YASKAWA A1000 Series Technical Manual

5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual 247
Parameter Details
5
Figure 5.87
Figure 5.87 Motor Protection Operation Time
■ Motor Protection Using a Positive Temperature Coefficient (PTC)
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 will be triggered, a fault signal will be output,
and the drive will stop the motor using the stop method determined in L1-04.
Connect the PTC between terminals AC and A3 and set jumper S4 on the terminal board to “PTC” like shown in
Figure 5.88. Set parameter H3-05 to 0 and parameter H3-06 to E.
Figure 5.88
Figure 5.88 Connection of a Motor PTC
The PTC must have the following characteristics for one motor phase. The drives motor overload detection expects 3 of
these PTCs to be connected in series.
Figure 5.89
Figure 5.89 Motor PTC Characteristics
Operation time (minutes)
Cold start
Hot start
Motor current (%)
E2-01 = 100% motor current
10
7
3
1
0.4
0.1
0 100 150 200
common_TMonly
Drive
Multi-function input
PTC
thermistor
MA
Fault output
Multi-function
digital outputs
MB
MC
A3 (0-10 V)
AC
M1
M2
PTC
AI
DIP Switch S4
M3
M4
M5
M6
YEG
Tr’
Tr + 5K (oH4 Fault Level)Tr - 5K (oH3 Alarm Level)
common_TMonly

YASKAWA A1000 Series Specifications

General

Series	A1000
Type	AC Drive
Altitude	Up to 1000m without derating
Output Frequency	0-400 Hz
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication Options	Modbus, DeviceNet, Profibus, Ethernet/IP
Ambient Temperature	-10 to 50°C
Storage Temperature	-20 to 60°C
Humidity	5% to 95% (non-condensing)
Enclosure Rating	IP20
Horsepower	0.5 to 1000 HP
Power Range	0.4 - 630 kW (varies by voltage and model)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Cooling Method	Fan Cooled
Safety	Safe Torque Off (STO)