The DELTA4000 is an automatic 12 kV insulation power factor/tan delta test set designed for the immediate condition assessment of electrical insulation. In addition to traditional power frequency (50/60 Hz) testing, the DELTA4000 uses 1 Hz power factor/tan delta to enhance power frequency assessment of high voltage transformers, bushings, circuit breakers, cables, lightning arresters, and rotating machines. Using the same connection and software as power frequency tests, 1 Hz improves maintenance planning by reducing the need for historical trending and proprietary databases.


Two configurations make up the series:

  • DELTA4110 - comes with an external computer (not included) and consists of the DELTA4100 control unit and DELTA4010 high voltage unit
  • DELTA4310A - comes with a touch screen display interface and an on-board computer, PowerDB software, and printer. It allows you to connect to and control the MWA300, TTR300/310E, MTO300, MLR10, and some Megger insulation resistance instruments

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), power factor/tan delta, inductance, power factor, and capacitance. The test results are automatically stored in the computer and can also be downloaded directly to a USB drive or a printer.

Input Power

90 - 264 V 45 - 66 Hz

16 A max

No loss in performance when used with portable generator.


Output Voltage

0 to 12 kV, continuously adjustable


Test Frequency Range

45-70 Hz (12 kV)

15-400 Hz (4 kV)

1-505 Hz (250V)

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 μA maximum resolution. (The measurement can be corrected

to either 2.5 kV or 10 kV equivalents.)

Capacitance: 0 to 100 μF, 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.


Temperature Correction

Individual temperature correction:

from 5°C to 50°C insulation test temperature to 20°C reference

Standard tables:

As by international standards and manufacturers’ data


Accuracy

Voltage: ±(1% of reading)

Current: ±(1% of reading)

Capacitance: ±(0.5% of reading + 0.1 pF)

Inductance: ±(0.5% of reading + 1 mH)

Power Factor and Dissipation Factor: ±(0.5% of reading + 0.02%)

Watt Loss: ±(1% of reading + 1mW)

Frequency: ±0.005% of reading


Noise Immunity

Electrostatic:

15mA induced noise into any test lead with no loss of measurement accuracy

at maximum interference to specimen current of 20:1

Electromagnetic:

500 μT, at 50/60 Hz in any direction


Measurement

UST: Ungrounded Specimen Testing

GST: Grounded Specimen Testing

DELTA4000 datasheet