Circutor FRE Series Manual de usuario descargar pdf (Pagina 17)

FRE / FRES

17 / 20

- Check that the steps connect and disconnect properly

- Check that there is no consumption in any phase with the step disconnected. If there is

consumption this means that some of the thyristors are defective.

- Check the consumption of the different steps, in each phase. The normal values are shown in

Table7-4

Table 7-4.- Nominal consumption of the LC steps of an FRE or FRES filter

POWER

CURRENT

230V

400V

2.5 kvar

6.28 A

3.6 A

5 kvar

12.56 A

7.2 A

7.5 kvar

18.85 A

10.8 A

10 kvar

25.12 A

14.4 A

12.5 kvar

31.41 A

18 A

15 kvar

37.7 A

21.6 A

20 kvar

50.24 A

28.8 A

25 kvar

62.82 A

36 A

30 kvar

75.4 A

43.2 A

40 kvar

100.48 A

57.6 A

50 kvar

125.64 A

72 A

60 kvar

150.8 A

86.4 A

70 kvar

175.92 A

101.1 A

80 kvar

200.96 A

115 A

- Check the voltage on all of the reactor's windings (input - output of the same winding, not

between phases). The voltage depends on the filter's p% factor (see label on the equipment), in

accordance with the following formula:

%)p100(

%p.577,0

)phasephase(MAINSL

−

For example, in the case of the 400V grid and p%=7, V

=17.38V. For the 400V grid and p%=14,

=37.57V. For other line voltages, the V

value is proportional to the line voltage.

NOTES:

• When the consumption of the steps is 25% less than that stated in Table7-4 and the voltage is within

the tolerance limits, this is a sign of degradation in the capacitors. These must be replaced with a

suitable spare part if these symptoms are detected in a step.

• When the consumption of the steps is 10% more than the values stated in Table7-4, this can be

caused by the presence of resonances. If this is detected, measure the grid's voltage THD (it must be

under 5%) or check the filter's tuning frequency.

• If the voltage drop in a reactor deviates from the values stated in this section, check the reactor. This

phenomenon can be caused by the presence of a resonance.

7.3.3 PF regulator checkings.

Refer to the manual of the specific regulator used in the capacitor bank. This

manual is always supplied with the capacitor bank.

• Make sure that there are no damaged segments on the display (abnormal brightness).

• Make sure that regulator's keyboard is working properly:

- Enter Setup and check the adjusted values

- Force the manual connection and disconnection of a step.

7.4 Environmental Conditions:

• Check that the maximum environmental conditions listed in section 4.3 are observed

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Circutor FRE Series Manual de usuario Pagina 17

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