EBARA BSP SS Operating And Maintenance Manual page 11

7.1 POWER CABLE SELECTION
Power cable that will be used should be appropriate to work under the
water. For power cable selection, you can either use the table below
or get in touch with Ebara to ask for help for this occasion. Unless the
power cable is selected as water-proof and appropriate to be used
under the water, the submersible pump is out of warranty.
Selection of power cable depends on the motor's power and the length
of cable. Table below shows the maximum cable lengths that can be
used depending on the motor power and cable size.
Power cable length of the motor is 1 x 5 m for DOL 2 x 5 m for S.D.
DIRECT ON-LINE START (D.O.L.)
HP Cable size [mm
5,5 65 108 172 258 431 689
7,5 48 80 129 193 322 515
10 38 64 102 153 256 409 639
12,5 52 83 125 209 334 522 730
15 45 72 109 181 289 452 633
17,5 61 92 153 245 383 536 765
20 52 79 131 210 327 458 655
25 106 170 266 372 531 744
30 90 145 226 316 452 633
35 76 122 190 266 380 532 722
40 67 107 168 235 336 470 638
50 89
60
70
75
80
90
100
110
125
135
150
STAR-DELTA START (S. D.)
HP Cable size [mm
5,5 97 161 258 388 646
7,5 72 121 193 290 483 773
10 57 96 153 230 383 613 958
12,5 47 78 125 188 313 501 783
15 41 68 109 163 271 434 678 949
17,5 34 57 92 138 230 367 574 803 982
20 29 49 79 118 196 314 491 688 797
25 40 64 96 159 255 398 558 678
30 54 81 136 217 339 475 570 949
35 46 68 114 182 285 399 503 798
40 60 101 161 252 352 418 705
50 84 134 209 293 344 585 794
60 69 110 172 241 297 481 653
70 59 95
]
2
139 195 279 390 529
115 160 229 321 434 548
139 198 278 377 476
131 187 262 356 450
120 172 241 326 411
154 215 292 368
132 192 261 329
127 178 242 305
157 213 269
145 197 249
182 230
]
2
149 208 281 416 565
HP Cable size [mm
75 90
80 82
90 74
100
110
125
135
150
7.2 CONNECTION OF POWER CABLES
Connection of the power cable that will be used along the well and until
the control panel with the power cable on the motor must be done very
carefully and by the professionals only. Unless the insulation after the
connection is well done, short circuit might happen when the connec-
tion area is in the water. lnsulation of each cable should be stripped
only as far as necessary to provide room for a stake type connector.
Each individual joint should be taped with rubber electrical tape, us-
ing twolayers by wrapping tightly for eliminating airspaces as much
as possible.
Total thickness of tape should be no less than the thickness of the
cable insulation in order to prevent the smashing of the cables when
the pump is lowered in the well
7.3 CONNECTION OF THE SUBMERSIBLE PUMP TO CONTROL
PANEL
After the installation of the submersible pump in the well, power cables
that are coming out of the pump should be connected to the electri-
cal control panel. This process should be done by only a professional
electrician. Electrical control panel should be protected from the water
and moisture. The most important thing that should be taken into con-
sideration is that the power cables should not be smash or bended.
Connections to the electrical control panel should be done depending
on the schematic instructions that are taped inside the electrical control
panel's cover. Liquid level electrodes should be also connected de-
pending on the instructions. Before the connection between electrical
control panel and the main system of electricity, it should be checked
with a circuit tester to be sure there is no electricity in the control panel.
Before the connection of the electrical control panel is done, power
cable's insulation should be controlled by a Meger Tester.
7.4 EQUIPMENTS OF CONTROL PANEL
1) Main contact breaker is used to cut off the power that comes to the
control panel.
2) Thermal relay is used to protect the motor when it absorbs exces-
sive current.
3) Fuse is used to protect the line if there is any short circuits at the
power cables or the motor.
4) Control key
5) Liquid level control relay is used to control the water level and
prevent the pump working without water by the help of the liquid
level electrodes that are installed in the well. When the water is at
]
2
141 197 258 394 534 675
129 180 231 361 490 619
115 162 206 323 439 554
EN
103 144 191 289 392 495
95 134 168 267 363 458
118 144 235 319 402
109 133 218 295 371
123 201 273 344
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