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Revision 06 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DB10 • 864-5091.9
26.1 Installation of voltage transformers
type 4MT3 on the busbar ................................. 97
26.2 Installation of voltage transformers
type 4MU4 on the busbar............................... 101
26.3 Installation of voltage transformers
type 4MT7 at the cable feeder........................ 104
27
Removal of voltage transformers.................... 107
27.1 Removal of voltage transformers
type 4MT3 from the busbar............................ 107
27.2 Removal of voltage transformers
type 4MU4 from the busbar ........................... 109
27.3 Removal of voltage transformers
type 4MT7 from the cable feeder ................... 111
28
Busbar components ....................................... 113
28.1 Voltage transformer damping resistor ............ 113
28.2 Voltage transformer with or without
three-position disconnector ........................... 114
28.3 Solid-insulated bar (V-type bar) ...................... 116
28.4 Gas-insulated bar ........................................... 120
28.5 Busbar connection S2 and S3 ......................... 124
28.6 Busbar earthing switch................................... 126
28.7 Capacitive voltage tap at the busbar............... 127
29
Tests.............................................................. 128
29.1 Checking the SF6 gas filling ........................... 128
29.2 Monitoring the gas pressure........................... 129
29.3 Checking the circuits of the low-voltage
equipment..................................................... 130
29.4 Checking high-voltage connections ................ 130
29.5 Checking electrical connections ..................... 130
29.6 Checking protection against environmental
influences...................................................... 130
30
Final installation work.................................... 131
30.1 Mounting cables with plugs ........................... 131
30.2 Connecting low-voltage cables....................... 131
30.3 Mounting the metal covers ............................ 132
31
Installation of degree of protection
version IP31D................................................. 133
31.1 IP31D - protection against vertically
falling water drops......................................... 133
32
Installation of rear walls of switchgear ........... 135
33
Installation of end walls ................................. 138
34
Commissioning.............................................. 143
34.1 Checking the installation work ....................... 143
34.2 Test operation................................................ 143
34.3 Checking the accessories................................ 145
34.4 Correcting circuit diagrams ............................ 145
34.5 Instructing the operating personnel ............... 145
Operation........................................................146
35
Control elements and indicators..................... 146
36
Circuit-breaker operation ............................... 148
36.1 Closing the circuit-breaker manually............... 148
36.2 Opening the circuit-breaker manually............. 148
36.3 Emergency release of the circuit-breaker ........ 149
36.4 Recommendation for sealing
the pushbuttons ............................................ 150
36.5 Test operation without auxiliary voltage......... 150
36.6 Test operation with auxiliary voltage
(motor operating mechanism) ....................... 151
36.7 Charging the closing spring manually............. 151
37
Operating the three-position disconnector ..... 152
37.1 Control elements and indicators..................... 152
37.2 Closing the three-position disconnector
manually ....................................................... 154
37.3 Opening the three-position disconnector
manually ....................................................... 155
37.4 Activating the ready-to-earth function
manually ....................................................... 155
37.5 Deactivating the ready-to-earth function
manually ....................................................... 157
37.6 Three-position disconnector with auxiliary
voltage (motor operating mechanism) ........... 157
37.7 Emergency release of the interlock
with solenoids at the three-position
disconnector.................................................. 158
37.8 Emergency operation of the three-position
disconnector.................................................. 159
38
Feeder earthing and de-earthing .................... 166
38.1 Feeder earthing ............................................. 167
38.2 Feeder de-earthing ........................................ 167
39
Operating the busbar make-proof earthing
switch............................................................ 168
39.1 Control elements and indicators..................... 168
39.2 Closing .......................................................... 169
39.3 Opening ........................................................ 170
39.4 Emergency release of the interlock with
solenoids at the busbar earthing switch.......... 171
40
Interlocks....................................................... 173
41
Verification of safe isolation from supply ........ 176
41.1 LRM plug-in sockets ....................................... 176
41.2 Indications VOIS, VOIS R+,
CAPDIS -S1+/-S2+........................................... 177
41.3 Indications WEGA 1.2, WEGA 2.2.................... 179
42
Overview of switching operations .................. 180
42.1 Switching operations
in the circuit-breaker panel ............................ 180