7 Installation at Site
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PumpDrive 2
WARNING
Simultaneous connection of several motors to the frequency inverter output
Damage to the frequency inverter!
Fire hazard!
▷ Never simultaneously connect several motors to the frequency inverter output.
CAUTION
Improper dielectric test
Damage to the frequency inverter!
▷ Never carry out dielectric tests on frequency inverter components.
▷ Only carry out dielectric tests on the motor, motor connection cable, or power
cable after having disconnected the frequency inverter connections.
NOTE
Depending on the combination of settings, the frequency inverter could
conceivably restart automatically after acknowledgement/reset or when the cause
of the malfunction or fault has been eliminated.
The frequency inverter is equipped with electronic safety devices, which in case of a
disturbance or malfunction, trip and de-energise the inverter, causing it to stop.
Use only the available cable gland holes (if necessary, in combination with double
cable glands) for establishing the cable connections. Any additional drilling could
generate metal chips and damage the equipment.
7.4.2 Information for planning the system
7.4.2.1 Power/connection cables
Selecting the power/connection cables
The type of connection cable you choose depends on various factors such as, for
example, the type of connection, the ambient conditions and the type of system.
Connection cables must be used in accordance with their intended use, and the
manufacturer specifications regarding nominal voltage, current, operating
temperature and thermal effects must be observed.
Power/connection cables must not be routed across or near hot surfaces unless they
have been designed for this kind of application.
When they are used in mobile system components, flexible or highly flexible power/
connection cables must be employed.
The cables used for connections to permanently installed devices should be as short
as possible and be properly connected to these devices.
Different earth bus bars should be used for control and power/motor connection
cables.
Power cable
Unshielded cables can be used as power cables.
The power cables must be designed with a cross-section suitable for the nominal
mains current.
If a mains contactor is used in the power cable (before the frequency inverter), this
must be configured for an AC1 duty rating; the rated current values of the frequency
inverters used are added and the result is increased by 15%.
Motor connection cable
Shielded cables must be used as motor connection cables.
Control cable
Shielded cables must be used as control cables.
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