The triple frequency power generator is used for testing power transformers, voltage transformers, and other test objects. In addition to performing external power frequency high voltage tests on the main insulation of fully insulated transformers, it is also necessary to conduct induced high voltage tests on the longitudinal insulation of transformers and the main insulation of semi-insulated transformers.
- Chinese Name
- Triple Frequency Induced Withstand Voltage Generator
- Power Supply Conditions
- Three-phase 380V/50Hz
- Capacity
- 1-1000KVA
- Waveform
- Sine wave, distortion less than 1%
According to national test standards, the induced test voltage for power transformers and voltage transformers is approximately 2-3 times the maximum working phase voltage. As is well known, when a transformer operates at rated frequency and rated voltage, the iron core is close to saturation. If a test voltage higher than the rated voltage is applied across the windings of the transformer under test using a power frequency supply, the no-load excitation current will increase sharply to an unacceptable level. From the relationship of induced electromotive force, it can be seen that to apply a test voltage higher than the rated voltage without saturating the iron core, the method of increasing the power frequency can be adopted, and a generator with a frequency higher than the power frequency must be used. It is simple to operate, reliable in performance, and can well meet the needs of induced withstand voltage testing for transformers andinstrument transformers.
【Operating Environment】
1. Power supply conditions: Three-phase 380V/50Hz
2. Output voltage: 50-500V (max 750V), 150Hz;
100-1000V (max 1500V), 150Hz;
3. Capacity: 1-1000KVA;
4. Waveform: Sine wave, distortion less than 1%;
5. Load characteristics: Suitable for resistive, inductive, and capacitive loads;
Product Structure
It consists of a three-phase five-limb transformer (or three single-phase transformers), a single-phase voltage regulator, reactors, and a control section. According to user requirements, the appearance can be integrated or split-type movable.
Applications
1. Widely used for multiple frequency induced withstand voltage tests on voltage transformers.
2. Conduct phase-by-phase multiple frequency induced withstand voltage tests on power transformers.
3. Conduct multiple frequency induced withstand voltage tests on other inductive coil-type electrical products.
Configuration Table
| Model | DF3003 | DF3005 | DF3010 | DF3015 | |||
| Output Power | 3kVA | 5kVA | 10kVA | 15kVA | |||
| Output Frequency | 45HZ-300HZ frequency continuously adjustable, adjustment step 0.1HZ. (Frequency adjustment range can be customized) | ||||||
| Output Voltage | 0V-400V sine wave, continuously adjustable, adjustment step 0.1V. (Voltage output range can be customized) | ||||||
| Waveform Distortion Rate | Pure sine wave, distortion rate ≤2% | ||||||
| Output Isolation | Complete isolation between input and output, isolation voltage not less than AC3kV, 1min | ||||||
| Output Voltage Stability | Automatic voltage stabilization, voltage stability ≤1% | ||||||
| Minimum Voltage Resolution | 0.1V | ||||||
| Minimum Current Resolution | 0.01A | ||||||
| Measurement Accuracy | +-0.5% | ||||||
| Instrument Weight | 20Kg | 15+25Kg | 18+30Kg | 20+33Kg | |||
