ABB ACS180-04S-03A7-1, Hardware Manual, Page: 58 / 192

Implementing a motor temperature sensor connection
WARNING!
IEC 61800-5-1 requires double or reinforced insulation between live parts
and accessible parts when:
• the accessible parts are not conductive, or
• the accessible parts are conductive, but not connected to the protective
earth.
Obey this requirement when you plan the connection of the motor
temperature sensor to the drive.
You have these implementation alternatives:
1. If there is double or reinforced insulation between the sensor and the live parts
of the motor: You can connect the sensor directly to the analog/digital input(s)
of the drive. See the control cable connection instructions. Make sure that the
voltage is not more than the maximum allowed voltage over the sensor.
2. If there is basic insulation between the sensor and the live parts of the motor,
or if the insulation type is not known: You can connect a sensor to a digital
input of the drive via an external relay. The sensor and the relay must form a
double or reinforced insulation between the motor's live parts and the digital
input of the drive. Make sure that the voltage does not exceed the maximum
allowed voltage over the sensor.
Protecting the drive against ground faults
The drive is equipped with an internal ground fault protective function to protect
the unit against ground faults in the motor and motor cable. This function is not
a personnel safety or a fire protection feature. See the firmware manual for more
information.
￭ Residual current device compatibility
The drive is suitable for use with residual current devices of Type B.
Note: As standard, the drive contains capacitors connected between the main
circuit and the frame. These capacitors and long motor cables increase the ground
leakage current and may cause nuisance faults in residual current devices.
Implementing the Emergency stop function
For safety reasons, install the emergency stop devices at each operator control
station and at other operating stations where emergency stop may be needed.
Design the emergency stop according to the applicable standards.
58 Guidelines for planning the electrical installation