Table of Contents
Advertisement
34 Electrical installation
Checking the insulation of the resistor circuit
Do not make any voltage tolerance or insulation resistance tests on the brake chopper
modules. Every brake chopper module has been tested for insulation between the main
circuit and the chassis at the factory.
Check the insulation of the brake resistor assembly as follows:
1. Check that the resistor cable is connected to the resistor, and disconnected from the
chopper output terminals R+ and R-.
2. At the brake unit end, connect the R+ and R- conductors of the resistor cable together.
Measure the insulation resistance between the combined conductors and the PE
conductor by using a measuring voltage of 1 kV DC. The insulation resistance must be
higher than 1 Mohm.
ohm
Selecting the voltage
Before wiring the brake chopper unit, select the voltage level as follows:
1. Remove the chopper front panel by undoing the four screws at the top and bottom of
the panel.
2. Set the voltage selection jumper on the chopper control board (see page 15) to the
appropriate voltage as shown below.
Drive supply voltage 380...415 V
Drive supply voltage 440...500 V
Drive supply voltage 525...690 V
Note: In follower choppers, you must set the voltage to FIBER as shown in section
Synchronizing multiple brake choppers
R+
R-
on page 35.
Advertisement
Table of Contents
