1.8 L: Protection Functions
190
YASKAWA ELECTRIC
SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
Figure 1.75
Figure 1.75 Connection of a Motor PTC
The PTC must have the following characteristics for one motor phase. Normally a motor is
protected by three PTCs connected in series.
Figure 1.76
Figure 1.76 Motor PTC Characteristics
Overheat detection using a PTC can be set up by parameters L1-03/04/05 as explained
below.
■
L1-03: Motor Overheat Alarm (oH3) Operation Selection
Sets the drive operation when the PTC input signal reaches the motor overheat alarm level.
Drive
+V
(+10.5V, 20 mA)
Multi-function input
Branch
resistor
PTC
thermistor
MA
Multi-function
output (contact)
Multi-function
output (photo-coupler)
MB
MC
P1
P2
PC
A2 (0-10 V)
AC
Class F
150°C
Class H
180°C
Resistance (
W
)
1330
Tr: threshold value
Temperature
Tr
̉
Tr + 5
Tr
Tr
-
5
550
Содержание OYMC V1000
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