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One electrical company and a generator, ...
• The installation will have input protections sized to the currents of
the eq
uipment and stated in the nameplate label. (RCD devices
type B and circuit breakers with C characteristic or any other
equivalent one).
For equipment with three phase input, and connected to an IT
distribution system, the protection will be with four poles in order
to break the three phases and neutral in the same maneuvering.
Overload conditions are considered as a non-permanent and
exceptional operating mode, so these currents will not be kept in
mind when sizing the protections.
• Do not overload the UPS by connecting loads with inrush
consumptions at its output, i.e. laser printers.
• Installations with redundant equipment or separate bypass line,
there will be one and common RCD device only of 300 to
500mA for both lines at the beginning of the installation.
• It is recommended to distribute the output power into four lines at
minimum. Each one of them will have a protection circuit
breaker sized to the quarter of the nominal power. This kind of
outgoing distributions will allow any fault that makes a short
circuit in any device connected to the equipment to be affected to
the line with the failure only. Power supply will be guaranteed to
the rest of connected loads, because of the tripping of the
affected line by the short-circuit only.
• Under any concept the input power cables will be connected to
the output of the equipment, either directly or indirectly through
other outlets.
•
When supplying input voltage to a UPS with static bypass
or separate bypass line, if the inverter is in «Off» (shutdown)
mode, it doesn’t mean no voltage at the output terminals.
To set no voltage, input and static bypass switches have to be turned
«Off».
Put warnings labels and/or emergency switches in the particular
installation if the safety norms require it.
•
It is possible that the UPS supplies output voltage through the
manual bypass to those equipment through either standard or
optional mode under the consideration of safety.
If it is necessary to break the output supply of the equipment under
this situation, turn off the outgoing distribution protection or lack it, and
turn off the general protection of the distribution panel that feeds the
UPS.
• All the equipment have two auxiliary terminals to install an
external emergency power off button (EPO), which will belong to
the end-user.
EPO doesn’t affect the power supply of the equipment, but it only
breaks the power supply to the loads as a safety measure.
• RACK mounted equipment are destined to be installed in a predetermined
setting and to be done by professionals.
Its installation has to be designed and executed by qualified
personnel, who will be responsible for applying the safety
and EMC regulations and standards controlling the
particular installations and the place where the product is
destined.
2.2.3. Safety warnings regarding batteries.
•
The manipulation and connection of the batteries shall
be done and supervised by
personnel with battery
knowledge
only.
If Battery circuit is not isolated from input voltage, it is
dangerous to touch any part of the batteries. Dangerous
voltages can be found between the terminals of the battery set
and the earth. Check if there is any voltage at the input before
taking any action over them.
• Before doing any action inside the UPS, disconnect the batteries.
Check that no voltage is present and there is not potential danger in
the DC BUS (capacitors) or in the endpoint of the battery set terminals.
• In equipment with separate battery cabinet, check if they are
compatible before connecting them.
• When faulty batteries are found, the complete battery set has
to be replaced. But with few exceptional cases in new
equipment due to manufacturing faults, it will only be replaced
the defective ones.
The replacement should be conducted with another battery in
same type, voltage, capacity, quantity and the same brand.
Otherwise there is a risk of explosion.
• Do not reuse faulty batteries. There could be a risk of
explosion or burst in any battery with the involved problems
and issues.
• Generally supplied batteries are installed in the same cabinet,
case or rack of the equipment. Depending on the power,
autonomy or both, they can be supplied separately from the
equipment in another cabinet, case or rack, with the interlink
cables among them. Do not modify its length.
• In those equipment without batteries, their acquisition, installation
and connection will be done by the end-user and it should be
under his/her responsibility
. Information about the batteries
as regards to quantity, capacity and voltage, is stated in the
battery label stuck beside the nameplate of the equipment.
Respect
these data, battery connection polarity and the
supplied circuit diagram strictly.
For an optimum and efficient operation, the battery set has to
be located as close to the equipment as possible.
•
Battery voltage can involve the risk of electric shock and
can produce high short-circuited currents. Observe the
following preventive measures before manipulating any
terminal block identified in the labelling as «Batteries»:
Use the suitable IPE (Individual Protection Equipment): gloves
and insulated shoes, protection glasses, suitable work clothes,
and etc.
Take off rings, bracelets or other metal hanging objects.
Use tools with insulated handles.
Disconnect the corresponding protection elements.
When connecting a battery cabinet to the UPS, respect the
polarity and color of the cables (red-positive; black-negative)
indicated in the manual and labelling.
Do not place metal tools or objects ove
r the batteries.
