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6)
OVERCURRENT AND SHORT CIRCUIT PROTECTION
Remote overload protection is required. (see Fig. 7). [
Integral solid state short circuit protection does not provide
branch circuit protection. Branch circuit protection must be provided in accordance with the Manufacturer
Instructions, National Electrical Code and any additional local code
].
The protection devices shown infigure 7a and figure 7b must include a branch fuse type: LP-CC-8 by COOPER
BUSSMAN LCC or equivalent. [
Suitable for Use On A Circuit Capable Of Delivering Not More Than 5000 Arms
Symmetrical Amperes, 79 Vdc Maximum for all models when protected by semiconductor fuses model LP-CC-8 by
COOPER BUSSMAN LCC.
]
7)
ELECTRO-MAGNETIC INTERFERENCE
Drive and all related cabling are source of E.M. interference (conducted and radiated). In order to comply to directive
2004/108/CE and related standards (EN 61800-3) installation has to be done according to schematics in Fig 7 and
following indications:
•
Locate drives, power supply, transformer and related cables inside the same enclosure, which has to be hermetic
to electromagnetic fields.
•
Interpose a filter between the transformer primary and the main (CORCOM mod. 6VDK1). Locate the filter near
the supply entrance. Use only shielded cable (outside the enclosure) for connecting motor and drive.
•
Connection made to Protective Earth terminal (PE), shown in Fig.7, must be short and have the lowest possible
inductance.
•
Use a supply transformer with a metal shield between primary and secondary winding and connect this shield to
earth.
8)
FORCED COOLING
According to operating conditions (ambient temperature, current setting, duty-cycle) forced cooling can be necessary. The
most sure method to evaluate if this need exists or not is to measure temperature of the drive heatsink; if this temperature
is greater than 65 - 70 °C in the most unfavourable working conditions, you need a forced cooling to obtain a reasonable
long life from drive.
