Connection Of A Generator Temperature Sensor To The Converter I/O; Routing The Cables - ABB ACS800 Series Hardware Manual

Connection of a generator temperature sensor to the converter I/O

WARNING! IEC 60664 requires double or reinforced insulation between live parts
and the surface of accessible parts of electrical equipment which are either
non-conductive or conductive but not connected to the protective earth.
To fulfil this requirement, the connection of a thermistor (and other similar
components) to the digital inputs of the converter can be implemented in three
alternate ways:
1. There is double or reinforced insulation between the thermistor and live parts of
the generator.
2. Circuits connected to all digital and analogue inputs of the converter are protected
against contact and insulated with basic insulation (the same voltage level as the
converter main circuit) from other low voltage circuits.
3. An external thermistor relay is used. The insulation of the relay must be rated for
the same voltage level as the main circuit of the converter. For connection, see
appropriate Firmware Manual.

Routing the cables

Route the rotor cable away from other cable routes. Rotor cables of several
converters can be run in parallel installed next to each other. It is recommended that
the rotor cable, supply line cable and control cables be installed on separate trays.
Avoid long parallel runs of rotor cables with other cables in order to decrease
electromagnetic interference caused by the rapid changes in the rotor voltage.
Where control cables must cross supply line and rotor cables, make sure they are
arranged at an angle as near to 90 degrees as possible. Do not run extra cables
through the converter.
The cable trays must have good electrical bonding to each other and to the
grounding electrodes. Aluminium tray systems can be used to improve local
equalizing of potential.
A diagram of the cable routing is shown below.
Supply line cable
90 °
min 200 mm (8 in.)
Converter
min 300 mm (12 in.)
Control cables
Rotor cable
min 300 mm (12 in.)
Supply line cable
Rotor cable
min 500 mm (20 in.)
Planning the electrical installation
69