Page 25 Chapter 3 Design D Installing an AC Reactor If the Inverter is connected to a large-capacity power transformer kW or more or the phase advance capacitor is switched, an excessive peak current may flow through the input power circuit, causing the converter unit to break down. To prevent this, install an optional AC reactor on the input side of the Inverter. Other controllers Note Use a special-purpose noise filter for Inverters. If voltage is applied to the output terminals, the internal mechanism of the Inverter will be damaged.
D Never Short or Ground the Output Terminals Caution If the output terminals are touched with bare hands or the output wires come into contact with the Inverter casing, an electric shock or grounding will occur. Page 28 Chapter 3 Design Induction Noise: Electromagnetic induction generates noise on the signal line, causing the controller to malfunction.
Radio Noise: Electromagnetic waves from the Inverter and cables cause the broadcasting radio receiver to make noise. D How to Prevent Induction Noise As described above, a noise filter can be used to prevent induction noise from being generated on the output side.
Page Ground Wiring Chapter 3 Design D Cable Length between Inverter and Motor If the cable between the Inverter and the motor is long, the high-frequency leakage cur- rent will increase, causing the Inverter output current to increase as well. This may affect peripheral devices.
If frequency references are input externally, use a twisted- pair shielded line. Page 31 Chapter 3 Design D Wires to be Used Always use twisted-pair shielded wires to prevent malfunctions due to noise. Wire type Wire size Wire to be used Single wire 0. Page Chapter 4. Installation: Install the Inverter according to installation conditions.
Refer to page Check that all the installation conditions are met. Wiring: Connect the Inverter to power supply and peripheral devices. Refer to page Select peripheral devices that meet the specifications, and wire them correctly. Test Run: Perform a no-load test run and an actual loading test run to check that the motor and peripheral devices operate normally.
Refer to page Check the direction of motor rotation and check that the limit switches operate nor- mally. Page 35 Chapter 4 Preparing for Operation H Function of Each Component D Display Sections Data display section Reference frequency values, output frequency values, output current values, constant settings, and error codes are displayed.
Monitor item indicators When this indicator is lit, an output frequency value Hz is displayed in the data display section. During operation, only the items in the in-service item indicators section can be monitored and the constants for these items can be set. When the Inverter is stopped, all items can be monitored and the constant for each item can be set. Example Indi- Description Page 38 Chapter 4 Preparing for Operation H Monitor Display The 3G3EV allows the user to monitor the reference frequency, output fre- quency, output current, and the direction of rotation.
The constants for basic operations are allocated to dedicated indicators, so the user need not refer to the constant nos. The constants allocated to dedicated indicators can be also set by lighting the PRGM indicator. Page 42 Chapter 4 Preparing for Operation Note 3. Displaying the constant no.
Page 44 Chapter 4 Preparing for Operation Note 2. The DIP switch is located inside the Inverter. Use this switch to change the set- ting when frequency references are to be input in terms of amperage 4 to 20 mA. Value Description Forward rotation Page 46 Chapter 4 Preparing for Operation Note MA is turned on when the difference between the reference frequency and the output frequency falls within 2 Hz.
Page 51 Chapter 4 Preparing for Operation Operation after Recovery from Power Interruption Setting range 0, 1, 2 Factory setting 0 This constant is used to select the processing to be performed after recovery from an instantaneous power interruption.
Value Description Discontinues operation. Continues operation only if power interruption is within 0. Page 52 Chapter 4 Preparing for Operation Note 2. Warning automatically recovered error is not recorded. Error code Description Error category First, start the motor through the Digital Operator without connecting the motor to the mechanical system. Next, connect the motor to the mechanical sys- tem and perform a test run. Page Chapter 5.
The RUN and ALARM indicators on the front panel indicate the current Inverter sta- tus, and the data display section also displays information about an error that has occurred. The data display section also flashes. When warning status arises, no error code is output.
Eliminating the cause recovers the system automatically. Data Description Action In this event, Inverter output is shut off, and the motor coasts to a stop. Check the cause of the error, take the necessary action, and perform fault reset or turn the power off, then on.
The DC voltage of the main circuit dropped below the specified level. Howev- er, all indicators are not lit when a control circuit error occurs. If an Inverter error occurs, turn the power off, then on.
Page Troubleshooting Chapter 5 Operation Troubleshooting If the Inverter or motor does not operate properly when the system is started, constant settings or wiring may be incorrect. In this case, take the appropriate action as described below. If an error code is displayed, refer to Protective and Diagnostic Functions. When the reference frequency is less than 1. Change the reference frequency to 1. If the 3-wire sequence input mode is selected as an external terminal function instead of the actual 2-wire sequence input mode, the motor will not run, in which case change the constant or change to the sequence input that matches the constant setting.
Surge arises when the motor inductive load is connected to the output side of the Inverter. Normally, the maximum surge voltage is approximately three times the power voltage. Failure to heed precautions can result in inju-. Additionally , there may be severe property damage. Caution Indicates a potentially hazardous situation which, if not avoided, may result in minor. The following headings appear in the left column of the manual to help you locate different.
Note Indicates information of particular interest for efficient and convenient operation of the product. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted,. No patent liability is assumed with respect to the use of the information contained herein.
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