Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of oltc distribution transformer in China. If you're going to wholesale durable oltc distribution transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
OLTC Distribution Transformer is short for On-load tap-changing distribution transformer. It is an electrical equipment that can dynamically adjust the transformation ratio when the transformer is running under load. OLTC lets you adjust voltage ratios while the transformer stays under full load, no power cut required. For factories and mines running round-the-clock production, this eliminates costly shutdowns just to fix voltage deviations. The built-in intelligent controller also auto-monitors load and cuts energy loss continuously.OLTC Distribution Transformers have become the core equipment of modern power systems in key power scenarios.
If you've dealt with unstable grid voltage at mines, factories or rural power stations, you'll quickly see why OLTC distribution transformers stand apart from conventional no-load tap change units. Unlike regular transformers that force a full power shutdown to tweak voltage ratios, on-load tap changing transformers modify transformation ratios dynamically while carrying full operating load. This single design upgrade completely changes how power substations handle voltage fluctuations, bringing tangible improvements to grid stability, long-term operational costs and site adaptability all at once.
Product futures
What makes our OLTC Distribution Transformer so user-friendly is the built-in intelligent on-load capacity adjustment controller that runs fully automatic without constant manual supervision. It continuously collects real-time voltage and current data from the transformer's low-voltage side to calculate actual load levels accurately. Once the system detects voltage deviation beyond the preset safe range, it automatically sends tap adjustment signals and finishes capacity switching smoothly without disrupting power supply to downstream equipment. Site staff no longer need to arrange regular power cuts just to calibrate output voltage, which saves a huge amount of labor and avoids production downtime losses.
This integrated intelligent regulation technology also delivers clear energy-saving gains that add up over years of operation. Traditional transformers waste substantial energy through no-load and load loss when load conditions shift drastically. Our optimized OLTC control logic minimizes such power consumption during both light-load off-hours and heavy-load peak periods. For facility owners, this translates directly to lower monthly electricity bills and less heat generation inside the transformer tank, slowing down internal insulation aging.
From daily operation and maintenance perspectives, the OLTC design is built for simplicity and cost efficiency. The automatic tap switching mechanism has a highly sealed, wear-resistant structure that rarely needs routine inspection or part replacement. Sites equipped with our OLTC transformers report far fewer spare part purchases and less frequent maintenance work compared to older transformer models. The overall energy-saving and eco-friendly design also aligns with stricter environmental standards being rolled out across global power sectors.
Scope of Supply
OLTC Distribution Transformer
Rated Power: Up to 5000 kVA
Primary Voltage: Up to 35 kV
Standard accessories (bushings, optional conservator, thermometer, etc.)
Test reports and complete technical documentation
Testing & Quality Assurance
Each transformer undergoes strict testing procedures before delivery:
Routine tests (Factory Test)of transformer
1,Winding Resistance Measurement
2,Ratio Test (Voltage Ratio Measurement)
3,Transformer vector group test
4,Short-Circuit Impedance & Load Loss Test
5,No-Load Loss & No-Load Current Test
6,Insulation Resistance Test
7,Tests on-load tap-changer.
8,Oil pressure test on transformer to check against leakages past joints and gaskets
All products comply with IEC 60076 standard, and all other major international standard such as ANSI, GOST etc.
Certificates
FAQ
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