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- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDYD-137D is a professional, portable digital manual control box designed for power frequency withstand voltage test systems, providing precise voltage regulation, real-time measurement, and comprehensive safety protection for test transformers. It fully complies with DL/T 848.2-2004 and DL/T 474.4-2006, adopting high-precision digital measurement technology and industrial-grade components to deliver stable performance and reliable operation in harsh field environments.
Equipped with 4 high-brightness 4-digit digital LED meters, it simultaneously displays high-voltage side voltage, high-voltage side current, low-voltage side current, and test time with clear readings even under strong sunlight. It features smooth manual voltage regulation, 1s-99H adjustable timing function, and comprehensive safety protection including zero-start, over-current, breakdown, and emergency stop, ensuring maximum safety for operators and test samples. Housed in a rugged aluminum alloy carrying case, it is compatible with all types of test transformers (oil-immersed, dry, SF6) and ideal for on-site commissioning, periodic maintenance, and factory quality control of power cables, transformers, switchgear, and insulators.
Specifications
|
Parameter |
Specification |
|
Input Power |
Single-phase AC220V±10%, 50Hz |
|
Rated Capacity |
7kVA |
|
Output Voltage |
0-250V AC (linear adjustable, zero-start) |
|
Rated Output Current |
35A |
|
Compatible Transformer Capacity |
5kVA-20kVA |
|
Voltage Ratio Setting |
100:1 to 1000:1 (user-settable) |
|
Display |
4 independent 4-digit digital LED meters |
|
Measured Parameters |
HV voltage (0-140kV), HV current (0-50mA), LV current (0-35A), Time (1s-99H) |
|
Measurement Accuracy |
Voltage ±1.5% F.S；Current ±2.5% F.S |
|
Timing Range |
1s-99H adjustable；audible and visual alarm |
|
Protection Functions |
Zero-start, Over-current (10-110% adjustable), Breakdown, Emergency stop |
|
Housing Material |
Rugged aluminum alloy carrying case |
|
Dimensions (mm) |
490×370×510 |
|
Weight |
~39kg |
|
Operating Temperature |
-20℃ ~ +50℃；Humidity ≤85%RH (non-condensing) |
|
Compliance |
DL/T 848.2-2004, DL/T 474.4-2006, GB/T 16927.1-2011, IEC 60060-1, IEC 61010-1 CAT III 600V |
Applications
Core Application Scenarios
- Power frequency withstand voltage test: control box for test transformer systems
- On-site substation testing: commissioning and maintenance of 10kV-110kV electrical equipment
- Factory quality control: production line testing of transformers, switchgear, and cables
- Electrical safety tool testing: periodic testing of insulating gloves, boots, and rods
- Research and development: laboratory insulation testing of new electrical products
Compatible Test Objects (with matching test transformer)
- Power cables: 10kV-110kV XLPE/PVC insulated cables
- Power transformers: 10kV-110kV distribution and power transformers
- Switchgear & GIS: 10kV-110kV vacuum breakers, load switches, busbars
- Insulators & bushings: high-voltage insulators, transformer bushings
- Electrical safety tools: insulating gloves, boots, rods, blankets
Advantages
4-Channel Simultaneous Digital Display
Clear, high-brightness LED meters；real-time monitoring of all test parameters → eliminates reading errors, improves test efficiency
Comprehensive Safety Protection
Multiple protection layers + hard-wired emergency stop → maximum safety for operators and expensive test equipment
Wide Compatibility
Compatible with all types of test transformers (oil-immersed, dry, SF6) → flexible for different test requirements, reduces equipment investment
Portable Aluminum Alloy Case
Rugged, lightweight design；easy to transport and use in remote field locations → ideal for on-site substation testing
Simple Manual Operation
Intuitive knob and button control；no professional training required → easy to use for field technicians
Industrial-Grade Reliability
High-quality components and robust construction → long service life, stable performance in harsh environments
FAQ
Q: Is GDYD-137D a complete test system or just a control box?
A: It is an independent control box unit that needs to be used with a test transformer. It is compatible with all types of test transformers (oil-immersed, dry, SF6) with a capacity of 5kVA-20kVA.
Q: What parameters does it display?
A: It simultaneously displays high-voltage side voltage, high-voltage side current, low-voltage side current, and test time on 4 independent digital LED meters.
Q: Can it be used with different voltage ratio transformers?
A: Yes. The voltage ratio is user-settable from 100:1 to 1000:1, making it compatible with transformers of different voltage levels.
