Miyachi Amada ISQ20 Series, Руководство по эксплуатации

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ISQ20
Commissioning
76609605EN-ISQ20-V1.2.docx 38/63
5.2.2 Connecting Secondary Cables
Use secondary cables with 95 mm² cross-
section and a length of at least 500 mm.
Use M8 x 16 mm fixing screws.

Connect one secondary cable with the
(+) pole of the ISQ20 (resp. the
transformer) and the active electrode
(at the corresponding connection
behind the current band on the welding
head).

Connect the other secondary cable to
the (-) pole of the ISQ20 (resp. the
transformer) and the corresponding
connection on the holder of the passive
electrode.
Fig. 8: Secondary cable connection
ISQ20-3/ISQ20-6
Please ensure the following to maintain as low a current resistance in the secondary
circuit as possible:

The cable lugs should make contact with the mounted component over as great a
surface area as possible

Secondary cables should be laid as closely as possible and bound with cable ties to
maintain a limited secondary window

Secondary cables should not be in contact with other conducting parts and should
not form shunt circuits

Contact surfaces should be clean

Contact surfaces should not be corroded

Screw connections should not loosen during operation
Attention
The attachment of a second (third) secondary cable to each pole increases the cable
cross section, thus reducing the current resistance. The shorter the secondary cable, the
lower the conducting loss.
A considerable loss should be expected with cables longer than 1.5 m.
Reversed pole connection can be advantageous, depending on the application
involved. Voltage is created by the Peltier effect when welding materials which are
widely disparate in the electrical voltage sequence. This voltage is added to the
voltage of the welding power control (recommended) or acts against it, depending
on the secondary cable pole configuration. A secondary cable pole configuration
which suits your particular application should therefore always be selected.