Manual Controlador Factor Potencia 320

8/12/2019 Manual Controlador Factor Potencia 320

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CLTElnet

Power Factor Controller


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Elnet LTC - Power Factor Controller -2-

Table of Contents

CHAPTER 1 Electrical Wiring...................................... 3

1.1 Electrical Wiring................................................3

1.2 Electrical Connections.......................................4

CHAPTER 2 Power Factor Controller..........................8

2.1 Data Screen.........................................................9

2.2 Vital Settings......................................................10

2.3 Non Vital Settings..............................................132.4 Working Range..................................................14


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CHAPTER 1 Electrical Wiring

1.1 Electrical Wiring

Notice!The distance between the external current

transformer and the Elnet will not exceed 5m

Attention! Maximum current for relays R1 R6 is up to 150ma MAX

Figure 1.1 Electrical wiring diagram


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1.2 Electrical connections

All Connections, except those to the CT core of the ElNet LTC Energy & Power Factor Controller are madevia terminal connector plugs (Voltage input, PowerSupply, Communication etc.).Recommended max tightening torque for the connector

screws is 0.5 Nm.The CT cores of the ElNet LTC Energy & Power FactorController are located externally on the rear of theinstrument and the lead from the leg of the externalCurrent Transformer must pass through in the correctdirection.

NOTE!

Ensure all the connections to the leads of the currenttransformer wiring are secure and there is no mechanicalstrain on the wire. The cross section of the leads to theCurrent transformer must be compatible with the power ofthe current transformer. We recommend a power transformerwith at least 3VA and the length of the wiring of thetransformer should not exceed 3m.


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Insert the lead from side L of the Current Transformersof Line 1 through the bottom of the CT core I1A, (top leftlooking from back), of the ElNet LTC Energy & PowerFactor Controller.

Ensure the leads from leg L of the CurrentTransformer on Line 1 pass through the bottom of

CT core I1A.

Ensure the other end of the lead emerging from thetop of CT core I1A is connected to leg K of theexternal Current Transformer on Line 1.

WARNING!

WARNING

Never allow an open circuit between the two CurrentTransformers.

Repeat the procedure for Line 2 and Line 3.

Connect the rest of the connections to the ElNet LTCEnergy & Power Factor Controller by means of terminalconnector plugs.All Rear Panel connections are according to the wiring

diagram (See Figure 1.1) and are easy to follow.


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Figure 1.2 Back of the device


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Pin Designation Description Remarks

V1 Line 1 - Voltage Supply Use 6Amp fuse to protect the lineV2 Line 2 - Voltage Supply Use 6Amp fuse to

protect the line

V3 Line 3 - Voltage Supply Use 6Amp fuse to protect the line

I1A From external Current

Transformer on Line1

Note the correct

direction to insertthe lead

I2A From external CurrentTransformer on Line2

Note the correctdirection to insertthe lead

I3A From external CurrentTransformer on Line3

Note the correctdirection to insertthe lead

Power 80 - 280 VAC OR 110-300 VDC

N Neutral Bridged from theneutral Line

R1 - R6 Control relay outputs up to 150mA max

C Common connector for thecontrol relays outputs

RS-485 - ( - )RS-485 - ( + ) Communications

Figure 1.3 Connections on the back of the device


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CHAPTER 2 Power Factor Controller

ElNet LTC Energy & Power Factor Controller enablesmeasurement of power factor and power factor correction

by using ON/OFF switching control of capacitors.

Elnet LTC enables automatic identification of capacitors'size and its connection in various methods.

1. In the Main Menu select "power, power factor" and press Enter.

2. Select "PF Controller". The following screen willappear:

Figure 2.1 PF Screen


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2.1 Data ScreenSelection of "Data Screen" displays monthly and weeklyaverage power factor and also real time power factor. Inaddition, at the bottom line you can see which capacitorsare connected and which ones are disconnected.

In case of fault one of the following messages willappear: "Low Current", "High THD", "Volt RangeError", "Capacity Load", and "Need More Capacitors".

Figure 2.2 Data Screen


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2.2 Vital Settings

Figure 2.3 Vital Settings

Setting power factorPressing Enter at the line indicating "power factor"enables setting the requested power factor. Whenselecting this option a screen will appear displaying the

power factor, a changeable number. By the means ofarrow buttons select the desirable digit and by +/- buttonschange the value of the number.Changing the connection order (capacitors)

Each time you press Enter at the line indicating"connection order" the connection order options will bechanged from the following possibilities: random, first,cycle.


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The capacitors chosen for power factor correction arechosen according to their size, meaning that it is chosenthe minimal number of the capacitors for achieving therequested value of the power factor.

There are a number of methods as following:

Random - this method enables random selection ofequally-sized capacitors. In this method after a certain

period the number of working hours of all equally-sizedcapacitors will be equal.

First - this method enables fixed selection, meaning acertain capacitor will always be first and the other willalways be second and so on this method isrecommended in places preferring unequal workinghours of the capacitors.

Cycle - whenever there are a few capacitors of equal sizethere is a possibility to use the "cycle" method so that thenumber of working hours will be equally divided

between these capacitors.

Capacitors' value setting:

Press Enter at the line indicating "capacitors value".

Capacitors 1 6 will be displayed; pressing Enter on therequested capacitor will show a screen enabling thesetting of capacitor's size.


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Capacitors' value measure:

Figure 2.4 Value measure of the capacitors

The Multimeter enables true capacitors value measure forcapacitors 1 6. At the column "Measure" indicated themeasured value and at the column "Value" indicated thecapacitor's value as defined by the user.

The "Rnd" button enables correction of the measuredvalues to the closest rounded value under the condition

that the difference between the capacitors doesn't exceed10%.

The "Save" button enables saving the measured (and/orrounded) values instead of the values entered by the userat the previous screen "capacitors value".


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2.3 Non-vital settings

Figure 2.5 Non vital settings

At the above screen there are a few non-vital settings thatmay be changed by the user detailed as following:

"Delay On": enables setting the delay between thedecision of connecting the capacitor and its actualconnection. This delay is meant to minimize the numberof connections/disconnections of the capacitors duringcontrol of the desired power factor value."Delay Off": enables setting the delay between thedecision of disconnecting the capacitor and its actualdisconnection. This delay is meant to minimize thenumber of connections/disconnections of the capacitorsduring control of the desired power factor value.


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"Control Range": enables the user to define theworking range of the capacitors in performing powerfactor correction. When the "control range" = 0.01 thesystem is looking for the minimal capacitors number for

performing power factor correction from the desiredvalue (for example, 0.92) to the value 0.93 = 0.92+0.01

(control range). From this point, the system is looking forthe minimal capacitors' combination required forreaching power factor of 0.93 and is disconnectingcapacitors accordingly.

The setting is made by selecting the digit with andchanging the value by (+), (-).

2.4 Working range settings

Figure 2.6 Working range settings


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Elnet LTC - Power Factor Controller 15

Working range settings enable defining ranges forcurrent, voltage, THD V and THD I values detailed asfollowing:

"Max. THD I" setting enables disconnection of all thecapacitors whenever the actual THD I value exceeds thevalue which was defined by the user. If THD I = 0 this

option is unavailable."Max. THD V" setting enables disconnection of all thecapacitors whenever the actual THD V value exceeds thevalue which was defined by the user. If THD V = 0 thisoption is unavailable.

"Min. current" setting enables defining value for minimal

current under which power factor correction is notrequired.

"Volt. Change" setting enables defining low/high voltagerange above which the Elnet LTC disconnects all thecapacitors.

The setting is made by selecting the digit with andchanging the value by (+), (-).

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Manual Controlador Factor Potencia 320

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