1sna166550r0100 – voltage test plug 2 x 4 pole

Why Choose the TE Connectivity 1SNA166550R0100 FIT-2/4-1 Voltage Test Plug?

The TE Connectivity 1SNA166550R0100, manufacturer designation FIT-2/4-1, is a grey 2 × 4-pole voltage test plug from the ENTRELEC ESSAILEC test block range. Designed for voltage transformer secondary circuits and electrical measurement systems, it provides a removable test interface for compatible ESSAILEC sockets.

The FIT-2/4-1 incorporates a short cover, 2 COP-FI-1 coding pins and 8 locking pins. Its 2 × 4-pole configuration allows testing across multiple voltage circuits while the coding arrangement helps prevent incorrect connection to incompatible ESSAILEC socket configurations.

The plug measures approximately 44 × 63 × 115 mm and weighs 91 g. Contact pins from the BRE-T series are ordered separately, allowing the appropriate contact pin to be selected for the conductor requirements of the application.

Key Advantages

• 2 × 4-pole configuration for multi-circuit voltage testing.
• Purpose-designed for the TE Connectivity ENTRELEC ESSAILEC test system.
• Supplied with 2 COP-FI-1 coding pins to support correct plug/socket matching.
• Includes 8 locking pins for the plug assembly.
• Short-cover design provides a compact test connection solution.
• Accepts separately ordered BRE-T contact pins to suit the required conductor size.

Key Features

• TE Connectivity ENTRELEC FIT-2/4-1 voltage test plug.
• Part of the ESSAILEC test block range.
• 2 × 4 poles.
• Grey colour.
• Short cover configuration.
• Supplied with 2 coding pins.
• Supplied with 8 locking pins.
• Uses separately ordered BRE-T contact pins.
• Designed for voltage measurement and testing applications.
• Suitable for coordinated ESSAILEC plug-and-socket test assemblies.

Reliable Voltage Circuit Testing with ESSAILEC

The ESSAILEC system provides a coordinated method for testing secondary electrical circuits without repeatedly disturbing permanent field wiring. The FIT-2/4-1 is specifically configured as a 2 × 4-pole plug for voltage applications, making it suitable for measurement, calibration, monitoring and protection-system maintenance.

Its 2 coding pins and 8 locking pins form part of the ESSAILEC connection concept, helping establish the intended plug/socket configuration. The separately ordered BRE-T contacts also allow the plug to be equipped with contact pins selected for the required conductor cross-section.

Typical Applications

• Voltage transformer secondary circuit testing.
• Electrical voltage measurement circuits.
• Protection relay testing and maintenance.
• Electricity meter testing and servicing.
• Calibration and measurement systems.
• Utility and substation protection panels.
• Industrial switchgear test circuits.
• ESSAILEC plug-and-socket test installations.