
7
Startup
Parameter setting: Frequency inverters for category 2 motors
Operating Instructions – EDR..71 – 315, EDRN63 – 315
130
INFORMATION
If the mains is switched off without 24 V backup mode, the monitoring function is re-
set completely.
In this case the approval for operation in explosion-proof areas becomes invalid.
7.3.4
Overload protection
The requirements regarding overload protection of the motor are defined in the EU
type examination certificate. Following a description of the overload protection imple-
mented in MOVITRAC
®
B and MOVIDRIVE
®
B inverters.
Operation above the permitted current range is permitted for 60 seconds. After about
50 seconds, the current is reduced to the permitted value along a ramp within
10 seconds to prevent a sudden reduction of the current limitation and thus torque
shocks. The current can exceed the permitted range again after a recovery time of
10 minutes. Operation below 5 Hz is permitted for 60 seconds. After this time has
elapsed, the unit switches off with fault F110 "Ex e protection" and performs an emer-
gency stop as fault response.
The digital inputs P62_ can be parameterized to "Ex e current limitation active".
Conditions for the output being set ("1" signal):
•
Current limit 1 exceeded
•
Recovery time not yet elapsed
•
Operation < 5 Hz longer than 60 seconds
The current-time monitoring is not reset by a fault reset.
The current-time monitoring is active for both mains operation and 24 V backup mode.
INFORMATION
Third-party inverters must comply with the overload protection requirements of the
EU type examination certificate.
25896334/EN – 06/2019
Содержание EDR200
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