1. 서론
This manual provides essential instructions for the safe and effective operation, setup, and maintenance of the Megger MIT525-US 5kV Insulation Resistance Tester. Please read this manual thoroughly before using the instrument to ensure proper functionality and to prevent potential hazards.
그림 1: 앞쪽 view of the Megger MIT525-US 5kV Insulation Resistance Tester. The device features a digital/analog display, control knobs, and test terminals. Note: The device shown in the image is a Megger MIT515, which is representative of the MIT series design.
2. 안전 정보
Always adhere to the following safety precautions to prevent injury and damage to the instrument:
- 사용하기 전에 기기가 제대로 작동하는지 확인하십시오.
- 습기가 많은 환경이나 폭발성 분위기에서는 시험기를 작동하지 마십시오.
- Always use the provided high-quality, flexible silicon test leads that meet IEC 61010-31:2008 safety regulations.
- Verify the CAT IV 600 V safety rating on all terminals for safe application.
- Never touch test leads or the circuit under test during operation.
- Discharge the circuit completely after testing before disconnecting leads.
- 전기 안전 테스트에 대해서는 해당 지역의 안전 규정 및 표준을 참조하십시오.
3. 설정
3.1 풀기 및 검사
Upon receiving your Megger MIT525-US, carefully unpack all components and inspect for any signs of damage. The package should include the main unit, test leads, and power cable.
3.2 장비에 전원 공급하기
The MIT525-US operates from line power (85 to 265 V, 50/60 Hz) or its internal lithium-ion battery. The battery charges automatically when connected to line power, even during operation.
- Connect the power cable to the instrument's power input and a suitable AC outlet.
- Allow approximately 2.5 hours for a full battery charge. A 0.5-hour charge provides approximately 1 hour of testing.
3.3 테스트 리드 연결
Connect the provided test leads to the appropriate terminals on the instrument. The MIT525-US features dedicated terminals for positive (+), negative (-), and guard connections.
- Connect the red lead to the positive (+) terminal.
- 검은색 전선을 음극(-) 단자에 연결하십시오.
- Connect the blue lead to the guard terminal (if required for high accuracy measurements).
4. 사용 설명서
4.1 Basic Insulation Resistance (IR) Test
The MIT525-US offers resistance measurement up to 10 TΩ for 5 kV models.
- 전원 켜기: 로터리 스위치를 원하는 테스트 볼륨으로 돌립니다.tage (e.g., 500 V, 1 kV, 2.5 kV, 5 kV). The instrument will power on and display the selected voltage.
- Connect to DUT: Connect the test leads to the Device Under Test (DUT) according to safety guidelines.
- 테스트 볼륨 선택tage: 볼륨을 사용하세요tage selection knob to fine-tune the test voltage in 10 V steps (50 V to 1 kV) or 25 V steps (1 kV to max test voltag이자형).
- 테스트 시작: 를 누르세요 시험 button. The instrument will apply the test voltage and display the insulation resistance.
- 측정 읽기: The digital/analog display will show the resistance value.
- 테스트 종료: 릴리스하다 시험 button. The instrument will automatically discharge the DUT.
4.2 Advanced Diagnostic Tests
The MIT525-US supports various diagnostic tests including Polarization Index (PI), Dielectric Absorption Ratio (DAR), Dielectric Discharge (DD), Step Voltage (SV), and Ramp tests. These tests are crucial for assessing insulation quality and trending.
- PI/DAR Test: Select the PI/DAR mode using the rotary switch. The instrument will automatically perform timed IR measurements at specific intervals to calculate these ratios.
- DD Test: Select the DD mode. This test measures the discharge current after a period of charging, indicating insulation degradation.
- SV Test: In Step Voltage mode, the instrument applies a series of increasing 테스트 볼륨tages, allowing for detection of voltage-종속 절연의 약점.
- Ramp 시험: R은amp test gradually increases the test voltage, providing a detailed breakdown characteristic of the insulation.
Refer to the on-screen menu and detailed instructions within the instrument's internal software for specific parameter settings and interpretation of results for advanced tests.
4.3 Voltmeter Function
The instrument includes a dedicated voltmeter function (30 V to 660 V) with frequency measurement to check for induced voltages on the circuit before testing.
- 로터리 스위치를 V (Voltmeter) position.
- 테스트 리드를 회로에 연결합니다.
- 디스플레이에는 측정된 부피가 표시됩니다.tage와 주파수.
5. 유지관리
5.1 청소
부드러운 천으로 악기의 외부를 청소하세요.amp 천으로 닦아주세요. 연마성 세제나 용제는 사용하지 마세요. 기기 내부로 습기가 들어가지 않도록 주의하세요.
5.2 배터리 관리
The lithium-ion battery is designed for extended capacity and rapid charging. For optimal battery life, avoid prolonged storage in a fully discharged state. Recharge the battery regularly.
5.3 교정
Regular calibration by authorized service centers is recommended to maintain the instrument's accuracy and performance. Refer to Megger's official web교정 서비스에 대해서는 사이트 또는 고객 지원팀에 문의하십시오.
6. 문제 해결
| 문제 | 가능한 원인 | 해결책 |
|---|---|---|
| 기기의 전원이 켜지지 않습니다. | Discharged battery or no AC power. | Connect to AC power and allow battery to charge. |
| 부정확한 판독값. | Poor lead connections, environmental factors, or instrument out of calibration. | Check lead connections. Ensure proper environmental conditions. Consider professional calibration. |
| 오류 메시지가 표시됩니다. | Specific operational error or internal fault. | Refer to the instrument's on-screen error codes or contact Megger support. |
For issues not listed here, please contact Megger technical support.
7. 사양
| 매개변수 | 값 |
|---|---|
| 모델 | MIT525-US |
| 테스트 볼륨tage | 5.0 kV, 2.5 kV, 1.0 kV, 500 V, 250 V (10 V steps 50 V to 1 kV, 25 V steps 1 kV to max. test voltage) |
| 저항 측정 범위 | Up to 10 TΩ (for 5 kV models) |
| 현재 측정 범위 | 0.01nA ~ 6mA |
| 정확성 | ±5% up to 1 TΩ at 5 kV |
| Voltmeter Function | 30 V to 660 V with frequency measurement |
| 표시하다 | 디지털 / 아날로그 |
| 전원 공급 장치 | Line power (85 to 265 V, 50/60 Hz, 60 VA) and rechargeable Lithium-ion battery |
| 배터리 충전 시간 | 2.5 hours for full charge (0.5 hour charge for 1 hour testing) |
| 안전 등급 | CAT IV 600 V on all terminals |
| 작동 온도 | -4°F ~ +122°F(-20°C ~ +50°C) |
| 치수(패키지) | 17.4 x 14 x 12.6 인치 |
| 무게(품목) | 16.9파운드(7.67kg) |
8. 보증 및 지원
For warranty information, technical support, or service inquiries, please contact Megger directly. Details can typically be found on the official Megger web웹사이트 또는 공인 대리점을 통해 구입하실 수 있습니다.
- 온라인 리소스: Visit the official Megger website for product documentation, FAQs, and software updates.
- 고객 서비스: Contact Megger customer service for assistance with product operation, troubleshooting, or repair services.
