Single Phase Relay Protection Tester – Multi-Function AC/DC Output
A compact single-phase relay protection tester with adjustable AC/DC voltage and current output, designed for calibration, commissioning, and maintenance of time relays, overcurrent relays, and protection devices in industrial and utility systems.
This single-phase relay protection tester is engineered for functional testing, calibration, and verification of protection relays across industrial control panels, substations, and electrical distribution systems.
With adjustable AC and DC voltage outputs up to 250V, and DC current output up to 20A, the unit enables precise simulation of relay operating conditions. It is suitable for testing:
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Time relays
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Overcurrent relays
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Differential relays
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Phase protection relays
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Single-phase protection devices
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AC and DC control relays
The tester supports both adjustable and fixed DC outputs (24V, 48V, 110V, 220V), allowing compatibility with a wide range of relay types used in protection circuits.
High-resolution timing capability (0.1 ms resolution) ensures accurate measurement of relay trip times, with programmable time settings up to 9999.999 seconds.
Designed for professional field use, the instrument features a digital display interface and robust enclosure for transport and on-site commissioning.
Key Features
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Single-phase relay protection testing
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Adjustable AC voltage: 0–250V
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Adjustable DC voltage: 0–250V
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Adjustable DC current: 0–20A
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Fixed DC outputs: 24V / 48V / 110V / 220V
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High-precision timing resolution: 0.1 ms
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Programmable time range: 0–9999.999 s
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Digital display
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CE & RoHS certified
Applications
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Substation maintenance
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Industrial control panel testing
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Relay commissioning
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Preventive maintenance programs
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Electrical training and workshop environments
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Power distribution system diagnostics
