CIRCUTOR OPTIM Series - Manual (Page 15)

OPTIM SERIES
15
7 MAINTENANCE
7.1 Safety regulation
SAFETY
Apply the safety regulations listed in section 2 of this manual before operating the
equipment.
The standards and applicable laws of the country where the capacitor bank is
installed or operated should be strictly followed.
7.2 Maintenance with the bank disconnected
7.2.1 Basic maintenance protocol
Monthly
• Perform a visual inspection of the capacitors
• Check the protection fuses
• Control the environmental temperature (average of 30 ºC. In accordance with IEC 60831).
• Control the service voltage (especially during moments of low charge, it must not exceed the
nominal +10%).
Six-monthly
• Maintain the capacitor terminals clean.
• Verify the state of the contacts of operating elements.
• Check that the capacitor current is not lower than 25% or greater than 120% of the nominal
value by phase and that there is no phase unbalance greater than 15%.
Annually
• Carry out a dielectric rigidity test by applying 2.5 kV for 1 s between the capacitor's terminals
and earth.
• Check the capacity of the different steps. One indirect check may be to check that the
consumption is manual.
• Check the tightness of all terminal connections.
• Inspection of the fuses.
- Power circuit: NH fuses. Check continuity and temperature.
- Control Circuit: Neozed fuses. Check continuity and temperature
7.2.2 Tightening the electrical connections.
• The connections must be tight. The following tightening torques for the fuse bases and
contactors are listed in tables 7-1 and 7-2
Table 7-1.- Tightening torques of the cables to the fuse bases
FUSE BASE TORQUE (Nm)
NEOZED 63 A 3.6
NH-00 15.2