Tekon 560 - Measurement Range (over Voltage Range) Definition

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1.2. Measurement Range (Over voltage range) definition
Higher Category indicates Higher Over Voltage Electric environment. Tester
designed for CAT III environment can withstand higher voltage than the tester
designed for CAT II
To avoid any serious accident while measurement, better to use Tester higher
category for the testing environment. For example, do not use Tester with CAT at
testing environment CAT II, III, or IV
Category
Description
CAT I
2
nd
electric circuit connecting Transformer
example : protected electric circuit
CAT II
Basic circuit of things which electric code is connected to AC
consent /Outlet.
example : equipments, portable tool, home apparatus etc.
CAT III
Electric circuit of fixed facilities which directly connected to Consent
and distribution board / Switching board.
example : fixed facility Switch or industrial equipment firmly
connected to fixed facility
CAT IV
Electric circuit from Entrance to Overvoltage protection system
(Distribution board/Switch board ) and Wattage Meter
Example : Electric meter and primary Over- current protector