I. Product Overview
An insulation resistance tester can be widely used for equipment maintenance in transformer substations and power plants to measure the insulation resistance, absorption ratio, and polarization index in high-voltage electrical equipment such as transformers, reactors, capacitors, circuit breakers, etc.
II. Main Functional Characteristics
1 、 The instrument has a self-calibration function. Long-press the “stop” key in the standby interface, follow the instructions from the information tips, and calibration is finished. This function is used when the test precision is not accurate enough. (Please strictly follow the instructions.)
2、The Insulation resistance tester uses an 8-bit single-chip microcomputer for control, full Chinese operation interface. Absorption ratio and polarization index measurements can be completed automatically. Withstand voltage test and quick test functions are available.
3、The output power is high. Short-circuit current is greater than 5 mA; namely, the loaded charging current is 5 mA.
4、New circuit design and digital filtering technology enable strong anti-interference ability, suitable for complex high-voltage field measurement.
5、Electromagnetic compatibility design, great shock resistance ability, safety molded case, and easy to carry. Built-in large rechargeable lithium-ion battery pack of 2600 mAh capacity, intelligent charging circuit, and long battery life.
6、Fault protection functions such as short-circuit, overload, and discharge are available, with sound and text messages to remind the user.
Main parameters of all types of insulation resistance testers
| Meter Type
| Short Circuit Current | Output Voltage | Main Functions |
| XW-2500 | 5mA | 250V 500V 1000V 2500V | 1. Four voltage switches. 2. The four 2600 mAh lithium rechargeable batteries. 3. Accurate battery testing, intelligent battery management. 4. Fault protection against short-circuit, overload, low battery, etc., with sound and text messages to remind the user. 5. Automatic computing of absorption ratio and polarization index. 6. Measurement methods include four options: insulation test, absorption ratio, polarization index, quick test. 7. Residual voltage is displayed after the test, which makes users clear about the discharge voltage. 8. Automatic shutdown without action after 10 minutes. |
| XW-5000 | 5mA | 500V 1000V 2500V 5000V | |
| XW-10000 | 5mA | 1000V 2500V 5000V 10000V |
- Rated working conditions: temperature: 0 ℃to 40 ℃; relative humidity: 20% ~ 90% RH.
- Storage conditions: – 10 ℃to 50 ℃; Relative humidity:< 90% RH.
- Power supply: AC/DC
DC16.8V 2600mAh AC 140V~240V 50Hz
- External dimension：285mm×247mm×120mm Weight：2200g
- Basic voltage error：±5%(25℃)。
- The measuring range and basic error(25℃).
| 250V | 0.10MΩ～25GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (0.1 MΩ～5 GΩ ) | |
| ±20%rdg. ±5dgt. ( 5 GΩ～25GΩ ) | ||
| 500V | 1MΩ～50GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (1 MΩ～10GΩ ) | |
| ±20%rdg. ±5dgt. (10 GΩ～50GΩ ) | ||
| 1kV | 2MΩ～100GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (2 MΩ～20GΩ ) | |
| ±20%rdg. ±5dgt. (20 GΩ～100GΩ) | ||
| 2.5kV | 5MΩ～500GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (5 MΩ～50 GΩ) | |
| ±20%rdg. ±5dgt. (50 GΩ～250GΩ) | ||
| ±30%rdg. ±5dgt. (250 GΩ～500GΩ ) | ||
| 5 kV | 10MΩ～1000GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (10 MΩ～100GΩ ) | |
| ±20%rdg. ±5dgt. (100 GΩ～500GΩ ) | ||
| ±30%rdg. ±5dgt. (500 GΩ～1000GΩ) | ||
| 10 kV | 20MΩ～2000GΩ | |
| Accuracy | ±5%rdg. ±5dgt. (20 MΩ～200GΩ ) | |
| ±20%rdg. ±5dgt. (200 GΩ～1000GΩ) | ||
| ±30%rdg. ±5dgt. (1000GΩ～2000GΩ) | ||
