1sna166937r1100 – voltage test plug 2 x 4 pole

Why Choose the TE Connectivity FIT-2/4-2 1SNA166937R1100 ESSAILEC Voltage Test Plug?

The TE Connectivity FIT-2/4-2 1SNA166937R1100 is a professional 2 × 4-pole ESSAILEC voltage test plug designed for testing, measurement and maintenance of secondary voltage circuits. Part of the established TE Connectivity ENTRELEC ESSAILEC range, it provides a convenient plug-in interface between compatible ESSAILEC sockets and external test equipment.

The FIT-2/4-2 configuration provides a 2 × 4-pole interface, allowing testing across up to four voltage circuits within the ESSAILEC system. The plug is supplied with 8 locking pins and 2 COP-F-1 coding pins, while the required BRE contact pins are selected and ordered separately to suit the test-lead wiring configuration.

With compact dimensions of 44 × 63 × 122 mm and a net weight of approximately 105 g, the 1SNA166937R1100 provides a robust test interface for switchboards, protection panels, substations and metering installations. The associated ESSAILEC voltage range is rated at 400 V, supporting professional measurement and maintenance procedures in industrial secondary circuits.

Key Advantages

• 2 × 4-pole test plug enables testing across multiple ESSAILEC voltage circuits.
• Designed specifically for secondary voltage measurement and testing.
• Supplied with 8 locking pins for secure engagement with compatible sockets.
• Includes 2 COP-F-1 coding pins to support correct plug-to-socket matching.
• BRE contact pins can be selected separately to suit the required test wiring.
• Plug-and-play ESSAILEC architecture reduces repeated disturbance of permanent panel wiring.
• Suitable for commissioning, calibration, monitoring and protection-relay maintenance.

Key Features

• TE Connectivity ENTRELEC ESSAILEC series.
• FIT-2/4-2 voltage test plug configuration.
• 2 × 4-pole interface.
• Supports testing of up to 4 voltage circuits in compatible ESSAILEC arrangements.
• Supplied with 8 locking pins.
• Supplied with 2 COP-F-1 coding pins.
• BRE contact pins ordered separately.
• Designed for connection between ESSAILEC sockets and external test equipment.
• Suitable for industrial metering, measurement and protection systems.

Reliable Multi-Circuit Voltage Testing

The ESSAILEC measuring and testing system is designed to simplify operations including voltage measurement, monitoring, calibration and the servicing or replacement of meters and protection relays installed in secondary transformer and sensor circuits. The FIT-2/4-2 provides the removable test interface, connecting compatible fixed sockets to the engineer's test equipment when measurements or maintenance are required.

Its 2 × 4-pole architecture allows several circuits to be accessed through one compact plug, while locking and coding features support controlled connection to the appropriate ESSAILEC socket. This arrangement makes the 1SNA166937R1100 particularly useful in installations requiring regular commissioning and diagnostic access without repeatedly altering permanent field wiring.

Typical Applications

• Voltage-transformer secondary circuit testing.
• Electrical voltage measurement and monitoring.
• Protection relay testing and commissioning.
• Meter testing, calibration and maintenance.
• Industrial switchboards and control panels.
• Substation protection and instrumentation systems.
• Power distribution measurement installations.