TE Connectivity / ENTRELEC TO-I-VA-2 1SNA166945R2100 is a grey ESSAILEC open-contact reverse-mounting voltage test socket with ring-tongue connections for voltage transformer testing and measurement circuits.
£118.02
The TE Connectivity / ENTRELEC TO-I-VA-2 1SNA166945R2100 is an ESSAILEC voltage test socket designed for testing and measurement circuits associated with voltage transformers. Part of the established ENTRELEC ESSAILEC test block range, this socket provides a dedicated interface for safe and organised electrical testing in protection, metering and power distribution installations.
The TO-I-VA-2 features an open-contact configuration and reverse mounting, making it suitable for installations requiring rear-connected test circuitry. Its ring-tongue termination arrangement provides a robust connection method for conductors terminated with suitable cable lugs, while the grey housing provides clear identification within an ESSAILEC assembly.
Designed specifically for voltage transformer applications, the TO-I-VA-2 supports compatible ESSAILEC test plugs including the reverse-mounting FIT-2/4-I. Its industrial construction, dedicated test-block architecture and compact format make it suitable for switchboards, protection panels, metering systems and other electrical installations where dependable access to voltage circuits is required.
ESSAILEC test blocks provide a structured connection interface between electrical measurement circuits and test equipment. In voltage transformer applications, this arrangement helps technicians carry out commissioning, diagnostic and maintenance procedures through a dedicated test interface rather than relying on temporary or improvised circuit connections.
The TO-I-VA-2 combines open contacts with a reverse-mounting format and ring-tongue connections. When integrated with compatible ESSAILEC components such as the FIT-2/4-I plug, it provides a practical test interface for voltage transformer secondary circuits used in protection, metering and electrical monitoring systems.
| Manufacturer | TE Connectivity / ENTRELEC |
|---|---|
| Series | ESSAILEC |
| Model | TO-I-VA-2 |
| Manufacturer part number | 1SNA166945R2100 |
| Product type | Voltage test socket / measuring and testing block |
| Application | Voltage transformer testing and measurement |
| Contact configuration | Open contacts |
| Mounting arrangement | Reverse mounting |
| Connection type | Ring-tongue |
| Colour | Grey |
| Compatible test plug | FIT-2/4-I |
| Compatible plug part number | 1SNA166672R0700 |
| Net height | 115.7 mm |
| Net width | 44 mm |
| Net depth | 63 mm |
| Net weight | 190 g |
| Pack quantity | 1 |
| EAN | 3472591669459 |
The TO-I-VA-2 is an ESSAILEC voltage test socket designed to provide a test and measurement interface for voltage transformer circuits in protection, metering and electrical distribution systems.
The TO-I-VA-2 has an open-contact configuration designed for ESSAILEC voltage testing applications.
The 1SNA166945R2100 is designed for reverse mounting, providing a suitable configuration for rear-connected test circuits within compatible panels and electrical assemblies.
The socket uses a ring-tongue termination arrangement, allowing appropriately terminated conductors to be securely connected to the test socket.
The TO-I-VA-2 is designed for use with the FIT-2/4-I reverse-mounting plug, part number 1SNA166672R0700.
It is typically incorporated into switchboards, protection panels, metering systems and other industrial or utility electrical assemblies requiring a dedicated test interface for voltage transformer circuits.
TE Connectivity / ENTRELEC ESSAILEC test blocks provide dedicated interfaces for testing and measurement circuits, supporting reliable commissioning, maintenance and electrical measurement in industrial power, protection and metering installations.
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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...