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4. Explanation of Control and Movement
4.9 Light Load Disconnection Operation
■ In order to prevent overloading under light load conditions, the closed capacitors are sequentially cut
off when the load falls below the power value determined from the low load power ratio setting value.
(Please refer to page 32 about the calculation formula of the light load power ratio.)
■ When the active power decreases and the LIGHT LOAD LED lights up and this condition
continues for the Delay Time, one capacitor circuit is cut off. Thereafter, one capacitor circuit is
cut off each time the Delay Time passes as long as the LIGHT LOAD LED lights up.
■ When EXPORT LED lights up, the same operation as the case when LIGHT LOAD LED lights
up is carried out.
■ The order of disconnecting capacitor is as follow:
① In cyclic control, capacitor circuits are turned OFF. This starts from the first capacitor circuit
where the connection signal is outputted. (Disconnection proceeds in the same order as
connection.)
② In priority control, capacitor circuits are turned OFF. This starts from the last capacitor
circuit where the connection signal is outputted. (Disconnection proceeds in the reverse
order of connection.)
③ In optimal control, capacitor circuits are turned OFF in order of the output terminal number.
This starts from the lowest terminal number.
EXPORT
LEAD
LEAD OUT
LAG OUT
LAG
Light Load Disconnection Level
20
Disconnection Level
Active Power
PROPER
Connection Level
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