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General| Brand | GE |
|---|---|
| Model | AK-50 |
| Category | Circuit breakers |
| Language | English |
Details on how to operate the circuit breakers.
Instructions for manually closing the breaker.
Procedure for manually closing the breaker for maintenance.
How the breaker is tripped electrically using various devices.
Procedure for inserting the safety pin for safe maintenance.
Guidelines for periodic inspection of the breaker.
Recommended lubrication points and procedures.
Steps to separate breaker frames for repair or replacement.
Causes and remedies for overheating issues.
Causes and remedies for breaker failing to trip.
Causes and remedies for unexpected breaker tripping.
Inspection and replacement of arc quencher components.
Procedure for replacing arc quenchers in AK breakers.
Procedure for replacing arc quenchers in AKF breakers.
Steps to disassemble the center pole of AK/AKF breakers.
Description of the pole unit assembly and its parts.
Method to measure contact wipe on breaker contacts.
Method to measure contact pressure on breaker contacts.
Procedures for adjusting contact wipe and pressure.
Ensuring correct contact sequence for proper operation.
Procedure for replacing stationary arcing contacts.
Procedure for replacing movable arcing contacts.
Replacing stationary, intermediate, and main contacts.
Replacing movable intermediate and main contacts.
Operation of electrical and manual AK mechanisms.
How the closing springs are charged.
Procedures for electrically closing the breaker.
How various trip devices operate the breaker.
Adjustments for the operating mechanism.
Instructions for replacing the operating mechanism.
Steps for closing the breaker using the manual mechanism.
Procedure to insert the safety pin for slow closing.
General procedure for replacing mechanism parts.
Checking and making adjustments after reassembly.
Description of the AKF breaker mechanism.
Measurements and adjustments for AKF breaker contacts.
Procedure to adjust center-pole contact wipe and overlap.
Procedure to adjust the center-pole open contact gap.
Procedure for replacing stationary contacts.
Procedure for replacing movable contacts.
Function and replacement of the auxiliary switch.
Description of the auxiliary switch in AK breakers.
Steps for replacing the auxiliary switch.
How to adjust the auxiliary switch contacts.
Differences in auxiliary switch mounting for AKF breakers.
Replacement procedure for AKF auxiliary switches.
Adjustment procedure for AKF auxiliary switches.
Overview of electrical closing mechanisms and controls.
Function and replacement of the closing switch.
Function and replacement of motor cut-off switches.
Function and replacement of the control relay.
Details on the time-delay undervoltage tripping device.
Adjustments for the time-delay undervoltage device.
Steps for replacing the undervoltage tripping device.
Replacing the coil of the tripping device.
Details on the instantaneous undervoltage tripping device.
Operation of the long time-delay tripping function.
Operation of the instantaneous tripping function.
Steps for replacing the EC-1 tripping device.
Adjustments for the EC-1 tripping device.
Description of the EC-1 series overcurrent tripping device.
Operation of the short time-delay tripping function.
Operation of the long time-delay tripping function.
Operation of instantaneous tripping functions.
Adjustments for the EC-1 tripping device.
Operation of short time-delay tripping for EC-1A/EC-1B.
Operation of long time-delay and high-set instantaneous tripping.
Operation of low-set instantaneous tripping.
Operation of high-set instantaneous tripping.
Procedure for replacing the EC-2 device.
Description of the reverse current tripping device.
Adjustments for the reverse current tripping device.
Principles and benefits of selective tripping.
Description and replacement of primary disconnects.
Function and replacement of secondary disconnects.
Steps for replacing secondary disconnects.
Function and adjustment of the drawout mechanism.
Description and replacement of the shunt-tripping device.
Adjustments for the shunt-tripping device.
Procedure for replacing the shunt-trip device coil.
Function and adjustment of the bell alarm and lockout device.
Operation of the bell alarm/lockout device for AK-1 series.
Adjustments for the bell alarm/lockout device.
Operation of the bell alarm/lockout device for AK-2 series.
Adjustments for the AK-2 bell alarm/lockout device.
Operation and function of the dynamic brake mechanism.
Adjustments for the dynamic brake control switches.
Recommended tools for maintenance.
Miscellaneous tools and items required for maintenance.
Information on ordering and using renewal parts.
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