Yaskawa A1000 6-Phase/12-Pulse Input - Manual (Page 88)

n 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. The external
power supply shall be a UL listed Class 2 power supply source or equivalent only.
Table 16 Control Circuit Terminal Power Supply
Input / Output Terminal Signal Power Supply Specifications
Open Collector Outputs P1, P2, PC, DM+, DM- Requires class 2 power supply
Digital inputs S1 to S8, SC, HC, H1, H2
Use the internal LVLC power supply of the drive. Use class
2 for external power supply.
Analog inputs / outputs +V, -V, A1, A2, A3, AC, AM, FM
Use the internal LVLC power supply of the drive. Use class
2 for external power supply.
n Drive Short Circuit Rating
The drive is suitable for use on a circuit capable of delivering not more than 100,000 RMS symmetrical Amperes, 480 Vac
maximum (400 V Class), when protected by fuses as specified in Factory Recommended Branch Circuit Protection on page
85 .
u 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.
n E2-01: Motor Rated Current
Setting Range: Model-dependent
Default Setting: Model-dependent
Parameter E2-01 protects the motor when parameter L1-01 is not set to 0. The default for L1-01 is 1, which enables protection
for standard induction motors.
If Auto-Tuning has been performed successfully, the motor data entered to T1-04 is automatically written to parameter E2-01.
If Auto-Tuning has not been performed, manually enter the correct motor rated current to parameter E2-01.
n L1-01: Motor Overload Protection Selection
The drive has an electronic overload protection function (oL1) based on time, output current, and output frequency that protects
the motor from overheating. The electronic thermal overload function is UL-recognized, so it does not require an external
thermal relay for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
Table 17 Overload Protection Settings
Setting Description
0 Disabled Disabled the internal motor overload protection of the drive.
1 Standard fan-cooled motor (default)
Selects protection characteristics for a standard self-cooled motor with limited
cooling capabilities when running below the rated speed. The motor overload
detection level (oL1) is automatically reduced when running below the motor rated
speed.
2 Drive duty motor with a speed range of 1:10
Selects protection characteristics for a motor with self-cooling capability within a
speed range of 10:1. The motor overload detection level (oL1) is automatically
reduced when running below 1/10 of the motor rated speed.
3 Vector motor with a speed range of 1:100
Selects protection characteristics for a motor capable of cooling itself at any speed
including zero speed (externally cooled motor). The motor overload detection level
(oL1) is constant over the entire speed range.
4 Permanent Magnet motor with variable torque
Selects protection characteristics for a variable torque PM motor. The motor
overload detection level (oL1) is automatically reduced when running below the
motor rated speed.
5 Permanent Magnet motor with constant torque
Selects protection characteristics for a constant torque PM motor. The motor
overload detection level (oL1) is constant over the whole speed range.
6 Standard fan-cooled motor (50 Hz)
Selects protection characteristics for a standard self-cooled motor with limited
cooling capabilities when running below the rated speed. The motor overload
detection level (oL1) is automatically reduced when running below the motor rated
speed.
10 Standards Compliance
88 YASKAWA TOEP YAIA1U 02A YASKAWA AC Drive – A1000 6-Phase/12-Pulse Input Installation Manual