CIRCUTOR OPTIM-EMS-C Series - Manual (Page 22)

5.2.6. CLEANING THE CABINET
 Remove any solid particles.
 Clean the inside of the cabinet.
 Clean ventilation grilles.
5.3.- MAINTENANCE WITH THE CAPACITOR BANK CONNECTED
 Check that the main switch turns on and off without having to force the mechanism.
 If there is an individual earth leakage protection for the capacitor bank, check its proper
operation by pressing the test button.

Force the connection and disconnection of the capacitors in manual mode. (see the regula-
tor manual or quick guide before carrying out this operation) and perform the following checks:
▪ 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 and are short-circuited.
▪ Check the consumption of the different steps in each phase. The normal values are
shown in Table 5 , in accordance with the power of each step.
Table 5:Nominal consumption of the capacitor paths, by power.
Power at 3 x 400 V In
2.5 kvar 3.6 A
5 kvar 7.2 A
7.5 kvar 10.8A
10 kvar 14.4 A
12.5 kvar 18 A
15 kvar 21.6 A
20 kvar 28.8 A
25 kvar 36 A
Note: When the consumption of the steps is 25% less than that stated in Table 5 and the volt-
age is within the tolerance limits, this is usually a sign of degradation of the capacitors. They
must be replaced with a suitable spare part if this is detected in a step.
Note: When the consumption of the steps is 10% more than the values stated in Table 5 , this
may be caused by the presence of resonances. If this is detected, measure the THD of the
mains voltage (it should be below 5%).
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OPTIM EMS-C series
Instruction Manual