Vents VKV Series User Manual page 19

The recommended automatic circuit breaker rated current and the cable cross section for
various fan models are stated in the table on page 19.
The above cross sections are for reference only. The actual cross section depends on maxi-
mum permissible wire heating, its material, insulation, length and installation method (i.e.
overhead, in pipes or inside the walls).
The fans with EC motors are connected to power mains through the terminal block lo-
cated inside the remote or integrated terminal box in compliance with the wiring diagram
and the terminal designation, see page 23.
The terminal designations are shown on the label inside the terminal box.
The recommended wiring diagram with motor overheating protection is shown on page
20.
The TW1 and TW2 terminals are the electrical leads of the normally closed contact of the
motor overheating protection.
This contact must be connected in series to the power supply circuit of the KM1 magnetic
starter coil, which starts the motor after pressing the S1 button.
The contact is broken in case of motor overheating and it switches the starter coil off to cut
power supply to the motor off.
The QF automatic circuit breaker, KM1 magnetic starter, S1 and S2 control buttons are not
included in the delivery set and are designed to be installed by the user.
Fan model
VKV/VKH 2E 220...250
VKV/VKH 4E 310
VKV/VKH 2E 280
VKV/VKH 4E 355
VKV/VKH 4E 400...450
VKV/VKH 6E 500
VKV/VKH 4D 310...450
VKV/VKH 250...310 ЕС
VKV/VKH 355...450 ЕС
VKV/VKH 500...560 ЕС
VKMK/VKMKp 150...250
VKMK/VKMKp 315
VOK 2E, 4E 200...350
VOK1 200...315
Automatic circuit breaker
rated current [A]
1
1.6
4
2.5
1
4
2
10
1
2
1
1
Recommended cable, n x S, where n is a
number of the cable conductors and S is
the cable cross section [mm²]
3x0.5
3x0.5
3x1.0
3x1.0
5x0.5
3x1.0
5x0.75
5x1.5
3x0.5
3x0.5
3x0.5
3x0.5
19