9.7 SI Option
9.7.1 Product overview
Large-capacity converter drive
The main circuit insulation system parallel system for the RHC-D Series PWM converter is
used in combination with an insulation transformer to insulate the primary power supply, and
connects to multiple units (2 multiplex, 3 multiplex) to drive the converter. This option applies
to load sharing for all converters, and facilitates drive with up to a 6 multiplex system.
Current sharing
To drive an inverter with multiple converters, it is necessary to equip each converter with an
optical link option. With this optical link, current commands allotted to converters are
conveyed instantly. Current is controlled (feedback control) for each converter, enabling
operation with load sharing determined by the drive capabilities of each converter.
Parallel/single system switching function
In cases such as where a single converter malfunctions when performing parallel system drive,
parallel system operation can be canceled and switched to standard single system operation
with the parallel/single system switching function.
[Installation restrictions]
It is not possible to equip converters with two SI options at the same time. By doing so, operation procedure error "Er6"
will occur.
9.7.2 Model
Model: OPC-VG7-SI
Option name: SI → Optical link option for parallel systems
Accessories: Spacer x 3
Screw (M3) x 3
Optic fiber cable x 1 (for transmission/receipt)
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