Drive Motor Overload Protection - YASKAWA A1000 Technical Manual

D.3 UL Standards
Wiring Fuses for Models 4A0930 and 4A1200
NOTICE: If a fuse is blown or equipment for residual current monitoring/detection (RCM/RCD) is tripped, check the wiring and the
selection of the peripheral devices to identify the cause. Contact YASKAWA before restarting the drive or the peripheral devices if the
cause cannot be identified.
Install a fuse on the input side to protect drive wiring and prevent other secondary damage. Wire the fuse so that leakage
current in the upper controller power supply will trigger the fuse and shut off the power supply.
Select the appropriate fuse from
Voltage Class Model
4A0930
Three-Phase
400 V Class
4A1200

Low Voltage Wiring for Control Circuit Terminals
Wire low voltage wires with NEC Class 1 circuit conductors. Refer to national state or local codes for wiring. If external
power supply used, it shall be UL Listed Class 2 power source only or equivalent. Refer to NEC Article 725 Class 1,
Class 2, and Class 3 Remote-Control, Signaling, and Power Limited Circuits for requirements concerning class 1 circuit
conductors and class 2 power supplies.
Input/Output
Open Collector Outputs DM+, DM-
Digital inputs S1-S8, SN, SC, SP, HC, H1, H2
Analog inputs/outputs +V, -V, A1, A2, A3, AC, AM, FM

Drive Short-Circuit Rating
This drive is suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical amperes, 600 V
ac maximum (Up to 240 V in 200 V class drives, up to 480 V for 400 V class drives), when protected by Bussmann Type
FWH fuses as specified in
 Drive Motor Overload Protection
Set parameter E2-01 (motor rated current) to the appropriate value to enable motor overload protection. The internal
motor overload protection is UL Listed and in accordance with the NEC and CEC.

E2-01 Motor Rated Current
Setting Range: Model Dependent
Default Setting: Model Dependent
Parameter E2-01 (motor rated current) protects the motor if parameter L1-01 is not set to 0 (default is 1, enabling
protection for standard induction motors).
If Auto-Tuning has been performed successfully, the motor data entered to T1-04 is automatically written into parameter
E2-01. If Auto-Tuning has not been performed, manually enter the correct motor rated current to parameter E2-01.
596
Table D.10.
Table D.10 Input Fuses for Models 4A0930 and 4A1200
Selection
Input Voltage
Current (A)
(V)
480 1500
480 1500
Table D.11 Control Circuit Terminal Power Supply
Terminal Signal
Table D.8.
Pre-arc
Model
2 2
I t (A s)
CS5F-1200
140000 to
3100000
FWH-1200A
CS5F-1500
320000 to
3100000
FWH-1600A
Requires class 2 power supply.
Use the internal LVLC power supply of the drive. Use class 2 for external power supply.
Use the internal LVLC power supply of the drive. Use class 2 for external power supply.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Input Fuse (Example)
Manufacturer Rating
Fuji Electric AC500 V, 1200 A
Bussmann AC500 V, 1200 A
Fuji Electric AC500 V, 1500 A
Bussmann AC500 V, 1600 A
Power Supply Specifications
Pre-arc
2 2
I t (A s)
276000
–
351000
–