ABB ACH580-31, Hardware Manual

Page: 59 / 284

￭
North America
Installations must be compliant with NFPA 70 (NEC)
1)
and/or Canadian Electrical
Code (CE) along with state and local codes for your location and application.
1)
National Fire Protection Association 70 (National Electric Code).
￭ Other regions
The disconnecting device must conform to the applicable local safety regulations.
Examining the compatibility of the motor and drive
Use asynchronous AC induction motors, permanent magnet synchronous motors
or ABB synchronous reluctance motors (SynRM motors) with the drive.
Select the motor size and drive type from the rating table on basis of the AC line
voltage and motor load. You can find the rating table in the appropriate hardware
manual. You can also use the DriveSize PC tool.
Make sure that the motor can be used with an AC drive. See Requirements
tables (page 60) . For basics of protecting the motor insulation and bearings in
drive systems, see Protecting the motor insulation and bearings (page 59) .
Note:
• Consult the motor manufacturer before using a motor with nominal voltage
that differs from the AC line voltage connected to the drive input.
• The voltage peaks at the motor terminals are relative to the supply voltage of
the drive, not to the drive output voltage.
￭
Protecting the motor insulation and bearings
The drive employs modern IGBT inverter technology. Regardless of frequency, the
drive output comprises pulses of approximately the drive DC bus voltage with a
very short rise time. The pulse voltage can almost double at the motor terminals,
depending on the attenuation and reflection properties of the motor cable and
the terminals. This can cause additional stress on the motor and motor cable
insulation.
Modern variable speed drives with their fast rising voltage pulses and high
switching frequencies can generate current pulses that flow through the motor
bearings. This can gradually erode the bearing races and rolling elements.
d
u/dt filters protect motor insulation system and reduce bearing currents. Common
mode filters mainly reduce bearing currents. Insulated N-end (non-drive end)
bearings protect the motor bearings.
Guidelines for planning the electrical installation 59