YASKAWA Z1000U Series Quick Start Manual page 87

Input / Output
Multi-function digital inputs
Multi-function analog inputs
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, 240 Vac
maximum (200 V class), 480 Vac maximum (400 V class: 4Eoooo and 4Woooo), and 500 Vac maximum (400 V class:
4Uoooo and 4Poooo) with built-in fuses manufactured by Hinode Electric Co., Ltd. and Mersen (or equivalent).
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 Branch Circuit Protection
For installation in the United States, provide branch circuit protection in accordance with the National Electrical Code (NEC)
and any applicable local codes.
For installation in Canada, provide branch circuit protection in accordance with the Canadian Electrical Code and any
applicable provincial codes.
n E2-01: Motor Rated Current
Setting Range: 10% to 150% of the drive rated current
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 and T2-06 are 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.
Setting
0 Disabled
1 Standard fan-cooled motor (default)
Permanent Magnet motor with variable
4
torque
When connecting the drive to more than one motor for simultaneous operation, disable the electronic overload protection
(L1-01 = 0) and wire each motor with its own motor thermal overload relay.
Enable motor overload protection (L1-01 = 1 or 4) when connecting the drive to a single motor, unless another motor overload
preventing device is installed. The drive electronic thermal overload function causes an oL1 fault, which shuts off the output
of the drive and prevents additional overheating of the motor. The motor temperature is continually calculated while the drive
is powered up.
n L1-02: Motor Overload Protection Time
Setting Range: 0.1 to 5.0 min
Factory Default: 1.0 min
YASKAWA ELECTRIC TOEP C710636 11E Z1000U HVAC MATRIX Drive Quick Start Guide
Table i.34 Control Circuit Terminal Power Supply
Terminal Signal
S1 to S8, SC
+V, A1, A2, A3, AC, FM, AM
Table i.35 Overload Protection Settings
Description
Disabled the internal motor overload protection of the drive.
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.
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.
i.9 Standards Compliance
Power Supply Specifications
Use the internal LVLC power supply of the drive or an
external class 2 power supply.
87