NRJF-H Partial Discharge Tester is widely used to measure the partial discharge of transformers, mutual inductors, high-voltage switch, zinc oxide arrester, power cables and other high-voltage electrical products, it also can make type tests and monitor insulation operation.
This type has the advantage of high sensitivity, wide range of capacitance, being well equipped for input unit impedance detecting and more variants of frequency bands (total 9 groups of frequency bands). After proper setting, the discharge impulse amount can be read directly. The indicating and digital meters are shown simultaneously. The instrument uses color LCD display graphics, compared with the traditional CRT, it has stronger waveform locking function, which is more conducive to observation and analysis graphics.
Overview
● High measuring sensitivity
● Wide range of capacitance
● Being well equipped for input unit impedance detecting and more variants of frequency bands (9 groups of frequency bands).
● After proper setting, the discharge impulse amount can be read directly.
● The indicating and digital meters are shown simultaneously.
● Adopt color LCD display graphics, compared with the traditional CRT, it has stronger waveform locking function, which is more conducive to observation and analysis graphics.
Models
1. Main technical parameters:
| Operating environment | Temperature | 0℃ ~ 40℃ ±2℃ | ||
| Relative humidity | 80% or less | |||
| Power supply | AC 220V ± 22V 50Hz | |||
| Grounding requirements | Grounding resistance< 1Ω | |||
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No severe vibration and mechanical shock; Air does not contain the dust and other mixture which enough to corrode the instrument; No strong electromagnetic interference; Good ventilation conditions. |
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| The measuring capacity range | 6PF ~ 250μF | |||
| Frequency band of amplifier |
Low terminal: 10kHz 20kHz 40kHz (optional) High terminal: 80kHz 200kHz 300kHz (optional) |
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| Gain adjustment of amplifier | Coarse turning with 6 gears the gain between the gear is 20±1 db; fine turning range > 20db. | |||
| Time Windows | Displaying color | Blue | ||
| Width of window | Adjustable range 15° ~ 150° | |||
| Window position | Each window can be rotated 0°~ 170° | |||
| Two time windows can be opened separately or simultaneously | ||||
| Discharging meter | Display as 3 ½ LED digital meter 0-100.0 error < ± 5% (full scale) | |||
| Ellipse Time base | Frequency: 50Hz or arbitrary frequency | |||
| Ellipse is displayed in yellow. | ||||
| Ellipse Rotation: 30° each gear can rotate at 180° | ||||
| Display: ellipse - straight line | ||||
| High-frequency ellipse input voltage <220V and the uptake power < 1 VA | ||||
| Waveform Locked | You can lock the waveform of anytime to facilitate observation and analysis. | |||
| Testing voltage meter |
(1) Range: 100kV ( can be expanded ) (2) Display : 3 ½ digital voltmeter (3) Accuracy: better than ± 5% ( full scale ) |
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| Inside and outside with zero-mark function | ||||
| Dimension and weight | Dimension: 450 * 450 * 190 ( W * D * H ) mm | |||
| Weight: about 16kg | ||||
2. Detection sensitivity (see below table):
| Input unit number | Turning capacitance | Unit | Sensitivity (pC) |
| (Unsymmetrical Circuit) | |||
| 1 | 6-25-100 | pF | 0.02 |
| 2 | 25-100-400 | pF | 0.04 |
| 3 | 100-400-1500 | pF | 0.06 |
| 4 | 400-1500-6000 | pF | 0.1 |
| 5 | 1500-6000-25000 | pF | 0.2 |
| 6 | 0.006-0.025-0.1 | μF | 0.3 |
| 7 | 0.025-0.1-0.4 | μF | 0.5 |
| 8 | 0.1-0.4-1.5 | μF | 1 |
| 9 | 0.4-1.5-6.0 | μF | 1.5 |
| 10 | 1.5-6.0-25 | μF | 2.5 |
| 11 | 6.0-25-60 | μF | 5 |
| 12 | 25-60-250 | μF | 10 |
| 7R | Resistance | 0.5 |
