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Once the power supply is connected to the input of the UPS (with static bypass
included or with an independent static bypass line), although the inverter is “Off”
(shut-down), it does not mean that no output voltage is available at the output
terminals.
To do this, it is required to switch (Q1a), (Q4) and (Q2) to position “Off”. It is
possible that the UPS might be supplying output voltage from the manual bypass,
so this must be considered for the purpose of safety. If the output power supply of
the UPS has to be interrupted in this situation, deactivate the switch (Q5).
In devices with battery terminals, precautions must be taken as they are not
electrically insulated from the alternating input line, and there might be dangerous
voltage between the battery terminals and the ground.
4.1.1. BATTERY SAFETY INSTRUCTIONS
The manipulation and connection of the batteries shall be only be carried out and
supervised by personnel with battery knowledge.
For units requested without batteries, the acquisition, installation and connection
of the batteries will always be done by the customer and it is under his
responsibility. The relevant information on the batteries (number, capacity and
voltage) are indicated in the battery label pasted beside the nameplate of the
equipment. Strictly respect this data, the battery polarity connection and the
circuit diagram provided with this documentation.
The battery supply can involve the risk of electric shock and can produce high short
circuit current. Observe the following preventive measures before manipulating any
terminal block identified in the labeling as “Battery”:
• Disconnect the corresponding protection elements.
• When connecting a battery cabinet to the equipment, respect the cable’s
polarity and color (red-positive; black-negative) indicated in the manual and
in the corresponding labeling.
• Wear rubber gloves and shoes.
• Use tools with insulated handles.
• Removes watches, rings or other metal objects.
• Do not place metal tools or objects on the batteries.
• Never manipulate directly with your hands or through conducting objects, do
not short the battery terminal block or the battery enclosure.
• Never short the battery terminals as it involves a high risk. It may result in
damage to the equipment and batteries.