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Page 45 of 277
Table 15: ST-3708 RTD Connections (cont'd.)
Pin No.
Description
19
AGND
20
AGND
3.2.5
Backspin Probes
ESP motors do not immediately come to a stop when power is removed. Instead the column of
fluid from the top of the pump to the surface falls back down the tubing causing the pump to spin
backwards. Starting the ESP motor during this
“backspin” can cause damage to the pump or
motor. Backspin Probes provide Apollo the ability to detect when backspin is occurring. Apollo
can then be programmed to wait until the backspin has ended before starting the ESP motor.
A motor in backspin generates a voltage back up the motor lead cables to the transformer.
Backspin Probes measure this motor voltage at the output of the step-up transformer. The
probes are connected to the Apollo EIO board via three AC inputs and are installed inside an
external enclosure mounted to the VSD as shown in
Figure 19: Backspin Probes-Drawing
. Part Number 197543 consists of the external enclosure and the backspin probe
assembly. Currently, backspin input is not supported by RSTi.
Figure 19: Backspin Probes-Drawing 1
Содержание Apollo 3
Страница 1: ...Copyright 2020 Baker Hughes Company All rights reserved Page 1 of 277...
Страница 46: ...Copyright 2020 Baker Hughes Company All rights reserved Page 46 of 277 Figure 20 Backspin Probes Drawing 2...
Страница 139: ...Copyright 2020 Baker Hughes Company All rights reserved Page 139 of 277 Figure 116 Murphy Switch Trigger Example 1...
Страница 266: ...Copyright 2020 Baker Hughes Company All rights reserved Page 266 of 277 Figure 227 USB Menu...
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Страница 277: ...Index 129112 28 197705 28 197349 28 800638 28 197350 28 810280 28 197351 29...