Three-phase 3150kVA Cast Resin Dry-type Power Transformer

Product Introduction

The three-phase 3150kVA resin-cast dry-type power transformer is a power transformer that uses epoxy resin casting technology and has many advantages and applicable scenarios.

Dry-type power transformer product features

Safety and fire resistance: The transformer uses epoxy resin casting technology and has flame retardant and fireproof properties, which is suitable for places that require high safety standards.

Low maintenance cost: Due to the reduced maintenance requirements in the design, the transformer is maintenance-free, easy to install, and suitable for long-term operation.

Environmental performance: No transformer oil is used, which avoids oil leakage and is environmentally friendly.

Efficient operation: It can operate at 120% rated load under forced air cooling conditions and has the characteristics of low loss and low noise.

High reliability: High mechanical strength, strong short-circuit resistance, small partial discharge, good thermal stability, and long service life.

What key tests should be performed on the transformer during operation?
To ensure stable operation of the transformer, the following tests must be performed regularly:
(1) Temperature test. The upper oil temperature is a key indicator for measuring the status of the transformer. Its upper limit shall not exceed 85°C, that is, the temperature rise shall not exceed 55°C. Transformers are usually equipped with special temperature measuring devices to monitor this indicator.
(2) Load measurement. In order to make full use of the transformer and reduce power loss, its power supply capacity must be actually measured during the peak power consumption period of each season. The measurement can be carried out directly using a clamp ammeter. The target current value should be controlled within the range of 70-80% of the rated current of the transformer. Exceeding this range indicates overload and needs to be adjusted in time.
(3) Voltage measurement. The regulations stipulate that the voltage fluctuation range should be within ±5% of the rated voltage. If it exceeds this range, it should be adjusted through the tap to ensure that the voltage meets the regulations. Usually, the secondary coil end voltage and the end user end voltage are measured separately with a voltmeter.
(4) Insulation resistance measurement. In order to prevent insulation aging and accidents, the insulation resistance of the transformer must be measured regularly. Before the measurement, the transformer should be stopped and the insulation resistance value should be measured with an ohmmeter, which should not be less than 70% of the previous measurement value. For low-voltage coils, a 500-volt megohmmeter can be used for measurement.

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