PFC-10 Power Factor Controller

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1 PFC-10 Power Factor Controller Instruction Manual Ver. 6.0 / 2002 ( update)

2 Table of Contents Page Subject 3 Starter ion 4-5 Installation Notes 6-7 Terminals Review & Control Wiring 8 Front-panel Settings 9 Motor Protection 10 Start-up Procedure 11 Dimensions 12 Technical Specification Safety Read this manual carefully before operating the equipment and follow its instructions. Installation, operation and maintenance should be in strict accordance with this manual, national codes and good practice. Installation or operation not performed in strict accordance with these instructions will void manufacturer's warranty. Disconnect all power inputs before servicing the soft-starter and/or the motor. Warnings 1. This product was designed and tested for compliance with IEC for class A equipment. 2. Use of the product in domestic environments may cause radio interference, in which case the user may be required to employ additional mitigation methods. 3. Utilization category is AC-53a or AC53b. Form Unit must be grounded to ensure correct operation, safety and to prevent damage. The company reserves the right to make any improvements or modifications to its products without prior notice. 1

3 Introduction The PFC-10 is used to continuously improve the Power Factor of the operating facility through controlling 6 or 12 capacitor steps. It monitors mains voltage, current, Power and Active/Reactive Power. To accurately calculate Power Factor, the PFC-10 uses Voltage, Current and Reactive Power. When the inductive current is higher than the pre-adjusted setting, the controller will initiate an "Add Capacitor" demand to connect the appropriate capacitor steps. Similarly, when the inductive current is below a calculated level, a "Reduce Capacitor" demand for disconnection will be initiated. The PFC-10 also provides nine alarm indications such as, powerfactor deviation from the target setting and Total Harmonic Distortion (THD) exceeding a preset value. Calculating correction KVAR Total capacitor value in KVAR (Qc) necessary to correct power factor from Orig. PF to a value of 0.95 Mounting Insert the PFC-10 through the cut-out (138 x 138mm), install the right and left clips as follows: 1. Slide opening onto the stand-off Use stand-off 1 as pivot and slide-turn the clip until it snaps into stand-off Turn the screw until the PFC-10 holds firmly. Notes: Do not mount the PFC-10 near heat sources Protect the PFC-10 from dust and corrosive atmospheres. 2 1 Original. PF K1 K Where calculation of Qc is made with K 1 or K 2 as coefficients. K 1 = Factor by which the maximum original load (S) in KVA is to be multiplied to find correct sum of capacitors in KVAR, hence, Qc=K 1 x S K 2 = Factor by which the original maximum R.M.S. Current (I) in ampere is multiplied, to obtain the capacitor value in KVAR, hence, Qc=K 2 x I 2

4 Wiring Rear Panel Plug A - Voltage & Current measurement inputs. Plug B - Supply Voltage (115, 230 or 400V) Plug C - Output Relays for Capacitor steps 1-6 and alarm contact. Plug D - Output Relays for Capacitor steps 7-12 (available in 12 step controllers only). Plug E - Communication. RS485, Modbus protocol.d- Phase to Neutral Connection Supply Voltage & Voltage/Current Measurements are measured on the same phase Voltage & Current inputs Terminal 1 - Connect to one of the Phases Terminal 2 - Connect to Neutral Note: protect with 1A fuse Terminals 3 & 4 - Connect to C/T Note: C/T must be installed on the same phase where voltage is measured. Supply Voltage Terminal 5 - if voltage is 400V, phase to neutral. Terminal 6 - if voltage is 230V, phase to neutral. Terminal 7 - if voltage is 115V, phase to neutral. Terminal 8 - Connected to Neutral. Terminal 9 - Connect to Ground Relay Outputs Terminal C - Common for all capacitor relays Terminal C1 to C6 - Relay outputs Terminal AL0 - Alarm relay common Terminal AL1 - Alarm relay N.O (common Terminal AL2 - Alarm relay common Terminal C7 to C12 - Relay outputs (12 step only) RS485 Comm. - with Modbus RTU protocol. Alarm Relay The alarm relay is a C/O contact using fail safe logic. When the PFC-10 is energized the relay energizes closing (AL 0 - AL 1 ). When fault or supply loss occurs, the contact closes (AL 0 - AL 2 ). Communication (optional) Serial RS485 communication with Modbus RTU protocol allowing up to 32 PFC's connected onto a twisted shielded pair, with speeds of baud. General The PFC-10 is designed for connection to three phase systems, with or without neutral wire. Note: When Supply Voltage & Voltage Measurement are identical, jumpers may be connected between: Terminals 1 & 5 or 6 or 7 (depending on the voltage) Terminals 2 & 8 3

5 Wiring Phase to Phase Connection Voltage Supply & Voltage Measurement are connected between two phases. Current is measured on the third phase. Voltage & Current inputs Terminal 1 - Connect to one or of the Phases Terminal 2 - Connect to any other phase Note: protect with 1A fuse Terminal 3 & 4 - Connect to C/T Note: C/T must be installed on the third phase where voltage is not measured. Supply Voltage Terminal 5 - if voltage is 400V, connect to a phase Terminal 6 - if voltage is 230V, connect to a phase Terminal 8 - Connect to any other phase. Terminal 9 - Connect to Ground Note: Capacitor contactors will be operated by Phase to Phase voltage(use transformer for other voltages). Relay Outputs Terminal C - Common for all capacitor relays Terminal C1 to C6 - Relay outputs Terminal AL0 - Alarm relay common Terminal AL1 - Alarm relay N.O (common Terminal AL2 - Alarm relay common Terminal C7 to C12 - Relay outputs (12 step only) RS485 Comm. - with Modbus RTU protocol. Phase to Neutral & Phase to Phase connection Phase to Neutral Supply Voltage, Phase to Phase Voltage Measurement, current is measured on the third phase. Voltage & Current inputs Terminal 1 - Connect to one or of the Phases Terminal 2 - Connect to another phase Note: protect with 1A fuse Terminals 3 & 4 - Connect to C/T Note: C/T must be installed on the third phase where voltage is not measured. Supply Voltage Terminal 5 - if voltage is 400V, phase to neutral. Terminal 6 - if voltage is 230V, phase to neutral. Terminal 7 - if voltage is 115V, phase to neutral. Terminal 8 - Connected to Neutral. Terminal 9 - Connect to Ground Relay Outputs Terminal C - Common for all capacitor relays Terminal C1 to C6 - Relay outputs Terminal AL0 - Alarm relay common Terminal AL1 - Alarm relay N.O (common Terminal AL2 - Alarm relay common Terminal C7 to C12 - Relay outputs (12 step only) RS485 Comm. - with Modbus RTU protocol. Note: See technical specification for voltage ranges 4

6 Display LED and Seven Segment Displays The LED identifies the parameter shown on the seven segment display. By pressing the SELECT key the following parameters can be reviewed without interrupting the controller's regular operation. Notes: 1. The INT fault will lock the display. Resetting can be done by pressing RESET key on the front panel or by disconnection of voltage input. 2. When current in the internal C/T is below 0.5% of nominal, the display shows: AUTO MAN. FAULT PROG P.F V P Q THD I 0 [+] [-] The PFC-10 will trip open all connected steps and remain in operation mode. PF (Cos F) - The display shows the actual Power Factor of the system. First position on the left shows whether Cos F is inductive or capacitive. 3. Upon connection to control supply, the PFC performs internal test ending with the message: AUTO MAN. FAULT PROG Example: 0.95 Inductive Example: 0.98 Capacitive The front panel incorporates twelve additional LEDs displaying PFC-10 status. P.F V I P Q THD Good [+] [-] Led Symbol Led Illuminates when Controller operates in normal mode. Man Controller operates in manual mode Fault Alarm is initiated for a fault (see fault list). Prog Controller is in Programming mode. PF & When Power Factor is displayed and HPF flashes when Historical PF is displayed. V When mains Voltage (V) is displayed. I When mains Current (I) is displayed. P When active Power (KW or MW) is displayed Q When Reactive Power (KVAR ormvar) is displayed. THD When THD is displayed (%). (+) Add Indicates a demand to add capacitor steps to meet the preset power factor target. (-) Indicates a demand to reduce capacitor Reduce steps to meet the preset power factor target 1-12 When capacitor steps 1-12 are connected. Following this test, the last average historical value will be displayed for few seconds and the PF LED flashes: P.F V P Q THD AUTO MAN. FAULT I PROG After which the unit returns to its last operating mode, either AUTO or MAN. [+] [-] 5

7 Controller Menu Press Press Man. Press Man. Press Man. to scroll between the measured data displays simultaneously to enter parameter review mode. for 7 sec. simultaneously to enter into program mode. simultaneously to enter into TEST mode. Press or Press or to modify to scroll the programmed parameter values parameter values. Press and simul. to store default parameters Display Pages Review Page Program Page Test Page Display power factor Smallest Capacitor Smallest Capacitor Press Press Press UP to test Historical power factor C/T Ratio C/T Ratio Software Version Press Press Press Phase Voltage Number of used steps Number of used steps Test Restore default parameters Press Press Press Phase Current Switching Program Switching Program Press Press Phase Power Single or Three phase 5 1. P H Single or Three phase Press Press Apparent Power Target Power Factor Target Power Factor Press Press Total Harmonic Distortion Wrong Power Factor Press Initial Time Delay 8 0 Press Add a step time delay Press Wrong Power Factor Initial Time Delay Add a step time delay Center line Origin Center line Origin Press Threshold (limitation) Press Rated Capacitor Voltage Press Threshold (limitation) Rated Capacitor Voltage P/T Ratio P/T Ratio Reset Statistics Press THD Fault 4. o F F THD Fault Press Fast Step connection mode Press One or Four quadrants Press 5. o F F 6. o n E Fast Step connection mode One or Four quadrants Com link number Com link number Press Baud Rate Baud Rate Press Statistics reset (Only via comm.) Statistics reset (Only via comm.) 6

8 Controller Settings The controller is supplied from the factory with Default Parameter settings. Most of these settings are suitable for standard applications. To review and / or change the parameters, proceed as follows: Press AUTO/MAN and SELECT for 7 seconds. The PROG LED and the display will show: Parameter number flashes Parameter value In review mode, and are used to scroll between the parameters. In PROG. mode these keys are used to increase or decrease parameter values until desired value is reached. Press AUTO/MAN and SELECT to review the programmed parameters. There are 18 parameters to review or modify: 1. Capacitor value (Smallest used) 2. C/T ratio 3. Number of Contactors Used. 4. Switching Program 5. Connection Mode. 6. Target Power Factor 7. Wrong Power Factor Alarm. 8. Initial (add) Time Delay. 9. Time Delay Between Steps 10. Center Line. 11. Threshold. 12. Capacitor Rated Voltage 13. P/T ratio 14. THD alarm 15. Fast Capacitors connection control 16. One or Four quadrants 17. Communication link address 18. Communication baud rate 19. Statistical data reset (via communication only) Storing Modified Parameters Press and keys simultaneously to store the modified Parameter in the non-volatile memory after every modification. The display will respond with, G o o d indicating that the parameter was correctly stored. Recalling Default Parameters It is always possible to return to the Default Parameters by pressing and keys simultaneously. The display indicates: entering into TEST mode. Press The display indicates: the software version Press The display will flash: Press +- and keys simultaneously to store the Default Parameters in the non-volatile memory. The display will respond To return to your previous selected settings, without storing the Default Parameters in the non-volatile memory, press Man keys. Note: If parameters where not stored, and AUTO/MAN and SELECT were pressed during PROG. mode all modifications will be erased. To confirm correct storage of the new parameters enter Parameters review mode by pressing AUTO/MAN and SELECT twice and check the programmed values. 7

9 Controller Settings Initiation When all connection are correct, upon initial power-up the controller displays the measured Power Factor with AUTO and PF LEDs illuminated. Test Mode P.F V P Q THD Man To switch into TEST mode (AUTO LED ), press the keys simultaneously. The controller continues to operate regularly, according to the last stored settings. Use the to perform the controller internal TEST routine or the to view software version, AUTO Pressing again will show a flashing screen with DFLT (Default Parameters). To store the Default parameters in the non-volatile memory press both and keys together. Pressing again will display the flashing STAT.message, where reseting the statistics is performed by pressing and keys simultaneously and automatically returning to MAN.or AUTO modes. To switch out from MAN. FAULT I PROG [+] TEST mode, press keys together twice. The controller will return to the previous MANUAL or AUTO mode. Note: The controller will be switched out of TEST mode automatically if no change has been made in last 5 minutes. [-] Parameter Review Mode To switch into parameter review mode (AUTO LED ), press the keys simultaneously for 1 second. The controller continues to operate regularly, according to the last stored settings. When the first digit of the seven-segment display is flashing or keys are used to scroll between all 18 parameters. No modification is possible in this mode. To modify parameters, press and hold for 7 seconds. To switch out of preview mode, press keys simultaneously. The controller will return to the previous MANUAL or AUTO mode. Programming Mode To switch into programming mode (AUTO or MAN. and PROG LEDs ), press and hold the keys for 7 seconds. The controller continues to operate regularly, according to the last stored settings. Use the or keys to modify parameter value. To store the new value in the non-volatile memory press both and keys simultaneously. To switch out of programming mode, press the two keys together. The controller will return to the previous MANUAL or AUTO mode. Note: Except for parameter review or change, the controller should not be left in the PROG mode. Manual and matic Modes To switch into manual mode (MAN and PF LEDs illuminate), press and hold the key for 5 seconds, this mode enables addition or reduction of capacitor steps with the or keys (5 seconds delay). To switch out from this mode, press and hold the key for 2 seconds. Note: For regular operation, the controller should always be set to automatic mode (AUTO LED ). 8

10 Operation Parameters The controller has two limit lines. The upper one is for adding capacitor steps, and the lower one is for reducing capacitor steps. If the actual reactive current is above the upper limit an "Add" capacitor demand will be initiated. If the actual "Reactive" current is below the lower line, then a reduce capacitor command will be initiated. If however, the actual reactive current is between the two limit lines, no "Add" or "Reduce" commands will be initiated. The characteristics of the PFC-10 are controlled by the following parameters: C/K Value The C/K value determines the distance between the two limit lines, which is two times the C/K value. This value is greater than 1 (1 = reactive current of one capacitor step), to prevent "hunting" (in-out frequent switching) of the capacitor steps. If however, the centerline value is (-1), then the minimum power factor value will be the target power factor. (i.e. if the actual power factor will be lower than the target power factor, an "Add" capacitor command will be initiated). C/K value depends on: Capacitor step size (Qc, in var), System voltage (U=line to line voltage, in volts) C/T ratio (K), C/K is automatically calculated by the PFC-10 controller Note: If selected switching program allows for different capacitor step ratings, use the lowest capacitor step size for Qc value. However, if the switching program is and for some reason the capacitor steps are not identical, then use the highest capacitor step size for Qc value. Target Power Factor The target power factor determines the slope of the limit lines. This is the power factor value, which the controller aims to reach. If the center line value is (+) the maximum power factor value will be the target. (i.e. if the actual power factor will be higher than the target power factor, then a "Reduce" capacitor command will be initiated) Adjustment range: 0.80 inductive to 0.95 capacitive Default parameter: 0.92 Center Line Origin (CLO) The centerline is the middle line between the upper and lower limit lines. By default it is located one C/K value from both lines. The origin of the centerline can be moved upward and downward in steps of 0.5 C/K. If the CenterLine Origin value is (0), the average (over a prolonged period of time) power factor value will be the target power factor. Adjustment range: -1 to 2, in steps of 0.5 Default parameter: -1 Note: It is recommended to leave Center Line Origin (CLO) setting at the default value of (-1) to ensure that actual power factor will never decrease below target power factor. 9

11 Operation Parameters Threshold This parameter determines the controller operation mode at low loads. It is designed to prevent a low capacitive power factor at low loads. If, for example, the value of the CenterLine Origin is set to (-1), and the load decreases to a low level, the power factor could be a very low capacitive value. The Threshold is designed as an additional term for the logic operation of the controller. Graphically it could be observed as three horizontal threshold lines (lower, center and upper). An Add Capacitor Command can be accepted only if the operation point is both above the threshold upper line and above the upper limit line. A Reduce Capacitor Command can be accepted if the operating point is below either the threshold lower line or the lower limit line. Note: If the Target Power Factor value is set to 1 or to capacitive value, the Threshold is automatically set to off. Note: It is recommended to leave Threshold setting at the default value of (+1) to prevent over correction (very low capacitive power factor) at low loads. Adjustment range: -1 to +1, in steps of 0.5 Default parameter: +1 10

12 Parameter Description 19 parameters may be modified to suit every application 1. Capacitor Value Capacitor value can be programmed to any value KVAR Default parameter: 20 KVAR 2. Current Transformer Ratio Enter the ratio of the current transformer, eg :500/5 = Default parameter: Number of Contactors Used There are two types of controllers: PFC-10-6, for 1-6 capacitor steps PFC-10-12, for 1-12 capacitor steps. Display: Default parameter: 6 steps 4. Switching Program See program list on the following page. Default parameter: Connection Mode There are two methods for PFC-10 voltage measurement: Phase to neutral P H Phase to phase P H Default parameter: Phase to Neutral (1PH) Note: Wrong setting will activate the Alarm Relay. 6. Target Power Factor Adjust the value to the desired power factor Default parameter: Alarm Power Factor Operates the alarm fail-safe relay if the the desired power factor was not reached within 10 minutes Default parameter: Initial Time Delay The time delay before the first of capacitor step is switched "On". 8 0 Default parameter: 0 sec. 9. Time Delay between steps The time delay between steps, after the first step is already "On" Default parameter:10 sec. 10. Center Line Origin Location of the center line in the parallel shifting. See pages Default parameter: -1.0 Note: Period after the first digit signifies that the descriptive number is above 10, eg. 0. = 10, 1. = Limitation of hysteresis Threshold to prevent switching back and forth (Hunting) See pages Default parameter: Capacitor Rated Voltage The rated voltage on the capacitor name-plate (helps in accurately calculating the PF knowing the current Default parameter: Potential Transformer Ratio Enter the ratio of the Voltage transformer, eg:3300/110 = Default parameter: THD operation, Off, 3-20% Switching the THD alarm 3-20% or Off through software programming. THD measures harmonics in the basic RMS wave, directly up to the 9th harmonic with reduced accuracy up to the 25th harmonic. 4. o F F Default parameter: off 11

13 Parameter Description 15. Fast Capacitor Step Switching Enables/disables fast switching and time saving for large loads where capacitor switching takes valuable time. 5. o F F Default parameter: off 16. Quadrant selection Using One quadrant permits connection of current transformer without importance to its polarity. When using Four Quadrants a regenerating system may be involved, therefor the polarity becomes crucial in this connection. b. o n E Default parameter: one 17. Communication Link Number Enter the number you wish to numerate your link in the range of Default parameter: 248 = Off 18. Baud Rate (bit per second) The communication link Baud Rate using the range between Default parameter: 96 (9600 bps) 19. Statistical Reset Available for access only through communication, allows statistical data reset (Historical PF) via comm. Switching Program - Parameter #4 ed out of the following switching programs: (4.111) All steps are equal KVAR FIFO-First In First Out (4.FIF) Add (4.222) First step is 1/2 rating of all other steps (4.122) First two steps are 1/2 rating of all other steps (4.233) First step is 1/3 rating, second step is 1/2 rating of all other steps (4.244) First step is 1/4 rating, second step is 1/2 rating of all other steps Reduce (4.236) First step is 1/6 rating, second step is 1/3 rating, third step is 1/2 rating of all other steps (4.248) First step 1/8 rating, second step 1/4 rating, third step 1/2 rating of all other steps

14 List of Parameters and Default Setting Press AUTO/MAN and SELECT for 7 seconds and then press SELECT to review or UP-DOWN ARROWS to modify the parameter. Parameter Number Parameter Description Adjustment Range Default Setting 1 Capacitor Value in KVAR C/T ratio Number of steps used Switching program Note: Since the first step is always 1 and steps 5 and higher are always identical to step 4, the program shows steps 2, 3 and FIFO 4 F I F Connection mode 1 or 3 Phase (1PH-3PH) 5 1. P H 6 Target power factor 0.80 ind. to 0.95 cap Wrong power factor alarm 0 = Off, 0.80 Ind. to Initial (add) time delay sec Time delay between steps sec Center Line Origin (Parallel shift) (-1) to (+2) Threshold (Limitation) (-1) to (+1) Rated Capacitor Voltage P/T Ratio THD fault 3-20, 21 = off 4. o F F 15 Fast Mode On, Off 5. o F F 16 One or Four Quadrants One, Four 6. o n E 17 Comm. link number (248 = off) Baud rate (Comm link speed) Statistical reset only through comm. link

15 Communication The PFC incorporates RS485 with Modbus RTU Protocol, operating at baud rate of 1200 to 9600 bits/sec. RS-232 For programming and supervision of single units via IBM-PC or compatible. Use our RS converter. RS-485 Serial link allows connection of up to 32 PFC's to the host computer. For detailed information see Communication Manual. 1 An optional basic beta communication package is available. The package includes: 1. Windows based package 2. Communication cable with RS converter 3. Communication Manual Up to 32 PFC s can be connected on a twisted pair RS Converter Standard D-Type containing RS485 with MODBUS protocol. View described from back of PFC-10. Pin # I / O Description 1 I / O RS485 (+) 9 I / O RS485 (-) 14

16 Trouble Shooting Fault PFC-10 does not function and no LEDs 0 1. c o S 2. c o n 3. o. c. 4. t H d 5. i n t E r r 1 E r r 2 E r r 3 E r r 4 Controller operates, PF display shows: is displayed, and Fault LED A Add Low Cos F B Low Cos F Reduce ON [-] Power factor is below target value when all capacitor steps are switched ON. is displayed, and Fault LED Capacitor steps do not switch ON automatically, in spite of low power factor. is displayed and Fault LED is displayed and fault LED is displayed, Fault LED In MAN mode, steps are not switched ON/OFF when pressing UP + DOWN keys. is displayed and Fault LED is displayed and Fault LED is displayed and Fault LED is displayed and Fault LED Possible Cause No voltage or wrong voltage connection Very low current input. Check that current exceeds 0.5% of rated current. Check current display (I LED on) and input connection. Wrong power factor for over 10 minutes. Check that: All parameters are properly calculated and stored. Setting of the Number of Connected steps is correct. Contactor control and power are properly connected. Contactor and capacitor fuses are O.K. Check voltage & currents are measuring the same phase The total amount of available capacitance is not enough to reach power factor target value. Add capacitor steps or increase value of existing steps to increase total available capacitance. Wrong connection of voltage or current inputs relating to the setting of Connection Mode (10 sec. after connection). Check that connection is according to the set value of Connection Mode Phase to neutral (1ph), phase to phase connection (3ph). Invert C/T inputs (when in four quadrants) Invert voltage inputs Check voltage & currents are measuring the same phase Controller is programmed to prevent or delay switching ON of capacitor steps. Check that : Controller is not in Manual mode. Store default parameters and check again Be sure to wait more than the sum of "Time" delay between Steps "and" Initial Time Delay. Input current exceeds 5.7A (O/L of 15% more than 30sec). Check system current and C/T ratio. Target THD exceeded for a period of more than 10 minutes Indicating an internal fault in the controller. Save again all parameter settings. Press RESET key to cancel fault and repeat self-test. Note: Fault is latched. Press RESET key to cancel fault. Built-in time delay did not elapse. Wait more than 5 sec with UP or DOWN keys pressed. Default param. not stored, disconnect & try again Reset statistics was not successful, disconnect & try again Incorrect storing of new param., disconnect & try again Incorrect E²PROM CHECKSUM Note: Fault 1, 2, 3 and 4 operate with an auto-reset function, after fault disappears, the PFC continues to operate regularly. 15

17 Technical Specification System Supply Voltage: 120, 230, 400V +10% -15%. Other voltages on request Frequency: 50 / 60Hz. Power Consumption: 10VA or 15VA for 6 or 12 step controller Current Measurement: From current transformer 5A Mode of Operation: matic or manual No-Volt Protection: Trips all connected steps on main failure. Voltage Inputs: True RMS with a power consumption Voltage path: 0.2VA Current Inputs: True RMS with a power consumption Current path: 0.5VA Output Relays: 6 steps + 1 Alarm, or 12 steps + 1 Alarm (Alarm relay has Fail-Safe logic) Relay Contacts - Rated load: 8A/250VAC 1800VA. 48Vdc, 0.25A Inductive 48Vdc, 1.0A Resistive Maximum voltage: 250VAC. 125Vdc, 0.15A 125Vdc, 0.4A Accuracy Total Harmonic Distortion (THD): Up to 9th harmonic with accuracy of ±1% ±5% of the reading up to 20% Current :: ± 1.0%, for 0.9 * CT Primary amps setting. Voltage : ± 1.0% of full scale. Power & Active/Reactive Power: For (10% < I110%) of CT primary, accuracy is : ± (2% * CT Primary/ FLC.) of Full Scale Settings Target Power Factor: 0.80 Inductive to 0.95 Capacitive Center Line: For optimal power factor correction Threshold: Prevents over-correction at light loads (Hunting) Time Delay Between Steps: sec. Initial (Add) Time Delay: sec. Wrong Power Factor Alarm: Off, 0.8 Inductive - to 1 Switching Program: (FIFO) Displays Seven-Segment Display Power Factor, Voltage, Current, Active and Reactive Power, Total Harmonic Distortion, Parameter Settings, and Faults. LEDs Communication RS-485: 6 LEDs correspond to Seven-Segment display 6 LEDs indicate Add or Reduce demand, Fault and operating modes 6 / 12 Additional LED's for PFC-10 with 6 / 12 steps RS-485 communication port with Modbus RTU protocl Enclosure Material: Synthetic, flame resistant, IP40 Connections: Plug-in connections IP20 Weight: 0.8 Kg (PFC-10-6) 1.0 Kg (PFC-10-12) Operating Amb. Temp 0 o C to 50 C Cut-out

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