SEW MOVITRAC LTE-B series, Operating Instructions Manual

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Operating Instructions – MOVITRAC® LTE-B
31
4
Electrical installation
Installation
Disabling the EMC
filter varistor (IP20) IP20 inverters equipped with an EMC filter (such as MOVITRAC
®
LTE-B xxxx xAxx 00
and MOVITRAC
®
LTE-B xxxx xBxx 00) have a higher leakage current to ground than
devices without EMC filter. Errors might be signaled on ground indicators when operat-
ing more than one MOVITRAC
®
LT inverter. In this case, you can remove the EMC filter
by removing the EMC screw on the side of the device.
• WARNING Danger of electric shock. Dangerous voltage levels can still be
present inside the unit and at the terminals up to 10 minutes after disconnec-
tion from the power supply.
Severe or fatal injuries.
– Disconnect and isolate the inverter from the power supply at least 10 minutes
before you begin removing the EMC screw from MOVITRAC
®
LTE-B.
MOVITRAC
®
LTE-B inverters are equipped with components that suppress fluctuations
in the input line voltage. The purpose of these components is to protect the power inputs
from voltage peaks caused by lightning or by other devices in the same supply system.
Components that suppress surges might cause a high-voltage test (flash test) carried
out on a drive system to fail.
To being able to carry out a high-voltage test on a system, you therefore have to remove
both screws on the side of the device to separate these components. After completion
of the high-voltage test, replace the two screws and repeat the test. This test should fail
as it indicates that the circuit is now protected from voltage surges again.
2933422987
[1] EMC screw
[2] VAR screw
[1] [2]