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LMK1(BH)-0.66 current transformer

0102030405

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China LQZJ1(4,5)-0.66 Series Current Transformers - Reliable Suppliers from Factory for Power Measurement and Protection

The LQZJ1(4,5)-0.66 series current transformers are essential components for power systems, designed to operate efficiently at rated frequencies of 50Hz or 60Hz and voltages of 0.66kV or lower. These transformers facilitate accurate current and energy measurement, as well as provide reliable relay protection. Manufactured in China, these products comply with the execution standards GB20840.1-2010 and GB20840.2-2014, ensuring high quality and performance. As a reputable supplier and factory, we deliver products that meet the demands of modern power systems

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Product Detail

Model and its meaning

Normal Usage Conditions

Installation site: LQZJ1,4-0.66 is indoor. LQZJ5-0.66 is for outdoor use.
Ambient temperature:
LQZJ1,4-0.66: Maximum air temperature 40℃; Minimum temperature -5℃; Daily average temperature does not exceed 30℃.

LQZJ5-0.66: Maximum temperature 40℃; Minimum temperature -25℃; Daily average temperature does not exceed 30℃.
Atmospheric conditions: There is no severe pollution in the atmosphere.

Technical Parameters

Model	Rated Voltage Ratio	Rated Output				Rated Short-term Thermal Stability Current	Rated Dynamic Stable Current
		0.2	0.2S	0.5S	0.5
LQZJ1(4,5)-0.66	30、40、50、75、100、150、 200、250、300、400、500、 600、800、1000、1200、1500	10				50	100

⚡ Rated Secondary Current: 5A or 1A

🔒 Rated Insulation Level: 0.66 / 3kV

Structure and Characteristics

🏗️

Fully Enclosed Cast Design Primary and secondary windings as well as the core are all cast in polyester resin.

🛡️

Excellent Insulation & Moisture Resistance Polyester resin casting provides superior insulation performance and moisture resistance.

📐

Installation Base Plate Equipped at the bottom or on one side for flexible mounting options.

🔐

Anti-electricity Theft Cover The secondary outgoing line end is equipped with a protective anti-theft cover.

⚖️

Compact & Lightweight Small in size and light in weight, ideal for modern installations.

🔄

Upgraded Alternative Direct replacement for the old model LQG-0.5 with improved performance.

Frequently Asked Questions

Q What is the difference between LQZJ1,4-0.66 and LQZJ5-0.66 in terms of installation environment?

LQZJ1,4-0.66 is designed for indoor installation, while LQZJ5-0.66 is suitable for outdoor use. The key difference also lies in their minimum ambient temperature ratings: LQZJ1,4-0.66 supports a minimum of -5℃, whereas LQZJ5-0.66 can operate in temperatures as low as -25℃, making it more suitable for harsh outdoor environments.

Q What rated secondary current options are available for the LQZJ1(4,5)-0.66 current transformer?

The LQZJ1(4,5)-0.66 current transformer offers two rated secondary current options: 5A and 1A. The appropriate choice depends on the specific metering or protection requirements of the electrical system.

Q What is the rated insulation level of the LQZJ1(4,5)-0.66 series?

The rated insulation level of the LQZJ1(4,5)-0.66 series is 0.66/3kV. This means it is designed for use in low-voltage systems up to 0.66kV, with a withstand voltage capability of 3kV, ensuring reliable dielectric performance and safety.

Q What material is used in the construction of this current transformer, and what are its benefits?

This series of current transformers is fully enclosed and cast with polyester resin. The primary and secondary windings, along with the core, are all embedded within the resin. This construction provides excellent insulation performance, strong moisture resistance, compact size, and light weight — making it highly reliable for long-term use in various environments.

Q What is the rated short-term thermal stability current and rated dynamic stable current of the LQZJ1(4,5)-0.66?

The LQZJ1(4,5)-0.66 has a rated short-term thermal stability current of 50 (times rated current) and a rated dynamic stable current of 100 (times rated current). These values indicate the transformer's ability to withstand short-circuit conditions without damage.

Q Is the LQZJ1(4,5)-0.66 a replacement for any older current transformer model?

Yes. The LQZJ1(4,5)-0.66 series is the updated alternative to the old model LQG-0.5. It offers improved insulation performance, a more compact and lightweight design, and an anti-electricity theft cover on the secondary outgoing line end, making it a superior upgrade for modern electrical installations.