Schneider Electric Square D S33595 Full-Function Trip Unit Test Kit

Schneider Electric Square D S33595 Full-Function Test Kit for Trip Unit Secondary Injection Testing

The Schneider Electric Square D S33595 Full-Function Test Kit is a portable instrument used to test compatible circuit breaker trip units using secondary injection methods. The kit integrates an interface screen and control keys within a hard carrying case for field or shop testing setups.

Kit Components and Operator Interfaces

• Interface screen and control keys for selecting test functions and navigating test steps
• Power switch with line fuse holder and voltage selector for nominal 115–230 Vac operation
• Trip unit test cable 10-pin port for connecting the provided trip unit test cables
• Modbus serial connection for compatible serial connectivity needs
• Included 2-pin test cable for STR trip units and 7-pin test cable for MICROLOGIC trip units

Signal Generation and Measurement Architecture

The S33595 supplies controlled fault-signal outputs and measures trip timing during test execution. Trip time measurement supports a range of 0 to 3000 seconds with 1 ms resolution and ±5 ms accuracy. The kit provides a voltage-source fault signal at a nominal 60 Hz with an amplitude range of 0.031 to 21.5 Vrms, and a current-source fault signal with an amplitude range of 0.020 to 2.3 A dc, each specified at ±3% accuracy. A 24 Vdc output is provided at a nominal 24 Vdc with 22.8–25.2 Vdc tolerance and up to 100 mA maximum output current. Operating frequency support includes 50 Hz and 60 Hz. The unit is specified for Installation Category II and a maximum power rating of 60 W.

Supported Test Contexts

• Secondary injection testing workflows for compatible STR, ET, and MICROLOGIC trip unit families
• Trip timing measurement and recording during injected fault-signal test sequences
• Bench or field test setups where a portable, cabled connection to the trip unit test port is required