Description
Overview
The Chauvin Arnoux CA6550 is a professional, programmable insulation tester (megohmmeter) designed for high-voltage insulation integrity verification. It supports test voltages from 40 V up to 10 kV, and measures insulation resistance over a range from 10 kΩ to 25 TΩ, making it suitable for demanding electrical installation tests, preventive maintenance, quality assurance, and troubleshooting. Constructed with a robust, site-proof casing and carrying features that enable both field and laboratory usage, CA6550 is engineered to deliver reliable, reproducible results even under challenging environmental conditions.
Key Features
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Measurement of insulation resistance from 10 kΩ to 25 TΩ at 10 kV fixed test voltage, enabling detection of very high insulation levels.
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Wide range of test voltages: fixed & programmable, 40 V up to 10 kV, with fine increments in low and high ranges.
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Multiple test modes including fixed voltage, step voltage, ramp voltage, also special modes “burning”, “early-break”, and I-limit, useful for non-destructive testing and ageing diagnostics.
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Advanced ratio diagnostics: Polarization Index (PI), Dielectric Absorption Ratio (DAR), Dielectric Discharge (DD), and ΔR (ppm/V) allow assessment of insulation condition and ageing.
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Real-time display of test curves: R(t)+U(t), I(t), I(U) graphs displayed on a large, backlit, graphic LCD for immediate insight into insulation behaviour.
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Several digital filters for enhanced stability in measurement when noise or interference is present.
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Ability to compute and display resistance at a reference temperature, compensating for ambient temperature variations.
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Large internal memory (≈80,000 test records) with date/time stamping; DataView software support to transfer, analyse and generate reports.
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USB communication via an optically-isolated port, maintaining safety during data transfer.
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NiMH rechargeable battery with ability to operate also on mains; ensures mobile or remote usage.
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Robust safety and compliance: meets IEC 61557-1 & -2, IEC 61010 safety standards; CAT IV 1000 V rating for accessories; protective, IP54 rated enclosure.
Applications
The CA6550 is ideal for electrical engineers, maintenance and inspection teams, and procurement specialists working in:
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Rotating machinery (motors, generators) especially when rated at or above 12 kV.
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Medium and high voltage transformer and cable insulation testing.
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Power Transmission & Distribution (T&D) network maintenance: overhead lines, underground cables, substations.
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Surge suppressors, spark arresters, insulated transducers, high-voltage generator systems.
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Manufacturing quality control of electrical equipment where insulation integrity is critical.
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Preventive maintenance programmes where trending of insulation resistance (via PI, DAR, DD) is essential to predict degradation.
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Field service and commissioning work: site-proof design permits onsite inspections and commissioning in harsh environments.
Technical Specifications
| Parameter | Value |
|---|---|
| Insulation Resistance Range | 10 kΩ to 25 TΩ @ 10 kV fixed voltage |
| Test Voltage Range | Fixed: 500 V / 1,000 V / 2,500 V / 5,000 V / 10,000 V; Variable: 40 V up to 10,000 V, with fine increments (40-1,000 V in 10 V steps, above 1 kV in 100 V steps) |
| Charging Current | Up to 5 mA |
| Test Modes | Fixed Voltage, Ramp, Step, Burning, Early-Break, I-Limit |
| Diagnostic Ratios | PI, DAR, DD, ΔR (ppm/V) |
| Graphical Display | R(t)+U(t), I(t), I(U) curves on large backlit LCD |
| Filters | Three selectable digital filters for measurement stability |
| Reference Temperature Compensation | Yes |
| Memory Capacity | Approximately 80,000 measurement records with date/time stamps |
| Communications | Optically-isolated USB (for PC, DataView software) |
| Power Supply | NiMH rechargeable battery; mains charger included |
| Safety & Standards | IEC 61557-1 & -2 compliant; IEC 61010; Accessories CAT IV 1000 V; IP54 rating |
| Dimensions (L × W × H) | ~ 406 × 330 × 174 mm |
| Weight | ~ 6 kg |
