Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
1sna166885r1600 – to-i-va-1
TE Connectivity TO-I-VA-1 1SNA166885R1600 is a grey ESSAILEC voltage transformer test socket with open contacts, inverted mounting and rear screw connections for cable lugs, designed for professional electrical testing and measurement circuits.
£88.10
Why Choose the TE Connectivity TO-I-VA-1 ESSAILEC Voltage Test Socket?
The TE Connectivity TO-I-VA-1 1SNA166885R1600 is an ESSAILEC voltage transformer test socket with open contacts, designed for testing and measurement on voltage-transformer secondary circuits. Part of the TE Connectivity ENTRELEC ESSAILEC range, it provides a dedicated connection interface for professional metering, protection and electrical measurement installations.
The TO-I-VA-1 features an open-contact configuration with inverted mounting and rear screw connections for cable lugs. This arrangement is particularly useful where the test interface must be presented at the front of a panel while permanent wiring is securely terminated from the rear, helping create an organised and serviceable installation.
With a compact 44 mm width and grey housing, the TO-I-VA-1 integrates into compatible ESSAILEC assemblies used throughout switchboards, metering panels and protection systems. Its purpose-designed construction supports efficient testing and maintenance while reducing the need to disturb permanent voltage-transformer wiring.
Key Advantages
- Purpose-designed ESSAILEC socket for voltage-transformer testing and measurement.
- Open-contact configuration provides a defined test interface for secondary voltage circuits.
- Inverted mounting supports specialised panel layouts.
- Rear screw termination for cable lugs keeps permanent wiring behind the test interface.
- Compact 44 mm width helps optimise panel space.
- Part of the coordinated TE Connectivity ENTRELEC ESSAILEC measuring and testing system.
Key Features
- TE Connectivity ENTRELEC TO-I-VA-1 test socket.
- Part of the ESSAILEC measuring and testing range.
- Designed for voltage-transformer secondary circuits.
- Open contacts.
- Inverted mounting configuration.
- Rear screw connection arrangement.
- Designed for termination using cable lugs.
- 44 mm overall width.
- Grey housing.
- Suitable for professional switchgear, metering and protection installations.
Dedicated Access for Voltage Transformer Testing
Voltage-transformer secondary circuits are widely used to supply metering, monitoring and protection equipment with representative system voltages. Incorporating a dedicated ESSAILEC test interface allows technicians to access these circuits for measurement, commissioning and maintenance through a controlled connection point instead of repeatedly altering permanent field wiring.
The TO-I-VA-1 combines open contacts with inverted mounting and rear cable-lug terminations, making it particularly suitable for panel designs where front test accessibility and rear permanent wiring are required. This arrangement supports orderly switchboard construction and efficient servicing of electrical measurement and protection systems.
Typical Applications
- Voltage-transformer secondary circuits.
- Electrical energy metering systems.
- Protection relay testing and commissioning.
- Voltage measurement and monitoring circuits.
- Industrial switchboards and protection panels.
- Power distribution and substation installations.
Technical Specifications
Tick the specs you need, then view products that match.
| Terminal Type | Disconnect / Test | |
|---|---|---|
| Product Series | TE Essailec | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / ENTRELEC | |
| Series | ESSAILEC | |
| Model | TO-I-VA-1 | |
| Part number | 1SNA166885R1600 | |
| Product type | Voltage transformer test socket / fixed terminal block | |
| Application | Voltage-transformer testing and measurement | |
| Contact configuration | Open contacts | |
| Mounting configuration | Inverted mounting | |
| Termination | Rear screw connection for cable lugs | |
| Width | 44 mm | |
| Colour | Grey | |
| Pack quantity | 1 | |
| EAN / GTIN | 3472591668858 |
Frequently Asked Questions
What is the TE Connectivity TO-I-VA-1 1SNA166885R1600 used for?
The TO-I-VA-1 is an ESSAILEC voltage test socket designed to provide a dedicated interface for testing and measurement on voltage-transformer secondary circuits.
What contact configuration does the TO-I-VA-1 use?
The TO-I-VA-1 uses an open-contact configuration suitable for dedicated voltage-transformer testing and measurement arrangements.
How is the TO-I-VA-1 mounted?
The TO-I-VA-1 is designed for inverted mounting, allowing it to support specialised panel and switchboard test-interface layouts.
How are conductors connected to TE Connectivity 1SNA166885R1600?
The TO-I-VA-1 uses rear screw connections intended for cable-lug terminations, keeping permanent circuit wiring behind the accessible test interface.
What is the width and identification code of the TO-I-VA-1?
The TO-I-VA-1 has a width of approximately 44 mm. Its manufacturer part number is 1SNA166885R1600 and its EAN / GTIN is 3472591668858.
Trusted ESSAILEC Test Connection Technology
TE Connectivity ENTRELEC ESSAILEC test blocks provide dedicated interfaces for voltage and current measurement circuits, helping engineers perform testing, commissioning and maintenance while maintaining an organised permanent wiring architecture.
