Model Type: A50-40-00 Electrical 1SBL351201R3000 A50-40-00 Auxiliary Contactor
Below is a side internal view of the EL mechanism and the associated anti-pumping component.
When the opening pushbutton or coils are activated the opening shaft lever pushes down on point C of the anti-pump device.
This causes the device to side down slot D in direction of arrow B.
Then the trigger portion A moves out from between the closing push-button and the closing shaft lever.
So if the closing button or signal is held active and the opening button or signal is then activated.
The trigger A will pull out from between closing shaft lever and the closing push button.
Once the open signal is released the trigger A will come to rest under the closing push-button and will
not return between the closing shaft lever and closing push-button until the button or closing command is released.
The closing push button is operated by the closing coil (MC) directly by the shaft closing device.
This allows the anti-pumping device to prohibit closing by manual or electrical means.
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