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1sna166941r2500 – cc-i-va-2 essailec socket
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.
£119.40
Why Choose the TE Connectivity CC-I-VA-2 ESSAILEC Current Test Socket?
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.
Key Advantages
- Make-before-break contact principle automatically short-circuits the CT secondary circuit during plug insertion.
- Designed specifically for current-transformer measurement, calibration and distribution applications.
- 15 A, 400 V electrical rating for professional secondary-circuit installations.
- Reverse-mounting configuration provides an installation option for specialised panel layouts.
- Ring-tongue termination provides secure connection of permanent circuit wiring.
- Green identification follows the ESSAILEC convention for current circuits.
Key Features
- TE Connectivity ENTRELEC ESSAILEC range.
- CC-I-VA-2 current test socket.
- Designed for current-transformer applications.
- Short-circuiting contact arrangement.
- Make-before-break operation.
- Automatic short-circuiting during compatible plug insertion.
- Automatic circuit closure when the plug is removed.
- Reverse mounting.
- Ring-tongue connection technology.
- Green identification for current circuits.
- Suitable for measurement, calibration and current distribution systems.
Reliable Current-Transformer Testing with Make-Before-Break Contacts
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.
Typical Applications
- Current-transformer secondary circuits.
- CT measurement and calibration systems.
- Protection relay testing and commissioning.
- Electrical metering panels.
- Substation protection and control equipment.
- Industrial and utility switchgear.
- Current measurement and distribution circuits.
- Routine maintenance and diagnostic test systems.
Technical Specifications
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| Terminal Type | Disconnect / Test | |
|---|---|---|
| Product Series | TE Essailec | |
| Colour | Green | |
| 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 |
Frequently Asked Questions
What is the TE Connectivity CC-I-VA-2 1SNA166941R2500?
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.
How does the CC-I-VA-2 make-before-break mechanism work?
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.
What are the electrical ratings of the CC-I-VA-2?
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.
How is the CC-I-VA-2 mounted and connected?
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.
Why is the CC-I-VA-2 green?
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.
Trusted for Current-Transformer Testing and Protection Systems
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.
