ABB HPA 12kV - Table of Contents

Contents
1.1 Data 03
1.2 Construction & Function 03
1.2.1 Breaker Poles 03
1.2.2 Operating mechanism 06
1.3 Maintenance 10
1.3.1 Maintenance schedule 10
1.3.2 Checking and refilling of SF gas 14
6
1.3.3 Control of gas pressure 15
(Only for poles without pressure gauge)
1.3.4 Checking for operating speed and time 16
1.4 Service instruction 17
1.4.1 Fault finding chart 18
1.4.2 Replacement of operating coils 19
1.4.3 Replacement of micro switch 20
1.4.4 Replacement of auxiliary contacts 21
1.4.5 Replacement of motor 21
1.4.6 Replacement of damping device 21
1.4.7 Replacement of operating mechanism 22
1.4.8 Changing of breaker pole 24
1.4.9 HPA - operating gear adjustments 24
1.5 Accessories Spare parts and additional equipment 25
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