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1sna166972r0000 – tt4-s-vl-inf
TE Connectivity 1SNA166972R0000 TT4-S-VL-INF is an ESSAILEC 400 V, 8 A voltage transformer test socket with four independent circuits, integrated 4 mm test points, screw-clamp connections and a compact protective cover.
£39.05
Why Choose the TE Connectivity 1SNA166972R0000 TT4-S-VL-INF ESSAILEC Voltage Test Socket?
The TE Connectivity 1SNA166972R0000, also identified as TT4-S-VL-INF, is a specialised ESSAILEC voltage transformer test socket with four independent circuits. Designed for voltage measurement applications, it provides direct access to four separate circuits through integrated 4 mm test sockets, making it a practical solution for testing, monitoring and maintenance of instrument transformer secondary circuits.
The TT4-S-VL-INF uses screw-clamp connections and is intended for base mounting. Unlike coded ESSAILEC sockets, this model does not require coding and is supplied with a compact protective cover. The four integrated test points are colour identified for straightforward circuit recognition: U1 brown, U2 black, U3 red and U4 blue.
Rated at 400 V and 8 A, the 1SNA166972R0000 combines convenient test access with the established ESSAILEC modular architecture. Its four independent voltage circuits make it particularly useful in metering, protection and switchgear applications where technicians need direct access to multiple voltage measurement points without disturbing permanent field wiring.
Key Advantages
- Provides four independent circuits for voltage measurement.
- Integrated 4 mm test sockets allow direct connection of suitable test equipment.
- Colour-coded test points simplify identification of individual voltage circuits.
- Screw-clamp connections provide secure field wiring termination.
- Supplied with a compact protective cover.
- No coding required for this independent-circuit configuration.
- Part of the established TE Connectivity / Entrelec ESSAILEC test block system.
Key Features
- TE Connectivity / Entrelec ESSAILEC voltage transformer range.
- TT4-S-VL-INF manufacturer product designation.
- Four independent voltage circuits.
- Four integrated 4 mm test sockets.
- U1: Brown test socket.
- U2: Black test socket.
- U3: Red test socket.
- U4: Blue test socket.
- Base mounting configuration.
- Screw-clamp connection technology.
- Compact cover and locking capability.
Direct Testing of Four Independent Voltage Circuits
The TT4-S-VL-INF differs from conventional switched ESSAILEC test sockets by providing four independent voltage measurement circuits. Testing can be performed directly through the four built-in 4 mm sockets, allowing suitable measurement equipment to be connected without dismantling the permanent circuit wiring.
The brown, black, red and blue identification of the U1, U2, U3 and U4 test points helps technicians distinguish circuits quickly during commissioning and maintenance. Combined with its screw-clamp field connections and compact protective cover, the TT4-S-VL-INF provides an organised interface for voltage measurement in switchgear, metering panels and protection systems.
Typical Applications
- Voltage transformer secondary circuit measurement.
- Electrical metering and monitoring systems.
- Protection relay testing and commissioning.
- Switchgear and distribution panels.
- Substation protection and control equipment.
- Industrial voltage measurement and maintenance systems.
Technical Specifications
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| Terminal Type | Disconnect / Test | |
|---|---|---|
| Connection | Screw clamp | |
| Product Series | TE Essailec | |
| Colour | Grey | |
| Manufacturer | TE Connectivity / Entrelec | |
| Series | ESSAILEC | |
| Model | TT4-S-VL-INF | |
| Manufacturer part number | 1SNA166972R0000 | |
| Product type | Voltage transformer test socket | |
| Circuit configuration | 4 independent circuits | |
| Test connection | 4 integrated 4 mm test sockets | |
| Connection technology | Screw clamp | |
| Mounting | Base mounting | |
| Coding | No coding required | |
| Cover | Compact cover included | |
| Rated voltage | 400 V | |
| Rated current | 8 A | |
| Rated impulse voltage | 4 kV | |
| Conductor capacity, rigid | 0.2–6 mm² | |
| Conductor capacity, flexible | 0.22–4 mm² | |
| Stripping length | 9.5 mm | |
| Tightening torque | 0.5–0.8 Nm | |
| Housing material | Polycarbonate | |
| Conductive parts | Silver plated | |
| Pollution degree | 3 | |
| Protection without cover | IP20 | |
| Protection with cover | IP40 | |
| Working temperature | -10 to +55 °C | |
| Storage temperature | -25 to +70 °C | |
| Colour | Grey | |
| Weight | approx. 114 g | |
| Pack quantity | 40 | |
| EAN | 3472591669725 |
Frequently Asked Questions
What is the TE Connectivity 1SNA166972R0000 used for?
The 1SNA166972R0000 is an ESSAILEC voltage transformer test socket providing four independent circuits for voltage measurement, testing, monitoring and maintenance applications.
How many circuits does the TT4-S-VL-INF provide?
The TT4-S-VL-INF provides four independent voltage circuits, each accessible through its own integrated 4 mm test socket.
How are the four test sockets identified?
The four test sockets are colour identified as U1 brown, U2 black, U3 red and U4 blue, helping technicians distinguish the individual measurement circuits.
What are the electrical ratings of the TT4-S-VL-INF?
The TT4-S-VL-INF has a rated voltage of 400 V, a rated current of 8 A and a rated impulse voltage of 4 kV.
Does the TT4-S-VL-INF include a protective cover?
Yes. The TT4-S-VL-INF is supplied with a compact protective cover and supports locking to help control access to the test interface.
Trusted for Independent Voltage Measurement
TE Connectivity / Entrelec ESSAILEC test blocks provide specialised connection solutions for voltage transformer, metering and protection circuits where direct test access, clear circuit identification and efficient electrical maintenance are essential.
