Version 3.11
| HPI Combi Flow User Guide |
21
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4.5. HPS Motor Connection
The stand-alone HPS motor can NOT be installed directly on the mains. HPS motor needs always to be controlled by the drive. The
three phases from the drive needs to be connected to U1, V1, W1 (Please see DWG 1).
The motor should be connected to the HP Combi Smart U, V, and W terminals using a suitable 3 or 4 core cable. Where a 3 core
cable is utilised, with the shield operating as an earth conductor, the shield must have a cross sectional area at least equal to the
phase conductors when they are made from the same material. Where a 4 core cable is utilised, the earth conductor must be of at
least equal cross sectional area and manufactured from the same material as the phase conductors.
HPS motors are designed for one supply voltage as standard. It is not possible to make star/delta connections in the terminal box
like on an AC motor.
The motor earth must be connected to one of the HP Combi Flow earth terminals.
Maximum permitted motor cable length is defined in section
4.4. EMC Compliant Installation on page 19
For compliance with the European EMC directive, a suitable screened (shielded) cable should be used. Braided or twisted type
screened cable where the screen covers at least 85% of the cable surface area, designed with low impedance to HF signals are
recommended as a minimum. Installation within a suitable steel or copper tube is generally also acceptable. The cable screen
should be terminated at the motor end using an EMC type gland allowing connection to the motor body through the largest
possible surface area.
Automatic switchgear should not be installed between the drive output and the motor, opening and closing contacts in this circuit
whilst the drive is energised will inevitably reduce the lifetime of the drive and could cause product failure. If an isolator is required
to be placed between the drive and the motor in order to comply with local regulations, the device must not be operated when the
drive is running.
Rotation direction:
there are two ways to change the rotating direction of the HPS motor. First of all, by changing the sequence of
2 phases from the drive or by having the drive to change the rotating direction via the software (Please see DWG 2).
WARNING
Please be aware that when turning the shaft and without any connection to the drive, the HPS motor will work as
generator and deliver a voltage level (BEMF Voltage) according to the rotating speed.
W2
U W V
U V W
U2 V2
U1
W1
W
DWG 1
DWG 2
V
U
V1
shaft
W2
U W V
U V W
U2 V2
U1
W1
W
DWG 1
DWG 2
V
U
V1
shaft
4
Elec
trical Installation