1.1 Features
1-13
Chapter 1 BEFORE USE
Consideration for environment
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Enhancing resistance to the environmental impact
Resistance to the environmental impact has been enhanced compared with the conventional inverter.
(1) Enhanced durability of the cooling fan operated under the environmental impact
(2) Adoption of copper bars plated with nickel or tin
In FRENIC-MEGA, resistance to the environmental impact has been increased compared with the
conventional model (FRENIC5000 G11S/P11S). However, examine the use of the inverter carefully
according to the environment in the following cases:
a. Environment is subject to sulfide gas (at tire manufacturer, paper manufacturer, sewage disposer, or
part of the process in textile industry).
b. Environment is subject to conductive dust or foreign matters (in metalworking, operation using
extruding machine or printing machine, waste disposal).
c. Others: Use outside standard environmental specifications.
When you look for models to be used under conditions as suggested above, please contact our
representative for reinforced models.
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Motor-friendly options
Surge suppression unit SSU (optional)
If a long drive cable to the motor is used, ultra-fine surge voltage (micro surge) occurs at the end
connected to the motor, causing motor degradation, destruction of insulation, and increased noise. By
using a surge suppression unit, such surge voltage can be suppressed.
(1) By simply connecting a surge suppression unit to the motor side, surge voltage can be substantially
reduced.
(2) Because no additional installation work is required, the unit can be easily attached to existing equipment.
(3) The unit can be attached regardless of the motor capacity (contact us, however, before attaching the
unit to a motor exceeding 75 kW).
(4) The unit does not require power supply, and can be used free of maintenance.
(5) Two types (for 50 m and for 100 m) are available.
(6) The unit is compliant with the environmental standards and the safety standards (complies with the
RoHS Directive).
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Structure of surge suppression unit
Figure 1.1-1
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