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INTRODUCTION
MEWOI4520 series High Voltage Insulation Resistance Tester an intelligent high voltage insulation resistance tester of well research and development by our company. The instrument has perfect testing function of various insulation resistance parameters and excellent anti-interference ability, which can be used for insulation resistance testing of large-capacity high voltage electrical equipment and transmission lines. The instrument adopts true color touch screen, and all the test data and battery power are displayed on the same screen for viewing clear and obvious. The combination of knob switch and button makes the operation very simple. The user does not need to memorize the operation method, but just click "HELP" on the screen to pop up the operation method, effectively guiding the user to operate the instrument. The instrument has the function of rapid discharge, the charge of the tested object is released automatically after the test. The voltage monitor of the instrument automatically monitoring the live voltage of the measured object, when the voltage exceeding 36V will automatically prohibits testing and effectively protects the instrument and operator. The instrument adopts large capacity rechargeable lithium battery pack. The test timer of the instrument automatically records the test time and stores the test results with date and time. The touch screen can easily check the historical data recorded. The fully isolated USB interface can upload the test data to the PC safely. The instrument is equipped with the test line with double insulation and shielding layer, and the high voltage rod is equipped with replaceable crocodile clip and hook, which can adapt to various test places. The instrument adopts a strong double-shell structure, and the outer case of the instrument has a protection rating of IP65, which can prevent the intrusion of moisture and dust as well as prevent to impact in the transportation and storage process, effectively protect the instrument. MEWOI4520 series High Voltage Insulation Resistance Tester with a wide measurement range, high resolution, convenient operation, strong and durable, accurate and reliable, stable performance and strong anti-interference ability. The instrument has the functions of insulation resistance test (IR), polarization index test?PI), dielectric absorption ratio test (DAR), ramp test mode (RAMP), filtered resistance test mode (10S, 20S, 30S, 40S four selections), voltage test (V), capacity measurement (uF), leakage current measurement (nA), voltage monitor, test timer etc. The instrument is applied to the insulation resistance test of cable, motor, generator, transformer, transducer, high voltage switch, lightning arrester and other large equipment, and can be used for the insulation resistance test of large-capacity high voltage electrical equipment and transmission line, which is the power, telecommunications, meteorology, computer rooms, oil fields, mechanical and electrical installation and maintenance and power supply departments of industrial and mining enterprises commonly used but essential instruments. |
MAIN FEATURES
1. Suitable for insulation resistance testing of cable, motor, generator, transformer, mutual inductor, high voltage switch, arrester and other large equipment. |
2. Insulation Resistance Range: 0.5MΩ~10TΩ |
3. Rated Voltage: 250v~5Kv(5 gears) |
4. Shout Circuit Current: >7mA MAX Voltage monitor function, Test timer function , Automatic discharge function Insulation resistance measurement (IR); polarization index measurement (PI); absorption ratio (DAR);Ramp Test Mode (RAMP); filtered resistance test (FR) |
SPECIFICATION
| Function | Description |
| Function | Insulation resistance measurement (IR); polarization index measurement (PI) ;Dielectric Absorption Ratio Test(DAR); Ramp Test Mode(RAMP); filtered resistance test(10S, 20S, 30S, 40S 4 options); Voltage measurement(V); capacity measurement(uF); current measurement(nA) |
| Power Supply | Rechargeable lithium battery pack 6.2Ah |
| Rated Voltage | 250V / 500V / 1000V / 2500V/5000V |
| Output Voltage Accuracy | (5%~10%)±10V |
| Insulation Resistance Range | 0.5MΩ~10TΩ |
| Short Circuit Current | >7mA MAX |
| Polarization Index Test(PI) | Yes |
| Dielectric Absorption Ratio Test(DAR) | Yes |
| Ramp Test Mode | Test at 10% of the preset voltage until the peset voltage |
| Filtered Resistance Test Mode | 10S, 20S, 30S, 40S |
| Voltage Measurement | Range: AC/DC 0V~1000V; Accuracy: ± 5%rdg±3V |
| Capacitance Measurement | Range: 10nF~25uF; Accuracy: ±10% ± 10 nF |
| Leackage Current Measurement | Range: 0.01nA~9.00mA; Accuracy: ± 5%rdg+0.5nA |
| Voltage Monitor | Monitor the voltage of the measured object, and monitor discharge status after test, Forbidden to test when voltage is larger than 36V, protect instrument and operator. |
| Test Time | Automatic record test time, time range: 0s~9999s |
| Storage Function | Automatically store the test data with test date and time, total of 1000 groups |
| Upload Function | Upload the stored data to computer with USB communication cable. |
| Battery Power Display | With battery power display, when battery voltage low will remind to replace the battery |
| Automatic Shutdown | After 15 minutes start up will shut down automatically without any operation |
| Meter Dimension | 280mm×260mm×160mm |
| Weight | 4900g |
| Test Wire | Red color high voltage test wire 1 pcs (with alligator clip 1PCS and hook 1PCS), green color test wire 1PCS, black color test wire 1PCS |
| Protection Level | Close the case IP65, open the case IP40 |
| Withstand Voltage | 3mA AC 50Hz |
| Working Temperature and Humidity | -20℃~50℃, 80%rh |
| Storage Temperature and Humidity | -25℃~65℃, 80%rh |
| Insulation Resistance | 50MΩ(1000v)(between the test circuit and shell) |
| Withstand Voltage | AC 3Kv 50Hz 1min(between the test circuit and shell) |
| Suitable Safety Standard | IEC61010-1, IEC61326-1 |
Measure Range and Accuracy
Function | Output Voltage | Range（Ω） | Accuracy | Resolution |
250V(±2%) | 500K～25M | ±3%rdg±5dgt | 0.01M | |
25M～500M | ±5%rdg±5dgt | 0.1 | ||
500M～5G | ±5%rdg±5dgt | 1M | ||
5G～20G | ±10%rdg±5dgt | 10M | ||
500V(±2%) | 1M～50M | ±3%rdg±5dgt | 0.1M | |
50M～1G | ±5%rdg±5dgt | 1M | ||
1G～10G | ±5%rdg±5dgt | 10M | ||
10G～40G | ±10%rdg±5dgt | 0.1G | ||
1000V(±2%) | 2M～100M | ±3%rdg±5dgt | 0.1M | |
100M～2G | ±5%rdg±5dgt | 1M | ||
2G～20G | ±5%rdg±5dgt | 10M | ||
20G～80G | ±10%rdg±5dgt | 0.1G | ||
2500V(±2%) | 10M~250M | ±3%rdg±5dgt | 0.1M | |
250M～5G | ±5%rdg±5dgt | 1M | ||
5G～50G | ±5%rdg±5dgt | 10M | ||
50G～200G | ±10%rdg±10dgt | 1G | ||
| 5000V(±2%) | 50M~500M | ±3%rdg±5dgt | 1M | |
| 500M～10G | ±5%rdg±5dgt | 10M | ||
| 10G～100G | ±5%rdg±5dgt | 0.1G | ||
| 100G~400G | ±10%rdg±10dgt | 1G | ||
| 10KV | 1.00MΩ～500GΩ | ±5%rdg±3dgt | ||
| 500GΩ～2.00TΩ | ±10%rdg±3dgt | |||
| 2.00TΩ～5.00TΩ | ±20%rdg±3dgt | |||
Voltage | AC/DC： 0.0V～750V | ±5%rdg±5dgt | 0.1V | |
SELECTION GUIDE
| Model No./Link | Voltage Range | Resistance Range | Resolution | Accuracy | Short circuit current | Polarization Index Absorption Ratio | Power Supply | Others |
MEWOI4520B | 250V / 500V / 1000V / 2500V//5KV/10KV | 20TΩ | 7mA | √ | Rechargeable lithium battery pack 6.2Ah | DAR/PI | ||
MEWOI4520C | 250v~15Kv(7gears) | 30TΩ | 7mA | √ | Rechargeable lithium battery pack 6.2Ah | DAR/PI | ||
MEWOI4520 | 250V / 500V / 1000V / 2500V//5KV | 10TΩ | ±5%rdg±3dgt | 7mA | √ | Rechargeable lithium battery pack 6.2Ah | DAR/PI | |
MEWOI4500B | 250V / 500V / 1000V / 2500V//5KV/10KV | 5TΩ | ±5%rdg±3dgt | 5mA | √ | Rechargeable lithium battery pack 5.2Ah | DAR/PI | |
| 250V / 500V / 1000V / 2500V//5000V | 2TΩ | ±5%rdg±3dgt | 5mA | √ | Rechargeable lithium battery pack 5.2Ah | DAR/PI | |
| 50V / 250V / 500V / 1000V / 2500V//5000V | 0.1MΩ~400GΩ | 0.01M | ±3%rdg±5dgt | 2mA | √ | DC 1.5V LR14X6PCS | DAR/PI |
MEWOI4480A | 50V / 250V / 500V / 1000V / 2500V | 0.1MΩ~200GΩ | 0.01M | ±3%rdg±5dgt | 2mA | √ | DC 1.5V LR14X6PCS | DAR/PI |
| 50V / 250V / 500V / 1000V / 2500V//5000V | 0.1MΩ~400GΩ | 0.01M | ±3%rdg±5dgt | 2mA | - | DC 1.5V LR14X6PCS | - |
| 50V / 250V / 500V / 1000V / 2500V | 0.1MΩ~200GΩ | 0.01M | ±3%rdg±5dgt | 2mA | - | DC 1.5V LR14X6PCS | - |
| 1000V | 1MΩ～20GΩ | 20MΩ: 10kΩ, 200MΩ: 100kΩ, 2000MΩ: 1MΩ, 20GΩ: 10MΩ, 200GΩ: 100MΩ | 1MΩ～200MΩ: ± ( 3.0%+5 ), 200MΩ～10GΩ: ± ( 5.0%+5 ), 10GΩ～200GΩ: ± ( 10.0%+5 ) | - | - | - | - |
| 2500V | 1MΩ～20GΩ | - | - | - | - | ||
| 5000V | 1MΩ～200GΩ | - | - | - | - | ||
| 1000V | 0～19990MΩ | 0.01MΩ 0.1MΩ， 1.0MΩ， 10.0MΩ | 0～2000MΩ≤±5%±2d, 2000MΩ～19990MΩ≤10%±2d | ＞1.6mA | - | 8×1.5V(AA，R6)battery | - |
| 2500V | 0～19990MΩ | 0.01MΩ 0.1MΩ， 1.0MΩ， 10.0MΩ | 0～2000MΩ≤±5%±2d, 2000MΩ～19990MΩ≤10%±2d | ＞1.6mA | - | 8×1.5V(AA，R6)battery | - |
| 5KV | 500GΩ @ 5kV. | 1 MΩ | ± (10%+5Dgt) | 5mA | √ | Internal rechargeable battery | Printer+Touch Screen |
| 10KV | 1000GΩ @ 10kV. | 1 MΩ | ± (10%+5Dgt) | 5mA | √ | Internal rechargeable battery | Printer+Touch Screen |
| 10KV | 10TΩ @ 10kV. | 1 MΩ | ± (10%+5Dgt) | 5mA | √ | Rechargeable battery or AC Power Supply | Printer+Capacitance +Leakage Current |
| 15KV | 20TΩ @ 15kV. | 1 MΩ | ± (10%+5Dgt) | 5mA | √ | Rechargeable battery or AC Power Supply | Capacitance +Leakage Current |
| 20KV | 20TΩ @ 15kV. | 1 MΩ | ± (10%+5Dgt) | 5mA | √ | Rechargeable battery or AC Power Supply | Capacitance +Leakage Current |
