MA130-en-GB_V1.0 10/16
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PER IEC1010 OVERVOLTAGE INSTALLATION
CATEGORY
OVERVOLTAGE CATEGORY I
Equipment of OVERVOLT AGE CATEGORY I is equipment for
connection to circuits in which measures are taken to limit the
transient over-voltages to an appropriate low level.
Note – Examples include protected electronic circuits.
OVERVOLTAGE CATEGORY II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming
equipment to be supplied from the fixed installation.
Note – Examples include household, office, and laboratory
appliances.
OVERVOLTAGE CATEGORY III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed
installations.
Note – Examples include switches in the fixed installation and
some equipment for industrial use with permanent connection to
the fixed installation.
OVERVOLTAGE CATEGORY IV
Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin
of the installation.
Note – Examples include electricity meters and primary over-
current protection equipment
Meter Description
1.
Clamp Jaw
2.
Protective barrier
3.
Clamp jaw trigger
open/close
4.
Range selection
switch
5.
Hold button
6.
MAX button
7.
Backlight button
8.
LCD display
9.
Indicator for
geometric center
of clamp head
Note: Battery
compartment is located on back of meter
.
