Limiting Relay Output Maximum Voltages At High Installation Altitudes; Implementing A Motor Temperature Sensor Connection - ABB ACH580-01 Hardware Manual

110 Guidelines for planning the electrical installation
Install the protective component as close to the inductive load as possible. Do not install
protective components at the relay outputs.
1 Relay output
2 Varistor
3 RC filter
4 Diode
Limiting relay output maximum voltages at high installation
altitudes
See Isolation areas, R1...R5 (page 294)

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.
To connect a motor temperature sensor and other similar components to the drive, you
have four 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 inputs of the drive.
230 V AC
1
230 V AC
+ 24 V DC
and Isolation areas, R6...R9 (page
2
3
4
295).