Current standards for capacitors are defined so that capacitors can withstand a permanent overcurrent of 30%. These standards also permit a maximum tolerance of 10% on the nominal capacitance. Cables must therefore the sized at least for: Icable = 1.3 × 1.1 (Inominal capacitor) i.e. Icable = 1.43 × Inominal
Go back to capacitors installation options ↑ Current standards for capacitors are defined so that capacitors can withstand a permanent overcurrent of 30%. These standards also permit a maximum tolerance of 10% on the nominal capacitance. Cables must therefore the sized at least for: Icable = 1.3 × 1.1 (Inominal capacitor)
Capacitor bank is usually controlled by the microprocessor based device called power factor regulator. Beside, segment installation practice demands protection for capacitor banks. In this case, capacitor banks are connected to the busbars, which supply a group of loads. What’s good in this solution // No billing of reactive energy.
This type of compensation method demands capacitor banks to have wide range of power regulation, which can be determined by 24h measurements at the place of installation of the circuit breaker. What’s good in this solution // But, the downsides are : The losses in the cables (RI 2) are not reduced.
Segment (or group) installation Segment installation of capacitors assumes compensation of a loads segment supplied by the same switchgear. Capacitor bank is usually controlled by the microprocessor based device called power factor regulator. Beside, segment installation practice demands protection for capacitor banks.
For a safe use of CLMD capacitor units, please ensure − Installation and maintenance are undertaken only by authorized and qualified personnel, in ac-cordance with current local regulations; − Isolate the equipment from the supply before at-tempting to gain access.