Salicru EMi3 M 5-2 Manuel D'utilisateur page 66

5.3. CONNECTION.
This equipment is ready to be installed in mains with
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power distribution system TT, TN-S, TN-C or IT, keeping
in mind during the installation the features of the used system
and the national electrical system of the final country.
The cross cable sections used to supply the equip-
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ment and loads, will be in accordance with the
power stated in the nameplate sticked in the equipment,
respecting the Low Voltage Electrotechnical Regulation or
norms of the corresponding country.
The installation will be provided with input protections,
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RCD and circuit breakers sized to the current stated in the
nameplate of the equipment at least, and characteristic
equal to the stated figure in the «Recommended installa-
tion» document.
For equipments connected to IT distribution power system,
the protection will be four poles in order to break the lines
and neutral in the same manoeuvring.
Overload condition is considered as a nonpermanent and
exceptional operating mode, so these currents will not be
kept in mind when sizing the protection.
The output protection will be a circuit breaker with the
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characteristic equal to the stated figure in the «Recom-
mended installation» document.
Depending on the model of the stabilizer, some control con-
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nections can be accessible from the rear of the equipment.
Nevertheless any power connection is protected by a cover
and those models in cabinet, it is needed to open the door too.
When the corresponding tasks are finished, the terminal
cover will be put back together with their fixing screws and
those models in cabinet and front door, the door will be
closed by means of the foreseen mechanisms.
It is recommended to use spade terminals in all the cables
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connected to terminals.
Check the correct torque of terminal screws.
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5.3.1. Connection of input terminals.
As this is an equipment with class I protection against
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electrical shocks, it is essential to install the protection
earth conductor (connect earth
before supplying voltage to the input terminals.
In three phase stabilizers consisting of single phase equip-
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ments, it is needed and essential to make one of these two
options as regards to the earth:
Joint the earth terminals (screws) (X5) of the three
ˆ
equipments by means of the cable and connect the pro-
tective earth cable coming from the installation to any
of the terminals (X5).
Or come with one separate earth cable to each terminal
ˆ
(screw) (X5) of each equipment, but they have to come
from the same point.
66
). Connect this conductor,
Depending on the model of stabilizer, the power supply con-
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nections are directly done to the terminals or to the own
rods of the input switch or breaker.
The illustrations corresponding to models in cabinet (Fig. 4
to 11), are shown with direct connection over the manoeu-
vring mechanism as a mere example.
Models with no terminals, the connection order will not
differ from the one stated in Fig. 4 to 11, unless the label-
ling of the equipment states it.
Connect the power supply cables to input terminals (X1)
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and (X4) in single phase equipments or (X1), (X2), (X3) and
(X4) in three phase equipments, by respecting the phase
rotation R or R-S-T and neutral N stated in the labelling
of the equipment and this manual. If this sequence is not
respected, serious damages will occur in the equipment.
In three phase equipments with delta connection, the neu-
tral terminal (X4) is not available.
In three phase stabilizers consisting of three single phase cabi-
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nets, in case it was requested to have one single point to con-
nect the neutral, joint the neutral rod of the three equipments
by means of the two extensions copper rods (PT). Otherwise
connect the suitable cross cable section to the three terminals
(X4) corresponding to the neutral of each equipment.
When it is not a conditioning (only one conductor), it is able
to connect a suitable cross cable section to the input neu-
tral terminal (X4) of each equipment.
In case of discrepancies between the labelling and the instruc-
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tions of this manual, the labelling will always prevail.
5.3.2. Connection of output terminals.
As this is an equipment with class I protection against
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electrical shocks, it is essential to install the protection
earth conductor (connect earth
before supplying voltage to the input terminals.
Depending on the model of stabilizer, the load or loads con-
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nections are directly done to the terminals or to the own
rods of the manual switch option, if it is included.
The illustrations corresponding to models in cabinet (Fig. 4 to
11), are shown with direct connection over the manual bypass
manoeuvring mechanism as a mere example. For those models
without this option, there will always be a terminal strip.
Models with no terminals, the connection order will not
differ from the one stated in Fig. 4 to 11, unless the label-
ling of the equipment states it.
Connect the cables to supply the loads or loads to the
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output terminals (X6) and (X9) in single phase equipments
or (X6), (X7), (X8) and (X9) in three phase equipments, by
respecting the phase rotation U or U-V-W and neutral N
stated in the labelling of the equipment and this manual.
Pay attention to the neutral connection in a three phase
unit with star configuration, because if the line is con-
nected instead of the neutral, the load will suffer a high
over voltage that can destroy it.
In three phase equipments with delta output, the neutral
terminal (X9) is not available.
). Connect this conductor,
SALICRU