Dc Power Supply Test Equipment

Product Introduction

The MOEORW-W5203 DC test power supply is a fundamental preventive test to ensure the safe operation of high-voltage circuit breakers in power systems. Currently, power departments primarily employ the following two methods for testing:

1. Utilizing the DC system from the on-site control cabinet as the test power source, with voltage adjusted via a sliding resistor. The primary drawback of this method is that any short circuit in the test wiring or direct DC grounding would directly impact the entire on-site DC system. Minor incidents could result in loss of protection for high-voltage equipment, while severe cases could cause the entire on-site DC system to collapse.

2. Using on-site AC power, which undergoes simple silicon rectification via a voltage regulator before direct DC output. The disadvantages of this method are: ① The voltage regulator is bulky, inconvenient to use, and produces significant DC ripple; ② There is no isolation between input and output, potentially causing the casing to become energized and posing a risk to personnel safety.

In light of the above, our company has developed and introduced a new generation of high-voltage switch closing/opening power supplies. This power supply features complete isolation between input and output, delivering stable and reliable DC output with a low ripple factor. It includes overcurrent and overvoltage protection, boasts an aesthetically pleasing design, is compact and lightweight, and offers simple wiring and operation. This power supply provides an independent test power source for on-site high-voltage switch closing and tripping operation tests. It avoids direct use of the DC system within the on-site control cabinet, effectively preventing potential hazards to the on-site DC system and ensuring safe operation of on-site equipment.

Product Parameter (specification)

Ambient Temperature	-10 to 50°C (14 to 122°F)
Ambient Humidity	≤75% RH
Input Power	AC 220V ±10%
DC Output	0 to 250V continuously adjustable, 0-50A
Ripple Factor	＜3%
Voltage Stability	＜3%

Product feature and application

1. Fully isolated input/output with overcurrent and overvoltage protection for safety and reliability;

2. Stable DC output with ripple coefficient and voltage stability both <3%;

3. Continuously adjustable 0–250V DC output and 0–50A current for high adaptability;

4. Compact size, simple wiring operation, and intuitive digital display monitoring;

5. Independent power supply to avoid interfering with existing DC systems on-site;

6. Operates in environments from -10°C to 50°C with ≤75% RH, featuring excellent heat dissipation

Prodection details

At the site for preventive testing of high-voltage circuit breaker closing and tripping in power systems, provide an independent test power source.

Company Qualifications

FAQ

1)What grounding procedures must be performed before using the MOEORW-W5203 DC test power supply?

Answer: To prevent static electricity buildup on the instrument during operation, the main unit must be reliably grounded via the grounding terminal before testing.

2)How does the MOEORW-W5203 DC test power supply avoid affecting the existing DC system on-site?

Answer: This power supply functions as an independent test power source with fully isolated input and output. It does not rely on the DC system within the on-site control cabinet for testing. Therefore, it effectively prevents potential hazards such as short circuits or system crashes that could occur to the on-site DC system during testing.

3)How should abnormal conditions be handled during testing with the MOEORW-W5203 DC test power supply?

Answer: If abnormalities occur during testing, immediately disconnect the power supply to prevent instrument damage or escalating safety risks. Contact the manufacturer promptly when the instrument malfunctions; do not attempt repairs yourself.

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