User`s manual

LOW HARMONIC REGENERATIVE CABINET DRIVE vacon • 49
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7. LOW HARMONIC REGENERATIVE CABINET DRIVE
This chapter describes the functionalities of control devices (switches, push-buttons and LED lamps) of the
NXC low-harmonic regenerative drive (mechanical units FI9-14). The functionalities of additional “+”
options are not described here.
7.1 NXC Low-Harmonic Regenerative Cabinet Pre-Charging and MCCB Operating Instructions
There are three different ways to control the DC pre-charging circuit and the circuit-breakers (MCCB) of
the low harmonic regenerative drive. The desired control place or the manner of control can be selected
with the
REM-MAN-AUTO selector switch (-S6). The three possible control places/ways are:
 MAN – Manual operation by the
0-1-Start switch on the cabinet door
 REM – Remote operation with signals to the control terminals
 AUTO – Automatic operation which automatically pre-charges and closes the MCCB when the
supply voltage is energized
Figure 7-1. MCCB Control selector switch (-S6)
7.1.1 Manual operation (MAN)
The operator can control the circuit-breaker (MCCB) and the charging circuit manually from the cabinet
while the MCCB control switch –S6 is in Man position. The 0–1-Start switch is used for the local operation
of the MCCB and pre-charging circuit.
Figure 7-2. 0-1-Start Control switch (-S10)