The Residential Pad Mounted Transformer
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Henan GNEE Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of the residential pad mounted transformer in China. If you're going to buy customized the residential pad mounted transformer made in China, welcome to get quotation from our factory. Quality products and reasonable price are available.
Residential platform transformers (abbreviated as "platform transformers") are distribution transformers installed on utility poles or platforms. Their core function is to convert 10kV high voltage electricity into 380V/220V low voltage electricity for daily use by residents.
Core parameter requirements
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Capacity Range:
According to GB/T 6451, standard residential transformer capacities are 30/50/80/100/200/315/400/500 kVA.
Energy Efficiency Level：
Must meet GB 20052-2020 Level 2 energy efficiency standards, with no-load losses reduced by 15%-20% compared to the previous national standard.
Insulation Level:
High-voltage side power frequency withstand voltage 35 kV/1 minute, lightning impulse withstand voltage 75 kV (peak)
Typical configuration scheme：
| Elements | Urban Plan | Rural Area Program |
| Installation height | ≥3m from the ground | ≥2.5m from the ground |
| Protection level | IP44 (splash-proof) |
IP23(Protected against vertical dripping) |
| Fuse selection | HRW12-10/100A | HRW11-10/63A |
| Parameter | Specification |
|---|---|
| Rated Capacity | 30–500 kVA45 |
| HV/LV Voltage | 10kV → 380V/220V5 |
| Insulation Leads | Cross-section ≥ 50 mm², phase spacing ≥ 500 mm4 |
| Grounding Resistance | Integrated grounding system ≤ 4 Ω4 |
Core component technical specifications
Core system
Materials and Processing:
▸ Made of DQ151-35 cold-rolled grain-oriented silicon steel sheets (GB/T 2521)
▸ Lamination coefficient ≥ 0.96, no-load loss ≤ 65W (compliant with GB/T 6451)
Structural Features:
Core Leg Cross-Section: Stepped, 7-level stacking. Joint Type: 45° beveled joint (reduces hysteresis losses).
Winding system
| Parameter | High voltage winding (10kV) | Low voltage winding (0.4kV) |
| Conductor type | ZB-0.45 paper covered rectangular copper wire | TMR2-12×2.5 copper busbar |
| Insulation grade | Grade A (105°C) | Grade F (155°C) |
| Turn-to-turn withstand voltage | 3kV/1min without breakdown | 2.5kV/1min without breakdown |
Insulating oil index
Physical properties: Kinematic viscosity (40℃): ≤9.6mm²/s Flash point (closed cup): ≥135℃ Dielectric loss factor (90℃): ≤0.005
Chemical properties: ▸ Acid value ≤0.03mgKOH/g ▸ Water content ≤15ppm (GB/T 7600)
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