Overview

Introduction

Power Factor Controllers are used for measurement and control of power factor control units for central reactive power compensation. The Power Factor measured by EL is compared with the set point values to provide necessary compensation, Power Factor Controller switches capacitor steps ON and OFF automatically.

EL is a micro-controller relay designed for flush mounting with rear plug-in connectors. In addition, EL displays the system’s Cosθ, in Automatic Operating Mode, EL displays the RMS value of Voltage (V), Current (I), Active Power (W), Reactive Power (kvar), Apparent Power (VA), THD-I, and THD-V of measuring phase.

Front Panel Specification

On the front panel of EL, there are warning LEDs, display and three buttons for settings.

Sl. no.	Buttons and LEDs	Description
1	1-12	The display shows the status of each capacitor step based on the model (for example, EL12 has 12 steps).
2	K (Kilo) LED	When this LED turns ON, multiply the displayed value by 1000.
3	Set Menu	The display shows the Menu options that correspond to the LEDs.
4	Auto/Manual LED	If this LED stays ON, then EL operates in Automatic Mode. If it blinks, then EL operates in Manual Mode. Press the OK button for 3 seconds to enter the Menu and change the operating mode.
5	Cosθ/Auto Setup LED	Press OK button for 3 seconds, when LED is open, automatic setup is done. In Automatic Mode, when this LED is selected by pressing and buttons, systems cosφ is displayed.
6	PF/Cosθ LED	By pressing OK button for 3 seconds; Cosϕ Adjustment can be made by selecting this LED. In Automatic Mode, when this LED is selected by pressing and buttons, systems Power Factor (PF) is displayed.
7	V/Time LED	By pressing OK button for 3 seconds; you enter to Menu, response and reconnection delay time adjustment is made by selecting this LED. In Automatic Mode, when this LED is selected by pressing and buttons phase voltage (V) is displayed.
8	I/Step LED	By pressing Set button for 3 seconds; you enter to Menu and Step Number adjustment is made by selecting this LED. In Automatic Mode, when this LED is selected by pressing and buttons, phase current (I) is displayed.
9	W/Program LED	By pressing Set button for 3 seconds; you enter to Menu and Power Sequence adjustment is made by selecting this LED. In Automatic Mode when this LED is selected by pressing and buttons, systems Active Power (W) is displayed.
10	VAr/Transformer LED	By pressing OK button for 3 seconds; you enter to Menu and Operating Voltage, Phase Angle, and Current transformer ratio adjustment is made by selecting this LED. In Automatic Mode when this LED is selected by pressing and buttons, systems Reactive Power (VAr) is displayed.
11	Alarm/VA LED	By pressing OK button for 3 seconds; you enter to Menu and Over Voltage, and THD Protection adjustment is made by selecting this LED. In Automatic Mode when this LED is selected by pressing and buttons, systems Apparent Power (VA) is displayed.
12	THD LED	In Automatic Mode when this LED is selected by pressing and buttons, THD values are displayed by pressing OK button.
13	M (Mega) LED	When this LED is ON displayed value must be multiplied by 10⁶.
14	OK button	Enter button for different settings.
15	(UP) Button	To move up in the Menu and to increase the numerical value inside the setting.
16	(DOWN) Button	To move down in the Menu and to decrease the numerical value inside the setting.
17	Automatic Setup	Automatic Setup is started by pressing and buttons together at the same time.
18	C+ LED	This LED turn ON when EL switches capacitor steps on.
19	Normal LED	This LED turn ON when the targeted compensation is achieved.
20	C- LED	This LED turn ON when EL switches capacitor steps off.
21	THD LED	This warning LED turn ON voltage harmonic ratios exceed adjusted set values.
22	Insufficient Compensation LED	This alarm LED turn ON when low power factor occurs.
23	Over Compensation LED	This alarm LED turn ON when over compensation occurs.
24	Over Voltage LED	This alarm LED turn ON when over voltage occurs.