Janitza AHF
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5.5 Installation of the current transformers
Switch off your installation before commencing work!
Check to be sure it is de-energized!
Ground the installation! Use the ground connection points with the ground symbol to
do so!
Consult the documentation for the current transformers!
NOTE
A CT can be installed on the load side (usually recommended) or on the grid side.
WARNING
Risk of injury due to large currents and high electrical voltage on the current trans-
formers!
• Current transformers operated while open on the secondary side (high voltage peaks
pose a hazard when touched) can result in severe bodily injury or death.
•
Avoid operating the current transformers while open; short circuit the unloaded
transformers!
•
Before interrupting the current supply, short circuit the secondary connections
of the current transformers. Switch any test switches that automatically short
circuit the secondary lines of the current transformers to the “Test” status
(Check the test switch/short circuiting connection beforehand)!
•
Only use current transformers with basic insulation to IEC 61010-1:2010!
•
Caution, even current transformers rated as safe for open operation can pose a
hazard when touched during operation while open!
•
Make sure that screw terminals for the current transformer connection on the
device are adequately tightened!
•
Comply with the information and provisions in the documentation of your current
transformers!
CAUTION
Risk of injury or damage to the device due to high measurement currents on the
connections of the current transformers!
High measurement currents can cause temperatures of up to 80 °C (176 °F) on the con-
nections of the current transformers
•
Use wiring that is designed for an operating temperature of at least 80 °C (176 °F)!
•
The current transformers can still be hot even after the power supply has been
switched off. Allow the connections of the current transformers and the connect-
ing cables to cool down before touching them!
