Fully Automatic Anti-Interference Dielectric Loss Tester

Product Introduction

MEJS-W801C1 Fully Automatic Anti-Interference Dielectric Loss Tester employs variable-frequency power supply technology. Utilizing microcontroller and electronic techniques for automatic frequency conversion, analog-to-digital conversion, and data processing, it achieves strong anti-interference capability, fast testing speed, high precision, and simple operation.

Transformer Tan Delta Tester The variable-frequency power supply employs a high-power switching power supply, outputting pure sine waves at single frequencies of 50Hz and 60Hz, as well as dual frequencies of 47.5Hz/52.5Hz, 45.0Hz/55.0Hz, 57.5Hz/62.5Hz, and 55.0Hz/65.0Hz. It automatically applies voltage, providing up to 10kV. It automatically filters out 50Hz interference, making it suitable for field testing in environments with high electromagnetic interference, such as substations.

Product Parameter (specification)

1	Usage conditions	-15℃ to 40℃		RH < 80%
2	Anti-interference principle	Frequency conversion method
3	power supply	AC 220V±10%		Allow generator
4	High voltage output	0.5 kV ∽ 10 kV		Every 0.1 kV
		accuracy		2%
		Maximum current		200mA
		capacity		2000VA
5	Self-excited power supply	AC 0V~50V/ 40 A		Single frequency 50.0 Hz , 60.0 Hz Arbitrarily adjustable Dual-band 45.0HZ / 55.0HZ 47.5HZ /52.5HZ 55.0HZ / 65.0HZ 57.5HZ/62.5HZ
6	resolution	tgδ: 0.001%		Cx: 0.001pF
7	accuracy	△tgδ: ±(reading * 1.0% + 0.040%)
		△Cx :±(reading * 1.0% + 1.00PF)
8	Measurement range	tgδ	Unrestricted
		Cx	15pF < Cx < 300nF
			10 kV		Cx ≤ 60 nF
			5 kV		Cx ≤ 150 nF
			1 kV		Cx ≤ 300 nF
		CVT test			Cx ≤ 300 nF
9	External dimensions (Main unit)(mm)	40cm29cm33cm
	External dimensions (Attachment) (mm)	45cm33cm15cm
1 0	Memory size	200 sets support USB flash drive data storage
1 1	Weight (main unit)	2 5.5 kg
	Weight (accessory box)	5.18kg

Product feature and application

1. Features self-excitation testing for CVTs, enabling simultaneous measurement of capacitance and tangent delta (tgδ) for both C1 and C2 with a single wiring connection.

2. Incorporates reverse-wiring low-voltage shielding and high-voltage shielding capabilities. Allows for 10kV reverse-wiring dielectric loss measurement on C11 without disconnecting wires when the CVT bus is grounded.

3. Utilizes frequency conversion technology to eliminate 50Hz power frequency interference, ensuring reliable data acquisition even in environments with strong electromagnetic disturbances.

4. Overcurrent protection prevents instrument damage during specimen short circuits or breakdowns.

5. Grounding protection prevents operation when the instrument is poorly grounded or ungrounded.

6. Includes built-in standard capacitance and high-voltage power supply for convenient field testing and reduced wiring.

7. Features an extra-large LCD display for intuitive operation, with English menu prompts guiding the testing process.

8. Each functional interface displays corresponding wiring diagrams, greatly simplifying operator connections.

9. Includes Chinese-English language switching capability.

Prodection details

MEJS-W801C1 Fully Automatic Anti-Interference Dielectric Loss Tester is suitable for electrical manufacturing, electrical equipment installation, handover, and preventive testing. It can perform insulation loss (tgδ) and capacitance (Cx) measurements on equipment such as CVTs, voltage transformers, current transformers, high-voltage bushings, power transformers, circuit breaker contact capacitance, and standard capacitors in strong electromagnetic interference environments like substations.

Company Qualifications

FAQ

1)What is the core anti-interference technology of the MEJS-W801C1 Fully Automatic Anti-Interference Dielectric Loss Tester, and what effects does this technology achieve?

Answer: The core anti-interference technology is the frequency conversion method. By outputting single-frequency (50Hz, 60Hz) and multiple dual-frequency pure sine waves, it automatically filters out on-site 50Hz power frequency interference. Even in environments with strong electromagnetic interference, such as substations, it ensures reliable measurement data.

2)What convenient features does the MEJS-W801C1 fully automatic anti-interference dielectric loss tester offer for CVT testing?

Answer: It features CVT self-excitation testing capability, enabling simultaneous measurement of C1 and C2 capacitance and tgδ with a single connection. It supports both separate testing (measuring C1 or C2 individually) and simultaneous testing modes. When the CVT bus is grounded, it enables 10kV reverse-connection dielectric loss measurement for C11 without disconnection via low-voltage shielding and high-voltage shielding functions. Each function interface includes corresponding wiring diagrams for ease of operation.

3)What are the critical safety requirements when using the MEJS-W801C1 fully automatic anti-interference dielectric loss tester?

Answer: Key safety requirements include: 1. Use only on de-energized equipment; both the instrument and test equipment must be reliably grounded; 2. High-voltage testing requires at least two personnel: one operator and one supervisor; 3. After testing or instrument malfunction, turn off the power switch and wait one minute before disconnecting cables or inspecting the unit; 4. Never connect or disconnect high-voltage cables while energized; 5. Non-test personnel must stay clear of high-voltage test zones marked with barriers, warning signs, or similar indicators.

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