CIRCUTOR OPTIM Series - Manual (Page 17)

OPTIM SERIES
17
Table 7-3.- Tightening torques of the cables on the capacitor bank terminals
Capacitor Power terminal
(Nm)
Earth terminal
(Nm)
CSB 21 6.2
CLZ CAPACITORS
Diameter (mm) Power terminal
(Nm)
Earth terminal
(Nm)
2.5 0.33 0.463
3 0.57 0.8
4 1.3 1.83
5 2.59 3.62
6 4.49 6.2
8 10.9 15.2
10 21 30
12 37 50
7.2.5 Key points for inspecting the regulator
• Check that the regulator does not show signs of deterioration and the display is lit as normal.
• Inspect the cables and terminals. They should be clean and should not be hardened or
overheated.
• Inspect the connections and the insertion of removable terminal strips:
- The terminal strips must be well fastened on removable regulators.
- Check that the terminals are tightened properly. The recommended torque is 0.6 Nm.
7.2.8 Cleaning the cabinet.
• Remove possible metallic and non-metallic particles.
• Clean the inside of the cabinet
• Clean ventilation grilles
7.3 Maintenance with the battery connected.
• Check that the mains switch connects and disconnects, without having to force the mechanism
• If there is an individual earth leakage protection for the bank, check its proper operation by
pressing the test button.
• Check that the auxiliary control voltage is within the tolerance limits. If the bank has an
autotransformer, check it is in good condition and does not show signs of deterioration.
• Force the connection and disconnection of the capacitors in manual mode.(refer to the
regulator manual before carrying out this action) and perform the following checks:
- Check that the contactors connect and disconnect properly.
- Check that the contactor, once connected, does not rattle or vibrate.
- Check the capacitor consumption in each of the phases. The normal values are provided
in table 7-4