Modifications reserved
5.4.1 Input connections
BEFORE PROCEEDING READ THE CHAPTER ELECTRICAL INSTALLATION
(CHAPTER 5.4) AND ENSURE BEFORE STARTING CONNECTING THE
CABLE TO THE UPS THAT:
TO ENSURE CORRECT OPERATION OF THE UPS, THE VOLTAGE TOTAL
HARMONIC DISTORTION (THDU) OF THE MAINS SHALL NOT EXCEED THE
75% ACCORDING TO THE LEVELS OF THE STANDARD IEC 61000-2-2. IN
CASE OF EXCEEDING THE INDICATED VALUES, PLEASE CONTACT THE
MANUFACTURER
• Mains voltage (INPUT VOLTS) and frequency (FREQUENCY) correspond to the values indicated
on the ups nameplate.
• Earth connection is performed in accordance with the prescribed IEC Standards or with local
regulations.
• The UPS is connected to the mains through a low-voltage (LV) distribution board with a separate
mains line (protected with a circuit breaker or fuse) for the UPS.
Provide input fuses and cables according to chapter 5.7.1 or in accordance with the prescribed IEC
standards or with the local regulations.
The input of the UPS must be fitted with circuit breakers or some other kind of protection. The circuit
breakers will be connected between the mains supply and the UPS and will provide additional
protection to the UPS in the event of overloads and short circuits.
5.4.1.1 Mains supply and earth connection
To ensure protection of personnel during the installation of the UPS make sure that the connections
are performed under the following conditions:
• No mains voltage is present
• All loads are shut down and disconnected
• The UPS is shut down and voltage-free
• The UPS module is fitted in its correct position
• Maintenance bypass IA1 is open and in the OFF position
• The UPS terminal cover is removed
• First connect the earthing wire coming from the low-voltage distribution board to the terminal
"PE"
• Connect the input power cable coming from the low-voltage distribution board to the terminals
of the UPS, as shown in chapter 5.7.1
• Keep the phase rotation in a clockwise sense
INPUT NEUTRAL IS REQUIRED TO OPERATE THE RECTIFIER
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