frako PQC - Automatic Connection and Stage Identification

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Installation | 31

FRAKO | Operating Manual | Power Quality Controller – PQC

Identification Automatic / manual connection and stage identiﬁcation (see

Section 5.3.3 “Automatic connection and stage identification”

and Section 5.3.4 “Manual connection and stage identifica-

tion”)

Note

For the voltage and current readings (and the values of power derived from

them) to be displayed correctly, it is essential that the voltage and current

transformer ratios be entered.

Regardless of the initial start-up mode, all the conﬁguration data are saved in a

non-volatile memory. In the event of power loss (intended or not) these data are not

lost. When the power supply returns, the PQC starts up automatically and begins the

control process after booting up.

Note

Automatic connection and capacitor stage identiﬁcation is only possible

with single-phase measurement.

5.3.3 Automatic connection and stage identication

To start the automatic connection and capacitor stage identiﬁcation procedure, select

Auto in the Detection menu and conﬁrm this with Continue.

The PQC switches the individual output relays one after the other and identiﬁes not

only the phase angle of the current and voltage measurement paths but also to which

output each capacitor stage is assigned. Each output is switched several times until

the PQC can verify the measured values.

This is shown in the following screenshots:

Stage capacitive power identiﬁcation is being carried out;

connection identiﬁcation is complete, with the result con-

nection type 4.

When the PQC has successfully completed the con-

nection and stage identiﬁcation procedure, the oper-

ator must conﬁrm the result with the key. The PQC

then switches to operating mode and displays the PQC

overview screen. If at this moment there is a concrete

need for reactive power control, the PQC commences to switch stages in or out as

necessary.

If the PQC was not able to complete the connection and stage identiﬁcation proce-

dure successfully, or if the user presses the ESC key to cancel it, this is indicated by a

message on the screen. The initial start-up procedure can then be restarted.