ORIGINAL INSTRUCTIONS
5
Short Case Axial Fans
Installation, Operation & Maintenance Manual
VES Andover Ltd. Eagle Close, Chandlers Ford Ind. Est, Eastleigh, Hampshire, SO53 4NF
Tel: 08448 15 60 60 Fax: 02380 26 12 04 E-mail: [email protected] Web: www.ves.co.uk
Wiring
5
Warning
Do not connect any unit to an electrical supply voltage outside of the specification.
The electrical supply
must be fully isolated
before attempting to affect any work on this unit.
All electrical connections to any unit must be carried put in accordance with the current
edition of the I.E.E Regulations, only competent Electricians should be allowed to affect any
electrical work to our units.
Warning
It is the customers responsibility to supply earth fault protection through the building
installation device and a dedicated, isolated power supply with overload protection.
Important
A local isolator must be fitted and mains cables should be suitably sized and terminated
as shown on the underside of the fan terminal box lid, and in figures 6 and 7.
Make the connection in the fan terminal box using the gland provided.
When used in conjunction with a speed controller make sure that the correct speed
controller is used.
For details on connection of VES speed controllers to Short Case Axial Fans, please refer to:
ID179 - Single phase transformer speed controller.
ID835 - Three phase transformer speed controller.
VES Short Case Axial Fans are suitable for operation with frequency inverters when the
following points are observed:
Between the inverter and the motor, sinusoidal filters should be incorporated which are
effective for all phases (sinusoidal output voltage, phase against phase, phase against
protective conductor) as offered by manufacturers.
du/dt filters (also called motor or suppression filters) cannot be used in place of
sinusoidal filters.
When using sinusoidal filters, screened motor leads, metal terminal boxes and a
second earth connection to the motor can, if necessary, be omitted. Checkback by the
supplier of the sinusoidal filter.
If the operational leakage current exceeds 3.5 mA, earthing in compliance with EN 50 178,
art. 5.2.11.1 must be provided.
Important
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