ABB ACS510-01 User Manual page 222

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Motor thermal protection
According to regulations, the motor must be protected against thermal overload and
the current must be switched off when overload is detected. The drive includes a
motor thermal protection function that protects the motor and switches off the current
when necessary. Depending on a drive parameter value (see <Cross-
reference>Group 35: MOTOR TEMP MEAS), the function either monitors a
calculated temperature value (based on a motor thermal model) or an actual
temperature indication given by motor temperature sensors. The user can tune the
thermal model further by feeding in additional motor and load data.
The most common temperature sensors are:
• motor sizes IEC180...225: thermal switch (e.g. Klixon)
• motor sizes IEC200...250 and larger: PTC or PT100.
Ground Fault Protection
ACS510 internal fault logic detects ground faults in the drive, motor, or motor cable.
This fault logic:
• Is NOT a personal safety or fire protection feature.
• Can be disabled using parameter 3017
• Could be tripped by leakage currents (input power to ground) associated with
long high capacitance motor cables.
Grounding and Routing
Motor Cable Shielding
Motor cables require shielding using conduit, armored cable or shielded cable.
• Conduit – When using conduit:
– Bridge joints with a ground conductor bonded to the conduit on each side of
the joint.
– Bond conduit run to the drive enclosure.
– Use a separate conduit run for motor cables (also separate input power and
control cables).
– Use a separate conduit run for each drive.
• Armored Cable – When using armored cable:
– Use six-conductor (3 phases and 3 grounds), type MC continuous corrugated
aluminum armor cable with symmetrical grounds.
– Armored motor cable can share a cable tray with input power cables, but not
with control cables.
• Shielded Cable – For shielded cable details, see "Motor Cable Requirements for
CE Compliance" below.
Grounding
See "Ground Connections" in "Input Power Connections" above.
Technical Data
Supplied from China by: Guangzhou Tofee Electro Mechanical Equipment Co., Ltd
Email: info@tofee.com.cn
ACS510 User's Manual
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