The GE EntelliGuard Digital Test Kit (GTUTK20) is a specialized, portable diagnostic tool designed for testing and verifying the operational integrity of GE EntelliGuard® G and EntelliGuard® TU trip units. It allows maintenance personnel to simulate fault conditions and verify that the trip unit’s logic, sensors, and mechanical tripping mechanisms are functioning correctly without needing to energize the primary power circuit.
Product Specifications
| Feature | Details |
| Model Number | GTUTK20 |
| Compatibility | GE EntelliGuard G and TU Trip Units |
| Function | Functional testing, trip testing, and relay verification |
| Interface | USB connectivity to PC (running EntelliGuard software) |
| Power Source | Internal rechargeable battery or external AC power |
| Weight | Approx. 4 kg |
| Country of Origin | USA |
Application Fields
The GTUTK20 is an essential tool for electrical safety and reliability programs:
- Preventive Maintenance: Routine testing of circuit breaker trip units to ensure compliance with NFPA 70B and other safety standards.
- Commissioning: Verifying the calibration and trip settings of new or refurbished circuit breakers before final installation.
- Troubleshooting: Identifying faulty trip units or sensor inputs in an existing power distribution system.
- Safety Certification: Providing documented test results to confirm that protective relaying is operating within the manufacturer’s specified curves.
Product Usage Instructions
- Setup: Connect the GTUTK20 to the EntelliGuard trip unit using the provided interface cables.
- Software Connection: Launch the GE EntelliGuard software on your PC and connect the test kit via USB. The software will automatically detect the trip unit.
- Primary Test: Perform a “Primary Trip Test” to ensure the trip unit can successfully trigger the breaker’s actuator. Note: Ensure the circuit breaker is in the “Test” or “Disconnected” position before initiating a mechanical trip.
- Relay Verification: Use the software to inject simulated current signals into the trip unit to verify the timing of the Long-time, Short-time, and Instantaneous protection curves against the configured settings.
- Documentation: Save the test results generated by the software as a digital record for your maintenance logbooks.
Frequently Asked Questions
Q: Does the GTUTK20 test the primary power path?
A: No. The test kit only tests the “intelligence” (trip unit) and the mechanical actuator of the breaker. It does not test the primary contacts or the ability of the breaker to interrupt high fault currents.
Q: Can I use this for non-GE circuit breakers?
A: No, the GTUTK20 is proprietary hardware designed specifically for the communication protocols and pinouts of GE EntelliGuard series trip units.
Q: What should I do if the test fails?
A: A test failure indicates that either the trip unit is defective, the sensor wiring is damaged, or the mechanical actuator (flux shifter) inside the breaker is seized. Inspect the wiring first; if wiring is sound, the trip unit or the actuator likely requires replacement.
Q: How often should I perform these tests?
A: Industry standards (like NFPA 70B) generally recommend testing critical protective devices every 3 to 5 years, or immediately following any major electrical fault incident.
