Motor Thermal Protection; Earth Fault Protection; Incorrect Wiring - ABB ACS310 User Manual



Motor thermal protection

The motor can be protected against overheating by activating the Motor thermal
protection function.
The drive calculates the temperature of the motor on the basis of the following
assumptions:
1. The motor is in the ambient temperature of 30 °C when power is applied to the
drive.
2. Motor temperature is calculated using either the user-adjustable or automatically
calculated motor thermal time constant and motor load curve (see the figures
below). The load curve should be adjusted in case the ambient temperature
exceeds 30 °C.
Motor
load
100%
Temp.
rise
100%
63%
Motor thermal time constant
Settings
Parameters 3005 MOT THERM PROT...3009 BREAK POINT FREQ
Note: It is also possible to use the motor temperature measurement function. See
section Motor temperature measurement through the standard I/O


Earth fault protection

The Earth fault protection detects earth faults in the motor or motor cable. The
protection is active only during start.
An earth fault in the input power line does not activate the protection.
Settings
Parameter 3017 EARTH FAULT


Incorrect wiring

Defines the operation when incorrect input power cable connection is detected.
www.aotewell.com
150
t
P 3007 100 =
127%
50
P 3008
t
sales@aotewell.com
Industry Automation
Program features 135
Output current relative (%) to
motor nom. current
Break point
Motor load curve
Zero speed load
P 3009
on page 145.
+86-755-8660-6182
f