Eti-Polam CTR-30 Current Transformer 150/5A 3.75VA Class 0.5

The Eti-Polam CTR-30 current transformer is a precision-engineered component designed for accurate electrical measurement and monitoring in power distribution systems. With a transformation ratio of 150/5A and a rated power of 3.75VA, this device provides reliable data for energy management and metering applications. It is built to meet Class 0.5 accuracy standards, ensuring consistent performance in demanding industrial and commercial environments.

Advantages

This current transformer offers high measurement precision, which is essential for maintaining accurate energy billing and system monitoring. Its robust construction ensures long-term durability and stability under continuous operation. The compact design facilitates easy installation within standard electrical panels, while the standardized transformation ratio ensures seamless compatibility with a wide range of secondary metering equipment and protection relays.

Suitable for

• Industrial power distribution monitoring
• Commercial energy metering systems
• Electrical load management and analysis
• Integration with digital power meters and analog ammeters

When it may not be suitable

This device is not intended for high-voltage applications exceeding its specified insulation levels. It is also not suitable for measuring currents outside the 150A primary range, as this would compromise accuracy and potentially damage the secondary equipment.

Key specifications

• Transformation ratio: 150/5A
• Rated power: 3.75VA
• Accuracy class: 0.5
• Mounting type: Panel or busbar mounting

How to use

The CTR-30 should be installed by a qualified professional in accordance with local electrical safety regulations. The primary conductor is passed through the aperture of the transformer. The secondary terminals must be connected to the measuring device using appropriate gauge wiring. Ensure that the secondary circuit is never left open while the primary circuit is energized to prevent dangerous voltage build-up.

What to consider before purchase

• Verify that the primary current matches your system requirements
• Ensure the secondary side burden does not exceed the 3.75VA rating
• Check available space in your electrical cabinet for mounting

Usage recommendations

Always ensure that the secondary terminals are properly terminated or short-circuited before energizing the primary circuit to maintain safety and measurement integrity.