2. Ohmmeters for measuring insulation resistance
While the inspection of the dielectric strength of low-voltage electrical equipment prescribed by standard NF C 20-030: "Protection against electric shock", is reserved for the testing of new or refurbished equipment due to its destructive nature, the periodic monitoring of insulation resistance values during their operating periods is one of the bases for their preventive maintenance. The aforementioned standard specifies thresholds of 1 MΩ for Class I equipment and 7 MΩ for Class II equipment.
2.1 Main functional features
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Ohmmeters for measuring insulation resistance
Bibliography
References
Standardization
French standards (NF) AFNOR (Association française de normalisation)
- Installations électriques à basse tension. - NF C 15-100 - déc. 2002
- Travaux sous tension. Détecteurs de tension. Partie 5 : systèmes détecteurs de tension (VDS). Indice de classement C 18-310. - NF EN 61243-5 - juin 2002
- Degrés de protection...
Manufacturers
Chauvin-Arnoux http://www.chauvin-arnoux.com
French instrumentation http://www.distrame.fr
LEM (Experts in Measuring Electricity) http://www.lem.com
...
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