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General| Rated Voltage (Ur) | 230/400 V AC |
|---|---|
| Breaking Capacity (Icn) | 6 kA |
| Standards | IEC/EN 60898-1 |
| Terminal Capacity | 25 mm² |
| Poles | 1P, 2P, 3P, 4P |
| Tripping Characteristic | C |
| Mechanical Life | 20, 000 cycles |
| Electrical Life | 10, 000 operations |
Preliminary inspections before installing circuit breaker into switchboard.
Inspect arc chutes, contacts, and electrical connections before installation.
Procedure for removing the interphase barrier from the circuit breaker.
Detailed steps for removing arc chutes from the circuit breaker.
Examine arc chutes for breakage, foreign particles, and deformation.
Check insulated parts for damage and remove dirt or soot.
Procedure to check contact pressure using manual slow-close.
Steps for installing arc chutes into the circuit breaker.
Procedure for installing the interphase barrier.
Steps for racking the circuit breaker into its compartment.
Procedure for removing the breaker from the connected position.
Procedure for removing the breaker from the disconnect position.
Steps to withdraw the circuit breaker from the switchboard.
Recommendations for safe operation and maintenance procedures.
Overview of maintenance requirements and inspection intervals.
Procedure for checking and adjusting main contact pressure.
Cleaning procedures for contacts and insulation surfaces.
Procedure for testing millivolt drop to determine breaker condition.
Checking the performance of the puffers for proper operation.
Procedure for adjusting bridge pivot pressure when indicated by millivolt drop.
Checking and verifying closing and opening times.
Inspection of arc chutes for damage, crust formation, and wear.
Adjusting the operating mechanism latch check switch.
Adjusting the gap between control device lever and limit switch crank.
Adjusting the racking mechanism for proper interlocking.
Information on lubricants and lubrication procedures for the breaker.
Test values for dielectric tests to be applied for one minute.
Chart listing typical problems, causes, and corrective actions.
Operating voltage ranges and average current values for control devices.
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