AS-BDAU-204通道隔離模塊
必要的外部電線適當屏蔽。
接線引起的電氣噪聲
攜帶交流電壓，雜散來自可以選擇變壓器等通過不適當的屏蔽線連接。
如果出現以下情況，噪聲將導致不穩定：
由關聯的行拾取與放大器求和點例如外部速度微調，并聯線、下垂接觸，磁拾取線，以及同步器輸入。
以下測試將隔離噪聲和干擾通知
請勿在以下情況下執行這些測試：單臺機組運行配置。
跨接端子19至端子16（端子在高壓控制上為0），然后將其移除用于額定觸點的閉合導線。
在使用外部速度微調的情況下，跨接端子23和24，然后拆下連接電位計的電線。
警告
如果跳線為，原動機可能超速運行時安裝。
拆下端子10、11、12、14的導線，25和26。跳線14和16。
拆下導線，使燃油降到最低端子17處的觸點。
驗證開關柜框架、調速器底盤和原動機有一個共同點接地連接。暫時刪除來自控制器的蓄電池充電器電纜電池系統。如果原動機運行顯著通過上述修改改進，一次更換一根導線以定位麻煩的根源。
外部接線可能需要額外的屏蔽或重路由高電流線路或部件。
如果問題無法通過解決在上述檢查中，有必要：從開關設備上拆下2301A控制器。暫時將其安裝在主設備旁邊移動并僅連接一個電池，磁性傳感器和執行器連接到控制裝置（使用單獨的電池放置在主電池旁邊移動器）。在起動原動機之后，在端子之間放置一根小跨接導線19和16，以使原動機
加速至額定速度
如果需要，施加負載以檢查穩定性。
如果在以下情況下發生穩定性：安裝在原動機旁邊，返回對開關設備的控制。運行新的磁性傳感器、執行器和電池電力線。屏蔽控制裝置的所有導線。
通過導管或外部布線所有導線盾將外護罩系到系統上接地在控制裝置的相反端。
Necessary external wires not
properly shielded.
Electrical noise, caused by wiring
carrying an ac voltage, stray
magnetic fields from
transformers, etc., can be picked
up by improperly shielded wire.
Noise will cause instability if
picked up by lines associated
with the amplifier summing point
such as external speed trim,
paralleling lines, droop contact,
magnetic pickup lines, and
synchronizer input.
The following tests will isolate noise and
interference.
NOTICE
Do not perform these tests in other than
single-unit operating configuration.
Jumper terminal 19 to terminal 16 (terminal
0 on high voltage controls), and remove
wires to the Close for Rated contact.
Where an external speed trim is used,
jumper terminals 23 and 24, and remove
wires to the potentiometer.
WARNING
Prime mover may overspeed if jumper is
installed while running.
Remove wires to terminals 10, 11, 12, 14,
25, and 26. Jumper 14 and 16.
Remove the wires to the minimum-fuel
contact at terminal 17.
Verify that the switchgear frame, governor
chassis, and prime mover have a common
ground connection. Temporarily remove the
battery-charger cables from the control
battery system.
If the prime-mover operation is significantly
improved by the above modifications,
replace the wiring one at a time to locate
the source of the trouble.
External wiring may require additional
shielding or rerouting from high-current
lines or components.
(continued below)(cont.)
If the problem cannot be resolved by the
above checks, it will be necessary to
remove the 2301A control from the switchgear. Temporarily mount it next to the prime
mover and connect only a battery, magnetic
pickup, and actuator to the control (use a
separate battery placed next to the prime
mover). After starting the prime mover,
place a small jumper wire across terminals
19 and 16 to cause the prime mover to
accelerate to rated speed. If necessary,
apply load to check stability.
If stability occurs when the control is
mounted next to the prime mover, return the
control to the switchgear. Run new
magnetic pickup, actuator, and battery
power lines. Shield all wires to the control.
Route all wires through conduit or an outer
shield. Tie the outer shield to system
ground at end opposite of the control.
