How does a drawout Masterpact NW breaker report its position in the cradle? (Connected, Test, or Disconnected)


08 June 2022

How is the cradle position indicated for NW breakers?

Product Line:
Circuit Breakers

Cradle position is monitored mechanically and specific blocks on the top rail can be fitted with actuator mechanisms to indicate the 3 different states.
The cradle comes standard with 3 actuators each of the following (blocks not standard):
Cradle position example
CD - indicates the disconnected position. This position is indicated when the required clearance for isolation of the power and auxiliary circuits is reached.
CE - indicates the connected position.
CT - indicates the test position. In this position, the power circuits are disconnected and the auxiliary circuits are connected.
Specific contact blocks must be used in these positions, S33170 (push in type) or S48929 (ring terminal type).
Instructions for adding/replacing here .

These are the possible combinations available to provide cradle position status;
Cradle switch table
Replacement part number of the actuators included with the cradle is S48560.
Instructions here.