Kingsine Electric Automation Co.,Ltd.
Kingsine Electric Automation Co.,Ltd.
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Technical Applications of the KFA310 Protection Relay Test Set

Apr 27, 2025
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    KFA310, as a new-generation handheld compact protection relay testing device, has set an industry benchmark in power system testing with its outstanding performance. This all-in-one electrical test and measurement equipment integrates high-power output, high-precision measurement, and multifunctional testing capabilities, specifically designed for comprehensive testing scenarios in medium- and low-voltage distribution networks and protection devices.


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    Core Application

    1.Distribution System Protection Testing

    • Supports protection function tests including overcurrent, underfrequency load shedding, harmonics, and differential protection (requires dual-unit synchronization), simulating fault conditions to verify device operation logic.

    • Enables complete testing of circuit breakers, relays, and other equipment through multi-channel output (4×300V voltage + 3×20A current).

    2.Secondary System Accuracy Verification

    • High-precision output (standard signal source level) supports energy meter calibration, ensuring measurement accuracy.

    • 8-channel low-level output (0-8Vrms) simulates sensor signals for protection device input circuit testing.

    3.Differential Protection Specialized Testing

    • Dual-unit synchronization enables synchronous output of 6 current channels, meeting closed-loop verification requirements for transformer and busbar differential protection.

    4.Dynamic Characteristic Analysis

    • Built-in state sequence test mode allows customizable multi-state switching logic to simulate ring main unit (RMU) multi-state faults (e.g., transient/permanent faults), verifying ATS switching logic and protection device coordination.

    • Oscillation waveform superposition supports customized simulation tests to replicate complex fault scenarios.

    5.Frequency-Related Protection Testing

    • Supports rate-of-change-of-frequency (ROCOF) and frequency gradient (df/dt) testing, suitable for frequency protection validation of renewable energy grid-connected equipment.

     

    Key Technical Advantages

    1.Full-Scenario Coverage

    • Integrates core functions such as AC/DC testing, harmonic superposition, ramp testing, and state sequence, covering over 90% of relay testing requirements.

    • Maximum output capacity of 130VA enables simulation of extreme conditions like short-circuit faults.

    2.High-Precision Output Performance

    • Continuous current output: 3×10A (long-term stable operation)

    • Peak output capacity: 50A (short-duration high-precision output)

    • Voltage/current output accuracy up to 0.05 class, allowing direct use as a standard signal source for energy meter calibration.

    3.Extended Testing Capabilities

    • Built-in three-phase standard power supply and auxiliary DC output for direct power supply to devices under test.

    • This relay protection tester supports multi-device cascading; dual-unit synchronization enables 6-current-channel differential protection testing. Combined with 8-channel low-level output, it forms a complete substation secondary system test platform.

     

    Delivering Continuous Field Value

    The Kingsine KFA310 redefines the standard for medium- and low-voltage relay testing by combining multifunctional integration with laboratory-grade precision:

    • Battery-powered + full-scenario coverage eliminates traditional pain points of "insufficient power, inaccurate measurement, and poor portability."

    • Portable design (3.7kg) allows one-handed operation, while the 7-inch touchscreen enables "test-and-display" functionality, reducing testing time by 50% compared to traditional equipment.

    • 3-year warranty + modular maintenance strategy lowers lifecycle maintenance costs by over 40%.

    Whether for periodic distribution system verification or renewable energy grid-connection testing, KFA310 remains the "all-in-one toolbox" for field engineers, delivering precision, reliability, and efficiency in every scenario.

     

     

     


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