產品詳情介紹
UAA326A04信號控制板
輸入線應過大以便提供盡可能低的阻抗，因為會產生高峰值電流。輸入線通過外殼后部的導管開口插入。拆除導管開口附近的蓋板，即可接近輸入接線端子。這些端子為壓力連接器類型。使用足夠重的導線將負載連接到POS和NEG輸出端子，以防止輸出端子和負載之間的IR大幅下降。遙感可用于補償IR下降。參見第3.3.2段。注：兩個輸出端子都是浮動的，可以接地，也可以在底盤接地電壓低于600V的任何電壓下操作。出廠前，所有過壓電路均已正確調整至各自的裝置。對于小于最大輸出電壓的跳閘電平，或簡單檢查過電壓電路：A.將電位計設置為順時針方向。B.將電源輸出電壓調整為所需的跳閘電平。C、 逆時針緩慢調整電位計，直到OVP跳閘，關閉設置。一旦點燃，SCR將保持開啟，直到陽極電壓被移除（降低到其“開啟”電平以下）或陽極電流降至最低“保持”電流以下。過電壓范圍為裝置最大輸出電壓的50%至100%。如果上述任何事件沒有發(fā)生，則電源有缺陷，不得運行。根據具體情況，需要進行本手冊其他部分所述的保修服務或故障排除。
控制裝置和指示器
前面板表面包含在正常模式下操作電源所需的所有控制裝置和指示燈。以下檢查程序描述了前面板控制裝置和指示器的使用（圖1，第3.3.1節(jié)），并確保電源正常工作。電源的初步檢查是在未連接負載的情況下完成的。a、 如圖1所示，檢查裝置背面的屏障跳線帶是否處于正常模式。b、 完全逆時針設置所有控件。c、 將斷路器（1）開/關開關轉到“開”。風扇將立即啟動。由于將出現軟啟動電路輸出，在10-15秒延遲后按下啟動按鈕。d、 所有三相指示燈必須點亮。e、 前進電流控制（6）半圈，緩慢前進電壓控制（3）。當此控制完全順時針推進時，直流電壓表（4）將從零偏轉至電源的最大額定值。電壓指示器（5）將點亮。f、 完全逆時針返回所有控件。g、 要檢查恒定電流，首先關閉電源。將短路棒連接到電源背面的正負輸出端子上。h。按下啟動按鈕。順時針推進電壓控制（3）一圈，然后緩慢推進電流控制（6）。順時針推進此控制時，直流電流表（8）將從零平穩(wěn)偏轉至電源的額定電流。電流指示燈（7）將點亮。i、 完全逆時針返回所有控制裝置并關閉裝置。斷開輸出短路棒。3.1.1 OVP操作如果電源配備過電壓撬桿，前面板將包含過電壓調整（9）。該電位計可通過前面板上的檢修孔進行調整。
The input wires should be oversized
so as to provide as low an impedance as practical, since high peak currents are drawn. Input wires are inserted through the conduit opening in the rear of the enclosure. Access to the input wiring terminals is made by removing the cover plate adjacent to the conduit opening. These terminals are of the pressure connector type. Connect the load to the POS and NEG output terminals using heavy enough leads to prevent substantial IR drops between the output terminals and the load. Remote sensing can be used to compensate for IR drops. See paragraph 3.3.2. NOTE: Both output terminals are floating and either may be grounded or operated at any voltage less than 600V with respect to chassis ground.All overvoltage circuitry has been properly adjusted to their respective unit before leaving the factory. For trip levels less than the maximum output voltage or to check the overvoltage circuitry simply: A. Set the potentiometer fully clockwise B. Adjust the power supply output voltage to the desired trip level. C. Slowly adjust the potentiometer counterclockwise until OVP trips turning off the set. Once fired, the SCRs remain on until the anode voltage is removed (decreased below its "on" level) or until anode current falls below a minimum "holding" current. The overvoltage range is from 50% to 100% of the maximum output voltage of the unit. If any of the above events does not occur, the supply is defective and must not be operated. Depending on circumstances either warranty service or troubleshooting as described elsewhere in this manual is required.
CONTROLS AND INDICATORS
The front panel surface contains all the controls and indicators necessary to operate the supply in its normal mode. The following checkout procedure describes the use of the front panel control and indicators (Figure 1, Section 3.3.1) and ensures that the supply is operational. This preliminary check of the power supply is done without a load connected. a. Check the barrier jumper straps on the back of the unit, as shown in Figure 1, for normal mode. b. Set all controls completely counterclockwise. c. Turn the CIRCUIT BREAKER (1) on/off switch to "on". The fans will start immediately. Push the Start Button after a 10-15 second delay due to the soft start circuit output will occur. d. All 3 Phase Indicators must be lit. e. Advance CURRENT CONTROL (6) one-half turn and slowly advance VOLTAGE CONTROL (3). The DC VOLTMETER (4) will deflect from zero to maximum rating of the supply as this control is advanced completely clockwise. The VOLTAGE INDICATOR (5) will be lit. f. Return all controls completely counterclockwise. g. To check out constant current, first turn-off supply. Connect a shorting bar across the plus and minus output terminal at the back of the power supply.h. Push the Start Button. Advance the VOLTAGE CONTROL (3) one turn clockwise and slowly advance the CURRENT CONTROL (6). The DC AMMETER (8) will deflect smoothly from zero to the rated current of the supply as this control is advanced clockwise. The CURRENT INDICATOR (7) will be lit. i. Return all controls completely counterclockwise and turn unit off. Disconnect output shorting bar. 3.1.1 OVP OPERATION If supply is equipped with an overvoltage crowbar, the front panel will contain OVERVOLTAGE ADJUSTMENT (9). This potentiometer may be adjusted through an access hole in the front panel.
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