Shihlin SA3 Series, Руководство пользователя

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Application parameter group 10
PARAMETER DESCRIPTION 261
5.11.11 Switch to commercial power supply function

Inverter has built-in switch to commercial power supply function. Magnetic contactor for switching can be
conveniently used by inputting start, stop and automatic switching signal.
Parameter Name Default Setting Range Content
10-29
P.247
Switch to commercial
supply MC switch-over
interlock time
1.0s 0.1～100.0s ---
10-30
P.248 Switch to commercial
supply waiting time
0.5s 0.1～100.0s ---
10-31
P.249
From inverter to
commercial power
supply switch-over
frequency
99999
0～60.00Hz ---
99999 Off
10-32
P.250 Automatic switch-over
frequency range
99999
0～10.00Hz
After switching from inverter operation to commercial power
supply operation, after inverter start command (STF/STR) is
OFF, switch to inverter operation.
99999
After switching from inverter operation to commercial power
supply operation, after inverter start command (STF/STR) is
OFF, switch to inverter operation, and slow down to stop.
Switch to commercial supply function

10-31(P.249) sets the frequency for switching from inverter operation to commercial supply. From start-up to
10-31(P.249) inverter operation, the output frequency is above 10-31(P.249) value, automatically switching to
commercial supply. 10-31(P.249) set to 99999, without automatic switching.

If 10-32(P.250)≠99999, 10-31(P.249)≠99999 will be valid at automatic switching operation. After switching from
inverter operation to commercial supply, if frequency command is lower than (10-31(P.249)~10-32(P.250)), it will
automatically switch to inverter operation and operate at the frequency of the frequency command. If the inverter
start command (STF/STR) is set to OFF, it will also switch to inverter operation.

If 10-32(P.250)=99999, 10-31(P.249)≠99999 will be valid at automatic switching operation. After switching from
inverter operation to commercial supply, the inverter start command (STF/STR) will be set to OFF and then switch
to inverter operation, and slow down to stop.

Examples for commercial power supply frequency switch-over function:
1. Set 03-03(P.80) = 37, 03-04(P.81) = 38, 03-10(P.40) = 10 and 03-12(P.129)= 9. The wiring diagram is
presented below:
Setting