Manual-overview of system
Measurements in security circuit
The security circuit is monitored via a residual current circuit breaker and a 2A or 4a fuse.
The measurement of the loop resistance through the RCI is not possible or doesn't make sense. Because of
the leak current of 30mA is the loop resistance is this benign. It is crucial that the RCI disconnect above
30mA if the test is made from any point against ground.,
This could be made with a test device or an adapted DUSPOL
Due to the desigh of the elevator the security circuit is not easy to acced. Thats way important
measurepoints are brought to the service panel via X88 .
On sheet 3 on circuit diagramm you find important advices.
Triangle monitoring „DKU“
Backround
This device has to perform following task. As soon as somebody wants to enter the cabin and opens the
shaft door with the triangle key the elevator has to stop.
So it is prevented that somebody is hurt, if he entered the shaft without stopping the elevator by the
emergency stop.If he had entered and the door is closing behind him giving free the elevator.
When there is a short fosse or short head the DKU is a temporarily tool to errect the fold support or brakets.
Furthermore by using the DKU the housing of counterweight is not neccessary and it is taken in account
the inspection control conform the EN81-20
Functional principle
Generally the DKU consists of a relay circuit in lock (maintained command) via the monitor switches of
the triangle lock-release.
The monitor switches ares in a normal open configuration.and arranged in a serial circuit.. so as soon as
one triangle is opened the relais depress and the circuit is open.
For a short fosse, missing hausing of counterweight or missing Inspection control one contact in the shaft
door is enough. When head of shaft is shortened, every shaft door has to have a contact!
The power supply of DKU has to be battery backed- this to prevent a triggering when power failure.
Functional check
The elevator is in normal mode and ready .
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