PDMM-10
13
Overvoltage Installation Categories
These definitions were derived from the international safety
standard for insulation coordination as it applies to measurement,
control, and laboratory equipment. These overvoltage categories
are explained in more detail by the International Electrotechnical
Commission; refer to either of their publications: IEC 1010-1 or
IEC 60664.
Overvoltage Category I
Signal level. Electronic and telecommunication equipment, or parts
thereof. Some examples include transient-protected electronic
circuits inside photocopiers and modems.
Overvoltage Category II
Local level. Appliances, portable equipment, and the circuits they
are plugged into. Some examples include light fixtures, televisions,
and long branch circuits.
Overvoltage Category III
Distribution level. Permanently installed machines and the circuits
they are hard-wired to. Some examples include conveyor systems
and the main circuit breaker panels of a building’s electrical
system.
Overvoltage Category IV
Primary supply level. Overhead lines and other cable systems.
Some examples include cables, meters, transformers, and other
exterior equipment owned by the power utility.
Содержание PDMM-10
Страница 9: ...PDMM 10 9 Typical Measurements Voltage Measurement Current Measurement ...
Страница 10: ...10 Resistance Measurement Continuity Check Typical Measurements ...
Страница 11: ...PDMM 10 11 Diode Measurement Typical Measurements Reverse Bias Forward Bias Red Probe ...
Страница 16: ...16 Greenlee Textron Subsidiary of Textron Inc 4455 Boeing Dr Rockford IL 61109 2988 815 397 7070 ...
Страница 24: ...24 Mediciones más comunes Medición de tensión Medición de corriente ...
Страница 25: ...PDMM 10 25 Medición de resistencia Verificación de continuidad Mediciones más comunes ...
Страница 26: ...26 Verificación de diodo Mediciones más comunes Polarización inversa Polarización directa Sonda roja ...
Страница 31: ...PDMM 10 31 Greenlee Textron Subsidiary of Textron Inc 4455 Boeing Dr Rockford IL 61109 2988 815 397 7070 ...
Страница 32: ...32 Greenlee Textron Subsidiary of Textron Inc 4455 Boeing Dr Rockford IL 61109 2988 815 397 7070 ...
Страница 40: ...40 Mesures types Mesure de la tension Mesure du courant ...
Страница 41: ...PDMM 10 41 Mesure de la résistance Vérification de la continuité Mesures types ...
Страница 42: ...42 Mesure des diodes Mesures types Polarisation inverse Polarisation directe Sonde rouge ...
Страница 47: ...PDMM 10 47 Greenlee Textron Subsidiary of Textron Inc 4455 Boeing Dr Rockford IL 61109 2988 815 397 7070 ...