Code: Varlogic
Product name: Varlogic

The following precautions must be taken into account when installing and operating the controller

Safety
The following precautions must be taken into account when installing and operating the controller
• The installation of the controller must be performed by a qualified electrician
• Do not touch the connectors when the controller is energized, make sure that
the operating voltage is disconnected before touching any parts located on the
rear side of the controller
• Do not open a live current circuit, this may cause dangerous overvoltages. Always
short circuit the current transformer (CT) before replacing or removing the controller
installed in a bank.
• Do not open the controller casing, there are no user serviceable parts inside
For better understanding of the terminology used, please refer to the Glossary
(chapter 7) at the end of this manual.
Installation
The controller is designed for either panel (cut-out 138 x 138 mm) or DIN-rail installation. It is
locked to the rail by a screwdriver-operated fixing spring and to a panel by a side fitting spring.
There are two ways of connecting the controller to the network.
Voltage LN (Line – Neutral) (CT on the same line phase)
Voltage LL (Line – Line) (CT on the third phase)
Incorrect connections can be automatically corrected by the controller when Auto Setup is
selected from the main menu.