CIRCUTOR FRE Series - Manual (Page 16)

FRE / FRES
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• In dirty environments (dust, sawdust, metal trimmings, etc.). Vacuum the dust and solid remains
regularly. There is no estimated time frame for cleaning, it depends on the amount of dirt that
penetrates the capacitor bank cabinet.
Table 7-2.- Tightening torques of the cables to reactor terminals .
Reactor Connection Terminal (Nm)
RE-5-400 Terminal 1.83
RE-10-400 Terminal 1.83
RE-15-400 Terminal 1.83
RE-20-400 Terminal 6.2
RE-25-400 Terminal 6.2
RE-30-400 Terminal 15.2
RE-40-400 Terminal 15.2
RBE-50-400 Flat strip 30
RBE-60-400 Flat strip 30
RBE-80-400 Flat strip 30
7.2.4 Key points for inspecting capacitors.
• Inspect the cables and terminals. They should not be overheated or blackened.
• The terminals must be clean
• The slow discharge resistors must be in good condition (they should not be open or show signs of
burns)
• Check the tightness of capacitor terminals, as shown in Table 7-3
Table 7-3 .- Tightening torques of the cables on the capacitor bank terminals
Capacitor Power terminal
(Nm)
Earth terminal
(Nm)
CFB, CSB 21 6.2
Tubular
7.2.5 Key points for testing the PF regulator
• Check that the regulator does not show signs of deterioration and the display is lit as normal.
• Inspect the cables and terminals. They must be clean, not hardened or overheated.
• Check the connections and the insertion of removable terminal strips, if used:
- The terminal strips must be well fastened on removable regulators.
- Check that the terminals are tightened properly. The recommended torque is 0.6 Nm.
7.2.6 Cleaning the cabinet
• Remove possible metallic and other debris.
• Clean the inside of the cabinet
• Clean ventilation grills
7.3 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
• Check that the auxiliary control voltage is within the tolerance limits. If the capacitor bank has an
autotransformer, check that it is in good condition and does not show signs of deterioration
• Force the connection and disconnection of the different steps in manual mode. (refer to the regulator
manual before carrying out this operation) and perform the following tests: