Electric System; Direction Of Rotation; Motor Protection; Switch-On Types - Kessel GTF 50 Hz Series Instructions For Installation, Operation And Maintenance

Details of the filling can be found in the pump data sheet! Damaged coatings must be repaired immediately.
Only an intact coating satisfies its intended purpose!
If you follow these rules, your product can be stored for a longer period. Please note, however, that the elastomer
parts and the coating are subject to natural embrittlement. We recommend that these be checked and replaced as
necessary if storing for longer than 6 months. Please contact the manufacturer in this case.
5.5

Electric system

The appropriate power supplier's regulations must be heeded for the routing and selection of electric cables and
connection of the motor. The motor must be protected by a motor protection switch. Have the motor connected in
accordance with the circuit diagram. Watch out for the correct direction of rotation. If the direction of rotation is not
correct, the pump will not produce the given output and may become damaged under unfavourable circumstances.
Check the operating voltage and ensure an even current consumption of all phases according to the pump data
sheet.
Make sure that all temperature sensors and monitoring devices such as seal chamber check, are connected and
check their function.
Risk caused by electric current!
There is a danger to life if current is not handled properly. All pumps with free cable ends must be connected by a
qualified electrician.
5.6

Direction of rotation

The direction of rotation of 3-phase motors must be checked before initial operation. When a KESSEL AG control
unit is used, a rotary field fault is indicated in the event of an incorrect connection to the mains. If the direction of
rotation is wrong, 2 phases of the mains connection must be swapped. The given pumping and output data are
only achieved with a rotary field rotating clockwise. The pumps have not been designed for operation with a rotary
field rotating anti-clockwise.
5.7

Motor protection

The minimum requirement is a thermal relay / motor protection switch with temperature compensation, differential
actuation and synchrocheck in accordance with VDE 0660 or corresponding national regulations. If the pumps are
connected to mains power supplies where frequent problems occur, we recommend the additional installation of
protective devices e. g. overvoltage, undervoltage or phase failure relays, lightening protection etc.). Local and
legal regulations must be complied with when the pump is connected.
5.8

Switch-on types

Switch-on types for cables with free ends (without plugs)
The control unit distributes the operating times to both pumps by changing the switch-on sequence after every
pump run has finished.
Direct switch-on (up to 5kW)
The motor protection should be set to the rated current at full load. We recommend setting the motor protection at
5% above the current measured at the operating point for partial load operation.
V 1.0
Set-up and putting into operation
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