Technical Applications of the KFA310 Protection Relay Test Set

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 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.

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.

• 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

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.