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1sna166744r0700 – to-d-va
TE Connectivity TO-D-VA 1SNA166744R0700 is an 8 A, 400 V ENTRELEC ESSAILEC voltage test socket with open contacts, ring-tongue termination and half-base mounting for voltage-transformer secondary circuits.
£76.71
Why Choose the TE Connectivity TO-D-VA ESSAILEC Voltage Test Socket?
The TE Connectivity TO-D-VA 1SNA166744R0700 is a voltage test socket with open contacts from the established ENTRELEC ESSAILEC test block range. Designed for voltage-transformer secondary circuits, it provides a dedicated interface for testing, measurement, monitoring and maintenance in switchgear, metering and electrical protection installations.
The TO-D-VA uses a half-base mounting arrangement with ring-tongue connections, providing a secure method of terminating permanent panel wiring. Its open-contact configuration is specifically designed for voltage applications, while the grey housing follows the ESSAILEC identification scheme for this type of test circuit.
Rated at 8 A and 400 V, the TO-D-VA is designed for professional test systems where controlled access to secondary voltage circuits is required. It weighs approximately 139 g and can be used with compatible ESSAILEC accessories and test plugs, including the CPT-2 cover and FI-2/4-DIA4 universal test plug.
Key Advantages
- Dedicated ESSAILEC voltage test socket for transformer secondary circuits.
- Open-contact configuration designed for voltage testing applications.
- Rated for 8 A at 400 V.
- Ring-tongue termination provides secure permanent wiring connections.
- Half-base mounting supports integration into professional electrical panels and test assemblies.
- Compatible with established ESSAILEC covers, universal plugs and pre-wired test plugs.
Key Features
- TE Connectivity ENTRELEC ESSAILEC range.
- TO-D-VA voltage test socket.
- Open contacts.
- Half-base mounting.
- Ring-tongue connection technology.
- Grey housing for voltage-circuit identification.
- Suitable for secondary voltage-transformer circuits.
- Compatible with CPT-2 cover.
- Compatible with FI-2/4-DIA4 universal test plug.
- Compatible with selected COR-T pre-wired ESSAILEC plugs.
Reliable Access to Voltage Transformer Secondary Circuits
ESSAILEC test blocks are designed to simplify electrical testing operations including voltage measurement, monitoring, signal injection and the maintenance or replacement of meters and protection relays. The plug-and-socket architecture gives engineers a defined test interface while helping avoid unnecessary alteration of permanently installed secondary wiring.
The TO-D-VA combines open contacts, ring-tongue termination and half-base mounting in a configuration intended for voltage applications. Used with the appropriate ESSAILEC plug and accessories, it provides a repeatable connection point for commissioning, routine testing and maintenance in utility and industrial electrical systems.
Typical Applications
- Voltage-transformer secondary circuits.
- Electrical metering and measurement panels.
- Protection relay testing and commissioning.
- Substation control and protection systems.
- Industrial switchgear assemblies.
- Power distribution and monitoring equipment.
- Meter and protection-relay maintenance systems.
Technical Specifications
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| Terminal Type | Disconnect / Test | |
|---|---|---|
| Product Series | TE Essailec | |
| Colour | Grey | |
| Manufacturer | TE Connectivity | |
| Brand / range | ENTRELEC | |
| Series | ESSAILEC | |
| Model | TO-D-VA | |
| Manufacturer part number | 1SNA166744R0700 | |
| Product type | Voltage test socket / fixed terminal block | |
| Application | Voltage-transformer secondary circuits | |
| Contact configuration | Open contacts | |
| Rated current | 8 A | |
| Rated voltage | 400 V | |
| Connection type | Ring-tongue | |
| Mounting type | Half-base mounting | |
| Colour | Grey | |
| Short-circuit withstand | 25 A / 5 s to 800 A / 25 ms | |
| Dielectric withstand voltage | 4000 V | |
| Pollution degree | 3 | |
| Working temperature range | -10–55 °C | |
| Storage temperature range | -25–70 °C | |
| Protection rating | IP20; IP40 with compatible cover | |
| Weight | approx. 139 g | |
| Compatible cover | CPT-2 | |
| Compatible universal plug | FI-2/4-DIA4 | |
| Pack quantity | 1 | |
| EAN | 3472591667448 |
Frequently Asked Questions
What is the TE Connectivity TO-D-VA 1SNA166744R0700?
The TO-D-VA is an ENTRELEC ESSAILEC voltage test socket with open contacts, designed for testing and measurement applications in voltage-transformer secondary circuits.
What are the electrical ratings of the TO-D-VA?
The TO-D-VA has a rated current of 8 A and a rated voltage of 400 V.
What connection type does the TO-D-VA use?
The TO-D-VA uses ring-tongue connections for secure termination of the permanent wiring behind the ESSAILEC test interface.
How is the TO-D-VA mounted?
The TO-D-VA is designed for half-base mounting within compatible ESSAILEC test-block installations.
Which ESSAILEC accessories are compatible with the TO-D-VA?
The TO-D-VA is compatible with the CPT-2 cover and FI-2/4-DIA4 universal test plug, as well as selected COR-T pre-wired ESSAILEC plugs for voltage-transformer applications.
Trusted for Electrical Testing and Protection Systems
TE Connectivity ENTRELEC ESSAILEC test blocks provide a modular plug-and-play connection platform for voltage measurement, monitoring, commissioning and protection applications where controlled and repeatable access to transformer secondary circuits is required.
