Embedded Poles
Embedded poles combine vacuum interruption components with external insulation for circuit breaker assembly. Selection brings together the interrupter, conductor connections and mechanical drive. A pole is part of an assembled breaker, so its configuration must match the intended switching duties and operating mechanism.
Start with the interrupter and drive
Similar pole outlines can contain different internal configurations. Identify the interrupter and mechanism output before checking travel, overtravel, contact force and mounting datums. Replacement selection must account for the complete operating interface, not just the visible shape.
- Interrupter reference and pole assembly drawing
- Drive connection, travel and direction
- Fixing holes and mounting datums
Match conductor construction to current requirements
Terminal orientation, connection faces and external busbars affect the assembly. Each current configuration needs an identified conductor and connection arrangement. Insulation, partial-discharge and temperature-rise information should apply to that version and its installation conditions.
- Upper and lower terminal interfaces
- Phase arrangement and insulation space
- Test and inspection records for the configuration
Separate pole supply from breaker supply
List pole assemblies, connection pieces, fasteners and operating mechanisms separately. A complete-breaker enquiry also requires secondary controls and defined interruption duties. Documentation for a pole alone does not establish the performance of the complete breaker assembly.
- Specify single-pole components or assembled pole sets
- Identify mechanisms and external busbars included
- Provide original-component and interface drawings for replacement
Can numbers in a pole designation be used as dimensions?
Not by themselves. Use the dimensioned drawing for the relevant version to establish height, fixing centres and terminal locations.
Does an embedded pole include the breaker mechanism?
Specify the pole and mechanism separately in the supply schedule and check their travel and output requirements together.
Related selection resources
Discuss a pole assembly
Provide the interrupter reference, pole and mechanism interface drawings, current and interruption requirements, required connection parts and quantities.
Send project requirements
