I. Test Object Parameters and Maximum Testing Capacity

1. Power Transformers (including Grounding Transformers)

Voltage Level: 35kV and below (rated 38.5kV), including 35/20/10/6/0.8/0.69/0.4/0.23kV

Capacity: 35kV ≤ 5000kVA, 20kV ≤ 3000kVA, 10kV ≤ 2500kVA; Grounding transformers are available with or without low-voltage windings, with the maximum capacity of low-voltage windings being 800kVA

Frequency: 50/60Hz, induction testing at 100-200Hz

Impedance Voltage: 4%-12%

2. Arc Suppression Coils

Voltage Level: 10kV (10.5/3kV), 35kV (38.5/3kV)

Capacity: 10kV ≤ 2000kVA, 35kV ≤ 2200kVA

Taps / Current Regulation: Tap-changing type with 9/14/19/25 taps (20%-110%), capacity-regulating type with 16/32 taps (0%-110%), phase-controlled stepless regulation (0%-110%)

Frequency: 50/60Hz, induction testing at 100-200Hz

3. Dry-Type Iron-Core Series Reactors

Voltage Level: 10kV and below (10.5kV), including 10/6kV

Capacity: 10kV ≤ 1200kvar; Reactance Rate: 5%-12%

Frequency: 50/60Hz, induction testing at 100-200Hz

II. Test Items (Power Transformers / Grounding Transformers)

1. Winding DC Resistance Test

2. Turns Ratio and Connection Group Measurement (8 Columns)

3. Insulation Resistance Test

4. Power Frequency Withstand Voltage Test

5. No-Load Loss / Current Measurement, Calculation of No-Load Current Percentage, and No-Load Harmonic Measurement

6. Load Loss / Short-Circuit Impedance Measurement, Standard Temperature Conversion (Rated / Maximum / Minimum Taps)

7. Zero-Sequence Impedance Measurement (Rated / Maximum / Minimum Taps)

8. Induction Withstand Voltage Test (Noise-Shielded Chamber)

9. Partial Discharge Test (Noise-Shielded Chamber, Live Background < 3 pC)

10. Noise Test (Noise-Shielded Chamber)

III. Project Highlights

1. Comprehensive Coverage of All Product Types: Compatible with all categories of transformers, arc suppression coils, and reactors up to 35kV, precisely meeting customers’ core product testing needs

2. Full Compatibility with All Test Types: Supports routine, type, and special tests, covering multiple specialized inspections to reduce costs and improve efficiency

3. Precise Testing Assurance: Key tests are conducted in noise-shielded chambers, with partial discharge background < 3 pC, effectively isolating interference for accurate and reliable test data

4. Intelligent and Efficient Operation: Automatic parameter collection and automatic temperature conversion, achieving full-process intelligence and significantly shortening product testing cycles

5. Customized On-Site Solutions: Integrated layout of control room, equipment area, and shielding chamber, perfectly matching customers’ existing production lines for convenient operation

6. Mature End-to-End Services: Well-established technical solutions that can be quickly implemented, providing integrated services of design, installation & commissioning, training, and operation & maintenance to ensure smooth and stable commissioning throughout the process