產品詳情介紹
A-B 80190-380-02-R控制器板
速度設置控件。如果外部速度微調的調整導致不穩定，請使用歐姆表檢查電位計的異常行為（關閉電源）。必要時使用非潤滑型電氣清潔劑。如果內部轉速電位計有故障，則更換控制裝置。確保致動器從空載到滿載移動大約2/3的行程。確保渦輪、柴油和燃油噴射原動機上的連桿是線性的。確保化油器原動機上的連桿是非線性的。有關正確安裝，請參閱致動器手冊。必要的外部電線未正確屏蔽。由于帶有交流電壓的電線、變壓器的雜散磁場等引起的電氣噪聲可能會被屏蔽不當的電線拾取。如果噪聲被與放大器求和點相關的線路拾取，如外部速度微調、并聯線路、下垂觸點、磁性拾取線路和同步器輸入，則會導致不穩定。驗證開關柜框架、調速器底盤和原動機是否具有公共接地連接。暫時從控制蓄電池系統上拆下蓄電池充電器電纜。如果通過上述修改，原動機的操作得到了顯著改善，則應一次更換一根電線，以查找故障源。外部接線可能需要額外屏蔽或從高電流線路或部件重新布線。檢查電源電壓，低壓控制裝置上的電壓應至少為20 Vdc，高壓控制裝置上應至少為90 Vdc或88 Vac。用跳線替換速度微調，用主速度電位計設置速度，以此進行檢查。
原動機不與其他機組分擔負載。
如果通過上述檢查無法解決問題，則需要從開關設備上拆除2301A控制裝置。臨時將其安裝在原動機旁邊，僅將電池、磁性拾音器和致動器連接至控制器（使用放置在原動機旁的單獨電池）。起動原動機后，在端子19和16之間放置一根小跳線，使原動機加速至額定速度。如有必要，施加荷載以檢查穩定性。如果控制器安裝在原動機旁邊時出現穩定性，則將控制器返回開關設備。運行新的電磁拾波器、執行器和蓄電池電源線。將所有導線屏蔽至控制裝置。將所有電線穿過導管或外屏蔽。將外護罩系到控制裝置對面的系統接地端。檢查執行器連桿與燃油控制機構之間的運動是否丟失、卡滯或負載過大。確認穩定的燃油壓力值正確。根據適當的致動器手冊檢查致動器。如果致動器的電壓為最大值（反向作用時為最小值），目視確定致動器軸是否處于最大位置。如果沒有，則表明執行器有問題，或連桿或燃油系統受限。如果致動器有備用球頭，則檢查其液壓調速器部分、速度設置和速降調整是否正確設置（參見適用的調速器手冊）。
Speed setting controls.
If adjustment of external speed trim causes instability, check potentiometer with ohmmeter for erratic behavior (turn power off). Use non-lubricating electrical cleaner if necessary. If internal speed potentiometer is faulty, replace control.Make sure that actuator moves approximately 2/3 of its travel from no load to full load. Be sure linkage is linear on turbine, diesel, and fuel-injected prime movers. Be sure linkage is non-linear on carbureted prime movers. Refer to actuator manual for proper installation.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.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.Check supply voltage, It should be at least 20 Vdc on low voltage controls and 90 Vdc or 88 Vac on high voltage controls.Check by replacing Speed Trim with jumper and setting speed with main speed potentiometer.
Prime mover does not share load with other units.
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.Check actuator linkage to fuel controlling mechanism for any lost motion, binding, or excessive loading. Verify a steady fuel pressure of proper value. Check actuator per appropriate actuator manual.If voltage to actuator is maximum (minimum for reverse-acting), visually determine if actuator shaft is at maximum position. If it is not, an actuator problem is indicated, or the linkage or fuel system is restricted.If actuator has a ballhead backup, verify that its hydraulic governor section, speed setting, and speed droop adjustments are properly set (see the applicable governor manual).
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