SST-PB3-CLX-RLL模塊PLC卡件
如一般信息部分所述，下垂模式允許以下操作：
無(wú)限總線上或與其他發(fā)動(dòng)機(jī)發(fā)電機(jī)組并聯(lián)的發(fā)電機(jī)使用液壓機(jī)械調(diào)速器。在降速時(shí)，速度隨負(fù)載的變化而變化發(fā)電機(jī)發(fā)生變化。負(fù)載增加導(dǎo)致速度降低。這個(gè)速度變化或下降量以百分比表示，由下垂電位計(jì)如圖4-5所示。2301A負(fù)載共享和速度控制由直流-直流隔離供電
電源，允許在寬電壓范圍內(nèi)運(yùn)行，無(wú)需產(chǎn)生過(guò)多的熱量。這種隔離保護(hù)系統(tǒng)免受干擾
由接地回路引起，特別是通過(guò)負(fù)載共享線路，并允許與伍德沃德負(fù)荷分擔(dān)控制的早期模型進(jìn)行負(fù)荷分擔(dān)。
第五章。故障排除
以下故障排除指南有助于隔離控制裝置的故障
接線盒、致動(dòng)器、設(shè)備接線或其他地方。超出此級(jí)別的故障排除是：
當(dāng)有完整的控制測(cè)試設(shè)施可用時(shí)才推薦。錯(cuò)誤的電壓可能會(huì)損壞控制器。更換時(shí)
a控制，檢查電源、電池等是否正確
電壓故障排除程序
表5-1是隔離系統(tǒng)問(wèn)題的一般指南。本指南假設(shè)：
系統(tǒng)接線、焊接連接、開(kāi)關(guān)和繼電器觸點(diǎn)，以及輸入和輸出連接正確，工作狀態(tài)良好。使按指定順序檢查。各種系統(tǒng)檢查假設(shè)
檢查已正確完成。準(zhǔn)備在啟動(dòng)時(shí)緊急停機(jī)
發(fā)動(dòng)機(jī)、渦輪機(jī)或其他類型的原動(dòng)機(jī)，以防止失控或超速，可能造成人身傷害、生命損失，或財(cái)產(chǎn)損失。
表6-1.故障排除癥狀、原因和補(bǔ)救措施原動(dòng)機(jī)不會(huì)開(kāi)始致動(dòng)器不移動(dòng)到啟動(dòng)燃料位置
注意如果致動(dòng)器移動(dòng)到起始位置，a問(wèn)題原動(dòng)機(jī)燃料指示供應(yīng)。
電源電壓極性反轉(zhuǎn)（僅直流）或無(wú)電源電壓。檢查端子16的電壓是否正確（+）至15（–）。如果極性為不正確（僅限dc）。
執(zhí)行器對(duì)輸入無(wú)響應(yīng)來(lái)自控制的信號(hào)。
注意液壓執(zhí)行器必須具有：油壓和齒輪旋轉(zhuǎn)至操作（響應(yīng)）。
如果控制處有電壓輸出端子20（+）和21（-），但致動(dòng)器不移動(dòng)，連接至執(zhí)行器的導(dǎo)線應(yīng)檢查有無(wú)開(kāi)路或短路。具有EG3P執(zhí)行器，記住配合插頭的端子C和D應(yīng)：跳起來(lái)。檢查執(zhí)行機(jī)構(gòu)的電阻。
伍德沃德致動(dòng)器上的線圈電阻為：大約35?. （與線索一起閱讀：T20和T21斷開(kāi)。）
起動(dòng)燃油限制設(shè)置過(guò)低。順時(shí)針轉(zhuǎn)動(dòng)起動(dòng)燃油限制，直到起動(dòng)移動(dòng)器啟動(dòng)。
致動(dòng)器或連桿。檢查執(zhí)行機(jī)構(gòu)和連桿是否正確安裝和操作。問(wèn)題可能是供油、旋轉(zhuǎn)方向、不足排水連桿，磨損的執(zhí)行機(jī)構(gòu)或調(diào)整不當(dāng)。
As mentioned in the general information section, droop mode allows operation of
a generator on an infinite bus or in parallel with other engine generator units
using hydromechanical governors. In droop, speed changes as the load on the
generator changes. An increase in load results in a decrease in speed. The
amount of speed change or droop is expressed in percent, and is set by the
DROOP potentiometer shown in Figure 4-5.
The 2301A Load Sharing and Speed Control is powered by a dc-dc isolated
power supply, which allows operation over a wide voltage range without
generating excessive heat. This isolation protects the system from interference
caused by ground loops, particularly through the load-sharing lines, and allows
load sharing with earlier models of Woodward load-sharing controls.
Chapter 5.
Troubleshooting
The following troubleshooting guide is an aid in isolating trouble to the control
box, actuator, plant wiring, or elsewhere. Troubleshooting beyond this level is
recommended ONLY when a complete facility for control testing is available.
The control can be damaged with the wrong voltage. When replacing
a control, check the power supply, battery, etc., for the correct
voltage.
Troubleshooting Procedure
Table 5-1 is a general guide for isolating system problems. This guide assumes
that the system wiring, soldering connections, switch and relay contacts, and
input and output connections are correct and in good working order. Make the
checks in the order indicated. Various system checks assume that the prior
checks have been properly done.
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Table 6-1. Troubleshooting
Symptom Cause Remedy
Prime mover will not
start. Actuator not
moving to start-fuel
position.
NOTE—If the
actuator moves to
start position, a
problem with the
prime mover fuel
supply is indicated.
Supply voltage polarity reversed
(dc only), or no supply voltage.
Check for proper voltage from terminals 16
(+) to 15 (–). Reverse leads if polarity is
incorrect (dc only).
Actuator not responding to input
signal from control.
NOTE
The hydraulic actuator must have
oil pressure and gear rotation to
operate (respond).
If there is a voltage output at control
terminals 20 (+) and 21 (–), but the actuator
does not move, the wiring to the actuator
should be checked for opens or shorts. With
the EG3P actuator, remember that
terminals C and D of the mating plug should
be jumpered.
Make resistance checks at the actuator.
Coil resistance on Woodward actuators is
approximately 35 ?. (Read with leads at
T20 and T21 disconnected.)
Start fuel limit set too low. Turn start fuel limit clockwise until prime
mover starts.
Actuator or Linkage. Check actuator and linkage for proper
installation and operation. Problems may be
oil supply, direction of rotation, insufficient
drainage. linkage, worn actuator
components, or improper adjustment.
