Vapac VapaNet LFE Series, Руководство по установке и эксплуатации

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7
1.4 Electrical Connections
Transformer supply 230 volts single phase and
natural 50 or 60 Hz supply
1.4.1 Important E.M.C. Considerations
Use a dedicated, earthed metal conduit for both the
control signal cable and the security circuit cables
along their entire length - they may share the same
conduit where practicable. The earth must be made
by "metal-to-metal" contact and should be a good RF
(Radio Frequency) earth.
The control and security circuit connections should be
run in screened cable with the screen grounded at the
VAPANET end (onto the electrical section back
panel). The screen should be maintained as close as
possible to the cable ends and any tail between the
screen and the earth point must be kept short (50 mm
maximum).
Control Cable / Security Circuit
Conduit Entry Arrangement
Control Cable / Security Circuit
Screening Arrangement
Tail to be kept short
(less than 50mm)
Cables to control terminals
Screen left intact
Outer insulation
Earthed back panel
Note:
24 V a.c. Control Circuit -
Transformer Primary Circuit -
3.15 A 20 mm (T – Time Lag) fuse (Pt. N
o
. 1080096) mounted on VAPANET
Echelon PCB (Pt. N
o
.1150655).
There is one control fuse which protects the transformer primary circiut F1 2.0A
(slow blow) (Pt. No. 1080095) mounted in fuse-terminal holder on the main
terminal rail; this fuse protects transformer primary supply the transformer
secondary feeds the Fan and the 24 volts control to the PCB board. The
transformer has the following auto winding tappings for the fan supply.
Auto wind voltage are -5v, 160, 170, 180.190,200, 210, 220 and 230 Volts
All metal surfaces which come
into contact with each other,
must be free of paint, grease,
dirt, etc., thereby ensuring a
good low impedance R.F.
(Radio Frequency) path to
ground.
Electrical section metalwork
Metal conduit