Eigenschaften
Voltage warning indicator	Ja > 25 V
Dimensions / weight	270 x 250 x 180 mm / 4,3 kg

The Chauvin Arnoux insulation tester is a digital measuring instrument for quantitative and qualitative testing of insulation resistances in electrical installations. The device features a robust, site-suitable housing design and is designed for use under demanding conditions. It enables measurement of insulation resistances in the range of 10 kΩ to 10 TΩ, depending on the selected test voltage. The test voltage can be programmed in two ranges: from 40 V to 1000 V in steps of 10 V and from 1000 V to 5100 V in steps of 100 V. Four fixed test voltages are available by default: 500 V, 1000 V, 2500 V, and 5000 V. Measurement accuracy is ±5 % of the value ± 3 digits in the range from 1 kΩ to 400 GΩ and ±15 % of the value ± 10 digits in the range from 400 GΩ to 10 TΩ.

Applications
This device is used for testing insulation in electrical machines, cables, motors, generators, and transformers. It serves both qualitative assessment of insulation quality and quantitative measurement of insulation resistance. Applications include maintenance, servicing, and inspection of electrical installations, particularly in industrial electrical engineering and testing of high-voltage installations.

Functions and Equipment in Detail
The tester offers comprehensive functionality for insulation analysis. In addition to measuring insulation resistance, it also displays voltages, capacitances (0.005 to 49.99 μF), and leakage currents (0.001 nA to 3 mA). Measurement values can be programmed for a duration of 1 to 59 minutes. Automatic calculation of quality parameters DAR (dielectric absorption ratio), PI (polarization index), and DD (dielectric discharge index) enables detailed evaluation of insulation quality. Functions include programmable test duration, limiting test voltage to safe levels, a smoothing function for stabilizing measurements, and programmable alarms.

Technology Explained Simply
Measurement is performed by applying a test voltage to the object under test and measuring the resulting leakage current. The insulation resistance is calculated from the ratio of voltage to current. The smoothing function reduces measurement noise and ensures more stable readings. Quality parameters DAR, PI, and DD are calculated from sequential measurements over time to detect insulation aging. Testing with an increasing voltage ramp allows detection of insulation faults under increasing load.

Compatibility and Accessories
The device is compatible with various accessories, including HV test leads with crocodile clips in different lengths (3 m, 8 m, 15 m, 35 cm), simplified HV test leads, test probes with 4 mm socket (CAT IV and CAT III 1000 V), a carrying case, and a power cable. The test leads are equipped with insulated high-voltage crocodile clips to ensure secure contact. The leads are rated for a test voltage of 5 kV.

Installation and Mounting
Installation is performed by directly connecting the test leads to the test object. The crocodile clips allow for easy and secure contact. Power supply is via rechargeable NiMH batteries, which provide operation for approximately one month if 10 DAR and 5 PI measurements are performed daily. The device features a foldable carrying handle and a socket for mains connection and battery charging.

Operational Advantages
The device offers high measurement accuracy, extensive functionality, and a robust design. The large, backlit LCD display with bar graph enables clear presentation of measurement values. Storage of up to 20 measurement results and storage of the R(t) curve (4 kilobytes) support documentation and evaluation. The integrated voltage warning indicator (from 25 V) and test inhibition (adjustable depending on test voltage) enhance operational safety. Compliance with standards IEC 61010-1 CAT III 1000 V and CAT IV 600 V, as well as IEC 61557, ensures electrical safety. The housing is shock-resistant and sealed (IP 53), enabling use outdoors and under harsh conditions.

Power Supply and Operation
Power supply is via rechargeable NiMH batteries. The device can be charged via a power cable. Operating time is approximately one month with daily use of 10 DAR and 5 PI measurements. The display is large, backlit, and shows numerical values as well as a bar graph. Operation is via buttons that control the various functions.

Safety and Standards
The device complies with standards IEC 61010-1 CAT III 1000 V and CAT IV 600 V, as well as IEC 61557. Electrical safety is ensured, and the voltage warning indicator (from 25 V) and test inhibition enhance safety during operation. The housing is shock-resistant and sealed (IP 53), enabling use outdoors and under harsh conditions.

Dimensions and Weight
The device has dimensions of 270 x 250 x 180 mm and weighs 4.3 kg. The robust design and foldable carrying handle facilitate transport and storage.

Accessories and Extensions
Compatible accessories include various HV test leads with crocodile clips in different lengths, simplified HV test leads, test probes with 4 mm socket (CAT IV and CAT III 1000 V), a carrying case, and a power cable. The test leads are rated for a test voltage of 5 kV and feature insulated high-voltage crocodile clips.

Practical Applications
The device is used in industrial electrical engineering, for servicing electrical installations, and for testing high-voltage installations. Detailed evaluation of insulation quality enables preventive maintenance and early detection of insulation faults. Storage and documentation of measurement results support quality assurance and traceability of inspections.

Accessories
Compatible accessories include various HV test leads with crocodile clips in different lengths (3 m, 8 m, 15 m, 35 cm), simplified HV test leads, test probes with 4 mm socket (CAT IV and CAT III 1000 V), a carrying case, and a power cable. The test leads are rated for a test voltage of 5 kV and feature insulated high-voltage crocodile clips.

Safety
The device complies with standards IEC 61010-1 CAT III 1000 V and CAT IV 600 V, as well as IEC 61557. Electrical safety is ensured, and the voltage warning indicator (from 25 V) and test inhibition enhance safety during operation. The housing is shock-resistant and sealed (IP 53), enabling use outdoors and under harsh conditions.

Dimensions and Weight
The device has dimensions of 270 x 250 x 180 mm and weighs 4.3 kg. The robust design and foldable carrying handle facilitate transport and storage.

Accessories and Extensions
Compatible accessories include various HV test leads with crocodile clips in different lengths, simplified HV test leads, test probes with 4 mm socket (CAT IV and CAT III 1000 V), a carrying case, and a power cable. The test leads are rated for a test voltage of 5 kV and feature insulated high-voltage crocodile clips.

Practical Applications
The device is used in industrial electrical engineering, for servicing electrical installations, and for testing high-voltage installations. Detailed evaluation of insulation quality enables preventive maintenance and early detection of insulation faults. Storage and documentation of measurement results support quality assurance and traceability of inspections.