GE AT686W-1-1-1-1便攜式溫度儀
相位校正程序要求關(guān)閉原動機(jī)多次斷開電流互感器。為方便起見
圖3-2所示電流互感器的臨時(shí)連接方法為：
推薦。連接a 1?, 每個電流上的5W負(fù)載電阻器
變壓器允許電流互感器與端子斷開
卸下所有負(fù)載后，在原動機(jī)運(yùn)行的情況下進(jìn)行剝離。
高電壓：電流互感器可能會產(chǎn)生危險(xiǎn)高電壓。不要斷開電流互感器
原動機(jī)正在運(yùn)行，除非臨時(shí)1?, 5 W電阻器為：
如圖3-2所示安裝，并移除所有負(fù)載。圖3-2變壓器相位校正的臨時(shí)接線
如果上述和圖3-2所示的臨時(shí)負(fù)載電阻器為：未使用時(shí)，除移除負(fù)載外，還必須關(guān)閉原動機(jī)在以下過程中。
在本步驟中，通過連接電壓表測量負(fù)載信號電壓跨接負(fù)載信號端子11（–）和13（+）。
1.關(guān)閉原動機(jī)。
2.用您認(rèn)為應(yīng)該的相位和極性標(biāo)記每個CT導(dǎo)線。盡管此標(biāo)識可能被證明不正確，但此步驟是必要時(shí)，以便在程序說明。
3.從端子6和7斷開B相CT導(dǎo)線。連接這些導(dǎo)線使用小螺釘和螺母將兩根電線連接在一起，并用膠帶固定連接。
4.從端子8和9上斷開C相CT導(dǎo)線。連接并貼上膠帶如步驟3所示，將這兩條導(dǎo)線連接在一起。
5.將A相CT的兩根導(dǎo)線連接到A相輸入端子4和5。
6.啟動原動機(jī)，施加全負(fù)荷，測量負(fù)荷信號電壓。啟動列表并記錄此電壓。7.卸載系統(tǒng)并反轉(zhuǎn)端子4和上的A相CT導(dǎo)線
8.施加全負(fù)載，測量負(fù)載信號，并記錄該電壓。
9.卸載系統(tǒng)，從端子4和5上拆下A相CT導(dǎo)線，并將它們連接到B相輸入端子6和7*
10.施加全負(fù)載，測量負(fù)載信號，并記錄該電壓。
2卸載系統(tǒng)并反轉(zhuǎn)端子6和上的A相CT導(dǎo)線
12.施加全負(fù)載，測量負(fù)載信號，并記錄該電壓。
13.卸載系統(tǒng)，從端子6和7上拆下A相CT導(dǎo)線，并將它們連接到C相輸入端子8和9*
14.施加全負(fù)載，測量負(fù)載信號，并記錄該電壓。
15.卸載系統(tǒng)并反轉(zhuǎn)端子8和上的A相CT導(dǎo)線
16.施加全負(fù)載，測量負(fù)載信號，并記錄該電壓。
17.卸載系統(tǒng)并比較六個電壓讀數(shù)*
The Phase Correction Procedure requires that the prime mover be shut down
many times to disconnect the current transformers. For convenience, a
temporary method of connecting the current transformers shown in Figure 3-2 is
recommended. Connecting a 1 ?, 5 W burden resistor across each current
transformer allows the current transformers to be disconnected from the terminal
strip with the prime mover running, after removing all load.
HIGH VOLTAGE—The current transformers can develop dangerously
high voltages. Do not disconnect a current transformer while the
prime mover is running unless temporary 1 ?, 5 W resistors are
Installed as shown In Figure 3-2, and all load is removed.
Figure 3-2. Temporary Wiring for Transformer Phase Correction
If the temporary burden resistors described above and shown in Figure 3-2 are
not used, the prime mover MUST be shut down in addition to removing the load
in the following procedure.
Measure the load-signal voltage in this procedure by connecting a voltmeter
across the Load Signal terminals 11 (–) and 13 (+).
1. Shut down the prime mover.
2. Label each CT wire with the phase and polarity that you think it should be.
Even though this identification may prove to be incorrect, this step is
necessary so that the individual wires may be identified during the
description of the procedure.
3. Disconnect the phase B CT wires from terminals 6 and 7. Connect these
two wires together using a small screw and nut, and tape the connection.
4. Disconnect the phase C CT wires from terminals 8 and 9. Connect and tape
these two wires together as in step 3.
5. Connect the two wires from the phase A CT to the phase A input terminals 4
and 5.
6. Start the prime mover, apply full load, and measure the load signal voltage.
Start a list and record this voltage. 7. Unload the system and reverse the phase A CT wires on terminals 4 and
5. *
8. Apply full load, measure the load signal, and record this voltage.
9. Unload the system, remove the phase A CT wires from terminals 4 and 5,
and connect them to phase B input terminals 6 and 7. *
10. Apply full load, measure the load signal, and record this voltage.
11. Unload the system and reverse the phase A CT wires on terminals 6 and
7. *
12. Apply full load, measure the load signal, and record this voltage.
13. Unload the system, remove the phase A CT wires from terminals 6 and 7,
and connect them to phase C input terminals 8 and 9. *
14. Apply full load, measure the load signal, and record this voltage.
15. Unload the system and reverse the phase A CT wires on terminals 8 and
9. *
16. Apply full load, measure the load signal, and record this voltage.
17. Unload the system and compare the six voltage readings. *
