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Box/Box-I/Box-f/Box-fI
13
CONNECTION TO POWER MAINS
DISCONNECT THE POWER SUPPLY PRIOR TO ANY OPERATIONS WITH THE UNIT.
CONNECTION OF THE UNIT TO POWER MAINS IS ALLOWED BY A QUALIFIED
ELECTRICIAN WITH A WORK PERMIT FOR THE ELECTRIC UNITS UP TO 1000 V AFTER
CAREFUL READING OF THE PRESENT USER’S MANUAL.
THE RATED ELECTRICAL PARAMETERS OF THE UNIT ARE GIVEN ON THE
MANUFACTURER’S LABEL.
Depending on the fan type it is rated for connection either to single-phase AC 230 V/50/60 Hz or three-phase AC 380-400 V/50/60 Hz
power mains.
The connection must be made using durable, insulated and heat-resistant conductors (cables, wires).
The external lead-in must be equipped with a circuit breaker built into the stationary wiring to disconnect all the mains phases.
The QF external circuit breaker location must ensure free access for quick shutdown of the fan.
The trip current must be in compliance with current consumption.
The recommended rated current of the circuit beaker and the conductor cross section for various types of fans are shown in the table.
The given conductor cross sections are for reference only.
The actual conductor cross–section selection must be based on its type, the maximum permissible heating, insulation, length and
installation method (in the air, pipes or inside walls).
The recommended type of circuit breakers is D or C, but with replacement to D or to a higher rating in case of tripping because of
frequent start-ups.
The recommended circuit breaker rated current and conductor cross section
Model
Rated current of the circuit breaker
Recommended cable, n x S, where n is the
number of wires, and S is the cross section
in mm
2
Box, Box-I 40x20 2E
3
3 x 0.75
Box, Box-I 50x25 2E
6
3 x 0.75
Box, Box-I 50x30 4E
2
3 x 0.75
Box, Box-I 50x30 4D
2
5 x 0.75
Box, Box-I 60x30 4E
4
5 x 0.75
Box, Box-I 60x30 4D
2
5 x 0.75
Box, Box-I 60x35 4E
10
3 x 1
Box, Box-I 60x35 4D
4
5 x 0.75
Box 100x50 4D
20
5 x 1.5
Box-F, Box-FI 40x20 4E
4
3 x 0.75
Box-F, Box-FI 40x20 4D
2
5 x 0.75
Box-F, Box-FI 50x25 4E
10
3 x 1
Box-F, Box-FI 50x25 4D
4
5 x 0.75
Box-F, Box-FI 50x30 4E
4
3 x 0.75
Box-F, Box-FI 50x30 4D
2
5 x 0.75
Box-F, Box-FI 60x30 4E
10
3 x 1.5
Box-F, Box-FI 60x30 4D
6
5 x 0.75
Box-F, Box-FI 60x35 4E
6
3 x 2.5
Box-F, Box-FI 60x35 4D
3
5 x 1.0
Box-F, Box-FI 70x40 4D
20
5 x 1.5
Box-F, Box-FI 80x50 4D
10
5 x 1.5
Box-F, Box-FI 80x50 6D
10
5 x 1.0
Box-F, Box-FI 90x50 6D
3
5 x 1.5
Box-F, Box-FI 10x50 6D
40
5 x 2.5
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