IV
7.1 Low Voltage and High Voltage Electrical Connections .....................................16
7.2 Connections.................................................................................................16
7.3 Ground Connections.....................................................................................16
7.4 Pre-Commissioning Check ............................................................................16
7.5 Recommended Torque..................................................................................17
8 Components and Accessories .....................................................................20
8.1 General .......................................................................................................20
8.2 Cover Mounted Pressure Relief .....................................................................21
8.3 Expulsion fuse..............................................................................................21
8.3.1 Bay-O-Net type ...................................................................................21
8.3.2 Remove Fuse Holder...........................................................................22
8.3.3 Replace Fuse Link ..............................................................................24
8.3.4 Terminal board type.............................................................................30
8.4 HV Bushing..................................................................................................30
8.5 Earthing Plate ..............................................................................................31
8.6 LV Bushing...................................................................................................31
8.7 Off-Load Tap Changer ..................................................................................32
8.8 Oil Level Indicator.........................................................................................33
8.9 Schrader valve .............................................................................................34
8.10 Transformer Pressure Gauge ......................................................................35
8.11 Overpressure Relief Valve ...........................................................................36
8.12 Oil Filling Valve ...........................................................................................36
8.13 Oil Temperature Gauge ...............................................................................37
8.14 Load Switch ...............................................................................................38
8.14.1 Two Position Load Switch ..................................................................38
8.14.2 Four Position Load Switch..................................................................39
8.15 Oil Draining Valve .......................................................................................40
9 Transformer Maintenance Guide .................................................................42
9.1 Security .......................................................................................................42
9.2 Maintenance Plan.........................................................................................42
9.3 Maintenance Procedures ..............................................................................43
10 Fast Reference for Troubleshooting ..........................................................46
11 Contact Information ......................................................................................49
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