Lumel LCTB 6240 Current Transformer, 400A/5A, Busbar Opening 62/40mm

The Lumel LCTB 6240 current transformer is a high-precision device engineered for the accurate measurement of electrical currents in industrial power systems. With a transformation ratio of 400A/5A, it effectively converts high primary currents into a manageable secondary signal suitable for monitoring, metering, and protection relays. Its robust construction and specific busbar opening dimensions make it a reliable component for maintaining system integrity and operational efficiency in demanding electrical environments.

Advantages

This current transformer offers exceptional measurement accuracy, ensuring that connected monitoring equipment receives precise data for system analysis. The design facilitates straightforward installation on busbars, reducing downtime during integration into existing electrical panels. By providing a stable and reliable signal conversion, it supports the long-term performance of protection devices and energy meters, contributing to overall grid stability and safety.

Suitable for

• Industrial power distribution networks
• Electrical energy metering systems
• Protection and control relay applications
• Monitoring of high-current electrical circuits

When it may not be suitable

This device is not intended for use in low-current applications where the primary current is significantly below the rated range, as accuracy may be compromised. It is also not suitable for outdoor environments without appropriate protective enclosures, as it is designed for installation within electrical cabinets.

Key specifications

• Transformation ratio: 400A/5A
• Busbar opening dimensions: 62mm x 40mm
• Application: Current measurement and signal conversion
• Compatibility: Standard industrial monitoring and protection equipment

How to use

Installation should be performed by qualified personnel in accordance with local electrical safety regulations. The transformer is mounted by passing the primary busbar through the 62/40mm opening. Ensure that the busbar is centered and securely fastened to prevent vibration. The secondary terminals should be connected to the measuring or protection device using appropriate wiring, ensuring that the polarity is correct to maintain measurement accuracy.

What to consider before purchase

• Verify that the primary current of your system matches the 400A rating.
• Check that your busbar dimensions are compatible with the 62mm x 40mm opening.
• Ensure the secondary side is connected to a device compatible with a 5A input.
• Confirm that the installation environment meets the necessary safety and temperature requirements.

Usage recommendations

Always ensure the secondary circuit is connected to a load or short-circuited before energizing the primary circuit to prevent dangerous voltage buildup. Regularly inspect connections for tightness and signs of thermal stress.