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HF-RT-213 Single Phase Thermal Overload Relay Tester
This Single Phase Thermal Overload Relay Tester is applied to calibrate thermal relays, low-voltage motor protectors and thermocouples. It supports adjustable output current, synchronous action time test and multi-device series calibration, featuring stable performance, high precision and easy operation for power inspection and laboratory use.
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For the operation and maintenance of power systems, national power industry regulations stipulate that motor protection devices must undergo comprehensive annual inspections after commissioning plus periodic routine tests, making protector calibration a long-term, heavy workload task.
To facilitate convenient, efficient testing of motor protectors, we developed the HF-RT-213 Single-phase Thermal Relay Calibrator through extensive tests based on protector performance characteristics. It mainly calibrates motor protectors, current-type motor protectors and thermocouples. Verified by abundant experiments, it can also inspect and test all overcurrent automatic protection devices effectively.
Equipped with advanced single-chip microcomputer control technology, the instrument boasts easy operation, stable reliable testing performance and quick clear readings. High-precision sensors guarantee accurate test results.
Application Scope
- Testing all types of low-voltage motor protectors and thermal relays
- Product quality inspection and factory commissioning for motor protector manufacturers
- R&D, experiments and teaching for universities and scientific research institutions
Key Features & Technical Specifications
Main Features
- Output current: 0~50A or 0~500A (customizable, max. 1000A optional)
- Synchronously measure the operating time of thermal relays and thermocouples
- Calibrate multiple devices connected in series simultaneously to improve work efficiency
Detailed Technical Parameters
| No. | Item | Specification |
|---|---|---|
| 1 | Power Input | AC 220V, 50Hz |
| 2 | Meter Accuracy Class | 0.5 grade (customizable) |
| 3 | Output Current | 0~50A or 0~500A (customizable, up to 1000A) |
| 4 | Time Measurement Range | 0 ~ 999.999 s |
| 5 | Net Weight | 30 kg |
Operating Steps for Single Phase Thermal Overload Relay Tester
- Before power-on, turn off the power switch and adjust the voltage regulator knob back to zero position.
- Connect AC 220V power input cable correctly, then link the current output terminals to the tested thermal relay.
- Switch on the power, set the required output current value, press Start and Stop buttons repeatedly to finish relay characteristic testing.
Packing List
| Item No. | Description | Quantity | Unit |
|---|---|---|---|
| 1 | Main Tester Unit | 1 | Set |
| 2 | Input Power Cable (AC220V) | 1 | Piece |
| 3 | High Current Output Test Leads | 2 | Pieces |
| 4 | Connection Terminals & Clamps | 1 | Set |
| 5 | Operation Manual (English & Chinese) | 1 | Copy |
| 6 | Factory Calibration Certificate | 1 | Copy |
| 7 | Spare Fuse | 2 | Pieces |
| 8 | Hard Transport Case | 1 | Piece |
FAQ: Single Phase Thermal Overload Relay Tester
Q1: What equipment can this tester calibrate?
A: It is used for testing all kinds of low-voltage motor protectors, thermal relays and thermocouples. It can also calibrate all overcurrent automatic protection devices in power systems.
Q2: What are the available output current ranges?
A: Standard ranges are 0~50A and 0~500A. Custom current up to 1000A can be made on request.
Q3: Can it measure the operating time of thermal relays?
A: Yes. It can synchronously test the action time of thermal relays and thermocouples, with time measuring range from 0 to 999.999 seconds.
Q4: Can multiple relays be tested at the same time?
A: Sure. Several relays can be connected in series for simultaneous calibration, which greatly improves working efficiency.
Q5: What power supply does the tester need?
A: The required input power is AC 220V, 50Hz single-phase power supply.
Q6: Is the meter accuracy adjustable?
A: The default accuracy class is 0.5 grade, and customized accuracy is acceptable.
Q7: How much does the tester weigh?
A: The net weight of the whole machine is 30kg, easy for on-site transportation and field testing.
Q8: Where is this instrument widely used?
A: It serves power maintenance work, factory outgoing inspection, as well as teaching and experimental research in universities and research institutions.
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