TE Connectivity TC-E-VA-R1-2.2 1SNA166799R0700 is a coded ESSAILEC voltage test block with make-before-break contacts, flush front-panel mounting and rear screw connections for voltage-transformer secondary, metering and protection circuits.
£118.95
The TE Connectivity TC-E-VA-R1-2.2 1SNA166799R0700 is a specialist ESSAILEC voltage test block designed to provide controlled test access to voltage-transformer secondary circuits used in electrical metering, measurement and protection systems. Part of the established TE Connectivity ENTRELEC ESSAILEC series, it enables engineers to perform testing, monitoring and maintenance without repeatedly disturbing permanent panel wiring.
The TC-E-VA-R1-2.2 is designed for flush front-panel mounting and uses rear screw connections for cable-lug terminations. Its 2.2 coding configuration helps prevent incorrect mating between different ESSAILEC circuits, while mechanical protection against reverse plug insertion further supports dependable test procedures.
The ESSAILEC system uses a make-before-break contact principle to support controlled circuit switching as compatible test plugs are inserted. The 1SNA166799R0700 therefore provides a practical solution for commissioning, voltage measurement, protection-relay testing and maintenance in industrial switchboards, substations and metering panels.
ESSAILEC measuring and testing blocks are designed to simplify operations such as voltage and current measurement, monitoring, signal injection and the servicing or replacement of meters and protection relays connected to transformer and sensor secondary circuits. The TC-E-VA-R1-2.2 provides the fixed voltage-circuit interface required for these professional testing procedures.
By combining a coded plug-and-socket architecture with front-panel accessibility and permanent rear wiring, the system enables fast testing without repeatedly disconnecting field conductors. This makes the 1SNA166799R0700 particularly useful in installations where protection and metering equipment must be commissioned, verified or maintained throughout its service life.
| Manufacturer | TE Connectivity |
|---|---|
| Product family | ENTRELEC ESSAILEC |
| Model | TC-E-VA-R1-2.2 |
| Part number | 1SNA166799R0700 |
| Product type | Voltage test block / test socket |
| Application | Voltage-transformer secondary circuit testing |
| Coding | 2.2 |
| Contact operation | Make-before-break |
| Mounting type | Flush front-panel mounting |
| Connection position | Rear |
| Connection type | Screw connection for cable lugs |
| Maximum connection capacity | up to 10 mm² depending on connection arrangement |
| Protection rating | IP20 socket / IP40 with appropriate cover |
| Compatible system | ESSAILEC measuring and testing blocks |
| Pack quantity | 1 |
| EAN | 3472591667998 |
The 1SNA166799R0700 is an ESSAILEC voltage test block designed to provide controlled test access to voltage-transformer secondary circuits used in metering, measurement and protection systems.
The product is identified as the TC-E-VA-R1-2.2 within the TE Connectivity ENTRELEC ESSAILEC measuring and testing range.
The test block uses 2.2 coding, helping ensure that the appropriate compatible ESSAILEC test plug is connected to the correct electrical circuit.
The test block is designed for flush mounting in the front of an electrical panel, with permanent wiring connected at the rear using screw-secured cable-lug connections.
The socket provides IP20 protection, which can be increased to IP40 when the appropriate protective cover is fitted, while coding and reverse-insertion protection help reduce connection errors.
TE Connectivity ENTRELEC ESSAILEC test blocks provide a proven plug-and-play interface for electrical measurement, metering and protection circuits, supporting efficient commissioning and maintenance while minimising disturbance to permanent secondary-circuit wiring.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...