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HF-TC-651 Transformer Demagnetization Device
This Transformer Demagnetization Device effectively removes residual magnetism inside transformer cores after DC resistance tests. It suppresses magnetizing inrush current, prevents protection maloperation and ensures accurate follow-up transformer testing.
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HF-TC-651 Automatic Transformer Demagnetization Device is designed to eliminate residual magnetism of large power transformers after DC resistance tests. It plays a vital role in protecting transformers from inrush current impact, ensuring safe commissioning and extending transformer service life.
Product Features
- Operates with standard AC 220V mains power available on site.
- Compact size and light weight for easy transportation.
- Fast demagnetization. It only requires one or two cycles for three-phase transformers.
- Outstanding demagnetization performance.
- Simple operation; start with one button. Percentage progress indicator is displayed during demagnetization.
- Suitable for residual magnetism removal before transformer commissioning.
- Six current gears: 10A, 5A, 2A, 1A, 200mA and auto mode to meet various working conditions.
Technical Specifications
- Demagnetization Current: 6 gears (Auto, 10A, 5A, 1A, 500mA, 200mA)
- Dimensions: 400mm × 310mm × 160mm (L×W×H)
- Weight: 6.5kg
- Operating Temperature: -10℃ ~ 50℃
- Relative Humidity: ≤85%RH
- Power Supply: AC220V±10%
- Power Frequency: 50±10Hz
Packing List
| No. | Description | Qty | Unit |
|---|---|---|---|
| 1 | Main Device | 1 | Unit |
| 2 | Power Cord | 1 | Piece |
| 3 | 10m (12m optional) Test Lead Set | 1 | Set |
| 4 | 5m Ground Cable Set | 1 | Set |
| 5 | Cable Storage Case | 1 | Piece |
| 6 | 10A Fuse Tube | 2 | Pieces |
| 7 | Operation Manual | 1 | Copy |
| 8 | Factory Test Report | 1 | Copy |
| 9 | Certificate of Conformity | 1 | Copy |
FAQ for Transformer Demagnetization Device
Q1: When should transformer demagnetization be carried out?
A1: Demagnetization must be performed after DC resistance testing to eliminate residual magnetism in transformer cores before switching on.
Q2: How many times do I need to run demagnetization for a three-phase transformer?
A2: Normally one to two cycles are sufficient to achieve ideal demagnetization results.
Q3: What power supply does this device require?
A3: Standard single-phase AC220V mains, widely available at substation test sites.
Q4: What current options are provided?
A4: It supports Auto, 10A, 5A, 1A, 500mA and 200mA gears to adapt to different transformer capacities.
Q5: Can I check the working status during operation?
A5: Yes. The screen displays real-time progress percentage throughout the demagnetization cycle.
Q6: What are the transportation and on-site advantages?
A6: The total weight is only 6.5kg with compact dimensions, convenient for field testing and outdoor commissioning work.
Q7: What risks will residual magnetism bring if demagnetization is skipped?
A7: Remanence will cause huge magnetizing inrush current during switch-on, trigger relay misoperation and possibly damage transformer windings.
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