Read This First - ABB QCap Installation, Inbetriebnahme Und Wartungsanleitung

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Before installation, read this notice carefully and keep it at
disposal of people in charge of installation, maintenance
and operation.

Read this first

Safety
WARNING! Wait 5 min. after isolating supply before
handling.
For a safe use of QCap capacitor units, please ensure
− Installation and maintenance are undertaken only
by authorized and qualified personnel, in ac-
cordance with current local regulations;
− Isolate the equipment from the supply before att-
empting to gain access.
The QCap will disconnect itself from load by a built-
in overpressure disconnector in case of failures. This
overpressure disconnector will break all three wires
connected to the load through the expansion of the
QCap lid. The overpressure disconnection works properly
only under service conditions specified in this manual and
IEC60831. QCap could end its life with an unexpected
way under excessive current and voltage stress compa-
red to its normal overcurrent and overvoltage capacity.
Inspection on reception
Unpack the QCap unit and check that:
− data on the label correspond to those of your
purchase order and local regulations;
− the QCap unit is not damaged;
− the QCap enclosure is hermetic. If any damage is
found on the QCap, which could compromise the
hermetic enclosure, such capacitor must not be
used any more.
Any loss or damage should be notified immediately to
your closest ABB agent.
Storage
Indoor, in dry, dust free and non-corrosive environments,
protected from vibrations or shocks.
Storage temperature: minimum: -40°C/-40°F, maximum:
75°C/167°F.
Transportation and handling
During transportation and handling, care must be taken
to ensure the tightness of the hermetic enclosure remains
intact.
WARNING! Failure to respect the installation rules may
lead to premature failure, other material damage to instal-
lations or bodily injury.
Installation
Applicable standards
IEC 60831 Parts 1 and 2. Current local regulations.
Protection
The QCap is an IP20 protected capacitor unit.
2 English | ABB QCap manual
Installation and use
Indoor installation on firm foundation or fixed on a rigid
plate/frame in well-ventilated situations where the ambi-
ent temperature does not exceed 35°C/95°F over one
year, 45°C/113°F over 24 hours and 55°C/131°F (accor-
ding to IEC 60831 Parts 1 and 2 for a -25/D temperature
category product).
WARNING! The ambient temperature for capacitors
inside a cubicle is the temperature around the capacitors
and not around the cubicle.
WARNING! Like other standard capacitor units, QCap
discharge devices are not suitable for use with electronic
based rapid switching rates (typically. less than 5 sec.).
Additional external resistors are not a solution for such
cases. Only specially designed capacitors must be used
in such applications.
Vertical and horizontal mounting
The QCap capacitors must be fixed in such a way as to
ensure a natural airflow between QCap units.
In case of vertical mounting, use a punched mounting
plate or support bars to allow free airflow around capaci-
tors units (Fig. #1 and 2). A minimum spacing of 30 mm
between units is required.
In case of horizontal mounting, install so that the natural
airflow goes through the units (Fig. #2).
A minimum space of 20mm above the terminals must be
available to allow the cover and terminals to expand at
the end of the life of the QCap.(Fig. #3).
Installation in a cubicle
When the capacitors are installed in a cubicle the compo-
nents should be placed in such a way as to optimize the
cooling. Do preferably place devices with high heat dis-
sipation above the capacitors to avoid overheating them.
When reactors are used they should be placed in such
a way that they do not radiate heat directly on the capa-
citors. A partition is usually recommended. Reactors do
in general dissipate much heat, so their thermal impact
through convection must also be taken into account.
1. Natural air circulation
The difference in height between air inlet and air outlet
should be large in order to improve the air circulation. The
airflow should be channelled in such a way as to well cool
the hottest spots in the cubicle. Air should flow from the
bottom to the top of the cubicle (Fig. #4). The cross-
section of the top air outlet should be at least equal to
1.2 times the cross-section of the bottom air inlet. For
an example of a proper horizontal mounting of the QCap
capacitors inside a cubicle, please refer to Fig. #4.
2. Forced ventilation
Forced cooling using a fan is sometimes required (Fig.
#4). Please refer to the following recommendations:
− Consider the maximum ambient temperature of the
installation site including the heating effect of the
capacitor installation itself.