LZZBJ4-35 current transformer is a kind of sensor used to measure large current, mainly used in substations, power systems and electrical equipment, etc. The transformer adopts magnetic core type DC current transformer, which is characterized by high linearity, strong anti-interference ability, small volume, simple structure, etc., and it is a kind of very high cost-effective current transformer.

Products Specification

NO.	Main technical parameters
1	Rated voltage	kV	40.5
2	Primary current	A	50-1200
3	Secondary current	A	5/1
4	Measurement level	-	0.2/0.2S/0.5/0.5S
5	Protection level	-	5P/10P

Scope of application

The applicable scope of LZZBJ4-35 current transformer is as follows.

vacuum circuit breaker factory

Mounting method: Vertical.

Compatible with: 35kV circuit breakers.

Products advantages

Safe and Reliable:

Electrical Isolation: Current transformers effectively isolate high-voltage, high-current primary circuits from low-voltage, low-current secondary measurement and protection circuits, preventing operators from direct contact with high-voltage currents, significantly reducing the risk of electric shock and ensuring personnel safety.
Strong Anti-Interference: Based on the principle of electromagnetic induction, they do not affect or interfere with the measured circuits, ensuring accurate and reliable measurement results. They can operate stably in complex electrical environments, providing a strong guarantee for the safe operation of power systems.

High Measurement Accuracy:

Output signal accuracy can reach Class 0.5, Class 0.2, or even higher, meeting the needs of applications requiring high current signal accuracy. Whether in normal power system operation or during transient conditions during faults, they can accurately measure current, providing precise data support for relay protection, metering, monitoring, and other applications.

Wide Measurement Range:

They are suitable for different voltage and current levels, meeting the needs of various power system and industrial applications. Modern current transformers typically feature multiple adjustable measurement ranges. By adjusting the transformer's transformation ratio, they can accommodate currents of varying magnitudes, offering high versatility and flexibility.

Small Size and Light Weight:

Made of insulating materials and fine-grained conductors, they boast a compact, lightweight design, making them easy to install and maintain. In space-constrained electrical equipment, such as switchgear and distribution boxes, current transformers can be easily installed without excessive burden or space consumption.

Excellent Dynamic Performance:

They can quickly and accurately respond to current changes, exhibiting excellent frequency response and dynamic characteristics. They are suitable for applications with wide current ranges and demanding waveform requirements, such as short-circuit fault detection and protection in power systems. When a short-circuit fault occurs, the current transformer can quickly and accurately reflect the magnitude and changes of the fault current, providing a reliable signal for rapid action of protective devices.

Low Power Consumption:

Current transformers consume very little energy during operation, placing virtually no additional load on the circuit being measured. This enables current transformers to maintain stable performance over extended periods of use, reducing energy consumption and minimizing impact on power systems.

Facilitates equipment standardization:

Current transformers can convert high currents into standard low-current signals (such as 5A or 1A), standardizing the specifications of secondary instruments, relays, and other equipment. This facilitates standardized design and production of these devices, reducing production costs and maintenance.

Product Applications

LZZBJ4-35 current transformer has a wide range of applications.

Power systems

substations, distribution cabinets

Industrial equipment

motor and inverter current monitoring

New energy

photovoltaic and wind power current detection

Products outline drawing

Five Major Application Scenarios of Current Transformers in Transformers

Current Measurement

Current transformers convert large currents on the primary side of the transformer into smaller currents on the secondary side, making measurements more accurate and convenient. This allows instruments to easily measure current, ensuring the normal operation of the power system.

Metering and Billing

Current transformers are also used for electricity metering and billing. They convert the primary side current into a smaller current on the secondary side, facilitating metering and billing using electricity meters and ensuring fair transactions in the power system.

CT supplier

Protection and Control

When a fault such as a short circuit occurs on the primary side of the transformer, the current transformer can quickly transmit the fault current information to the protection device, triggering protection actions and disconnecting the power supply, thereby protecting the transformer and the power system.

Power Factor Adjustment

Through the detection of current transformers, the power factor can be optimized, improving the efficiency of the power system. When the power factor is too low, current transformers can provide necessary information to help adjust the load, thereby improving the overall performance of the power system.

Fault Diagnosis: Current transformers can also be used for fault diagnosis. When a transformer fails, the current transformer can detect abnormal current signals, providing a basis for fault diagnosis. By analyzing and processing the current signals, the type and location of the fault can be determined, allowing for appropriate maintenance measures to be taken.

In summary, the applications of current transformers in transformers are multifaceted, ranging from current measurement and protection control, metering and billing, power factor adjustment, to fault diagnosis, providing a strong guarantee for the safe and stable operation of transformers.