22/09/2021
WEIDOS Quick Start Guide
Version: 00.00.01
Page 48 / 52
Provide adequate clearance for cooling and wiring Weidos. Is designed for natural convection cooling. For
proper cooling, you must provide a clearance of at least 20 cm above and below the devices. Also, allow at
least 20 cm of depth between the front of the modules and the inside of the enclosure.
Notes for maintenance:
A well-planned and executed maintenance program is essential to the satisfactory operation of solid-state
electrical equipment. The kind and frequency of the maintenance operation will vary with the kind and
complexity of the equipment as well as with the nature of the operating conditions. Maintenance
recommendations of the manufacturer or appropriate product standards should be followed.
The following factors should be considered when formulating a maintenance program:
- Maintenance must be performed by qualified personnel familiar with the construction, operation, and
hazards involved with the control.
- Maintenance should be performed with the control out of operation and disconnected from all sources of
power.
- Care should be taken when servicing electrostatic sensitive components. The manufacturer's
recommendations for these components should be followed.
- Ventilation passages should be kept open. If the equipment depends upon auxiliary cooling, e.g., air, water,
or oil, periodic inspection (with filter replacement when necessary) should be made of these systems.
- The means employed for grounding or insulating the equipment from ground should be checked to assure
its integrity.
- Accumulations of dust and dirt on all parts, including on semiconductor heat sinks, should be removed
according to the manufacturer's instructions, if provided; otherwise, the manufacturer should be consulted.
Care must be taken to avoid damaging any delicate components and to avoid displacing dust, dirt, or debris
in a way that permits it to enter or settle into parts of the control equipment.
- Enclosures should be inspected for evidence of deterioration. Accumulated dust and dirt should be removed
from the top of the enclosures before opening doors or removing covers.
- Certain hazardous materials removed as part of maintenance or repair procedure (e.g., polychlorinated
biphenyls (PCBs) found in some liquid filled capacitors) must be disposed of as described in Federal
regulations.
Safety rules for maintenance personnel
Consider the following steps to follow. A false maneuver could be the cause of an accident or material
damage.
Do not disassemble or modify the modules. This could lead to breakdowns or malfunctions and could lead to
injuries or fire.
