TE Connectivity CC-I-VA-2 1SNA166941R2500 is a 15 A, 400 V ENTRELEC ESSAILEC reverse-mounting current test socket with make-before-break short-circuiting contacts and ring-tongue termination for current-transformer measurement and protection circuits.
£183.69
The TE Connectivity CC-I-VA-2 1SNA166941R2500 is a specialist ENTRELEC ESSAILEC current test socket designed for current-transformer secondary circuits. It uses short-circuiting contacts with a make-before-break operating principle, providing a controlled interface for measurement, calibration and distribution applications in protection and metering systems.
When a compatible test plug is inserted, the ESSAILEC contact mechanism automatically short-circuits the relevant current circuit before the test connection is established. When the plug is removed, the normal circuit closes automatically. This operating sequence is particularly important in current-transformer applications, where controlled handling of the CT secondary circuit is essential during testing and maintenance.
The CC-I-VA-2 is configured for reverse mounting and uses ring-tongue connections for secure permanent wiring. It is rated at 15 A and 400 V, supports conductors from 0.34–10 mm², and uses the ESSAILEC convention of green identification for current circuits.
Current-transformer secondary circuits require particular care during testing because an operating CT secondary should not simply be left open-circuit. The CC-I-VA-2 addresses this requirement through its make-before-break short-circuiting mechanism: insertion of the appropriate test plug automatically establishes the short circuit before the normal connection is interrupted.
When testing is complete and the plug is withdrawn, the normal circuit connection is automatically restored. Combined with reverse mounting and robust ring-tongue terminations, this operating principle makes the CC-I-VA-2 a practical fixed interface for repeatable measurement, calibration, commissioning and maintenance procedures in current-transformer protection and metering systems.
| Manufacturer | TE Connectivity |
|---|---|
| Brand / range | ENTRELEC |
| Series | ESSAILEC |
| Model | CC-I-VA-2 |
| Manufacturer part number | 1SNA166941R2500 |
| Product type | Current test socket / fixed terminal block |
| Function | Current-transformer applications |
| Contact principle | Short-circuiting, make-before-break |
| Rated current | 15 A |
| Rated voltage | 400 V |
| Rated impulse withstand voltage | 4000 V |
| Rated short-time withstand current | 200 A for 1 s |
| Connection type | Ring-tongue |
| Connecting capacity | 0.34–10 mm² |
| Mounting type | Reverse mounting |
| Colour | Green |
| Product width | 44 mm |
| Product height | 63 mm |
| Product depth | 80 mm |
| Product weight | 210 g |
| Pack quantity | 1 |
| EAN | 3472591669411 |
The CC-I-VA-2 is an ENTRELEC ESSAILEC current test socket designed for current-transformer secondary circuits, with short-circuiting make-before-break contacts for measurement, calibration and distribution applications.
When the appropriate test plug is inserted, the circuit is automatically short-circuited before the normal connection is interrupted. When the plug is removed, the normal circuit closes automatically, providing controlled handling of the CT secondary circuit.
The CC-I-VA-2 has a rated current of 15 A, rated voltage of 400 V, impulse withstand voltage of 4000 V and rated short-time withstand current of 200 A for 1 s.
The CC-I-VA-2 is designed for reverse mounting and uses ring-tongue connections. Its main-circuit connection accommodates conductors from approximately 0.34–10 mm².
Within the ESSAILEC system, green coding is conventionally used to identify current circuits. This helps distinguish current-transformer test connections from other circuit functions in complex protection and measurement installations.
TE Connectivity ENTRELEC ESSAILEC current test sockets provide purpose-designed make-before-break interfaces for measurement, calibration and protection applications where controlled access to current-transformer secondary circuits is required.
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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...
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...