5kVA 100kV AC DC Hipot Test Set

Product Introduction

The MEYD and TDM series lightweight oil-immersed test transformers are created based on the Ministry of Machinery and Electronics' "Test Transformers" standard, containing considerable advancements over earlier similar products. The MEYD(G) series test transformers were improved in compliance with the national standard "ZBK-41006-89" to create the TDM(G) series lightweight AC/DC high-voltage test transformers, a new product line. This series boasts small dimensions, lightweight construction, integrated functionality, high adaptability, and user-friendly operation. It is particularly ideal for conducting insulation strength tests under power frequency or DC high voltage on different high-voltage electrical equipment, components, and insulating materials inside power systems, industrial and mining businesses, and research organizations. It acts as vital equipment for high-voltage testing.

Product Parameter (specification)

Model	MEYDJ-W5kVA/100kV (Lightweight Oil-immersed Test Transformer)
Series Affiliation	MEYDJ, TDM Series (including derivative models such as MEYD (G), TDM (G), TDMCZ-(G), etc.)
Rated Capacity	5kVA
Rated Output High Voltage	100kV (Power Frequency AC/DC Selectable; TDM (G) Series Supports AC/DC Switching)
Input Voltage	220V (380V for Models Above 10kVA)
Number of Phases	Single-Phase
Connection Group Designation	I.I.
Angular Frequency	ω=2πf (f Being Test Power Supply Frequency, Power Frequency Standard)

Product feature and application

Compact Design:

Single-frame core iron core + coaxial winding, featuring a small footprint and lightweight construction. The octagonal housing offers an aesthetically pleasing appearance and facilitates easy transportation and installation.

Comprehensive Functionality:

The MEYDJ(G) supports power frequency withstand voltage testing, while the TDM(G) offers switchable AC/DC modes, accommodating DC withstand voltage and leakage testing.

Flexible Scalability:

Supports cascading multiple units to double output voltage; single units operate independently for cost-effective deployment.

Precision and Reliability:

Paired with a dedicated control console, it offers adjustable multi-speed voltage ramping. The high-voltage side supports connection to resistor-capacitor voltage dividers for accurate measurements. Built-in multiple protection components ensure safe testing.

Versatility:

Suitable for power, industrial, mining, and research applications. Tests various high-voltage electrical equipment and insulating materials. Comprehensive accessory range accommodates diverse testing requirements.

Prodection details

This device is used to conduct power frequency/direct current high-voltage insulation strength tests on high-voltage electrical equipment, electrical components, and insulating materials. It is appropriate for power systems, industrial and mining businesses, and research organizations.

Company Qualifications

FAQ

1)How does the MEYDJ-W5kVA/100kV power frequency AC/DC withstand voltage test device switch between AC and DC modes?

Answer: The TDM (G) series in this device supports AC/DC mode switching. This is achieved by controlling the high-voltage silicon stack via a shorting rod:
- When the shorting rod is closed, the high-voltage silicon stack is bypassed, and the device outputs power frequency high voltage (AC mode). When the shorting bar is withdrawn, the high-voltage silicon stack is connected in series with the high-voltage circuit for half-wave rectification, and the device outputs high-voltage DC (DC mode). The MEYDJ (G) series does not have a high-voltage silicon stack and only supports power frequency AC mode, requiring no switching.

2)What are the special grounding requirements for equipment when performing cascaded tests using the MEYDJ-W5kVA/100kV Power Frequency AC/DC Withstand Voltage Test Device?

Answer: During cascaded testing, grounding must meet the following requirements: ① The enclosure of the primary-level test transformer must be directly and reliably grounded; ② The X terminals of the low-voltage windings, the F terminals of the measuring windings, and the X terminals of the high-voltage tails for both the secondary-level and tertiary-level test transformers must all be connected to the equipment enclosure of their respective levels; ③ The enclosures of the secondary-level and tertiary-level equipment must not be directly grounded. They must be insulated from ground via insulating supports to prevent high-voltage potential conflicts.

3)What actions should be taken when abnormal conditions occur during testing with the MEYDJ-W5kVA/100kV power frequency AC/DC withstand voltage test set?

Answer: If the following abnormal conditions are detected during testing-such as significant needle deflection on the voltmeter, charred insulation emitting smoke, unusual sounds from the test specimen, or breakdown/flashing-immediately perform the following actions: ① Rapidly reduce voltage to prevent fault escalation; ② Disconnect the power supply to eliminate high-voltage hazards; ③ Cease testing, investigate the cause of the abnormality, and only resume testing after resolving the issue. Never continue operation with a fault present.

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