6 Specifications and Characteristics
92 U3402A User’s and Service Guide
Measurement Category
The U3402A is intended to be used for measurement under Measurement
Category II, 300 V for altitude up to 2000 m.
Measurement Category Definitions
Measurement CAT I Measurements performed on circuits that are not directly
connected to MAINS.
For example, measurements on circuits that are not derived
from MAINS, and specifically protected (internal)
mains- derived circuits.
Measurement CAT II Measurements performed on circuits that are directly
connected to the low voltage installation.
For example, measurements on household appliances,
portable tools, and similar equipment.
Measurement CAT III Measurements performed in fixed building installation.
For example, measurements on distribution boards, circuit
breakers, wiring (including cables), bus bars, junction boxes,
switches, socket outlets in fixed installation, equipment for
industrial use, and stationary motors with permanent
connections to fixed installation.
Measurement CAT IV Measurements performed at the source of the low voltage
installation.
For example, electricity meters, measurements on primary
overcurrent protection devices, and ripple control units.
U3402-90001.book Page 92 Friday, July 24, 2009 4:04 PM
Downloaded from Elcodis.com electronic components distributor
To Next Page
Loading...
Need help?
General
