1sna166798r0600 – essailec current test block

Why Choose the TE Connectivity CC-E-VA-R1-6.6 ESSAILEC Current Test Block?

The TE Connectivity CC-E-VA-R1-6.6 1SNA166798R0600 is an industrial ESSAILEC current transformer test block designed for safe testing, measurement and maintenance of secondary current circuits. Part of the established TE Connectivity / ENTRELEC ESSAILEC measuring and testing range, it provides a dedicated interface for current transformers, meters and protection relays in switchgear, substations and electrical protection systems.

This version is designed for flush front-panel mounting and features rear screw connections for ring-tongue terminals. Its ESSAILEC make-before-break contact principle automatically provides the required current-transformer short-circuiting sequence during connection of a compatible test plug, allowing current circuit testing without manually operating separate shorting links.

The CC-E-VA-R1-6.6 is rated at 15 A and provides a short-time withstand current of 200 A for 1 s. It incorporates 6.6 coding to help prevent incorrect plug insertion, while its green polycarbonate housing, compact 50 × 74 × 57 mm dimensions and robust electrical characteristics make it suitable for demanding protection and metering installations.

Key Advantages

• Purpose-designed ESSAILEC current transformer test block.
• Make-before-break contact principle automatically supports CT short-circuiting during testing.
• 15 A rated current for secondary current circuits.
• 200 A for 1 s short-time withstand current.
• Flush front-panel mounting for clean integration into protection and metering panels.
• Rear screw connection accepts ring-tongue terminals.
• 6.6 coding helps prevent incorrect plug and circuit connections.

Key Features

• TE Connectivity / ENTRELEC ESSAILEC series.
• CC-E-VA-R1-6.6 current socket configuration.
• Designed for current transformer secondary circuits.
• Make-before-break contact arrangement.
• Rear screw / ring-tongue connection.
• 6.6 coding configuration.
• 4 kV impulse withstand voltage.
• IP20 protection at the main terminals.
• Durable polycarbonate insulation.

Safe Current Transformer Testing with ESSAILEC

Current transformer secondary circuits require controlled handling during testing because an energised CT secondary should not be left open-circuit. ESSAILEC current test blocks use a make-before-break contact principle that establishes the appropriate short-circuit path before the measurement circuit is disconnected, simplifying test procedures and reducing the need for manually operated shorting components.

The CC-E-VA-R1-6.6 combines this operating principle with coded plug compatibility and robust rear ring-tongue wiring. It provides a repeatable test interface for measurement, injection, commissioning and maintenance of meters and protection relays while helping preserve organised permanent panel wiring.

Typical Applications

• Current transformer secondary circuits.
• Protection relay testing and commissioning.
• Electrical metering and energy measurement systems.
• Substation protection and control panels.
• Switchgear and distribution assemblies.
• Industrial instrumentation systems.
• Meter and protection relay replacement or maintenance.