📝 Description

Used product.
SIRIO current transformer, identified by the 100/0.2 A marking and visible code 151100 0542. This component is designed to measure alternating current by converting the primary current into a proportional secondary current signal while maintaining galvanic isolation between the measured circuit and the measurement circuit.
The device features a central through-hole for the conductor being monitored and Faston-type blade terminals for electrical connections. Its compact construction and insulating housing make it suitable for integration into electrical and electronic equipment.
The SIRIO current transformer product family includes models designed for mains-frequency current measurement in monitoring, control and protection systems. Technical documentation for the corresponding model identifies the 100 A / 0.2 A ratio, matching the visible marking.

⚙️ Main Specifications

• Brand: SIRIO
• Type: Current transformer
• Visible code: 151100 0542
• Nominal ratio: 100 A / 0.2 A
• Rated primary current: 100 A
• Rated secondary current: 0.2 A
• Transformation ratio: 500:1
• Installation type: Through-hole for the primary conductor
• Secondary connections: Faston terminals
• Application: AC current measurement
• Insulation: Galvanic isolation between primary and secondary circuits
  Note: The nominal ratio is taken from the component marking. Additional electrical parameters must be verified against the exact datasheet before use.

🔌 Main Functions

• Detects alternating current flowing through the primary conductor.
• Converts primary current into a proportional secondary signal.
• Sends the signal to compatible measurement, monitoring or protection circuits.
• Provides galvanic isolation between the power circuit and the measurement circuit.

🛠️ Applications

• Electrical panels and current monitoring systems.
• Industrial electronic equipment.
• Measurement and control circuits.
• Electrical consumption monitoring systems.
• Compatible power supplies and electrical conversion equipment.

🧩 Compatibility

The component may be used in equipment designed for a current transformer with a 100/0.2 A ratio and compatible secondary connections.
Before replacement, verify the transformation ratio, permitted secondary burden, operating frequency, insulation and mechanical dimensions. Matching the ratio alone does not guarantee compatibility with every device.

💡 Advantages

• Measures current without inserting the transformer in series with the primary circuit.
• Provides galvanic isolation between the measured circuit and the measurement circuit.
• Compact construction with mounting via a bracket or dedicated housing.
• Secondary connection through Faston terminals.
• Suitable as a replacement part for equipment requiring the same electrical and mechanical specifications.

🛡️ Product Condition

Used product with surface marks and signs of use visible in the photographs. The terminals show signs of oxidation and surface wear.
Operation has not been instrumentally tested. Electrical testing is recommended before installation.

📦 Package Contents

• 1 SIRIO 100/0.2 A current transformer.
  Cables, measuring instruments and other accessories not shown in the photographs are not included.

🟢 Summary

SIRIO current transformer with a nominal ratio of 100 A / 0.2 A, featuring a through-hole and Faston terminals. Replacement component for AC current measurement and monitoring circuits, to be used after verifying compatibility with the specifications of the target equipment.