Project Planning Information; Cable Selection; Star Electrodes - Honeywell krom schroeder IFD 258 Manual

7 Project planning information

7 .1 Cable selection

Use mains cable suitable for the type of operation and
complying with local regulations.
Signal and control line: max. 2.5 mm
Cable for burner ground/PE wire: 4 mm
Do not route IFD cables in the same cable duct as
frequency converter cables or other cables emitting
strong fields.
Ionization cable and ignition cable
Use unscreened high-voltage cable for both lines, see
page
34 (Accessories).
Recommended cable length:
Ionization cable – max. 75 m,
Ignition cable:
IFD 258: max. 5 m, recommended < 1 m (with TZI/TGI),
IFD 258..I: max. 1 m, recommended < 0.7 m.
The longer the ignition cable, the lower the ignition ca-
pacity.
Avoid external electrical interference.
Lay cables individually and not in a metal conduit, if
possible.
Lay the ignition cable and UV cable/ionization cable as
far apart as possible.
IFD 258 · Edition 03.12l
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Screw the ignition cable securely into the ignition trans-
former TGI/TZI and feed it out of the unit on the short-
est possible route (no loops).
Only use radio interference suppressed electrode
adapters (with 1 k resistor) for ignition electrodes, see
page 34 (Accessories).
2 .
2 .
UV cable
The UV cable should be no longer than 100 m and
should be laid as far as possible from the ignition cable.

7 .2 Star electrodes

We recommend using 7.5 kV ignition transformers on
burners with star electrodes.
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