Title Page
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Client
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Site conducted
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Substation
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Conducted on
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Prepared by
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Location
LV ACB Maintenance Report
- ACB
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Circuit Reference
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Manufacturer
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Type/Model
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Year
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Rating (AMPS)
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Protection Type
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Serial Number
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No. of poles
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Fixed/Withdrawable
Physical Checks
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General visual examinations
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Locks and Labelling
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Housing and Shutters
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Breaker Chassis
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Isolating Contacts
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Operating Mechanism
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Main Contacts - Condition
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Main Contacts - Wear Indication
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Arc Chutes
Auxiliary Checks
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Spring Charge Motor/Mechanism
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Trip Coil (V)
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Close Coil (V)
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Undervoltage Coil (V)
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Auxiliary Wiring & Contacts
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Operations Counter Reading
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Interlocks (Electrical, Mechanical)
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Current Transformers / Sensing Devices
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Protection Module
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ACB Tripped via protection
Insultation Resistance 1000VDC
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Ensure integral protection earth sensing module removed prior to IR Tests
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Breaker Open - All phase configurations >999MΩ
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Breaker Closed - All phase configurations >999MΩ
Integral Protection Module
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Type/Model
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Rating (In)
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Injection Tests
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Photos of test results
Contact Resistance (μΩ)
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Rating:
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L1-1
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L2-1
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L3-1
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N-1
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L1-2
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L2-2
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L3-3
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N2-2
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Comments
Test Equipment used
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Make
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Type/Model
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Serial Number
Sign Off
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Date
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Engineer
