with detachable studs for connection to the power distribution system. High voltage bushings comply with IEEE 386 Std and are equipped with protective caps. They can have three or six high voltage bushings, depending on the configuration.
On the other hand, live front transformers feature one-piece high voltage connectors, usually porcelain bottle type or spiral style, with spade terminal blocks on top. They typically have three high voltage bushings.
In terms of safety, dead front transformers have fully insulated high voltage parts, ensuring a higher level of safety. In contrast, the high voltage parts of live front transformers are exposed, with current passing through the spiral porcelain bottle, making them comparatively less safe.
Overall, the key distinction lies in the design of the high voltage bushing section. Due to safety considerations, a majority of users (approximately 80%) prefer dead front transformers in the market.
Liv front transformer certifications
Daelim is a highly experienced manufacturer of pad-mounted transformers. Daelim'd pad-mounted transformers have received certifications such as UL, cUL, CSA, IEEE, and more. These certifications ensure compliance with American safety and quality standards
Contact UsDaelim live front transformer
| hinged door | lv ground bar |
| lightning arrester | ground steel pads |
| top cover | door handle |
| l.v terminal,h.v terminal | tap changer |
| vacuum pressure gauge | NEMA 4 outdoor control box |
| pressure relief device | ground terminal |
| drain valve, upper fill valve | temperature indicator |
| ground strap copper | oil level gauge |
| lifting lug | CEA ground bracket |
| Penta head bolt arrangement | h.v cable support bracket |
| nameplate | lv cable support bracket |
| pressure relief valve | radiators |
Live Front Transformer Dimensions
The table below presents the Live Front Transformer capacities and dimensions designed in accordance with CSA standards.
| Rate kVA capacity | Type of feed | BIL kV | Width mm |
| 75, 150 | Radial | 95 | 1030 |
| 75, 150, 225, 300 | Loop | 95 | 1280 |
| 75, 150, 225, 300, 500 | Loop/Radial | 125 | 1480 |
| 750, 1000, 1500, 2000, 2500, 3000 | Radial | 125 | 1730 |
| 750, 1000, 1500, 2000, 2500, 3000 | Loop | 125 | 1730, 1830 |
If the transformer capacity above can meet your requirements, please send your specific requirements to Daelim.
Send Inquriy NowStandard Primary
The table below displays the high voltage values according to CSA standards. Daelim's live front pad mounted transformer has a maximum voltage rating of 44kV. If your desired voltage value is not listed in the table, please feel free to contact Daelim for a tailor-made solution.
| Insulation class | High voltage | BIL |
| 5kV | 2400 4160 GrdY/2400 4160 | 60kV |
| 8.7kV | 4800 7200 8320 GrdY/4800 8320 | 75kV |
| 15kV | 12470 GrdY/7200 12470 13860 GrdY/8000 13860 | 95kV |
| 25kV | 24940 GrdY/14400 24940 | 125kV |
| 35kV/28kV | 27600 GrdY/15935 | 125kV |
Low Voltage Spade Terminals
The number of holes and spacing of the low-voltage terminals vary based on the capacity and voltage of the Live front pad mounted transformer. Please refer to the diagram on the right for more specific details.
The following live front transformer refers to Figure A
75-300 kVA, 600Y/347, 480y/277, 208Y/120
500-1000 kVA, 600Y/347, 480y/277
The following live front transformer refers to Figure B
1500-2000 kVA, 600Y/347
The following live front transformer refers to Figure C
500-1000 kVA, 208Y/120
1500-2000 kVA, 480Y/277
2500-3000 kVA, 600Y/347, 480Y/277
Get Quick PriceDesignation of voltage ratings
E shall indicate a winding that is permanently
Δ-connected for operation on an E volt system.
E1GrdY/E shall indicate a winding that has
reduced insulation and is permanently
Y-connected. The neutral end may be connected
in the tank or brought out and effectively
grounded for operation on an E1 volt system
with E volts available from line to neutral.
V × V1 shall indicate a winding, the sections of
which may be connected in multiple to obtain
one of the voltage ratings of V, or may be
connected in series to obtain one of the voltage
ratings of V1. Windings are permanently Δ- or
Y-connected.
E1Y/E shall indicate a winding that is
permanently Y-connected with a fully insulated
neutral brought out for operation on an E1 volt
system, with E volts available from line to
neutral.
Daelim Live Front Pad Mounted Transformer Cases
Live Front Transformer For USA
This is a customer from the United States who purchased six Live front pad-mounted transformers from Daelim. The specifications for each transformer are as follows:
- Power rating: 1000 kVA
- High voltage: 13.2 kV
- Low voltage: 0.48 kV
- Cooling method: ONAN
- Tap change: 7 position
Live Front Transformer For Canada
This is a customer from Ontario, Canada, who purchased 10 sets of three-phase live front transformers from Daelim. The specifications of the transformers are as follows:
- Power rating: 2500(3050) kVA
- High voltage (HV) rating: 44,000 Delta volts
- Low voltage (LV) rating: 600 Ground Y/347 volts
- Cooling method: KNAN
- Efficiency: 99.37%
Low voltage spade terminals
This is a customer from Houston, USA, who purchased six 3phase live front pad mounted transformers from Daelim. The specifications of the transformers are as follows:
- Power rating: 2550 kVA
- High voltage (HV) rating: 13.2 kV
- Low voltage (LV) rating: 4.16/2.4 kV
- Weight of insulation oil: 3858 LBS
- No-load current: 0.32%
Live Front Transformer Test Report
Unit transformer manufactured by Daelim undergoes rigorous testing before delivery. Daelim live front pad-mounted transformers are specifically tested by the CAN/CSA-C2.1 and IEEE C57.12.28 standards, along with other relevant industry standards.
Learn more about the Daelim Pad Mounted Transformer
These comprehensive tests ensure the quality, reliability, and safety of our transformers. By adhering to these standards, Daelim can confidently deliver transformers that meet or exceed your expectations.
If you have any further questions about Daelim's live front transformer testing processes or would like more information, please feel free to contact Daelim.
The following table is the test report template of Daelim's live front transformer. Before these transformers are shipped, the report will be sent to you for confirmation.
FAQ
Live front transformers have exposed terminals and components, while dead-front transformers have insulated and enclosed terminals, reducing the risk of accidental contact with live parts.
The main components include porcelain bushings, high-voltage connectors, surge arresters, and fuses, all of which are exposed when the cabinet is opened.
In urban settings, live front transformers offer space efficiency, ease of maintenance, and enhanced operational safety. Their accessibility simplifies inspection and maintenance tasks without compromising safety standards.
Operators must avoid direct contact with exposed terminals to prevent electrical shock. Proper training in handling procedures and adherence to safety protocols are essential to mitigate risks associated with live front transformers.
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