TE Connectivity CC-E-VA-R1-6.6 1SNA166798R0600 is a 15 A ENTRELEC ESSAILEC current transformer test block with make-before-break contacts, 6.6 coding and rear ring-tongue screw connections for protection and metering circuits.
£166.38
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.
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.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | CC-E-VA-R1-6.6 |
| Manufacturer part number | 1SNA166798R0600 |
| Product type | Current transformer test block / current socket |
| Application | Current transformer secondary testing and measurement |
| Contact principle | Make-before-break |
| Rated current | 15 A |
| Short-time withstand current | 200 A / 1 s |
| Impulse withstand voltage | 4000 V |
| Pollution degree | 3 |
| Connection type | Rear screw connection for ring-tongue terminals |
| Conductor capacity | 0.34–10 mm² |
| Mounting | Flush front-panel mounting |
| Coding | 6.6 |
| Colour | Green |
| Protection rating | IP20 at main terminals |
| Insulation material | Polycarbonate |
| Width | 50 mm |
| Height | 74 mm |
| Depth | 57 mm |
| Net weight | approx. 180 g |
| EAN | 3472591667981 |
| Customs tariff number | 85369010 |
| Pack quantity | 1 |
The 1SNA166798R0600 is an ESSAILEC current transformer test block used for testing, measurement and maintenance of secondary current circuits associated with meters and protection relays.
The manufacturer model designation is CC-E-VA-R1-6.6.
The make-before-break contact sequence establishes the required current-transformer short-circuit path before the measurement circuit is disconnected, supporting safer and faster testing without manually operating separate shorting links.
The test block has a rated current of 15 A and a short-time withstand rating of 200 A for 1 s.
It is designed for flush front-panel mounting and uses rear screw connections for ring-tongue terminals, accepting conductors up to 10 mm².
TE Connectivity’s ENTRELEC ESSAILEC system provides purpose-designed test interfaces for current transformer, metering and protection circuits, combining coded connectivity with make-before-break operation to support efficient commissioning and maintenance.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...