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Electrical installation
3ADW000379R0501 DCS550 Manual e e
Electrical installation
Chapter overview
This chapter describes the electrical installation procedure of the DCS550.
WARNING!
A qualified electrician may only carry out the work described in this chapter. Follow the
on the first pages of this manual. Ignoring the safety instructions can cause injury or
death.
Make sure that the drive is disconnected from the mains (input power) during installation. If the
drive was already connected to the mains, wait for 5 min. after disconnecting mains power.
Further information is available in the Technical Guide.
Checking the insulation of the assembly
Every drive has been tested for insulation between the main circuit and the chassis (2500 V rms 50 Hz for 1
second) at the factory. Therefore, do not make any voltage tolerance or insulation resistance tests (e.g. hi-pot
or megger) on any part of the drive. Check the insulation of the assembly as follows.
WARNING!
Check the insulation before connecting the drive to the mains. Make sure that the drive is
disconnected from the mains (input power).
1. Check that the motor cable is disconnected from the drive output terminals
C1, D1, F+ and F-.
2. Measure the insulation resistances of the motor cable and the motor
between each circuit (C1, D1) / (F+, F-) and Protective Earth (PE) by using a
measuring voltage of 1 kV DC. The insulation resistance must be higher
than 1 M©.
Connection of a motor temperature sensor to the drive I/O
WARNING!
IEC 60664 requires double or reinforced insulation between live parts and the surface of
accessible parts of electrical equipment that are either nonconductive or conductive but not
connected to the protective earth. To fulfill this requirement, the connection of a thermistor (or
other similar components) to the inputs of the drive can be implemented by 3 alternate ways:
1. there is double or reinforced insulation between the thermistor and live parts of the motor,
2. circuits connected to all digital and analog inputs of the drive are protected against contact
and insulated with basic insulation (the same voltage level as the drive main circuit) from
other low voltage circuits or
3. an external thermistor relay is used. Rate the insulation of the relay for the same voltage
level as the main circuit of the drive.
Summary of Contents for DCS550 Series
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