Megger DELTA 4000 Series
12 kV Insulation Diagnostic System
The new DELTA4000 Series is a fully automatic 12 kV insulation power factor/dissipation factor (tan¥ä) test set designed for condition assessment of electrical insulation in high voltage apparatus such as transformers, bushings, circuit breakers, cables, lightning arresters and rotating machinery. In addition to performing insulation power factor tests, the DELTA4000 Series can be used to measure the excitation current of transformer windings as well as to perform automatic tip-up tests and HV turns-ratio testing (an optional TTR Capacitor is available).
The test set is designed to provide a comprehensive AC insulation diagnostic test. The high power variable frequency design generates its own test signal independent of line frequency quality and the hardware design uses the latest technology available for digital filtering of the response signal. As a result, the DELTA4000 Series produces reliable results and stable readings in the shortest time with the highest accuracy, even in high interference substations.
The DELTA4000 Series operates with PowerDB software for automatic testing and reporting or with Delta Control software for real-time manual testing.
Measurements include voltage, current, power (loss), tan delta, power factor and capacitance. The test results are automatically stored in the computer and can also be downloaded directly to USB storage or a printer.
Input Power | 90 - 264 V 45 - 66 Hz 16 A max |
Output Voltage | 0 to 12 kV, continuously adjustable |
Test Frequency Range | 45-70 Hz (12 kV) 0.0001 Hz maximum resolution |
Output Power | 3.6 kVA |
Output Current | 300 mA (4 minutes) 200 mA (30 minutes) 100 mA (continuous) The power supply capacity can be expanded to 4 A at 12 kV using the optional Resonating Inductor, (Cat. No. 670600-1). |
Measuring Ranges | |
Voltage | 25 V to 12 kV, 1 V resolution |
Current | 0 to 5 Amps, 0.1 ¥ìA maximum resolution. The measurement can be corrected to either 2.5 kV or 10 kV equivalents. |
Capacitance | 0 to 100 ¥ìF, 0.01 pF maximum resolution |
Inductance | 6 H to 10 MH, 0.1 mH maximum resolution |
Power factor | 0-100% (0-1), 0.001% maximum resolution |
Dissipation factor | 0-100 (0-10,000%), 0.001% maximum resolution |
Watt Loss | 0 to 2 kW, actual power, 0 to 100 kW when corrected to 10 kV equivalent. 0.1 mW maximum resolution. The measurement can be corrected to either 2.5 kV or 10 kV equivalents. |
Noise Immunity | |
Electromagnetic | 15mA induced noise into any test lead with no loss of measurement accuracy at maximum interference to specimen current of 20:1 |
Electromagnetic | 500 ¥ìT, at 50/60 Hz in any direction |
Temperature | Operating: -20 to +55¡Æ C (-4 to +131¡Æ F) Storage: -50 to +70¡Æ C (-58 to +158¡Æ F) |
Relative humidity | Operating: 0 to 95% non-condensing Storage: 0 to 95% non-condensing |