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Related Manuals for Mitsubishi Electric FREQROL-K Series
Summary of Contents for Mitsubishi Electric FREQROL-K Series
- Page 1 ---- -a-- Single-Phase input (0.37, 0.75Kw)
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Page 2: Table Of Contents
Thank you for your purchase of Mitsubishi Multi-Purpose lnverter FREQROL-K. This is a variable frequency power supply unit to control the speed of squirrel-cage induction motors. This in- struction manual is intended both to explain the unit and to outline operation procedures. some This unit is not difficult to operate, but incorrect operation may lead to troubles, so read this in&ction... -
Page 3: Unpacking
1. UNPACKING After unpacking your FREQROL-K, first check the following points. Refer to the name plate to confirm that the model and the output rating is indeed the one you ordered. (See table 1) If you have any doubts about the above, or find any damage to the unit, please contact your local service representative. - Page 4 resistor of meter equipped with an operation panel in Fig. 1 have already connected. the ougrut terminals U, V and W. (4) It is not always necessary to provide wiring to the reset sv&ch, since the circuit can be restored by cutting off MCCB or Magnetic Contactor (MS) if the output protective circuit has been activated to stop the controller.
- Page 5 Fig. 1 Standard Wiring Diagram Motor Power supply -0 Single-phase 4 2 2 0 V 5OHz or 240V 50Hz FREQROL-K lnvetter Frequency meter resistor , moving 1 mA equtppcd with an operation panel. Model with operation panel l: To input external start signal (across terminals STF, STR and SD), set the switch SWF or SWR to position OFF.
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Page 6: Operations
5. OPERATIONS Points to check before operations After installation and wiring of FREQROL-K is completed, check the following points before opera- ting. if insulation is to be checked with a megger, perform only the test between controller and grounding. Newer perform a megger test between the inverter’s terminals. Also do not perform a megger test on the control circuit terminals. -
Page 7: Operations
x 1 0 x 1 0 x 1 0 0.2 - 3 sec. 1 -15sec. (4) Both the acceleration and deceleration times are set at 5 seconds at shipping. 5-3 Operations When the preparations have been completed, begin inverter operations in the following procedure: (1) First close the MCCB, then the magnetic contactor (MS) by pushbutton. -
Page 8: Operation's Precautions
If the settings of the acceleration or deceleration times are changed during motor operations, the previous settings will remain in memory and the changes will not take effect. Note that this unit is designed for changes in the setting of acceleration and deceleration time to be made at a inverter frequency below 3Hz. -
Page 9: Maintenance And Inspection
6. MAINTENANCE AND INSPECTION The FREQRQL-K is the static type, so almost no daily maintenance is required. The following maintenance practices should, however, be observed. (1) Since the capacitor in the inverter remains charged at high voltage for a while after the inverter is turned off, perform inspections only after charge indication lamp “CHARGE”... - Page 10 7. CONSTRUCTION AND ARRANGEMENT OF INVERTER PARTS As noted above, wiring requires only the removal of -the wiring cover at the bottom of the inverter. T inspect the inverter’s interior, however, proceed as follows: (1) When the wiring cover is removed, the plastic cover’s two set screws will be exposed. Remove these screws and slide the plastic cover upward.
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Page 11: Troubleshdoting And Countermeasure
8. TROUBLESHOOTING AND COUNTERMEASURE In the unlikely event that there should.be problems with the inverter or its should lose any of its functions, use the troubleshooting chart below to identify the cause and apply the appropriate countermeasure. If your problem is not described below, the inverter is out of order, one of the parts has been damaged or if you have any other problem not dealt with here, contact with your local service representation. - Page 12 Is voltage across termi- Poor start switch contact nals STF (or STR) and Transistor fails to functlon when energized. SD greater than 1 V? Has voltage been applied Has volt?- L^- to motor terminals U and V. V and W. and W N o t e 3 .
- Page 13 (2) Motor buzzes and does not run. Does frequency meter fail to change even though Increase inverter capacity Overload causes activation frequency setter has been and motor capacity. of protectron agamst stalls. turned to increase? Motor trouble Note 4: Examrne this with motor disconnected. at constant speed and cannot be controlled.
- Page 14 (5) Motor does not run smoothly Load is too heavy. Increase capacity of motor and inverter. D o e s o u t p u t w o h a g e fluctuctuate? Is voltage out of balance amoung terminals U and lnverter trouble V, V and W, Wand U? Minimize load variation or attach flywheel to motor.
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Page 15: Failures Indicated By Lighting Of Alarm Indication Lamps And How To Deal With Them
Failures indicated by Lighting of Alarm indication Lamps and How to Deal with Them The protective functions car be activated by various conditions, as shown below. If an alarm indication lamp lights up, it is important to keep your head and examine the cause of the problem, and then to apply the appropriate countermeasure. - Page 16 Description Countermeasure Cause Alarm Cooling fan trouble or Activation of the When the fin for cooling ventilation obstruction in power modules is over- temperature detection radiation fin has caused a heated, the temperature relay of the rediation fin. sensor activates to stop rise in temperature, so output remove those troubles.
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Page 17: Measuring Voltage And Current
8-3 Measuring Voltage and Current Since the primary and secondary voltage and current-contain high frequency, data may differ depand- ing upon the instrument used and the circuit to be measured. If you use a measuring instrument for commercial frequency, select one listed in Table 3 and measure the circuit as shown in Fig. - Page 18 Table 3 Terminals to be Measured and Measuring Instrument Power factor at power Measure supply voltage Wl), current at power supply (II) supply (Pl), and calculate power factor using equation sho supply: Pf 1 ce between each Maximum 380V DC frequency during normal operations.
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Page 19: Stand A R D S P E C I F I C A T I O N
9. STANDARD SPECIFICATIONS Item Norminal output (kW) 0.75 0.37 0.9511 .o 4 . 0 TI Maximum output voltage Single-phase 220V or 240V Power source requirement (kVA) Weight (kg) Construction Totally enclosed type IP50 Single-phase AC220VIAC240V 50Hz 198 to 264V Control method Sinusoidal PWM, Voltage-control 1 : 10 ( 6 - 60Hz) o r 1 : 20 (6 - 129Hz) o r 1 : 40 ( 6 - 240Hz) selectable Frequency range... - Page 20 10. PROTECTIVE FUNCTION The protective functions listed below are built into the FR-K Series inverters. When the protective circuits are activated, output is stopped by shutting off the base of the transistor so that the modules are protected. This will cause the motor to stop after a brief free run. To start again, it is neces- sary to either reset by using the reset terminal “RES”, or to turn off and on the power.
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Page 21: Input/Outputtermlnal
11. INPUT/OUTPUT TERMINAL Terminal Rating Description Terminal name symbol Single-phase AC powered supply 220V 50Hz or input terminal 240V 50Hz Be sure to ground both inverter and the panel box Earth terminal which encloses inverter. U.V.W. Output terminals for Connection for three-phase induction motor. motor P.BN Terminals for connection of regenerative brake... - Page 22 Terminal I Description Rating Terminal name symbol Open-collector: L . . . when the commanded frequency is above 3Hz transistor H . . . normally Allowable load 23V DC O.lA Use power supply 24V DC with ripple voltage within 10%. Output terminal that indicates whether the actual 0 utput terminal for SU-SE...
- Page 23 MITSUBISHI ELECTRIC CORPORATION TOKYO MITSUBISHI OENKI ELOG in Jaoan subject to change with...
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