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General| Brand | Siemens |
|---|---|
| Model | 5-GMI-250 |
| Category | Circuit breakers |
| Language | English |
Definition and qualifications of a "Qualified Person" for this manual.
Key safety procedures to follow, including de-energizing and spring discharge.
Describes hazards of high voltages and mechanical parts in circuit breakers.
Emphasizes reading manuals, safety instructions, and using qualified personnel.
Hazards associated with the breaker's heavy weight, requiring qualified personnel.
Verifying discharged springs and open contacts without control power.
Performing a check to ensure closing and tripping springs are fully discharged.
Warning about potential X-ray emission from circuit breakers during testing.
Explains the mechanism's springs, solenoids, and trip-free operation.
Describes the breaker's ability to trip during closing operations.
Details the mechanical and electrical trip-free functionality.
Explains devices providing trip-free interlock between Test and Connected positions.
Outlines tasks for periodic maintenance and lubrication as per Table 1.
Performing manual charging and checking contact erosion marks.
Using high voltage equipment to test vacuum integrity and insulation.
Performing a high potential test to verify vacuum integrity of the breaker.
Verifying insulation system integrity and establishing a baseline for future comparison.
Emphasizes hazards of high voltage and mechanical parts during maintenance.
Emphasizes severe personal injury and death risk from high voltage tests.
Warning about X-ray emission from vacuum interrupters during high voltage tests.
Procedures for removing and replacing vacuum interrupters, noting care for bellows.
Steps for inserting new vacuum tubes, noting orientation and clamp securing.
Emphasizes hazards of high voltages and mechanical parts during overhaul.
Tasks for performing high potential tests on primary and control circuits.
Symptoms and possible causes/remedies for failure to close.
Symptoms and causes when springs charge but no closing occurs.
Symptoms and causes when coil activates, but no contact closure.
Symptoms and possible causes/remedies for unintended closing signals.
Symptoms and possible causes/remedies for failure to trip.
Symptoms and possible causes/remedies for unintended tripping.
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