TDK-Lambda EWS3000T系列单体式电源（使用说明书）.pdfTDK-Lambda E

文件名称: TDK-Lambda EWS3000T系列单体式电源（使用说明书）.pdf

所属分类: 其它

开发工具:

文件大小: 704kb

下载次数: 0

上传时间: 2019-11-01

提供者: weixin_********

下载 (704kb)

不能下载？报告错误

详细说明：TDK-Lambda EWS3000T系列单体式电源（使用说明书）pdf,TDK-Lambda EWS3000T系列单体式电源（使用说明书）3. TERMINAL CONNECTIONS 3-1 When Remote Sensing and ON/OFF Control Are to Be Used 3-phase +s爬 200 input TrIPUr o)。c Q。a。感 COl P888 Control Load rM‖ Relay or TtL ooad aDd kDTr HIPUT3. AC70n-740V Ground 0.50l4A 上网回 when a fixed-voltage power supply is to be used, the REF and PV terminals should be shorted together sing the short piece supplied (A short piece has been inserted between the REF and Pv terminals prior to shipment 3-2 When Remote Sensing and ON/OFF Control Are Not to Be User when no remote sensing is needed short the +5 terminal with the output terminal, and the -s terminal with the -output terminal respectively, using the twisted wires supplied. pto + Load CNT tcuT3粪nz00a4nV Ground 5.EDr1晶 Art IN When no oN/OFF control is needed, short the ToG terminal with the cNT termInal, using the short piece supplied Be sure to connect the remote sensing terminals. otherwise, the overvoltage protection circuit aclivaley to shut off the output .When a fixed-voltage power supply is to be used, short the REF and PV terminals together, using the short piece supplied. (A short plece has been inserted between the REf and Pv ter rnirals pr ior to shipment J 800082 4. DESCRIPTION OF THE FUNCTIONS AND PRECAUTIONS 4-1 Output Voltage Adjusting Procedure The output voltage setting can be changed by adjusting the output voltage trimmer pot (vAD))on the front panel. Turning the trimmer clockwise increases the output voltage. the output voitage setting should be within +% of the rated output voltage value 4-2 Remote Sensing Function This function is used to compensate for a voltage drop(line drop) due to the wiring between the power output terminal and the load terminal. the line drop compensation vol tage should be within +% of the rated output voltage value and be lower than the maximum output power value given in the power supply output power specification. As to the remote sensing wires, use shielded wires or twisted-pair w『es When the remote sensing function is not to be used short the +s terminal with the output terminal and the -S terminal with the- output terminal respectively, using the sensing wires supplied 4-3 ON/OFF Control function The output voltage can be turned on or off by an external signal without turning on or off the input power Shorting the toG and Cnt terminals together turns the output on, and opening these terminals turns off the output. When this function is not to be used, short the terminals together using the short piece supplied Note that the terminals have been shorted by a short piece prior to shipment Specifications and Functions 1. It is TTL compatible. The maximum voltage applied to the cnT terminal shall be less than 30V and the reverse voltage be less than-07 V. The control signal driver sink current shall be less than 3. 5 mA CNT level with 3,5mA reference to tog Power outpu CNT Sink current L(0.8V or less ON TOG Relay transistor, or TTL 30000+2 2. Control can also be exercised by opening or closing the contacts(switch, relay )or by turning the transistor on or off. (TOG-CNT shorted: Output ON, TOG-CNT opened: Output OFF) 3. Since the circuit is isolated from the input/output circuit by a photocoupler, control can be easily performed, independent of whether the power output is positive or negative. the tog terminal should be connected with the gnd of the control circu 4-4 Overcurrent Protection(Delay Shutdown OCP) If an overload or shorted condition occurs and continues for more than five seconds the output is shut off to protect the power supply and the load. To restore the output, it is necessary to shut off the input momentarily and, then turn on the input again. (as for the overcurrent detection time the pf signal duration is detected. If the unit leaves the overload condition within the specified time interval, the output automatically restores to normal 4-5 Overvoltage Protection(Tracking OVP) This unit incorporates an output shut-off manual reset type overvoltage protection function. If the output voltage exceeds the specified voltage value, this overvoltage protection function is performed to shut off the output. To restore the output, it is necessary to shut off the input momentarily and, then turn on the input again Since an automatic tracking system is employed, the overvoltage protection detection point follows the set output voltage so as to perform a protection, according to the output voltage, at all times. It should be noted that the overvoltage protection detection point is fixed and cannot be changed. ihe a valte of the specified voltage "Vo+a"(5 v type: 5V+1.0 to 2.0, OVP value: 6.0 to 7.0 V for 5 V output) is fixed when the set output voltage is V1.V,+a "is automatically set as the oVP detection point 4.6 Over Temperature Protection This unit incorporates an output shut-off manual reset type over temperature protection tunction. It the ambient temperature or the temperature inside the power supply exceeds a certain limit (detection temperature: 120C+ 10%), this function is performed to shut off the output. to restore the output after it is shut off by the over temperature protection, it is necessary to shut off the input and after the 3000g2 temperature falls, turn on the input again. When the output is shut off, a PF signal is indicated 4-7 Built-in Fan Stop Detection The three cooling fans incorporated in the power supply are monitored for proper operation If even one of the fans stops, the power output is shut off. At the same time a pf signal is indicated 4.8 Low Input Voltage Detection If the input voltage lowers to 140-165 VAC, the output is shut off. When the input voltage restores to normal, the output automatically recovers. 4-9 Low Output Voltage Detection If the output voltage lowers to 75% to 80% of the set voltage value due to an input voltage drop, instantaneous power failure, or output overcurrent protection, the PF (power fail signal goes to the H" level to indicate the occurrence of an output abnormalit Since an automatic tracking system is employed, the low output voltage detection point follows the set output voltage so that a detection point suited to the output voltage may be set at all times. The detection point is fixed and cannot be changed The specified value"Vox% to 80%"is fixed. If the set output voltage is v1 V1x75% to 80%"is automatically set as the detection point The Pf signal is an open collector output, and it is isolated from the input/output circuit by an photocoupler PF VE MAX= 30V Fc: MAx- 20mA TOG 4-10 Input Open Phase Detection If one of the 3-phase input lines becomes open, or if one phase voltage falls below 160 VAC the output will be shut off in about five seconds To restore the output to normal, once shut off the input and, after a while, apply a normal input line voltage again B008-2 4-11 Output Ripple The maximum ripple voltage(including noise)given in the specification is the value at the power supply output terminals. If the load wire is long, the ripple at the load end may be excessive unless an electrolytic/film capacitor is connected to the load end. It should also be noted that an accurate measurement cannot be made if the ground lead of the oscilloscope probe is too long 4-12 Input Surge Current Suppressing Function This unit incorporates a thyristor-based input surge current suppressing circuit. if the input power is removed and reapplied within five seconds, this function will not be performed due to the retention characteristics of the thyristor When two or more power supplies are to be used, the setting of the input switch and the selection of an external fuse should be carefully made. For information on the input surge current suppressing circuit, switch, etc, refer to the Nemic-Lambda general catalog. EwS 3000 Input Surge Current Waveform (Input: 200 VAC, in put phase angle: 90, load 100%, ambient temperature: 25C) 20A/DIV50mS/DIV 4- 13 Line Filter Ground Terminal (ACG Terminal) The aCG terminal on the front panel is connected with the ground midpoint of the line filter circuit incorporated in the power supply. When the power supply is to be used as a single unit short the ACG ter minal with the fg terminal, using the short piece supplied. When two or more power supplies are used, the leakage current increases accordingly To reduce the leakage current, remove the short piece between the ACG and FG terminals. Further, to minimize noise install a noise filter on the input line side B0008-2 Ac 1) RI ER3 AC2) ACG R1 R2. R: Bleeder resistor ACG FG F FG FG AC ACinput e 4-14 Parallel Connection Parallel connection of units can be used either(a)to increase the output current or( B) to use one unit as a back-up power supply (A)To increase the output current This power supply is provided with a current sharing function. with this function. up to five units can be operated to provide nearly uniform output currents, while monitoring each others output currents (a) To use the current sharing function, connect the PC terminals of the power supplies with each other. (b)Set the same output voltage. (c) Use the same output load wires (d) For each unit, the output current should not be more than rn% of its rated output current value Power supply Load 800082 (B) To use one unit as a back-up power supply Two supplies (one being a back-up)can be used for one load to improve the reliability of the system (a)Set Lhe same output voltage. b)Use the same output load wires. (c)The power supply output voltage should be increased in consideration of the diode forward voltage drop(va) (d) The power supply output voltage and output power should be within the ificatio Output power(w)=(Vo+ve) lo Power supply v e ) Vo +V 4-15 Series Connection Series connection of units can be used either(A) to increase the output voltage or ( B) to use them as t power supplies Power supl Power supply ° utput terminal terminal Load output terminal (B) 30008-2 4-16 Master-Slave Operation Two or more power supplies can be connected in parallel so that one unit(master power supply) may control the output voltages of the other units (slave power This function can be used only when the power supplies are of the same type (up to five units). (a) To use the current sharing function, connect the pc terminals of the power supplies with each other. b)Connect the Pv terminals of the power supplies with each other. (c) Connect the REF and pv terminals of the master power supply (d) Use the same output load wires. (e) for each unit, the output current should not be more than 80% of its rated output current value Power supply ⊕ PC Master Load REF PC REF PC Slave PV 0008-2 10

(系统自动生成,下载前可以参看下载内容)