Tettex 2820A Automated C, L and tan δ Measuring Bridge

Tettex 2820A Automated C, L and tan δ Measuring Bridge
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Tettex 2820A
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Datasheet

The Dielectric-Loss Analyzing System 2820a is designed for measurement of low dielectric losses and impedances (Dissipation Factor and Power Factor) of high-voltage apparatus (e.g. the insulation of bushings).
 

The instrument works on the principle of a combined bridge-vector-meter and is capable of analyzing capacitive and inductive loads with high accuracy and stability.
 

The Graphical User Interface of the instrument is highly intuitive, focussed on convenience with built-in useful programs (e.g. support tool for tuning the external high-voltage supply) and uses a large colour touch screen as the input device.
 

Features:

  • Accuracy capacitance 0.1%, tan δ 1x10 -4
  • Additional signal analysis capabilities like Spectrum Analyser, Digital Scope and Data Logger are integrated
  • Advanced, well-engineered test equipment, optimised to the specific application
  • Compact, reliable and EMC hardened design
  • Integrated solution with built-in industrial computer

Benefits:

  • Easy to operate with Manual and Automated test modes, Software assisted test preparation, Execution and Trend analysis.
  • Complete Measuring System including power supplies, standard capacitors, current comparators, test cells, application support and calibration from one supplier
  • Wide Application Range. Losses of all types of insulation including shunt reactors under unstable power frequency can be measured.
  • Upgrade. Outdated Tettex bridge models (e.g. 2877, 2801, 2821, etc.) can be easily replaced, with existing cable sets.

Applicaitons:

  • Power Transformers
  • Distribution Transformers
  • Instrument Transformers
  • Rotating Machines
  • Liquid or Solid Insulations
  • Bushings
  • Cables
  • Circuit Breakers
  • Capacitors
  • Surge Arrestors
  • Shunt Reactors
  • Generators

Specifications:

TECHNICAL SPECIFICATIONS Range Max. Resolution Accuracy
Dissipation Factor (tan δ) 0 .. 100 1 x 10-5 &plsumn; 1 % rdg ± 1 x 10-4
Capacitance ≥ 1 pF 0.01 pF ± 0.1 % rdg ± 0.1 pF
Inductance ≤ 1000 kH 0.1 mH ± 0.2 % rdg ± 0.3 mH
Test Voltage >5V 1V ± 0.3 % rdg ± 1 V
Test Current @ Input Cn 20uA .. 300 mA 0.1 uA ± 0.3 % rdg ± 1 uA
Test Current @ Input Cx 20uA .. 15 A 0.1 uA ± 0.3 % rdg ± 1 uA
Test Frequency 15 .. 1000 Hz 0.01 Hz ± 0.1 % rdg ± 0.1 Hz
Apparent Power S ≥ 1 mVA 0.1 mVA ± 0.5 % rdg ± 1 mVA
Real Power P ≥ 1 mW 0.1 mW ± 0.5 % rdg ± 1 mW
Reactive Power Q ≥ 1 mvar 0.1 mvar ± 0.5 % rdg ± 1 mvar
Measuring Time 0.3 sec / measurement
Measuring Channels 2 (Cn & Cx)