DFG400-5 & 5DP
COMPACT FLOOR GRINDER
Operating Manual
ELECTRICAL INSTRUCTIONS
The points raised are based on many years practical experience not on text book theory. If
you follow these guidelines your time on site will be productive rather than frustrating.
The DFG400 110v machine is supplied with a specifically commissioned electric motor and
starter switch assembly. Each unit is fully tested and the safety overload relays have been
calibrated and set according to the manufacturers specifications. In the event of the
malfunction on a new machine the owner should first check that the power supply on site is
suitable and adequate.
The motor ideally requires a 32 amp, 110v power supply.
To avoid voltage drop the cable must be a minimum of 4.0mm. The maximum length of
cable must not exceed 30 metres.
The transformer must have a continuous rated output of at least 3kva. In practice this can
mean that a 5kva transformer must be used. Manufacturers of transformers have different
methods of rating their equipment.
The transformer and all cables should be fitted with 32 amp 110v plugs and sockets.
All cables should be fully uncoiled and never left wrapped around cable reels or tied in
loops.
The 240v supply to the 110v transformer should be rated to at least 20 amp if supply
problems are to be avoided.
If the power is to be generated, the DFG400 110v requires a minimum 10kva generator.
The motor is protected with a safety trip in the panel which will cut out the motor if it is
overloaded. Should the trip be activated then you must wait for the motor to cool down
isolate the power supply, open the panel and reset the trip.
If the motor repeatedly cuts out then it will be damaged. The possible causes are either an
inadequate power supply, overloading of the machine, or an electrical fault.
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