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UR8GH保护继电器
一次打开一个单元直到电源电流能力的总和超过所消耗的负载电流。5.使用电压控制平衡每个单元电压，以获得相等的输出电流。6.将电流控制设置为仅限制在运行电流之上，这样，如果一个装置的输出电压向上漂移，它就会受到电流限制，而不是承载过多的负载电流份额。重要事项：当装置包含过电压选项时，未经咨询电子测量工程人员，请勿将其并联。如果其中一个并联单元在未正确并联OVP选项的情况下进入过电压，将发生不可修复的损坏。在此配置中，指定为主电源的电源用于控制所有其他电源（称为从电源）的电压和电流操作。1.断开所有从机的以下跳线：TB3-13和14 TB3-9、10和11 2.在所有从机TB3-10和12之间连接跳线。3.如图9A或9B所示，连接每个电源的主电源TB3-12和TB3-13。4.将每个从机的电压控制调整到最大CW。5.正负电压连接见图9A或9B。6.打开每个从属设备，然后打开主设备。7.根据需要的输出电压或电流调整主控。每个电源的输出引线必须对电源附近的负载点具有相等的电阻，以确保均匀分配。
串联操作
只需将一个单元的负极输出端子连接到另一个单元正极输出端子，即可串联两个EMHP电源。每个单元的调节功能独立，总输出电压是每个单元输出电压的总和。注意：任何输出端子上的电压相对于底盘接地不得超过600V。请咨询Electronic Measurements，股份有限公司工程部，了解两个以上电源的串联操作。远程仪表远程电压表可连接在端子TB3-2（位置）和TB3-7（负极）之间。如果同时使用遥感，远程电压表将指示负载电压。为了指示电源输出端子处的电压，在端子TB3-1（位置）和TB3-8（负极）之间连接远程电压表。远程毫伏表可连接在端子TB3-12（负极）和TB3-14（位置）之间。除非另有规定，否则这些端子上的0至100毫伏电压表示输出电流从零到满额定值（见主示意图）。为了补偿远程长电流表引线中的电压降，将满标度灵敏度小于100毫伏的电流表移动装置与校准电阻器串联使用。远程仪表的导线应扭曲，如果存在强交流或射频场，则应屏蔽导线。屏蔽的一端应接地至端子TB3-14，另一端保持浮动
Turn units on one at a time
until the sum of the power supply current capabilities exceeds the load current drawn. 5. Using the voltage controls balance each unit voltage for equal output current. 6. Set the current controls to limit just above running current so that if a unit's output voltage drifts upward, it will become current limited rather than carry an excessive share of load current. IMPORTANT: When the units contain the overvoltage option do not connect them in parallel without consulting the Engineering Staff of Electronic Measurements. Irreparable damage will occur if one of the paralleled units goes into overvoltage without proper paralleling of the OVP option.In this configuration, the power supply designated the master is used to control the voltage and current operation of all other supplies, referred to as slaves. 1. Disconnect the following jumpers of all slaves: TB3-13 and 14 TB3-9, 10 and 11 2. Connect a jumper between TB3-10 and 12 of all slaves. 3. Connect the master supply TB3-12 and TB3-13 of each supply as shown in either Figure 9A or 9B. 4. Adjust the voltage control of each slave to maximum CW. 5. See Figure 9A or 9B for + and - voltage connection. 6. Turn each slave on and then the master. 7. Adjust the master for required output voltage or current. The output leads from each power supply must be of equal resistance to a point of load near the supply to assure equal sharing.
SERIES OPERATION
Two EMHP power supplies can be operated in series simply by connecting the negative output terminal of one unit to the positive output terminal of the other. The adjustment of each unit functions independently and the total output voltage is the sum of each unit output voltage. NOTE: The voltage at any output terminal must never exceed 600V with respect to chassis ground. Consult Electronic Measurements, Inc. Engineering Department for series operation of more than two supplies.REMOTE METERS A remote voltmeter may be connected between terminals TB3-2 (pos.) and TB3-7 (neg.). If remote sensing is also being used, the remote voltmeter will indicate the voltage at the load. To indicate the voltage at the power supply output terminals connect the remote voltmeter between terminals TB3-1 (pos.) and TB3-8 (neg.). A remote millivoltmeter may be connected between terminals TB3-12 (neg.) and TB3-14 (pos.). A voltage of 0 to 100mv across these terminals indicates output current from zero to full rating unless otherwise specified (see main schematic). To compensate for voltage drops in long remote ammeter leads a meter movement having a full-scale sensitivity of the less than 100mv is used in series with a calibrating resistor. The leads to the remote meters should be twisted, and if strong AC or RF fields are present, the leads should be shielded. One end of the shield should be grounded to terminal TB3-14 and the other end left floating
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