Studer VarioString VS-120, Руководство пользователя

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Studer Innotec SA
VarioString
20 V 2.3 User manual
4.3.8 Extension of an existing installation
In interconnected installations, if the software is compatible, it is possible to extend an existing
installation by adding one or several (up to 15) VarioString units in parallel.
4.4 E
ARTHING
The VarioString is a Class I protection equipment,
its metal case must be earthed by means of the
grounding screw, included for that purpose.
= protective earth (connected to the
enclosure of the equipment).
The solar generator (as well as its wiring) must be
Class II isolated.
The cross-section of the earthed cable must not be
less than 16mm
2
.
In any case, the protective earth must be connected in accordance with local standards and regulations
in force. The protective earth of the equipment must at least be connected to the earthed ground of all
the Class I equipment after and before the VarioString (equipotential connection). The information, notes,
recommendations and diagrams reported in this manual are subject to local installation rules. The installer
is responsible for the conformity of the installation with the local standards in force.
4.4.1 Detecting an earthing fault
The choice of earthing system for the DC circuit is an important factor for the individuals' safety. Once
the decision is made the VarioString can check the continuity of the earth connection.
In case of failure of this connection, the LED (3) (see sect. 6) lights up indicating the fault. A permanent
message (requiring a validation) is displayed on the RCC if present.
The parameters {14040}, {14041} and {14042} allow establishing the type of control to be carried out
or the absence of control as set by default.
If a VarioString is connected to another compatible device (Xtender, VarioTrack, VarioString,
BSP, RCC, Xcom) with the same communication bus, it is highly recommended to make a
software update of all components in the system in order to guarantee all functionalities.
During the commissioning of the equipment in a multi-unit configuration, the system checks
automatically the compatibility of the software versions and may prevent the operation in
case of incompatibility. An upgrade of the installation must then be carried out by means
of the RCC-02/03 remote control using the latest manufacturer's software version (read the
user manual for the control and monitoring unit RCC-02/03 to carry out this operation).
The whole solar system must be installed according to protection class II.