AS-BDAU-204通道隔离模块
必要的外部电线适当屏蔽。
接线引起的电气噪声
携带交流电压，杂散来自可以选择变压器等通过不适当的屏蔽线连接。
如果出现以下情况，噪声将导致不稳定：
由关联的行拾取与放大器求和点例如外部速度微调，并联线、下垂接触，磁拾取线，以及同步器输入。
以下测试将隔离噪声和干扰通知
请勿在以下情况下执行这些测试：单台机组运行配置。
跨接端子19至端子16（端子在高压控制上为0），然后将其移除用于额定触点的闭合导线。
在使用外部速度微调的情况下，跨接端子23和24，然后拆下连接电位计的电线。
警告
如果跳线为，原动机可能超速运行时安装。
拆下端子10、11、12、14的导线，25和26。跳线14和16。
拆下导线，使燃油降到最低端子17处的触点。
验证开关柜框架、调速器底盘和原动机有一个共同点接地连接。暂时删除来自控制器的蓄电池充电器电缆电池系统。如果原动机运行显著通过上述修改改进，一次更换一根导线以定位麻烦的根源。
外部接线可能需要额外的屏蔽或重路由高电流线路或部件。
如果问题无法通过解决在上述检查中，有必要：从开关设备上拆下2301A控制器。暂时将其安装在主设备旁边移动并仅连接一个电池，磁性传感器和执行器连接到控制装置（使用单独的电池放置在主电池旁边移动器）。在起动原动机之后，在端子之间放置一根小跨接导线19和16，以使原动机
加速至额定速度
如果需要，施加负载以检查稳定性。
如果在以下情况下发生稳定性：安装在原动机旁边，返回对开关设备的控制。运行新的磁性传感器、执行器和电池电力线。屏蔽控制装置的所有导线。
通过导管或外部布线所有导线盾将外护罩系到系统上接地在控制装置的相反端。
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.
