Shanghai STEP Electric corporation
Specifications of motor connection
Specifications of output power (motor)
Output voltage
0
～
input voltage, symmetrical 3-phase
Current
See 2.2 Inverter Technical Index and Specification
Switching frequency
Set from 4
～
15 kHz
Rated temp. of cable
Min. 90 °C
Relationship between motor cable
length and switching frequency
See 4.3.6.4 Relationship between Wire Length and Carrier Frequency
Grounding and wiring
Motor cable shielding
Conduit, armored cable or shielded cable shall be used for motor cable shielding.
1) Conduit
①
Both ends of the conduit shall be equipped with a bridge with grounding
conductor.
②
The conduit shall be fixed on the housing.
③
A separate conduit shall be used for the motor cable (and at the same time
separate the routing of input power cable and control cable).
g
Inverter wirin
④
A separate conduit routing shall be provided for each Inverter.
2) Armored cable
①
Both ends of the conduit shall be equipped with a bridge with grounding
conductor.
②
Use 6-conductor (3 power lines and 3 earthing lines) cables with MC
continuous corrugated aluminum armor and symmetrical earthing lines.
③
One cable tray may be shared by the armored motor cable and the input
power cable, but not with the control cable.
3) Shielded cable
It is recommended to use cables with symmetrical PE conductors as per CE
or C-Tick.
Grounding
Refer to above-said
Grounding of Input Power Cable
.
4.1.1.3 AC Reactor on the Input Side
An optional AC reactor may be used to improve the power factor on the input side and
reduce the high harmonic current.
4-
6