janitza UMG 801, Руководство пользователя, Страница: 42 / 106

UMG 801 www.janitza.de
42
7.7.2 Residual current transformer example
Operating equipment must have reinforced or
double insulation from supply circuits!
Example:
A residual current transformer is used to measure
on insulated mains wiring in a 300 V CAT III
network.
Solution:
Provide basic insulation for 300 V CAT III for
the insulation of the network wiring and the
insulation of the residual current transformer. This
corresponds to a test voltage of 1500 V AC (1 min.
duration) for the insulated network wiring and a
test voltage of 1500 V AC (1 min. duration) for the
residual current transformer.
7.7.3 Important information about the residu-
al current measuring inputs
CAUTION
Risk of injury or damage to the meter/your
system due to short circuit!
Inadequate insulation of the operating equipment
at the residual current measuring input with respect
to the supply circuits can cause voltages at the
measuring input which represent a hazard when
touched or damage to your device or system.
· Ensure reinforced or double insulation with
respect to the supply circuits.
· Isolate residual current measuring inputs
galvanically from each other and galvanically
from the supply voltage (24 V)!
INFORMATION
Ratios for the residual current transformer inputs
can be configured individually on the
meter or via the GridVis
®
network visualization
software.