440 volt inverter motor protection table

No

Name

                                                   Description

Setting range

Factory setting

Change during operation

Control methods

v/f

v/f with pg

Open loop vector

Flux vector

L1-01

Motor protection selection

Sets whether the motor overload function is enabled or disabled at electric thermal overload relay

0: disabled

1:enabled

Note : this setting enables or disables the motor overload protection function. The rated current setting (e2 – 01 ) is used as a basis for overload detection . when several motors are connected to one inverter set to 0 (disabled) and ensure that each motor is installed with a protection .

Device . in some applications when the inverter power supply is turned off , the thermal value is reset so even if this constant is set to 1, (enabled) . protection may not be effective . if the overload ol1 alarm (1f)is set in one of the multi function outputs (h2-01 to h2-03) , the output will be turned on when the electronic thermal value reaches 90% of the overload detection level .

0,1

1

x

B

B

B

B

L1-02

Motor protection time constant

The detection time of electronic thermal protection it is in undo of minute

Note : normally it is not necessary to change this setting . (the factory setting is a 150% 1 minute capacity ) . set the electronic thermal protection operation time if a 150% overload is applied after operating continuously at the motor ,s rated current (hot start) . when the motor ,s overload capacity level is known , set the hot start overload resistance level for the motor , but be sure to allow some margin for safety . decrease this setting when you want to detect an overload more quickly .

0.1~5.0

1.0

x

B

B

B

B

L2-01

Motor protection time constant

This constant specifies the processing that is performed when a momentary power loss occurs .

0 : disabled (an under voltage fault is detected when there is a momentary power loss ) .

1 : enabled ( restarts if power is restored within the l2-02 time . an under voltage fault is detected for a longer power loss ).

2 : enabled during cpu operation ( restarts if power is restored while the cpu is operating  an under voltage fault is not detected ).

Note :when power loss ride thru is enabled ( setting 1 or 2) operation will be restarted after a speed search if the power is restored within the allowed time interval when power loss ride thru is disabled ( setting 0) an under voltage fault will be detected if power is interrupted , for more than 15 ms

0~2

0

X

B

B

B

B