Elenos T25000, Руководство пользователя

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Hand Book T25000 -
15
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transformer MUST be connected to the electrical earth of the unit, AT ONE POINT ONLY of its
body. Make absolutely certain that this earth conductor is connected to the earth terminal of the whole
T25000 unit. Do not connect the central node of the star of the transformer primary to the neutral of
the line supply. Connect the anode transformer primary to the intended, heavy-section cables with the
terminals best suited for high voltage operation (see the diagram for three-phase connection). Connect
the anode transformer secondary to the intended, heavily insulated cable (see identification labels).
Connect the two wires from the front, right-hand spar (see identification labels) to the thermal probe
socket of the anode transformer. WARNING! Malfunctions occuring during the first few hours of
operation are frequently caused by the passage of connection cables, using ordinary insulation, close to
parts of the anode transformer which present a risk. Take care to prevent loose cables from making
contact with the high voltage terminals of the anode transformer. The T25000 can be connected in two
ways to the line supply: star connection for line voltages of 380/415V with neutral connection (4 wire
+ earth); delta connection for line voltages of 208/240V without neutral connection (3wire + earth).
The entry for the main electrical supply cables is located on the rear of the unit where a series of holes
are available for the cables to enter. Inside the unit, near the two high-power contactors, a terminal
block is provided for the connection of the electrical supply cables. The section of the cables is
different for the two types of connection and can be determined from the technical table defining
values of current absorption of the line supply. Each country has its regulations concerning the section
of cable connected to the line supply which MUST be respected. In the absence of precise indications
the section of cable should allow for a current density of not greater than 4A per square millimetre of
conductor. (for example: a 50A current will require a cable of section of 50/4 = 12.5mm²). In the event
of a three phase star connection, do not swap the neutral line for any of the phases; this will do
permanent damage to the equipment. The neutral terminal can be readily identified by its label inside
the unit. For delta connection do not connect neutral to the terminal inside the unit; this has been
intentionally short-circuited to one of the three phases. IT IS ESSENTIAL THAT THE EQUIPMENT
IS CONNECTED TO THE EARTHING POINT of the system on site. Inside the unit is a terminal
which can be identified by its yellow/green colours; its dimension is the same as those of the three
phases. The earth connection is essential to ensure the safety of personnel who have occasion to make
physical contact with the apparatus or any mechanical structure or electrical conductor which are in
electrical contact with the apparatus. The earth connection is useful for minimising damage to the
equipment or other nearby equipment, in the event of high voltage discharges of an atmospheric
nature, or caused by the equipment itself. Connection to the three phases is NOT arbitrary and
determines the direction of rotation of the fan, which clearly must be correct. Testing for correct
rotation of the cooling fan must only be performed once the unit is fully closed to ensure operator
safety. The electrical supply system which supplies the unit and all other equipment with power,
MUST be fitted with a CIRCUIT BREAKER with a current calibration not greater than 30% of the
current drawn by the whole transmitter. When the equipment is connected to the electrical supply, it
exposes personnel to the risk of coming into contact with high voltage lines; for this reason it is
ABSOLUTELY ESSENTIAL THAT THE CIRCUIT BREAKER IS IN THE OFF POSITION, whilst
any equipment panel remains open. Maintaining the unit's on/off switch in the off position IS NOT