169
Figure 6.72 Motor Protection Opeartion Time
■ Motor Protection Using PTC Input
A motor PTC can be connected to the drive analog input terminal MT for motor overheat
protection.
When the motor PTC signal exceeds the overheat alarm level, the keypad will display OH1
(Motor Overheat) and the motor will continue to run. When the motor PTC signal exceeds the
overheat fault level, the keypad will display OH1 (Motor Overheat) and the drive will shut off
the output and stop the motor using the stop method selected in P1-03.
Connect the PTC according to the following figure.
V
I
DIP switch S1
AC Drive
+V
(+10V, 20mA)
A2 (0-10V)
AC
Divider
resistance
12kΩ
PTC
thermistor
Figure 6.73 PTC Input Wiring
The PTC must have the characteristics illustrated in the following figure in each motor phase.
The motor overload protection normally requires 3 PTC inputs connecting in a series.
Tr–5 Tr Tr + 5
Tr’
Temperature
1330
550
Resistance
(Ω)
Class F
150 ℃
Class H
180 ℃
Tr : threshold value
Содержание EVO 6800 Series
Страница 1: ...MANUAL Compact Vector Drive EVO 6800 Series...
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Страница 260: ...260 Above panel display value excluding the decimal point units please according to actual user unit conversion...