● "Low speed derating frequency" means that when the frequency is higher
than [E4.04], the allowed continuous current is the rated current [S2.04].
When the frequency is lower than [E4.04], the allowed continuous current is
linear reduced to zero speed load [S2.23] at standstill.
● "Zero speed load" means the allowed continuous current (percent of rated
current) at standstill.
At low speed, the cooling of most motors may get worse, and allowed motor
continuous current is getting lower. In this case, the allowed time for motor
overload is getting shorter. In order to prevent motors from getting overload,
please set parameters E4.05 and E4.05 appropriately. For a motor with external
cooling, zero speed load E4.05 can be set to 100 %, and the low speed derating
is switched off.
E4.06 Phase loss protection
Setting range 0 ~ 3
Minimum unit 1
Factory default 3
E4.07 ~ E4.14
● 0: Both input and output phase loss protection active
● 1: Only input phase loss protection active
● 2: Only output phase loss protection active
● 3: Both input and output phase loss protection inactive
When the input phase loss protection is active and the input phase loss error
occurs, the panel displays “IPH.L”; when the output phase loss protection is ac-
tive and the output phase loss error occurs, the panel displays “OPH.L”.
●
An input phase loss can also be triggered by line voltage imbal-
ance or main circuit capacitors deterioration. The protection has
no capability to detect the input phase loss in following circum-
stances:
– No “RUN” command;
– The output current is lower than 30 % of frequency converter
rated current;
– During motor deceleration.
● There will be a dead zone to detect output phase loss in the fol-
lowing cases:
– The output frequency is lower than 1 Hz;
– During DC braking;
– During speed detection restarting;
– During motor parameters auto-tuning;
– Wrong settings of S2.04 "rated motor current".
EFC 3600 Bosch Rexroth AG
Parameter Settings
DOK-RCON03-EFC-3600***-IT03-EN-P
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