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

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, focused on convenience with built-in useful programs (e.g. support tool for tuning the external high-voltage supply) and uses a large color touch screen as the input device.

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 Outdated Tettex bridge models (e.g. 2877, 2801, 2821, etc.)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.

Product Info

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)

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

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