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Summary of Contents for Mitsubishi Electric VAR-6A
- Page 1 LZ311Z530H04 AUTOMATIC POWER FACTOR CONTROLLER MODEL VAR-6A VAR-12A User’s Manual Before use, you should read this user’s manual carefully to properly operate this device. Be sure to forward the manual to the end user.
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Page 2: Introduction
Introduction Thank you for purchasing Automatic Power Factor Controller. This instruction manual explains how to install and use Automatic Power Factor Controller VAR series (hereinafter referred to as “device”). Before use, you should read this user’s manual carefully to properly operate this device. We recommend that you keep this manual in a safe place for future reference and read it whenever necessary. -
Page 3: Table Of Contents
Contents Introduction ............................... Check on your delivery ..........................Contents ..............................Safety Precautions ............................. Operation . Features ..............................Functions in each mode ......................... Names and Function of Each Part ......................Explanation of Control and Movement ....................Details of Display of Power Factor Status and Auto/Manual Control Changeover ..... Status of Power Factor ........................ -
Page 4: Safety Precautions
Safety Precautions ■ Working Environment and Working Condition Avoid using this device in the following places. Use in the following places will negatively affect the device lifetime and operations. Do not; ● 5 ℃ 50 ℃ Place where the ambient temperature exceeds the temperature range (- to + ●... - Page 5 ● Use solderless terminal that comply with the size of the electric wire. (Refer to page ) Using inappropriate terminals can cause malfunction device failure / burnout or fire. ● After tightening all the screws be sure to confirm that all the screws are tightened enough.
- Page 6 DC operated type (Model : SRD-T ) or AC operated type (Model : SR-T ) manufactured by Mitsubishi Electric. ● The maximum current must be under A on a common terminals.
- Page 7 ● Set up the applicable delay time to the discharge device of the capacitor (Discharge resistance: over 5 minutes, Discharge coil: over 1 minute), when WARNING the connection/disconnection test with the high voltage circuit is carried out. Carry out the test with the delay time set to be shorter than it should can cause capacitor failure accidents. ● Do not dismantle or remodel this device. CAUTION It can cause malfunction, electrification or fire.
- Page 8 Safety Precautions ■Cautionary Instructions for Maintenance and Inspection ● Wipe off surface with a soft cloth. ● Do not allow chemical cloth to contact for a long time or wipe with benzene thinner or alcohol. ● For correct use of the device perform the following inspection.
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Page 9: Operation
Operation 1. Features This device controls input of capacitor automatically with primary voltage and measured primary current. ■ List of Model Output Function Input Function Model Capacitor Control Signal Forced Disconnection Signal VAR- circuits circuit VAR- circuits circuit 2. Functions in each mode There are following modes in this device. -
Page 10: Names And Function Of Each Part
3. Names and Function of Each Part ■Name and Function of LCD / LED / Operation Key... - Page 12 3. Names and Function of Each Part ■Functions of LCD...
- Page 13 ■A Name and the Work of Terminal. VAR- VAR- TA/S- TA/S- COM1 COM1 COM1 COM1 COM1 COM1 COM1 COM1 COM2 COM2 COM2 COM2 3P3W 3P4W 3P3W 3P4W Terminal Name Terminal Number Detailed Explanation Auxiliary Power Terminals for inputting auxiliary power for this device. Terminal Earthing Terminal Terminal for earthing.
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Page 14: Explanation Of Control And Movement
4. Explanation of Control and Movement 4.1 Details of Display of Power Factor Status and Auto/Manual Control Changeover Details of Display of Power Factor Status and Auto/Manual Control Changeover is shown below. LED for Status of Connection “LEAD OUT” LED LED for Manual ON Control LEAD OUT “PROPER”... -
Page 15: Auto/Manual Control Changeover
4.3 Auto / Manual Control Changeover A control set-up is possible among Manual ON , Manual OFF , and Auto on each capacitor bank. Refer to 5.11 Set-up of Auto/Manual Control (page 37) for the setting method. (a) Manual ON set-up Manual ON set-up (LED for Manual ON control lights up) is done by pressing AUTO / MANUAL Key, and the control signal for each capacitor will close after the Delay Time passes, regardless of the input conditions. (b) AUTO set-up AUTO set-up (LED for AUTO control lights up) is done by pressing AUTO / MANUAL Key, and automatic control will start. If reactive power increases, LAG OUT LED lights up, and the control signal of capacitor will close after the Delay Time passes. If reactive power decreases, LEAD OUT LED lights up, and the control signal of capacitor will open after the Delay Time passes. (c) Manual OFF set-up Manual OFF set-up (LED for ... -
Page 16: Features Of Each Control
4. Explanation of Control and Movement 4.4 Features of each Control The features of each control is shown below. Control name Feature Cyclic control The cyclic control is suitable for controlling capacitors with equivalent capacity. Since the number of the switching operation of the vacuum electromagnetic contactors are made equally, long lifetime can be expected. It is necessary to replace all the contactors at the same time. Priority control The priority control is suitable for controlling the different - capacity capacitor group in stable load circuit which use the large - capacity capacitor on base and adjusts changes of reactive power on the small - capacity capacitors. But since the switching of certain vacuum electromagnetic contactors will become more frequent than those of others, maintenance and inspections must be made frequently and each contactor must be replaced at the end of their respective lifetime. Optimal control The optimal control is suitable for controlling the different - capacity capacitor groups in the circuit where load fluctuation is frequent. But since the switching of vacuum electromagnetic contactors become frequent and not equal, the maintenance and inspections must be performed frequently and each contactor must be replaced at the end of their respective lifetime. 4.5 Cyclic Control Operation ■ In the cyclic control, the number of the Cyclic Control Opration switching operation of each capacitor circuit are made equally. ■ At the time of turning on the power supply, the connection begins with C1 increase decrease increase increase and proceeds as follows: decrease C1→C2→C3→C4→C5→C6 Load Change decrease ... -
Page 17: Priority Control Operation
4.6 Priority Control Operation ■ In the priority control method, priorities Priority Control Opration are attached to the connection and disconnection of each capacitor. ■ Upon turning on the power supply, the connection sequence begins with C1 and proceeds as follows: increase decrease increase increase C1→C2→C3→C4→C5→C6 decrease Load Change decrease It operates as follows at the time of 12 circuits. C1→C2→………→C11→C12 ■ In the disconnection sequence, disconnection proceeds sequentially, starting from the last capacitor circuit the number of connection banks that was closed. In other words, it proceeds in the reverse order of the connection sequence. -
Page 18: Optimal Control Operation
4. Explanation of Control and Movement 4.7 Optimal Control Operation ■ In the optimal control connection and Optimal Control Opration disconnection is selectively performed for one capacitor circuit with the most appropriate capacity that will keep the lagging reactive power within the Time target power factor. -
Page 19: Capacitor Changing Control At Optimal Control Operation
4.8 Capacitor Changing Control at Optimal Control Operation ■ Optimal control is suitable for circuits with sharp load fluctuation. However in case the load decreases gradually when multiple capacitors are closed capacitors will open from the smallest capacity and the capacitor with the largest capacity will remain last. ■... -
Page 20: Light Load Disconnection Operation
4. Explanation of Control and Movement 4.9 Light Load Disconnection Operation ■ In order to prevent overloading under light load conditions, the closed capacitors are sequentially cut off when the load falls below the power value determined from the low load power ratio setting value. (Please refer to page 32 about the calculation formula of the light load power ratio.) ■ When the active power decreases and the LIGHT LOAD LED lights up and this condition continues for the Delay Time, one capacitor circuit is cut off. Thereafter, one capacitor circuit is cut off each time the Delay Time passes as long as the LIGHT LOAD LED lights up. ■ When EXPORT LED lights up, the same operation as the case when LIGHT LOAD LED lights up is carried out. ■ The order of disconnecting capacitor is as follow: ① In cyclic control, capacitor circuits are turned OFF. This starts from the first capacitor circuit where the connection signal is outputted. (Disconnection proceeds in the same order as connection.) ② In priority control, capacitor circuits are turned OFF. This starts from the last capacitor circuit where the connection signal is outputted. (Disconnection proceeds in the reverse order of connection.) ③ In optimal control, capacitor circuits are turned OFF in order of the output terminal number. This starts from the lowest terminal number. LEAD LEAD OUT Disconnection Level EXPORT Active Power PROPER Connection Level LAG OUT... -
Page 21: Forced Disconnection Operation
When the signal across the input terminals becomes OFF the control begins. , 25 Please use the applicable for the switching of mA DC for shorting. Example of Control by Time Switch Contact signal across TA/S- and TB VAR-6A VAR-12A 20 Time Time Switch Capacitor Automatic Capacitor TA/S-... -
Page 22: Set-Up
5. Set-up 5.1 Flow of Set-up (Measure Set-up Mode) In order to perform control and measurement it is necessary to set-up Phase/Wire Type Primary Voltage Primary Current etc. in Measure Set-up Mode. It changes from Operation Mode to Measure Set-up Mode and required items are set-up. - Page 23 The setting method ● ① It changes to Measure Set-up Mode by pressing Key and Key for seconds simultaneousl y. ENTER CAPACITY ② ＋ − It changes to each set-up menu by pressing Key or Key. ③ Set-up in each menu. (Please refer to page to page ④...
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Page 24: Flow Of Set-Up (Control Set-Up Mode)
5. Set-up 5.2 Flow of Set-up (Control Set-up Mode) In order to perform the detailed control set-up, it is necessary to set-up Target Power Factor, Delay Time, Capacity, etc. in Control Set-up Mode. It changes from Operation Mode to Control Set-up Mode, and a required item has to be set-up. The items you do not set up are the initial contents. (Please refer to the page 50 for the initial contents.) Please refer to after page 30 for the setting details. Operation Mode Control Set-up Menu 1 Control Set-up Menu 2 Control Set-up Menu END (Target Power Factor) (Light Load Power Ratio) ＋ ＋ ＋ Measurement Display − − − SET CONT. ENTER DISPLAY ENTER DISPLAY ENTER DISPLAY Target Power Light Load Factor Power Ratio ENTER *save the ENTER ENTER settings ＋ − ENTER *cancel the setting... - Page 25 Capacity Manual Input of C ENTER DISPLAY ENTER DISPLAY Capacity Manual Input of C ENTER *1: In VAR-6A, it is C6. In VAR-12A, it is C12. 1． ： Note Press Key ： Press Key for over seconds. When Combination ON/OFF...
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Page 26: (Set-Up Of Phase/Wire Type ･ Using Vt/Direct Input ･ Primary Voltage ･ Primary Current)
5. Set-up 5.3 Measure Set-up Menu 1 (Set-up of Phase/Wire Type · Using VT/direct input · Primary Voltage · Primary Current) How to set up measurement. Measure Set-up Menu END is displayed by pressing Key and Key for seconds ENTER CAPACITY simultaneously in Operation Mode. - Page 27 Continuation of Measure Set-up Menu 1 From the previous page. Set up Secondary Voltage of VT . ENTER DISPLAY 63.5 V 100 V 110 V ＋ − 115 V ⑤ Secondry Voltage 120 V Note 1. A setting value is phase to neutral voltage. Note 2.
- Page 28 5. Set-up Continuation of Measure Set-up Menu 1 From the previous page. Set up Primary Current of CT (special) . 5.00 A ENTER DISPLAY ＋ − ⑨ Special Primary Current 99.0 A 100.0 A 110.0 A Note 1. When other settings except for “SP” are selected in, skip this set-up. Note 2.
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Page 29: Measure Set-Up Menu 2 (Setup Of Combination)
5.4 Measure Set-up Menu 2 (Setup of Combination) How to set up combination. (When the cyclic control with combination is not used no this setting change is required.) Combination setting is used to increase the number of controllable capacitor circuits by using two units of this device with the cyclic control. -
Page 30: Control Set-Up Menu 1 (Set-Up Of Target Power Factor)
5. Set-up 5.5 Control Set-up Menu 1 (set-up of Target Power Factor) How to set up target power factor. Control Set-up Menu End is displayed by pressing Key for seconds in SET CONT. Operation Mode. ＋ − Key or Key. Then the following set-ups are possible. -
Page 31: Control Set-Up Menu 2 (Set-Up Of Light Load Power Ratio)
5.6 Control Set-up Menu 2 (Set-up of Light Load Power Ratio) How to set up light load power ratio. Control Set-up Menu END is displayed by pressing Key for seconds in SET CONT. Operation Mode. ＋ − Key or Key. Then the following set-ups are possible. - Page 32 5. Set-up Continuation of Control Set-up Menu 2 Light Load Power Ratio is a setting value for Light Load Disconnection of a capacitor. Light Load Disconnection is a function that forces the disconnection of all capacitors when the light load active power falls below the power required by the light load power ratio to prevent power factor from leading out too much.
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Page 33: Control Set-Up Menu 3 (Set-Up Of Delay Time)
5.7 Control Set-up Menu 3 (Set-up of Delay Time) How to set up delay time. Control Set-up Menu END is displayed by pressing Key for seconds in SET CONT. Operation Mode. ＋ − Furthermore Control Set-up Menu is selected by pressing Key or Key. -
Page 34: Control Set-Up Menu 4 (Set-Up Of Control Method)
5. Set-up 5.8 Control Set-up Menu 4 (Set-up of Control Method) How to set up control method. Control Set-up Menu END is displayed by pressing Key for seconds in SET CONT. Operation Mode. ＋ − Furthermore Control Set-up Menu is selected by pressing Key or Key. -
Page 35: Control Set-Up Menu 5 (Set-Up Of Capacity)
ENTER Note 1. This set-up is skipped when “Auto” is selected in “Capacity Auto/HoLd”. Note 2. VAR-6A is the circuit 1 to 6, and VAR-12A is the circuit 1 to 12. Note 3. The flickering digit can be changed. Choose whether to complete the set-up refer... -
Page 36: Test Menu (Operation Tests For The Connecting/Disconnecting)
Note 1. The circuit set as “Manual ON” and “Manual OFF” does not connect or disconnect. Note 2. Automatic recognition of a capacity cannot be performed in the connection of a test. Note 3. 1 cycle is circuit 1 to 6 in VAR-6A, and circuit 1 to 12 in VAR-12A. ・... -
Page 37: Set-Up Of Auto/Manual Control
5.11 Set-up of Auto/Manual Control Change of MANUAL ON / AUTO / MANUAL OFF is performed by pressing the AUTO/MANUAL Key of the applicable circuits after status of lock is released. A status of lock is released by pressing Key for seconds. -
Page 38: Operation
6. Operation 6.1 Changing of the Display The display element switches by pressing Key. DISPLAY ＜Power Factor＞ ＜Power Factor + Active Power＞ ＜Power Factor + Reactive Power＞ DISPLAY DISPLAY DISPLAY DISPLAY ＜Power Factor + Voltage＞ ＜Power Factor + Current＞ ＜Power Factor + Apparent Power＞ DISPLAY DISPLAY 6.2 Changing of the Phase... -
Page 39: Display Of Capacity
Key, or Key, or Key. SET CONT. DISPLAY ENTER ＊VAR-6A is the circuit 1 to 6, and VAR-12A is the circuit 1 to 12. 6.4 Reset of Capacity y t i / o t y t i CAPACITY Key and Key for seconds simultaneously in Display of Capacity. -
Page 40: Others
7. Others 7.1 Operation ■Operation of device other than “Operation Mode” Display The output point of contact for Status Measurement Measurement Power Factor capacitor control (LCD) Status (LED) For several seconds A measurement No display. All the circuits are “open” . after the auxiliary power is not possible. -
Page 41: Troubleshooting
7.2 Troubleshooting If unusual sound smell emitting smoke or fever occur from the device turn off the power immediately. If there is a problem confirm the following points before taking out to repair. Phenomenon Possible causes Countermeasure Setting value in Measure Set-up Mode is “The Set Value Please return to Operation Mode and change can not be changed. -
Page 42: Installation 1. Dimensions
Installation 1. Dimensions VAR-6A M4 screw M3.5 screw ＶＡ Ｒ−６ Ａ CONTROL SETTING TARGET POWER FACTOR LIGHT LOAD TA/S- POWER RATIO DELAY TIME CONTROL COM1 METHOD １：CYCLIC ２：PRIORITY ３：OPTIMAL COM1 COM1 C RESET SET MEASURE ー ＋ ENTER PHASE DISPLAY CAPACITY SET CONT. -
Page 43: Attachment
Installation 2. Attachment 1 Panel Cutout Cut out the panel like the below. Panel Cutout (It is possible to attach the device on a board from 1.6 mm to 4 mm.) [mm] 2 Attachment Location Contrast of LCD changes if looked at different angles. The optimal angle is as follows. -
Page 44: Wiring
Installation 3. Wiring 1 Solderless Terminal Use solderless terminal that comply with the size of the electric line. Connecting Completion Output terminal Disconnecting Completion Output terminal Connection Disable Input terminal Disconnection Disable Input terminal Control Signal Output terminal Forced Disconnection Signal terminal Current Input terminal Voltage Input terminal Auxiliary Power terminal... - Page 45 Do not perform hot-line jobs. Do not perform hot-line work. It can cause on electrification electric burn fire and damage by fire on apparatus. Installation of protection fuse etc. is recommended to VT and auxiliary power. Do not open the secondary side of CT circuit. Correctly connect the secondary side signal of CT to the CT connection terminal.
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Page 46: Wiring Diagram
Use input contacts suited for the switching of mA DC. *This signal can be used for the following applications. ① To disconnect the capacitor by an external time switch for purpose VAR-6A of avoiding leading-out of power factor during night time. VAR-12A Our recommended type: ... - Page 47 4 5 6 VZ□-□E-E VZ□-□L-E Note1. In VAR-6A, C□X in the figure shows C1X to C6X. Note1. In VAR-6A, C□X in the figure shows C1X to C6X. Note2. In VAR-12A, C□X in the figure shows C1X to C12X. Note2. In VAR-12A, C□X in the figure shows C1X to C12X.
- Page 48 COM2 COM2 VAR-12A VAR-12A Note 1: VAR-6A does not have “C7-C12” and “COM2” does not exist. Load Note 2: Combination of VAR-6A and VAR-12A is possible. Note 3: When “Combination ON/OFF” set-up is “ON”, the cyclic control operates. 10 Without VT 3 3W...
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Page 49: Specifications
LEAD OUT, PROPER, LAG OUT, LIGHT LOAD, EXPORT, FORCED DISCONNECTION Display Conditions of Connection / VAR-6A: output conditions of connecting/disconnecting signals for capacitor C1 to C6. Disconnection for Capacitor VAR-12A: output conditions of connecting/disconnecting signals for capacitor C1 to C12. -
Page 50: Set-Up Table
Specifications Set-up Table VAR-6A Set-up Menu No. Set-up Item Initial Content VAR-12A Notes ○ ○ 1.1.1 Phase/Wire Type 3P3 (3 3W) ○ ○ YES (Using VT) 1.1.2 Using VT/direct input ○ ○ 1.1.3 Direct Voltage(3 3W) 110 V ○ ○... - Page 51 MEMO...
- Page 52 Vte. Agua Santa 4211 Casilla 30-D (P.O. Box) Vina del Mar, Chile +56-32-2-320-600 Mitsubishi Electric Automation (China) Ltd. Mitsubishi Electric Automation Building, No.1386 Hongqiao Road, Shanghai, China 200336 +86-21-2322-3030 Mitsubishi Electric Automation (China) Ltd. 5/F,ONE INDIGO, 20 Jiuxianqiao Road Chaoyang District, Beijing, China 100016...
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