14--DZT高频开关电源整流模块说明书.doc

DZT4810/4820Instruction ManualDZT4810/4820 High Frequency Switch Power Regulation ModuleInstruction ManualGKA2.939.073/074SSTelecommunications Company ofJiangsu Hongtu High-tech Co., Ltd.1 IntroductionWith optimized computer-aided design, DZT series high frequency switch power regulation module is basic power supply equipment for telecommunication installations. The module is available in two types - DZT4810 (current output -10A) and DZT4820 (current output - 20A). With the use of high frequency PWM technology (300kHz clock), it contains unique parallel connection current-sharing technique and complete data interfaces, and realizes the functions of automatic current sharing, fault isolation, remote current limiting and remote control. The module is mainly equipped for program controlled exchange, microwave, optic fiber and mobile telecom devices. It may well be used as electric charger for storage batteries. It is light and small and it has high reliability and good voltage stabilizing performances.2 Operating Principle and Main Performance Properties2.1 Operating PrincipleSee Fig. 1 for the schematic diagram of DZT4810/4820 module. Single-phase alternating current first comes into peak suppressing and EM1 filter circuit. The circuit has two functions: 1. Protect the module from possible hazards of voltage peaks caused by switching operations of power loads or lightning in the power network; 2. Prevent the noise voltage and reverse current produced in the high frequency switch in the module.Fig. 1 Schematic Diagram of DZT4810/4820 ModuleMain control unit assumes the functions of input voltage control, Pulse-Width Modulation, and the control of output voltage, output current and battery interface. The unit processes the values of output voltage and current sample and sends them to the display unit.All the technical specifications of the DZT4810/4820 module comply with the requirements of YD/T731-2002.The serial number of its Network Access License issued by Ministry of Information Industry is 25-4819-011458.2.2 Main Performance Specifications AC input: Rated single phase input voltage: AC 220V 50Hz Input voltage fluctuation: AC 175V265V Input current: 8A ( DC48V/20A output ) Power-on surge: none AC220V input (full load) Nominal DC voltage output: DC 53.5V/10A20A Range of output voltage adjustment: DC 43.2V57.8V Output current: 10A/20A (DZT4810/4820) Base value of charging current: 2.5A/5A (can be manually set up) Load regulation rate: 0.5%(Input AC220V/output DC48V, load is 10%100%) Line regulation rate: 0.3% (Input AC185V255V，output DC48V/fullload) Overcurrent protection value: 11A/21A1A (DZT4810/4820) Temperature coefficient: 0.0002 (ambient temperature: -25+55) Noise output (Differential Mode): 150mVp-p (AC220V, full load, 020MHz) Output ripple (Differential Mode): 2mV(AC220V, full load, telephone Psophometrically weighted noise) Dynamic response: 200us (25%75% stage flop load 阶跃负载) 200us (-15%+10% stage flop power network阶跃电网) Efficiency: 85% (when fully loaded) Line overvoltage/undervoltage: AC175V (power off when voltage is low) AC265V (power off in case of overvoltage) battery undervoltage: DC44V (off if there is no line power 无市电关闭?) DC47V(on if there is no line power 无市电恢复?) Ambient temperature: -25+55 (50% load when the temperature is above 40) Ambient temperature for storage: -55+85 Dimension: 482.6 mm300 mm88 mm (standard 19 inches 2U) Weight: 8kg MTBF: 1105 h2.3 Functions2.3.1 Control PanelSee Fig. 2 for the arrangement of the front panel and back panel of the module.power indicatorLCDHV. equalized charge voltage adjustmanual equalized charge/float charge switchforced battery supply indicator供电指示灯forced battery supply buttonbattery-on buttonfuse for battery inputcharge currentsetupbus interfaceoutput load terminalbattery connectionpower buttonpower input socketoutput voltage/current selectionoutput voltage adjustbattery-onindicatorfanDZT4820Fig. 22.3.2 Panel Functions2.3.2.1 DisplayThe display consists of LCD and LED indicators. LCD display: values of output voltage and output currentFront panel power indicator: it gives line power indication when power button is pressed, it indicates normal input power if the indicator is lit normally; if the indicator blinks, it indicates that the device is in soft start-up or the line power or the output power is abnormal. Back panel battery-on (BAT.) indicator: it indicates battery and its relay are turned on. See to it that the battery wiring is correct. Then press the battery-on button. The indicator is lit after the battery relay closes.Back panel forced battery supply (FSP) indicator: it indicates the battery power supply is forced (battery protection is cancelled). It is lit when the battery is forced to supply power.2.3.2.2 Alarm The internal buzzer gives alarm when the battery is in undervoltage or has the wrong wiring. At the same time the battery-on indicator goes out. The battery undervoltage alarm will automatically stop when the line power becomes normal or the forced battery supply (FSP) button is pressed. When the line power is abnormal (overvoltage or undervoltage) or the output voltage is abnormal (overload or short circuit), the front panel power indicator blinks to give an alarm.Note: For details, see Overvoltage and Undervoltage Protection and Output Overload and Short Circuit Protection. 2.3.2.3 Operation ButtonsFront panel has two buttons: output voltage/current selection switch and power button. Back panel has three buttons: manual equalized/float charge switch, FSP forced battery supply button, BAT battery-on button. Manual equalized/float charge switch: when the switch is turned on, the module is in the mode of manual equalized charge; when the switch is turned off, the module is in the mode of float charge.FSP: forced battery supply button. BAT: battery-on button.2.3.2.4 AdjustTo the right of the output voltage/current selection switch on the front panel, there is an output voltage adjust knob. On the back panel, there are charge current setup switch (CC-ADJ) and equalized charge voltage adjust knob (HV-ADJ). OV-ADJ: output voltage adjust, turning clockwise is to increase. (See main performance specifications for its adjustment range)CC-ADJ: charge current setup switch. (See Charge Current Setup for the setup method)HV-ADJ: equalized charge voltage adjust, turning clockwise is to increase.2.3.2.5 Terminals There are two sets of wiring terminal on the back panel. One is for load output; the other is for battery connection.DC48V and red BATTERY wiring terminal (): positive pole shared between load and battery.DC48V and black wiring terminal (): 48V power supply terminal, wired to the negative pole of the load.Black BATTERY wiring terminal (): battery wiring terminal, wired to the negative pole of the battery.2.3.2.6 Power Socket The three-pole power socket is located on the back panel of the module. For the sake of safety, the earth wire shall have a good grounding when in use.2.3.2.7 Safety Device Safety devices are installed at the AC power input and the battery interface in order to achieve a safer operation of the system. Short circuit between the poles is very dangerous especially when there is no safety device at the battery interface.2.3.2.8 Load Current CalculationMaximum output current of the module: I0(max) (including charge current) At any time, I1+IcI0(max) Ic=-Ib0 I1 load current, Ic charge current, I0 output current of the module, Ib0 battery discharge current. Thus we have: I1I0(max)+Ib0 That means, when the module is connected to battery, the load current at certain time may exceed the modules max. output current, because the battery also supplies power to the load (Ic0). However, generally speaking, the average load current shall be lower than the modules max. output current. Thus the battery can get itself charged.2.3.3 Protection Function2.3.3.1 Overvoltage and Undervoltage ProtectionWhen the AC power overvoltage or undervoltage takes place, the power indicator will blink, the main loop of the module will automatically disconnect itself from the mains and monitor the voltage of the latter. When the AC voltage becomes normal, the module will automatically resume its operation.2.3.3.2 Output Overload and Short Circuit ProtectionThe overload protection mode used in the module is constant current limiting protection (see Fig. 3), which allows the module to operate constantly under current limiting condition. The advantage of this function is that, without any additional current sharing measures, a number of modules can be connected in parallel and their long-term and reliable operation can be achieved. When the output voltage becomes lower than 60% of the rated voltage (because of overload or short circuit) for a period longer than 10 seconds, the current limit point will drop a level lower than 10% of the nominal current (as shown in the dotted line in Fig. 3). At the same time, the power indicator will blink, giving an alarm. Here, if the load is disconnected, the module will automatically resume its normal operation.V0VoutI0(max)I0Fig. 3 power supply overload protection range2.3.3.3 Battery Undervoltage ProtectionWhen the battery is supplying power and battery undervoltage takes place, the battery-on indicator (BAT) will go out. The regulation module will enter the mode of battery undervoltage protection in order to protect the battery from damage. When the battery output voltage becomes normal, the module will automatically resume its operation and go on to charge the battery. When the forced battery supply button (FSP) is pressed, the forced battery supply (FSP) indicator will be lit.！WarningUsers must read very carefully the following instructions before they use the regulation module. The user is responsible for any losses or damages caused by his/her faulty operation. 3 Operation3.1 StartupConnect the power supply. Press the power button. The power indicator then blinks. After about 5 seconds, the module is started and the output voltage is set up. The power indicator turns from blinking to constant lighting.3.2 Battery ConnectionFirst make sure that the battery-on button (BAT) is in the OFF position. Connect the battery wiring. If there is no line power or the system is not in operation, DC48V red () and DC48V black wiring terminal () on the back panel shall be kept in open circuit, so that the buffer circuit is able to completely charge the output capacitor of the module. If the battery is correctly wired, press the battery-on (BAT) button. When the modules internal voltage and the external battery voltage reach a balance, the battery-on (BAT) indicator is lit.3.3 Forced Battery SupplyUnder the condition of low battery voltage, if the user does not want the load (carrier wave unit or program controlled exchange) to stop working because of temporary power failure, he can press the forced battery supply button (FSP). Then the module will cancel the battery protection. This condition shall not be kept long; otherwise the battery might be damaged.3.4 Equalized Charge Turn on the manual equalized/float charge switch, and the module will keep the original charge current and carry out equalized charge for the battery. Turn off the switch after the equalized charge is done, and the module will automatically resume the original charge voltage.3.5 Battery DisconnectionBefore pressing again the battery-on button (BAT) to disconnect the battery, the charge current setup switch shall be set at the min. level. If the mains power is connected or the module is not working, measures shall be taken to keep the load output terminals in open circuit, in order to prevent the relay contact from being burned by electric arc.3.6 Output Voltage Adjust With the output voltage adjust knob (OV ADJ) on the front panel, users can adjust the output voltage of the module (turning clockwise is to increase).3.7 Equalized Charge Voltage Adjust With the equalized charge voltage adjust knob (HV ADJ) on the back panel, users can adjust the equalized charge voltage of the module (turning clockwise is to increase).3.8 Charge Current SetupCC-ADJ charge current setup switch consists of four pairs of switch position, which are arranged in the low to high order. Their switch combination forms 16 switch levels. Given a max. charge current (Icm), the base value takes 25%. From left to right, the current that each switch position controls is respectively 5%, 10%, 20% and 40%. Users can combine the switch positions according to their own needs. The adjustment range is 25%100%Icm.3.9 Parallel Operation When modules are in parallel operation, current sharing can be automatically realized with the bus interface connections between the modules. In case of module faults, the parallel system can automatically isolate the faulty module. Each output voltage adjust knob (OV-ADJ) can independent adjust the output voltage in the module it belongs to. For a system that integrates N regulation modules, the adjustment range of each module is 1/N; each equalized charge voltage adjust knob (HV-ADJ) can adjust the charge voltage of the whole system, but the system will only adopt the highest voltage setup among the modules. Any manual equalized charge switch alone in the modules can turn the whole system into the state of equalized charge.When in parallel operation, the BATTERY (-) terminals of the modules will lose their former function, and will be connected under parallel operation rules to form a system. See fig. 4 (b) for the detailed wiring method.regulation module DC48VDC48V BATTERYelectric appliances battery(a) wiring diagram for independent module operationBus 1Module I DC48V DC48V BATTERY Fu1batteryFu2Bus线Module IIelectric appl