Matrix
®
E-Series Technical Reference Manual 380V – 480V
Form: MAE-TRM-E September 2020 REV. 001 16
Grounding
NOTE: For cable shield grounding follow the drive manufacturer’s recommendations.
Grounding and Ground Fault Protection
Due to high leakage currents associated with variable frequency drives, ground fault protective devices
do not necessarily operate correctly when placed ahead of a Matrix Filter feeding a drive. When using
this type of device, its function should be tested in the actual installation.
Overtemperature Interlock
An overtemperature interlock circuit should be used in conjunction with thermal switch to turn off the
drive to prevent filter damage due to abnormal operating conditions.
The temperature switch is normally
closed and will open when an internal reactor temperature of 180°C is reached.
See
Table 5-1:
Overtemperature Switch
below for contact rating information and the drive user manual for
interconnection information.
Table 5-1: Overtemperature Switch
NC Switch opens at 180 Deg. +/- 5 Deg. C
3 120 AC Inductive Loads
3 240 AC Resistive Loads
2.5 240 AC Inductive Loads
MTE highly recommends the use of the overtemperature switch to prevent damage to the filter in rare
instances of overheating from abnormal operating conditions.
WARNING
The filter must always be grounded with a grounding conductor connected to
ground terminals.
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