YASKAWA OYMC V1000, Programming Manual

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1.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 189
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Figure 1.74
Figure 1.74 Motor Protection Operation Time
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Motor Protection Using PTC a Signal
A motor PTC can be connected to an analog input of the drive. This input is used by the
drive for motor overheat protection.
When the motor overheat alarm level is reached, an OH3 alarm will be triggered and the
drive will continue operation as selected in L1-03. When the overheat fault level is reached
an OH4 fault is triggered, a fault signal will be output and the drive will stop the motor using
the stop method determined in L1-04.
Figure 1.75 shows a PTC connection example for analog input A2. If using analog input A2,
make sure to set DIP switch S1 on the terminal board for voltage input when using this
function.
Operation time (minutes)
Cold start
Hot start
Motor current (%)
E2-01 = 100% m o t o r c u r r e n t
10
7
3
1
0.4
0.1
0 100 150 200