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8 Instructions for UL and cUL
Drive Short-Circuit Rating
This drive has undergone the UL short-circuit test, which certifies that during a short circuit
in the power supply the current flow will not rise above 31,000 Amps maximum at 240 V for
200 V class drives and 440 V for 400 V class drives.
• The MCCB and breaker protection and fuse ratings (refer to the preceding table) shall be
equal to or greater than the short-circuit tolerance of the power supply being used.
• Suitable for use on a circuit capable of delivering not more than 31,000 RMS symmetrical
amperes for 240 V in 200 V class drives (up to 440 V for 400 V class drives) motor
overload protection.
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
Factory Default: Model Dependent
The motor rated current parameter (E2-01) protects the motor and allows for proper vector
control when using open loop vector or flux vector control methods (A1-02 = 2 or 3). The
motor protection parameter L1-01 is set as factory default. Set E2-01 to the full load amps
(FLA) stamped on the nameplate of the motor.
The operator must enter the rated current of the motor (T1-04) in the menu during
auto-tuning. If the auto-tuning operation completes successfully (T1-02 = 0), the value
entered into T1-04 will automatically write into E2-01.
L1-01 Motor Overload Protection Selection
The drive has an electronic overload protection function (oL1) based on time, output current,
and output frequency, which protects the motor from overheating. The electronic thermal
overload function is UL-recognized, so it does not require an external thermal overload relay
for single motor operation.
This parameter selects the motor overload curve used according to the type of motor applied.
EN 42
YASKAWA ELECTRIC TOEP C710606 15E - AC Drive V1000 - Quick Start Guide
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