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Microcomputer Relay Protection Tester Usage
**Microcomputer Relay Protection Tester Instructions:**
**Hardware Requirements**
The PC should have at least a Pentium 200 processor, 32MB of memory, and a monitor with a resolution of 800 x 600 or higher. It is compatible with Windows 98 operating systems on both laptops and desktops.
**Connecting the Hardware**
Before connecting, make sure both the tester and the PC are turned off. Use a 9-core communication cable to connect the PC’s communication port to the tester’s back panel. Once connected, power on both the tester and the PC. Navigate to the “PC†menu in the offline software on the tester to enter the communication mode.
**Software Operation**
Start the PC running Windows 98. It is recommended to set the display resolution to 800 × 600. Open the “PSZDKJ†file from the desktop. From there, you can access various sub-menus to perform different types of tests.
**AC and DC Testing**
This test module supports AC voltage, current, and power relay protection devices, as well as automatic or manual testing. It also works for DC voltage and current relays in similar modes.
This program is one of the most powerful modules available. It allows users to set the amplitude, phase, and frequency of each phase. The settings can be adjusted step by step over time, enabling comprehensive testing of various relays and protective devices. It measures key parameters such as operating values, return values, and operating times.
The initial values are set at 57.73V for voltage, 5A for current, 120° phase difference, and 50Hz frequency. For DC tests, if the “DC†column is selected, the output will be DC. If not selected, the parameter remains fixed during the test.
**Automatic Testing**
During automatic testing, the changing parameters adjust automatically according to the set step size and interval time, while other values remain constant. When the relay operates, the program stops the output and returns to the main screen.
**Manual Testing**
In manual mode, the program continuously outputs the current value. Clicking the “Add†button increases the variable by one step, while “Decrease†reduces it. When the relay operates, the operating value and time are recorded. The operator can then adjust the parameters in the opposite direction to record the return value and time. This method is useful for determining return characteristics.
**Test Interval Time**
This refers to the time between each step change during automatic testing. You can open, save, or restore data using the corresponding functions. After testing, you can use “Restore Parameters†to reset the system to its initial state.
**Data Display**
During the test, the computer automatically calculates and displays line voltage, negative sequence voltage, zero sequence voltage, and more. It also shows vector diagrams of current and voltage for each phase. These vectors can be zoomed in or out using a magnifying glass tool.
**Basic Performance of Microcomputer Relay Protection Tester**
1. **Sensitivity**: The ability to detect faults, often expressed as a sensitivity factor.
2. **Reliability**: No malfunctions occur during operation.
3. **Speed**: Faults are cleared in the shortest possible time.
4. **Selectivity**: Only the affected part is isolated, ensuring minimal disruption to the rest of the system.
When selecting a relay protection plan, these four basic performance criteria must be met, along with cost-effectiveness. This includes considering investment costs, maintenance expenses, and potential losses due to failures or misoperations.
**Product Features**
1. The intelligent host uses a high-speed digital signal processor (DSP), offering fast processing and high accuracy.
2. The stand-alone device features a user-friendly mouse and large LCD display, allowing field testing of various relays and microcomputer protections.
3. Connecting to a computer enables complex, automated testing through Chinese software, including fault playback, protection setting scanning, and real-time data storage.
4. A 320×240 graphic LCD display provides clear, intuitive operation and test results in Chinese.
5. The “fool-proof†design simplifies operation with a rotary mouse, making it easy to use and durable.
6. High-resolution analog-to-digital conversion ensures accurate sine wave output with minimal distortion.
7. A new high-fidelity amplifier provides high power output, up to 120V/120A per phase.
8. Direct AC/DC output allows flexible control of angle, frequency, and harmonic content.
9. The hardware is designed with reliable thermal management and built-in protection features.
10. A dedicated DC power supply offers adjustable 110V and 220V outputs.
11. Multiple input/output contacts support various signal types and intelligent recognition.
12. Compact and lightweight design makes it ideal for field use.
**Technical Specifications**
1. **AC Current Source**
- Phase Output: 0–30A, Accuracy: 0.2%
- Three-phase Parallel Output: 0–90A
- Maximum Power per Phase: 420VA
- Frequency Range: 0–1000Hz, Accuracy: 0.001Hz
- Harmonics: 2–20 times, Phase: 0–360°, Accuracy: 0.1°
2. **DC Current Source**
- Output: 0–±30A, Accuracy: 0.2%
3. **AC Voltage Source**
- Phase Voltage Output: 0–125V, Accuracy: 0.2%
- Line Voltage Output: 0–250V
- Power: 75VA/100VA
- Frequency Range: 0–1000Hz, Accuracy: 0.001Hz
- Harmonics: 2–20 times, Phase: 0–360°, Accuracy: 0.1°
This detailed guide ensures that users can operate the microcomputer relay protection tester effectively and safely, whether in the field or in a controlled environment.