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China JDZ(18)-3, 6, 10 Type Voltage Transformers - Reliable Suppliers and Factory for 3-10kV AC Power Systems

The JDZ(18)-3, 6, and 10 type voltage transformers are high-quality electrical components designed for AC power systems with a rated frequency of 50Hz or 60Hz and a voltage range of 3-10kV. These transformers are essential for electric energy metering, accurate voltage measurement, and reliable relay protection. Manufactured in China, they adhere to strict industry standards, including GB20840.1-2010 and GB20840.3-201As a leading supplier in the market, our factory produces these voltage transformers to meet the needs of various electrical applications, ensuring durability and efficiency for our clients

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Product Detail

Model and Its Meaning

JDZ(18)-3、6、10 Voltage Transformer Model Diagram

Overview

⚡ Voltage transformers (VTs) play a vital role in the operation and safety of AC power systems, particularly those operating at a rated frequency of 50Hz or 60Hz and with a rated voltage range of 3–10kV. These devices are designed for energy metering, voltage measurement, and relay protection, ensuring efficient and safe power system operation. Voltage transformers comply with GB20840.1-2010 and GB20840.3-2013 standards, providing reliable solutions for a variety of applications in industrial and commercial environments.

Normal Service Conditions

🏢

Installation Site: Indoor

🌡️

Ambient Temperature: Maximum temperature is 40℃, minimum temperature is -5℃, and the daily average temperature does not exceed 30℃.

🌤️

Atmospheric Conditions: There is no severe pollution in the atmosphere.

Technical Parameters

Product Model	Rated Voltage Ratio	Accuracy Level	Rated Output (VA)	Extreme Output (VA)	Rated Insulation Level (KV)
JDZ(18)-3	3/0.1	0.2	15	200	3.6/25/40
		0.5	30
JDZ(18)-6	6/0.1	0.2	15	200	7.2/32/60
		0.5	30
JDZ(18)-10	10/0.1	0.2	15	200	12/42/75
		0.5	30
JDZ(18)-3	3/0.1/0.22	0.2/3	15/500	600	3.6/25/40
		0.5/3	30/500
JDZ(18)-6	6/0.1/0.22	0.2/3	15/500	600	7.2/32/60
		0.5/3	30/500
JDZ(18)-10	10/0.1/0.22	0.2/3	15/500	600	12/42/75
		0.5/3	30/500

Structure and Characteristics

This series of voltage transformers adopt a pillar structure and are fully enclosed with epoxy resin by epoxy casting. Key features include:

🛡️ Resistant to pollution and moisture, and suitable for use in tropical regions.
🔧 No special maintenance required — only regular cleaning of surface dirt is needed.
🔌 Terminal boxes are installed at the secondary output terminals. One hole on the front and one on the side of the terminal box cooperate with the output terminals for leadout wiring, ensuring safe and reliable connections.
⚙️ Equipped with grounding bolts and six installation holes for secure mounting on the product base plate.

Frequently Asked Questions (FAQ)

❓ What are the rated voltage options available for the JDZ(18) series voltage transformers?

The JDZ(18) series is available in three rated voltage models: JDZ(18)-3 (3kV), JDZ(18)-6 (6kV), and JDZ(18)-10 (10kV), with corresponding voltage ratios of 3/0.1, 6/0.1, and 10/0.1 respectively. Dual secondary winding versions with ratios such as 3/0.1/0.22, 6/0.1/0.22, and 10/0.1/0.22 are also available.

❓ What accuracy levels are available for the JDZ(18) series?

The JDZ(18) series voltage transformers are available in accuracy levels 0.2 and 0.5 for single secondary winding models, and 0.2/3 and 0.5/3 for dual secondary winding models. The 0.2 level is ideal for precision energy metering, while the 0.5 level is suitable for general measurement and relay protection.

❓ What standards do the JDZ(18) series voltage transformers comply with?

The JDZ(18) series voltage transformers comply with Chinese national standards GB20840.1-2010 (general requirements for instrument transformers) and GB20840.3-2013 (specific requirements for inductive voltage transformers), ensuring product quality and safety.

❓ Are the JDZ(18) voltage transformers suitable for humid or tropical environments?

Yes. The JDZ(18) series uses a fully enclosed epoxy resin casting design, which provides excellent resistance to moisture and pollution. This makes them well-suited for use in tropical regions and environments with higher humidity levels, though they are designed for indoor installation.

❓ What maintenance is required for the JDZ(18) series voltage transformers?

The JDZ(18) series requires minimal maintenance. No special maintenance procedures are needed during normal operation. It is only necessary to perform regular cleaning of surface dirt to maintain performance and appearance. This low-maintenance design reduces operational costs over the product's lifetime.

❓ What is the operating temperature range for the JDZ(18) series?

The JDZ(18) series voltage transformers are designed to operate within an ambient temperature range of -5℃ to +40℃, with a daily average temperature not exceeding 30℃. They are intended for indoor installation in environments free from severe atmospheric pollution.