Electrical Installation; Ac Supply Requirements; Dc Supply Requirements; External 24 Vdc Supply - Nidec Digitax HD M75X Series Quick Start Manual

3

Electrical installation

An overlay of the electrical connections / terminals is included on the back page of this manual.
3.1

AC supply requirements

Table 3-1 Supply requirements
Model
Digitax HD M75X
200 V
Digitax HD M75X
200 V
Digitax HD M75X
400 V
* Maximum supply imbalance: 2 % negative phase sequence (equivalent to 3 % voltage imbalance
between phases).
The supply and motor ground connections are made using the M4 threaded holes in the metal side
plate of the drive. Connections are located at the top and bottom of the drive, for further information
refer to the Digitax HD M75X Series Installation and Technical Guide.
For EMC (Electromagnetic compatibility) requirements refer to the Digitax HD M75X Series
Installation and Technical Guide.
3.2

DC supply requirements

The drive is able to operate from a DC supply with a range from 24 Vdc to the maximum DC volts.
The working voltage range of the low voltage DC power supply is as follows:
Minimum continuous operating voltage:
Minimum start up voltage:
Maximum over voltage trip threshold:
3.3

External 24 Vdc supply

The drive will power down and reset if the external 24 Vdc is removed.
WARNING
An external 24 Vdc supply is required to power all the low voltage circuits within the drive.
The working voltage range of the drive 24 V power circuit is as follow:
Table 3-2 Working voltage range of the 24 Vdc supply
All frame sizes
Nominal operating voltage
Minimum continuous operating voltage
Maximum continuous operating voltage
Minimum start up voltage
Maximum fuse rating
Digitax HD M75X Quick Start Guide
Issue Number: 2
Voltage
200 V to 240 V ±10 % single phase
200 V to 240 V ±10 % three phase*
380 V to 480 V ±10 % three phase*
26 V
32 V
230 V drives: 415 V
400 V drives: 830 V
Frequency range
45 to 66 Hz
45 to 66 Hz
45 to 66 Hz
24.0 Vdc
20.4 V
28.8 V
20.4 V
30 A
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