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1sna166741r0400 – to-ds-vl
TE Connectivity TO-DS-VL 1SNA166741R0400 is a grey ENTRELEC ESSAILEC open-contact voltage test socket rated at 400 V and 8 A with screw-clamp connections for electrical protection, metering and measurement circuits.
£70.45
Why Choose the TE Connectivity TO-DS-VL ESSAILEC Voltage Test Socket?
The TE Connectivity TO-DS-VL 1SNA166741R0400 is an industrial ESSAILEC voltage test socket with open contacts, designed for measuring, testing and maintaining voltage circuits in electrical protection, metering and instrumentation systems. Part of the established TE Connectivity ENTRELEC ESSAILEC measuring and testing range, it provides a dedicated interface for connecting test equipment while helping minimise disturbance to permanent panel wiring.
The TO-DS-VL is designed for base or half-base mounting and uses reliable screw-clamp connections for field wiring. Its open-contact configuration is specifically suited to applications where the circuit must be opened as part of the testing procedure, providing engineers with a controlled interface for commissioning, diagnostics and scheduled maintenance.
With a 400 V rated voltage, 8 A rated current, grey identification and a product weight of approximately 100 g, the TO-DS-VL is well suited to switchgear, substations, protection panels and industrial metering systems. Compatible ESSAILEC accessories include the CPT-2 lid, CPT-4 cover and FI-2/4-DIA4 universal test plug.
Key Advantages
- Purpose-designed ESSAILEC voltage test socket with open contacts.
- 400 V rated voltage for industrial measurement and protection circuits.
- 8 A rated current for secondary voltage circuit applications.
- Suitable for base and half-base mounting.
- Reliable screw-clamp termination for permanent field wiring.
- Compatible with modular ESSAILEC test plugs, lids and covers.
Key Features
- TE Connectivity / ENTRELEC ESSAILEC series.
- TO-DS-VL voltage test socket.
- Open-contact configuration.
- 400 V rated voltage.
- 8 A rated current.
- Screw-clamp connection technology.
- Base / half-base mounting configuration.
- Grey identification colour.
- Compatible with the FI-2/4-DIA4 universal 2 × 4-pole test plug.
Reliable Voltage Circuit Testing with ESSAILEC
ESSAILEC measuring and testing blocks provide dedicated interfaces for secondary electrical circuits associated with voltage transformers, meters, instrumentation and protection relays. They allow engineers to perform commissioning, measurement, fault finding and maintenance through a structured test connection rather than repeatedly modifying permanent panel wiring.
The TO-DS-VL combines an open-contact arrangement with screw-clamp field connections and modular ESSAILEC accessory compatibility. This makes it a practical choice for installations requiring repeatable access to voltage circuits while maintaining an organised and serviceable electrical panel design.
Typical Applications
- Voltage transformer secondary circuits.
- Protection relay testing and commissioning.
- Electrical metering and energy measurement systems.
- Substation protection and control panels.
- Switchgear and distribution assemblies.
- Industrial instrumentation systems.
- Commissioning and maintenance test interfaces.
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 | TO-DS-VL | |
| Manufacturer part number | 1SNA166741R0400 | |
| Product type | Voltage test socket | |
| Contact configuration | Open contacts | |
| Rated voltage | 400 V | |
| Rated current | 8 A | |
| Impulse withstand voltage | 4 kV | |
| Pollution degree | 3 | |
| Connection technology | Screw clamp | |
| Mounting type | Base / half-base mounting | |
| Colour | Grey | |
| Rigid conductor capacity | 0.2–6 mm² | |
| Flexible conductor capacity | 0.22–4 mm² | |
| Recommended tightening torque | 0.5–0.8 Nm | |
| Working temperature range | -10 to +55 °C | |
| Storage temperature range | -25 to +70 °C | |
| Protection without cover | IP20 | |
| Protection with cover | IP40 | |
| Compatible lid | CPT-2 | |
| Compatible cover | CPT-4 | |
| Compatible universal test plug | FI-2/4-DIA4 | |
| Net weight | approx. 100 g | |
| Pack quantity | 1 |
Frequently Asked Questions
What is the TE Connectivity TO-DS-VL 1SNA166741R0400 used for?
The TO-DS-VL is an ESSAILEC voltage test socket designed to provide controlled test access to voltage measurement, metering and protection circuits.
What contact configuration does the TO-DS-VL use?
The TO-DS-VL uses open contacts, making it suitable for test applications where the voltage circuit needs to be opened during the testing procedure.
What are the electrical ratings of the TO-DS-VL?
The TO-DS-VL is rated at 400 V and 8 A for use in compatible ESSAILEC measurement and testing circuits.
How is the TO-DS-VL connected and mounted?
The socket uses screw-clamp connections and is designed for base or half-base mounting.
Which accessories are compatible with the TO-DS-VL?
Compatible ESSAILEC accessories include the CPT-2 lid, CPT-4 cover and FI-2/4-DIA4 universal 2 × 4-pole test plug, along with selected pre-wired test plugs.
Trusted Connectivity for Voltage Measurement Systems
TE Connectivity’s ENTRELEC ESSAILEC measuring and testing system provides dependable test interfaces for voltage measurement, protection and metering circuits, helping engineers perform commissioning and maintenance efficiently while maintaining organised permanent wiring.
