MEGGER DELTA4000 Series | Capacitance and Dissipation Factor Test Set
- Easy to use with automatic and manual operation
- Wide frequency test voltage (1-500 Hz)
- Accurate measurement results under high noise conditions as tested to 765 kV substations
- Lightweight, rugged two-piece design, with unit weights of 14 kg and 22 kg
- New built-in intelligent temperature correction
- Eliminates the need for temperature correction tables (patent pending)
Description
The DELTA4000 Series is a fully automatic 12 kV insulation power factor/dissipation factor (tan∂) 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, inductance, 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. DELTA4110 test set is to be used with an external computer (not included) while the DELTA4310 test set comes with an onboard computer.
Application
- Power transformers
- Distribution transformers
- Instrument transformers
- Rotating machines
- Oil insulation
- Bushings
- Cables
- Capacitors
- Circuit breakers
- Surge arrestors
Features and Benefits
Performance and Accuracy- Generates its own test signal resulting in accurate and clean measurements even in the most severe conditions and in the event power is required from a portable generator.
- High noise suppression and advanced signal acquisition circuitry can handle up to 15 mA interference current or a signal to noise ratio of up to 1:20 resulting in extremely accurate and clean measurements even in the most severe conditions.
- Intelligent Temperature Correction (ITC) (patent pending) allows the user to estimate the actual temperature dependence of the test object by measuring tan delta over a frequency range. Mathematically calculating accurate individual temperature correction results in a more accurate measurement of the insulating material's condition.
- Automatic voltage dependence detection (patent pending): Various high voltage components may have a voltage dependence where tip-up testing is recommended (i.e. the dissipation factor is pending test voltage). The DELTA4000 Series has a patented method for detecting voltage dependence suggesting additional tests should be performed at different voltage levels.
- Dynamic noise suppression minimizes actual test time.
- Wide frequency range test output (1-500Hz)
- Allows testing of large capacitive specimens as well as ITC.
- Easier to test and lighter weight solution for large capacitive specimen testing.
The following table is a sample specimen size vs. frequency output:
Designed for the Field
- Two-piece design, weighing 14 kg + 22 kg, saves on effort, space, and shipping costs.
- Designed for various work environments: in the field; in a test van; in a manufacturing facility; or in a repair facility.
- Units have performed successful testing in the world's most extreme conditions including: high temperatures, low temperatures, high elevations, high noise, and high humidity.
Software Package — PowerDB LITE
- Automatic and manual operation – provides fully automatic operation for tan delta as well as excitation current and tip-up testing. The user simply selects the test object and the unit will automatically run the complete test and report the results back to the test form. The DELTA4000 Series can also be used with Delta Control software in a manual testing mode, where the operator has full control to set the test parameters including the possibility to manually adjust the output voltage and measure output current and output voltage continuously.
- Easy to save and retrieve data – information will be saved in an XML file with all historical data. This allows the user to view previous year's test sheet or trend specific test points.
- Simple, intuitive, easy-to-use interface between operator and instrument.
- Suspect data points are flagged visually with a red highlight.
- Capability to trend a specific asset over time (with optional Advanced or Pro version).
- Easily recall transformer setups from the settings menu.
Ability to interface with other transformer test units such as MLR10 (leakage reactance, capacitance banks), TTR-series (transformer turns ratio), MTO210 (winding resistance), MIT/S1-series (DC insulation), MCT-series (CT measurements).