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- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDWY-250V/10A is a portable, high-power adjustable DC source designed for on-site substation testing, including relay protection, circuit breaker closing/opening, battery charging, and DC system debugging. Adopting high-frequency switching power supply technology (no power frequency transformer), it delivers 0–250V continuous voltage and 0–10A long-term current with precision regulation and low ripple.
Built into a rugged yellow ABS carry case with digital voltage/current meters and multi-protection circuits, it’s lightweight, compact, and field-ready. Widely used in power utilities, industrial plants, and maintenance teams for DC load simulation, device commissioning, and emergency power supply.
Specifications
| Parameter | Specification |
| DC Voltage Output | 0–250V；continuous adjustable；1V resolution |
| DC Current Output | 0–10A (longterm)；0–20A (intermittent) |
| Max Output Power | 2500W |
| Voltage Regulation | ≤±0.5% (no load to full load) |
| Ripple Voltage | ≤0.5% |
| Display | Digital voltage meter + digital current meter |
| Protection | Overvoltage, overcurrent, shortcircuit, overtemperature, soft start |
| Input Power | AC 220V ±10%, 50/60Hz |
| Cooling | Temperaturecontrolled fan |
| Dimensions | 320×240×120mm |
| Weight | ~6.5kg |
| Operating Temp | 10°C ~ +45°C |
| Compliance | DL/T 987, IEC 61010, CE |
Applications
Core Test Objects
· Protective relays: DC 110V/220V relay coils, control circuits
· High-voltage breakers: Closing/opening mechanism operation test
· Storage batteries: 12V–220V lead-acid battery charging & activation
· Substation DC systems: DC panel, distribution box, and secondary circuit debugging
· Industrial control: PLC, contactors, solenoid valves, and DC load simulation
Typical Usage Scenarios
· Substation maintenance: On-site relay & breaker testing without fixed DC source
· Emergency power: Temporary DC supply for field devices during outage
· Battery workshop: Charging & testing various battery packs
· Engineering commissioning: New substation secondary circuit debugging
· Power quality: DC load simulation for power supply stability test
Advantages
All-In-One Field DC Solution
Adjustable voltage + high current + portable case → one unit replaces multiple fixed DC sources
2500W High Power & 10A Long-Term Output
Sufficient power for breaker closing and large relay coils → no load drop
Precision Regulation & Low Ripple
Stable DC output → protects sensitive relay & control devices
Rugged Portable Case
6.5kg + waterproof case → easy transport to any substation
Full Protection & Soft Start
Safe operation in harsh field conditions → no damage from miswiring or overload
FAQ
Q: Can it work for 220V DC relay coils?
A: Yes. 0–250V continuous output covers 220V/110V relay requirements.
Q: What’s the maximum long-term current?
A: 10A continuous;20A for short-time intermittent use.
Q: Is it safe for battery charging?
A: Yes. It has over-voltage/over-current protection and adjustable current to protect batteries.
Q: Can it be used outdoors?
A: Yes. The waterproof carry case and wide temperature range make it suitable for field use.
Q: What’s included in the standard package?
A: Main unit, power cord, DC output cables, user manual, hard carry case.
