ABB OVB-SDB, Инструкция по эксплуатации

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1.3.1 Electrical Spring Charging (Ref Fig E)
Spring charging unit consists of Arm (1), Charging gear (2), Closing Spring (3), latches (4),
reduction gear with Spring charging Motor and Cam (5). Closing - Spring assembly &
charging gear are mounted on power shaft. When the Motor rotates, the reduction gear
connected to that gives 1/144 reduction. Reduction gear assembly is connected axially with
the Cam that rotates the spring-charging arm.
The arm rotates the charging gear, at the same time; the latches hold the charging gear and
arm returns to its position. Closing spring gets stretched and this continues till the spring
gets fully charged. The backward rotation of the charging gear (2) is prevented by latches
(4). A plastic cam activates Motor-cut-off switch & Spring Charged indication will appear
after full charging. Closing lever (6) stops the shaft from further rotation. Motor cutoff switch
disconnect the supply of the motor.
Fig F shows initial stage of closing spring and associated lever (L1).
FigG shows the condition after closing spring gets fully charged. During this
process latch L1 rotates of about 180°.
Fig E
1.3 Operating mechanism - Working principle
There are two options for charging the springs
1. By electric motor.
2. Manual operation