Current transformer Rittal SV 9677.885 600 A, conductor diameter 2.5–4 mm, black

Rittal SV 9677.885 is a compact current transformer designed for inductive measurement of alternating current flow. With a nominal secondary current rating corresponding to a 600 A primary and a window that accommodates conductors from 2.5 to 4 mm diameter, this black-bodied device is intended for integration into switchgear, control cabinets and protection circuits where space-efficient, reliable current sensing is required.

Advantages

The transformer provides accurate AC current measurement in a compact form factor and is compatible with small-diameter conductors, allowing straightforward installation without additional adaptors. Its robust housing and standardized construction simplify mounting in electrical panels and enable consistent performance for monitoring and protection applications.

Suitable for

• Measuring and monitoring alternating currents in switchgear and distribution panels
• Integration into control cabinets for system diagnostics and metering
• Protection circuits and relay inputs that require a 600 A primary sensing range
• Applications where conductor diameters are between 2.5 mm and 4 mm

When it may not be suitable

This current transformer is intended for inductive AC measurement and is not suitable for direct connection to DC circuits or for primary conductors outside the specified diameter range. It should not be used where the primary current regularly exceeds the rated primary range or where a different turns ratio is required for existing metering equipment.

Key specifications

• Primary current range: nominal rating corresponding to 600 A primary
• Conductor diameter accommodated: 2.5–4 mm
• Application type: inductive AC current measurement
• Physical colour: black
• Typical installation: panel/switchgear mounting for monitoring and protection

How to use

Pass the conductor carrying the AC load through the transformer's window so the conductor serves as the primary. Secure the device within the control cabinet or switchgear according to panel layout and local wiring regulations. Connect the secondary outputs to the measurement device, meter or protection relay following the specified polarity and safety procedures. Verify secondary circuit continuity and insulation before energising the system, and ensure the secondary is never left open-circuited under load.

What to consider before purchase

• Confirm that the primary current range and the transformer's 600 A nominal sensing range match your measurement or protection requirements
• Ensure the conductor diameter is within 2.5–4 mm to fit through the transformer's window
• Verify compatibility of the transformer's secondary ratio with existing meters, relays or monitoring equipment
• Check mounting space and panel layout to allow safe installation and access to secondary connections

Usage recommendations

Install and commission the current transformer in accordance with applicable electrical standards and the installation instructions provided by the system designer. Always short or terminate the secondary before removing power and use appropriate protective devices and wire gauges for the secondary circuit.