科士达后备电源有哪些使用注意事项

科士达后备式UPS电源怎么使用

科士达后备式UPS电源的使用方法是将科士达后备式UPS电源的机身带的三孔插头插到市电电源的插排上，打开科士达后备式UPS电源开关，让科士达后备式UPS电源正常工作后，再将电脑主机和显示器等的电源线插头插到科士达后备式UPS电源机身后面的插孔内 ，逐一开机即可。科士达后备式UPS电源不宜一直处于满载或轻载的状态下运行，一般选取额定容量的50%—80%。在选购时，请参考前面的公布购买。
 

科士达后备式UPS电源的使用注意事项

1、开机前，要确认输入市电接线的剂型正确，科士达后备式UPS电源系统对电源负极的要求是非常严格的，稍有不慎，后果不堪设想。

2、市电中断后，科士达后备式UPS电源由电池供电而自动关机后，不要再用科士达后备式UPS电源电池供电，过量放电，只会让科士达后备式UPS电源的电池寿命减少迅速。

3、除非科士达后备式UPS电源本身已经注明，否则不要外接长效电池，这样做会令ips因功率加大而出现科士达后备式UPS电源故障。

充分注意负载总容量不能大于科士达后备式UPS电源的额定功率。负载总容量过大，就会连累科士达后备式UPS电源中的电池超载运行，时间一长，就会令电池损毁，甚至损毁科士达后备式UPS电源。

4、科士达后备式UPS电源比较适合于带电容性负载，而不适合带点感性负载、半波负载及冲击性负载，输出为方波的科士达后备式UPS电源不能带电感性负载。

5、不要频繁地关闭和开启科士达后备式UPS电源。一般要在关闭ips电源6秒钟后才能再次开启，否则科士达后备式UPS电源可能处于“启动失败”的状态，即科士达后备式UPS电源处于既无市电输出，又无逆变器输出的状态。

通过以上的介绍，相信大家已经知道了科士达后备式UPS电源怎么使用。在使用科士达后备式UPS电源的时候，就必须要遵守上述注意事项。

How to Use the Backup UPS Power Supply of Costa
The way to use the backup UPS power supply is to plug the three-hole plug of the backup UPS power supply body into the outlet of the municipal power supply, open the backup UPS power switch, let the backup UPS power supply work properly, and then insert the power cord plug of the computer mainframe and the display into the socket behind the backup UPS power supply fuselage, one by one, to open the socket behind the backup UPS power supply fuselage. Machine can. Costa backup UPS power supply is not suitable for full load or light load operation. Generally, 50% to 80% of the rated capacity is selected. When choosing a purchase, please refer to the previous publication purchase.


Cautions for the Use of Backup UPS Power Supply in Costa
1. Before startup, it is necessary to confirm the correct dosage form of the input municipal electrical wiring. The requirement of the backup UPS power supply system for the negative pole of the power supply is very strict, slightly inadvertent, and the consequences are unimaginable.
2. After power interruption, when the backup UPS power supply is powered by batteries and shut down automatically, don't use the backup UPS battery power supply. Excessive discharge will only reduce the battery life of the backup UPS power supply.
3. Do not add long-term batteries unless the backup UPS power supply of Kosta has been specified. This will cause the backup UPS power failure of Kosta due to the increase of power.
Full attention should be paid to the fact that the total load capacity should not be greater than the rated power of the Kosta backup UPS power supply. If the total load capacity is too large, the battery in the backup UPS power supply will be overloaded. If the time is too long, the battery will be damaged or even the backup UPS power supply will be damaged.
4. Costa backup UPS power supply is more suitable for capacitive load, but not for point inductive load, half-wave load and impact load. Costa backup UPS power supply with square wave output can not carry inductive load.
5. Don't turn off and open the backup UPS power frequently. Usually, it can not be turned on again until 6 seconds after turning off the IPS power supply. Otherwise, the backup UPS power supply of Kosta may be in the state of "starting failure". That is to say, the backup UPS power supply of Kosta is in the state of neither market power output nor inverter output.
Through the above introduction, I believe that you already know how to use the backup UPS power supply. When using the backup UPS power supply of Costa, the precautions mentioned above must be followed.

科士达后备式UPS电源，又称非在线式UPS，又称离线式(off line)。新标准IEC62040-3规定为被动后备式

体积小，效率高，价格低廉，运行费用低。由于在正常情况下逆变器处于非工作状态，电网电能直接供给负载，因此后备UPS的电能转换效率很高，蓄电池的使用寿命都是很长。
 

这种科士达后备式UPS电源最大的长处是结构简单，成本较低，噪音小。科士达后备式UPS电源特点是逆变器高线，因而逆变形平时处在备用状态。并且因为容量小，切换开关大多选用疾速切换的继电器(2—5mg)而没有选用更高速切换的静态开关，因而，切换时间相对长一些。当市电正常时，科士达后备式UPS电源将市电直接导通到负载端，也就没有整流、滤波等功能，易受电网电压及谐波电流的影响。只有当市电输入中止或供电质量超出UPS正常输入范围时，才起动逆变器切换到电池放电状态，科士达后备式UPS电源输出准方波。

科士达后备式UPS电源缺点

负载同上线供电系统没有真正隔离;较长的转换时间，缺少真正的静态开关，这意味着把负载转换到逆变器所需要的时间相对较长。虽然某些应用场合下这种转换时间是可以接受的(例如单独的计算机等)，但这种性能是不能满足大型或复杂的敏感型负载的要求(例如大型计算机中心，电话交换机等);输出电压不能调整;输出频率取决于交流输入电源的频率，也不能调整。

科士达后备式UPS电源生产厂生产的UPS插座，就是用不间断电源供电的插座，一般在宾馆(比如如家快捷酒店)里面比较常见，意思就是说假如忽然停电，科士达后备式UPS电源插座还可以继续供电，能保护一下电脑等不能忽然断电的设备。

二、科士达后备式UPS电源怎么用

1、新买回来的不间断电源ups本身就有一个插头的，这个是连接市电的插头，直接与家里或公司市电连接就行。

2、我们来看看科士达后备式UPS电源的背面：

首先我们看到这款科士达后备式UPS电源背后有三个电源插座，我们一一来介绍，左边的两个是UPS输出口，也就是输出电源连接外部设备用的，比如我这里是一个连接电脑主机一个连接电脑显示器。

3、这两个插座不单单是直接连接设备，你还可以连接插排，再把设备(电脑或其它电器)连接到插排上。

虽然可以连接插排再连接多点设备，但是也要看你的科士达后备式UPS电源的功率哦，超负荷连接也是不行的，也起不了保护作用了。

4、科士达后备式UPS电源有个保险丝，超负荷工作时可以起到保护科士达后备式UPS电源，UPS不能正常工作时看看是不是保险丝烧坏了。

5、把后面的插座都接上线上，再来看看科士达后备式UPS电源前面，有三个指示灯，分别是市电、电池、故障。

市电：就是直接连接公司的电源，指示灯常亮就是正常连接市电。

电池：就是当市电断电时，电池指示灯亮并闪烁，发出嘟嘟警报声，此时是使用科士达后备式UPS电源电池的电，一台电脑一般可以使用1个小时左右，这是看电池的大小和电脑工作状态等因素决定的。

故障：顾名思义就是科士达后备式UPS电源不能正常工作的指示了。

6、以上连接好设备后，注意到科士达后备式UPS电源前面有个按钮，一定要按下去才能起作用，否则是无法正常工作的。

The biggest advantage of this backup UPS power supply is its simple structure, low cost and low noise. Corstal backup UPS power supply is characterized by high-voltage inverters, so the inverse deformation is usually in the standby state. Because of its small capacity, switching switches mostly use fast switching relays (2-5mg) instead of static switches with higher switching speed, so the switching time is relatively longer. When the municipal power is normal, the backup UPS power supply of Costa will direct the municipal power to the load end, so it has no rectification, filtering and other functions, and is vulnerable to the influence of grid voltage and harmonic current. Only when the local power input is interrupted or the power supply quality exceeds the normal input range of UPS, can the starting inverter be switched to the battery discharge state, and the Quasi-Square Wave is output from the backup UPS power supply of Kosta.
Disadvantage of Backup UPS Power Supply in Costa
There is no real isolation between the load and the on-line power supply system; the longer the conversion time, the lack of real static switches, which means that it takes a relatively long time to convert the load to the inverter. Although this conversion time is acceptable in some applications (e.g. individual computers), this performance can not meet the requirements of large or complex sensitive loads (e.g. large computer centers, telephone switches, etc.); the output voltage can not be adjusted; the output frequency depends on the frequency of the AC input power supply and can not be adjusted.

The UPS socket produced by Keshida backup UPS power supply factory is a socket powered by uninterruptible power supply. It is more common in hotels (such as Home Express Hotel). That is to say, if the power is suddenly cut off, Keshida backup UPS power socket can continue to supply power, which can protect the computer and other equipment that can not be cut off suddenly.
II. How to Use the Backup UPS Power Supply of Costa
1. The newly purchased UPS itself has a plug. This plug connects to the municipal power supply directly to the home or the company's municipal power supply.
2. Let's look at the back of Kosta backup UPS power supply.
First of all, we can see that there are three power outlets behind this backup UPS power supply. Let's introduce them one by one. The two outlets on the left are UPS output ports, that is, the output power is used to connect external devices. For example, I am here to connect a computer host and a computer monitor.
3. These two sockets are not only directly connected to the device, you can also connect the socket, and then connect the device (computer or other electrical appliances) to the socket.
Although plug-in and multi-point devices can be connected, but also depend on the power of your Kosta backup UPS power supply, oh, overload connection is not feasible, nor can it play a protective role.
4. The backup UPS power supply of Kosta has a fuse, which can protect the backup UPS power supply of Kosta when it is overloaded. If UPS can't work properly, see if the fuse is burnt out.
5. Connect all the sockets in the back to the line. Look at the front of the backup UPS power supply of Kosta. There are three indicators, namely, municipal power, battery and malfunction.
City power: It is directly connected to the company's power supply, and the indicator light is always on to connect the city power normally.
Battery: When the city power is cut off, the battery indicator lights on and flickers, and emits a beeping alarm sound. At this time, it is the power using the backup UPS battery of Kosta. A computer can generally use about one hour, which depends on the size of the battery and the working state of the computer and other factors.
Fault: As the name implies, it is the indication that the backup UPS power supply of Costa can not work properly.
6. After connecting the above equipment, we noticed that there is a button in front of the backup UPS power supply of Kosta. It must be pressed to work, otherwise it will not work properly.

三、科士达后备式UPS电源插座和普通的插座有什么区别

1、科士达后备式UPS电源的插座与普通插座没有本质上的差别。

2、但不是什么电器都可以插在科士达后备式UPS电源插座上，家里的风扇最好不要插在UPS插座上。

另外，还有看科士达后备式UPS电源的容量，不要在UPS插座上插太多电器。

不间断电源插座一般存在于酒店比较普遍，因为当我们离开房间要把卡拔出来时，再也不怕没有电给我们心爱的相机什么的充电了。

备用电源的接线方式有5种情况

1、放射式

2、干线式

3、链式

4、环式

5、双端电源供电式

今天小编就跟大家聊聊科士达后备式UPS电源怎么接线，与放射式接线方式。

What's the difference between the backup UPS power socket and the ordinary socket in Costa Rica?

1. There is no essential difference between the socket of the backup UPS power supply and the ordinary socket.
2. But not all electrical appliances can be plugged into the back-up UPS socket in Costa Rica. It's better not to plug the fan in the UPS socket at home.
In addition, there is also the capacity of the back-up UPS power supply, do not plug too many appliances into the UPS socket.
Uninterruptible power outlets are common in hotels, because when we leave the room to pull out the card, we are no longer afraid that there is no electricity to charge our beloved camera or something.
There are five types of connection modes for standby power supply
1. Radiation
2. Trunk line type
3, chain type
4, ring type
5. Dual-ended power supply
Today, Xiaobian will talk with you about how to connect the backup UPS power supply and the radiation mode.

放射式有3种方案接线分别是，单回路放射式、双回路放射式、树枝式。(如图下)

科士达后备式UPS电源特点：

放射式接线的线路之间互不影响，供电可靠性较高，便于装设自动装置，保护装置也比较简单，但是其高压开关设备用得较多，且每台断路器须装设一个高压开关柜，从而使投资增加。而且在发生故障或检修时，该线路所供电的负荷都要停电。

1、变压器容量过小，负载超过变压器容量过多，引起电压下降;

2、电线截面积过小，负载超过电线额定的电流过多，温度高引起电压下降;

3、导线太长，截面积不够，电压损失过多引起电压下降;

4、三相电流不平衡、电线、开关、接点连接不好等。

那么造成电压低怎么办呢?

推荐使用稳压器，因为稳压器具有输出电压稳定的设备。稳压器由调压电路、控制电路、及伺服电机等组成。当输入电压或负载变化时，控制电路进行取样、比较、放大，然后驱动伺服电机转动，使调压器碳刷的位置改变，通过自动调整线圈匝数比，从而保持输出电压的稳定。

当然这要根据使用设备的功率来决定使用多少功率的稳压器，如果是想要控制家庭整个电源的稳压器，建议咨询下专业从事稳压器行业的人员，(我是小白，对这个不懂哦!)如果是因为某个设备对电压要求比较高，就可以买一台稳压器。

参考一下公式进行计算

s=p*kX/cosφ

变压器的容量s=设备额定功率p×变压器负载率kx/功率因数cosφ=(300×kX)×0.80

这个就是你的变压器容量。

工频科士达UPS电源是UPS行业里长期存在的一款电源，广泛用于通信行业计费中心、通信基站、银行营业网点、ATM自动取款机及证券、交通、电力、工业等各行业网络办公环境。而目前最新的工频机采用了全球最先进的DSP数字化控制技术，具有语音报警功能、高速微处理器(MCU)、可编程逻辑器件(CPLD)、第六代低损耗大功率IGBT和静态开关;实现了UPS电源容量大、可靠性高、性能稳定。
 Costa backup UPS power supply features:
Radial wiring lines have no influence on each other, high reliability of power supply, easy to install automatic devices and simple protection devices, but their high-voltage switchgear is used more, and each circuit breaker needs to install a high-voltage switchgear, thus increasing investment. And in the event of failure or overhaul, the load supplied by the line will be cut off.
1. The transformer capacity is too small and the load exceeds the transformer capacity too much, which leads to voltage drop.
2. The cross-sectional area of the wire is too small, the load exceeds the rated current of the wire too much, and the high temperature causes the voltage to drop.
3. The conductor is too long, the section area is insufficient, and the voltage drop is caused by too much voltage loss.

4. Three-phase current unbalance, wire, switch, poor connection and so on.
So what about low voltage?
It is recommended to use a regulator because it has a device with stable output voltage. The regulator is composed of voltage regulating circuit, control circuit and servo motor. When the input voltage or load changes, the control circuit samples, compares and amplifies, then drives the servo motor to rotate, so that the position of the regulator carbon brush can be changed. By automatically adjusting the coil turn ratio, the output voltage can be maintained stable.
Of course, it depends on the power of the equipment to decide how much power to use. If you want to control the voltage stabilizer of the whole power supply in your home, you should consult someone who specializes in the voltage regulator industry. (I'm Xiaobai, I don't know about this!) If it's because of the high voltage requirement of a certain equipment, you can buy a voltage regulator.
Refer to the formula for calculation.
S=p*kX/cos Phi
Transformer capacity s = equipment rated power p * transformer load rate KX / power factor cos_ phi = 300 * kX * 0.80
This is your transformer capacity.
Power Frequency Corstal UPS power supply is a long-standing power supply in the UPS industry. It is widely used in billing centers, communication base stations, bank outlets, ATM automated teller machines, securities, transportation, power, industry and other industries network office environment. At present, the latest industrial frequency machine adopts the most advanced digital control technology of DSP in the world, which has voice alarm function, high-speed microprocessor (MCU), programmable logic device (CPLD), the sixth generation low-loss high-power IGBT and static switch, and realizes the power supply of UPS with large capacity, high reliability and stable performance.

工频科士达UPS电源有什么特点

工频机单进单出科士达UPS电源突破了UPS行业的技术瓶颈，以先进的数字电路系统替代了传统的模拟电路，实现了非凡的创新。在数字电路模式下，高速微控制器和可编程逻辑器件对电路控制、参数设定和运行管理更加完美，自检和自侦测功能更加强大。全程采样技术不仅有利于对电路板上的所有独立电路连接进行自检和故障分析，更能经数码变换为极度纯正和稳定的正弦波电压，确保系统超稳定运行。

工频科士达UPS电源是UPS行业里长期存在的一款电源，据诚稳UPS电源生产厂了解，这种UPS广泛用于通信行业计费中心、通信基站、银行营业网点、ATM自动取款机及证券、交通、电力、工业等各行业网络办公环境。

看了上面的介绍，想必大家已经知道了什么是工频UPS不间断电源。现在科士达UPS电源已经被广泛应用于通信、证券和工业等领域。

一、停电时，逆变不工作

分析与维修:根据故障现象分析得知，该故障是因蓄电池电压太低引起。打开机盖，将其取出充电，故障排除。用一段时间后故障依旧，故怀疑充电回路有故障。用万用表电压档检测充电回路中的三端可调稳压块LM317，其输入电压正常，但输出端电压仅为14.3v，重新调整均无反应。故判断LM317损坏。更换之，重新启动，拆掉蓄电池，将充电电压调至27v时，故障随即排除。

二、科士达UPS电源逆变器功率级一对功放晶体管损坏，更换同型号晶体管后，运行一段时间又烧坏的原因是电流过大，而引起电流过大的原因有

1、过流保护失效。当逆变器输出发生过电流时，过流保护电路不起作用;

2、脉宽调制(PWM)组件故障，输出的两路互补波形不对称，一个导通时间长，而另一个导通时间短，使两臂工作不平衡，甚至两臂同时导通，造成两管损坏;

3、功率管参数相差较大，此时即使输入对称波形，输出也会不对称，该波形经输出变压器，造成偏磁，即磁通不平衡，积累下去导致变压器饱和而电流骤增，烧坏功率管，而一只烧坏，另一只也随之烧坏。

三、市电供电正常时，工作正常;当切断市电时，无220v电压输出且伴有长鸣报警声

分析与维修:根据故障现象，仔细检查蓄电池电压为26v，正常;两只逆变器大功率输出管和相应的驱动器也正常。估计为蓄电池电压检测电路有问题。正常情况下，第⑥脚电压为参考电压，维持在1.2v左右;当蓄电池为正常值26v时，计算可知:⑦脚电压约为1.4v，因此①脚电压为12v高电平。现将UPS置于无市电工作状态下，测量IC1的脚①、⑥、⑦，其电压值分别为0v、1.2v、0v，据此可知第⑦脚电压偏低。由此推断R3、R4分压有问题。分别测量R3、R4的阻值，发现R3已经断路，更换之，故障排除。

What are the characteristics of power frequency Corstal UPS power supply
The single-in and single-out UPS power supply of power frequency machine breaks through the technical bottleneck of UPS industry, replacing traditional analog circuit with advanced digital circuit system, and realizes extraordinary innovation. In the digital circuit mode, high-speed microcontrollers and programmable logic devices are more perfect for circuit control, parameter setting and operation management, and more powerful for self-detection and self-detection. Full-range sampling technology is not only conducive to self-detection and fault analysis of all independent circuit connections on the circuit board, but also can be digitally converted to extremely pure and stable sinusoidal voltage to ensure ultra-stable operation of the system.
Power Frequency Corstal UPS power supply is a long-standing power supply in UPS industry. According to Chengwen UPS power supply manufacturer, this UPS is widely used in billing center, communication base station, bank business outlet, ATM ATM and network office environment of securities, transportation, power, industry and other industries.
Looking at the above introduction, you must have known what is UPS power supply. Currently, Corstal UPS power supply has been widely used in communications, securities and industrial fields.
1. Inverter does not work when power failure occurs.
Analysis and maintenance: According to the analysis of fault phenomenon, it is known that the fault is caused by too low battery voltage. Open the cover, take it out and charge, troubleshooting. After a period of time, the fault still exists, so the charging circuit is suspected to be faulty. The three-terminal adjustable voltage regulator LM317 in the charging circuit is detected by the multimeter voltage gap. Its input voltage is normal, but the output voltage is only 14.3v. There is no response to the readjustment. Therefore, it is judged that LM317 is damaged. Replacement, restart, remove the battery, and adjust the charging voltage to 27v, the fault will be eliminated immediately.
2. The reason why a pair of power amplifier transistors in the power stage of Kosta UPS power supply inverter are damaged after replacing the same type of transistors and burning out after running for a period of time is that the current is too large, and the reasons for the excessive current are as follows:
1. Overcurrent protection failure. When the overcurrent occurs in the output of the inverter, the overcurrent protection circuit does not work.
2. Pulse Width Modulation (PWM) module failure, the output of two complementary waveforms asymmetry, one conduction time is long, while the other conduction time is short, so that the two arms work imbalance, or even two arms simultaneously conduction, resulting in two tube damage;
3. The parameters of the power transistor are quite different, even if the input symmetrical waveform is input, the output will be asymmetrical. The waveform through the output transformer will cause magnetic bias, that is, unbalanced magnetic flux. The accumulation of the waveform will lead to the saturation of the transformer and the sudden increase of the current, which will burn the power transistor, and one will burn out, and the other will also burn out.
3. When the power supply is normal, the work is normal; when the power supply is cut off, there is no 220V voltage output and accompanied by long-rang alarm sound.
Analysis and maintenance: According to the fault phenomenon, carefully check the battery voltage is 26v, normal; two inverters high-power output tube and the corresponding driver are normal. It is estimated that there is a problem with the battery voltage detection circuit. Normally, the foot voltage is the reference voltage, which is maintained at about 1.2V. When the battery is the normal value of 26v, the calculation shows that the foot voltage is about 1.4v, so the foot voltage is 12V high.  Now the UPS is placed in the non-electricity working state, and the feet of IC 1 are measured. The voltage values of feet 1, _and_are 0 v, 1.2 V and 0 v, respectively. According to this, the voltage of feet_is on the low side. It can be inferred that the partial pressure of R3 and R4 is problematic. The resistance values of R3 and R4 are measured respectively, and it is found that R3 has been disconnected, replaced and troubleshooting.

四、UPS开机后，面板上无任何显示，UPS不工作

故障分析：从故障现象判断，其故障在市电输入、蓄电池及市电检测部分及蓄电池电压检测回路：

1、检查市电输入保险丝是否烧毁;

2、若市电输入保险丝完好，检查蓄电池保险是否烧毁，因为某些UPS当自检不到蓄电池电压时，会将科士达UPS电源的所有输出及显示关闭;

3、若蓄电池保险完好，检查市电检测电路工作是否正常，若市电检测电路工作不正常且UPS不具备无市电启动功能时，UPS同样会关闭所有输出及显示。

4、若市检测电路工作正常，再检查蓄电池电压检测电路是否正常。

五、市电供电正常时，开机，逆变器工作指示灯闪烁，蜂鸣器间断鸣叫

分析与维修:我们知道，科士达UPS电源 500VA不间断电源是由市电供电还是逆变器供电，取决于IC5的两个与非门组件组成的RS触发器。在市电供电时，RS触发器VH=“1”，VG=“0”，复位端R(VF)为高电平，置位端S(VN)为正向脉冲信号VN，测得VH为低电平，VG为高电平，再测量复位端R(VF)为低电平，均错;置位端S(VN)为一串正向脉冲，正确;IC3第⑧脚为高电平，正确。测市电检测电压V1为0v，即没有市电检测电压，测变压器T2的副边绕组已断路。更换变压器T2，工作正常。

六、一台后备UPS有市电时工作正常，无市电时逆变器有输出，但输出电压偏低，同时变压器发出较大的噪音

故障分析：逆变器有输出说明末级驱动电路基本正常，变压器有噪音说明推挽电路的两臂工作不对称，检测步骤如下：

1、检查功率是否正常;

2、若功率正常，再检查脉宽输出电路输出信号是否正常;

3、若脉宽输出电路输出正常，再检查驱动电路的输出是否正常。

七、在市电供电正常时开启UPS，逆变器工作指示灯闪烁，蜂鸣器发出间断叫声，UPS只能工作在逆变状态，不能转换到市电工作状态

故障分析：不能进行逆变供电向市电供电转换，说明逆变供电向市电供电转换部分出现了故障，要重点检测：

1、市电输入保险丝是否损坏;

2、若市电输入保险丝完好，检查市电整流滤波电路输出是否正常;

3、若市电整流滤波电路输出正常，检查市电检测电路是否正常;

4、若市电检测电路正常，再检查逆变供电向市电供电转换控制输出是否正常。

八、科士达UPS电源当负载接近满载时，市电供电正常，而蓄电池供电时蓄电池保险丝熔断

故障分析：蓄电池保险丝熔断，说明蓄电池供电流过大，检测步骤如下：

1、逆变器是否击穿;

2、蓄电池电压是否过低;

3、若蓄电池电压过低，再检测蓄电池充电电路是否正常;

4、若蓄电池充电电路正常，再检测蓄电池电压检测电路工作是否正常。

九、 科士达UPS电源只能由市电供电而不能转为逆变供电

故障分析：不能进行市电向逆变供电转换，说明市电向逆变供电转换部分出现故障，要重点检测：

1、蓄电池电压是否过低，蓄电池保险丝是否完好;

2、若蓄电池部分正常，检查蓄电池电压检测电路是否正常;

3、若蓄电池电压检测电路正常，再检查市电向逆变供电转换控制输出是否正常。

UPS does not work because there is no display on the panel after booting UPS.
Fault analysis: Judging from the fault phenomena, the faults are in the municipal power input, the battery and the municipal power detection part and the battery voltage detection circuit:
1. Check whether the input fuse of municipal electricity is burnt down;
2. If the city power input fuse is in good condition, check whether the battery insurance is burnt, because some UPS will turn off all the output and display of the Corstal UPS power supply when the battery voltage can not be self-checked.
3. If the battery is in good condition, check whether the municipal electricity detection circuit is working properly. If the municipal electricity detection circuit is not working properly and the UPS does not have the non-municipal electricity start-up function, the UPS will also turn off all output and display.
4. If the city detection circuit works normally, then check the battery voltage detection circuit is normal.
5. When the power supply of municipal electric power is normal, the power is turned on, the working indicator of the inverter flashes and the buzzer interrupts.

Analysis and Maintenance: We know that COSTAR UPS 500VA uninterruptible power supply is powered by municipal power supply or inverters, depending on the two non-gate components of IC5 RS trigger. In the power supply of municipal power, RS flip-flop VH= "1", "VG="0","reset R (VF) is high level, reset S (VN) is positive pulse signal VN, measured VH is low level, VG is high level, then measured reset R (VF) is low level, all errors; reset S (VN) is a series of forward pulses, correct; IC3 foot_is high level, correct. The test voltage V1 is 0v, that is, there is no test voltage, and the secondary winding of the test transformer T2 has been broken. Change transformer T2, working normally.
6. A backup UPS operates normally when it has market power, and the inverter has output when it has no market power, but the output voltage is low, and the transformer emits large noise at the same time.
Fault analysis: The output of the inverter indicates that the final drive circuit is basically normal, and the noise of the transformer indicates that the two arms of the push-pull circuit work asymmetrically. The detection steps are as follows:
1. Check whether the power is normal.
2. If the power is normal, then check whether the output signal of the pulse width output circuit is normal.
3. If the output of the pulse width output circuit is normal, then check whether the output of the driving circuit is normal.
7. Turn on UPS when the power supply of municipal power is normal. The indicator lights of the inverters flicker and the buzzer makes intermittent calls. UPS can only work in the inverted state, but can not be converted to the working state of municipal power.
Fault analysis: It is impossible to convert the inverted power supply to the municipal power supply. It shows that there is a fault in the part of the conversion from the inverted power supply to the municipal power supply.
1. Whether the input fuse of municipal power is damaged or not;
2. If the input fuse is in good condition, check whether the output of rectifier filter circuit is normal.
3. If the output of rectifier filter circuit is normal, check whether the detection circuit is normal.
4. If the city electricity detection circuit is normal, then check whether the control output of converter power supply to city power supply is normal.
8. Coastal UPS power supply. When the load is close to full load, the city power supply is normal, while the battery fuse is fused when the battery is supplied.
Fault analysis: The fuse of the battery fuse is fused, which indicates that the supply current of the battery is too large. The detection steps are as follows:
1. Whether the inverter breaks down or not;
2. Is the battery voltage too low?
3. If the battery voltage is too low, then check whether the battery charging circuit is normal.
4. If the battery charging circuit is normal, then check whether the battery voltage detection circuit is working properly.
9. Costa UPS power supply can only be supplied by municipal power supply, but can not be converted to inverted power supply.
Fault analysis: It is impossible to carry out the conversion from municipal power supply to inverted power supply, which indicates that there is a fault in the conversion part of municipal power supply to inverted power supply.
1. Is the battery voltage too low and the battery fuse intact?
2. If the battery part is normal, check whether the battery voltage detection circuit is normal.
3. If the battery voltage detection circuit is normal, then check whether the control output of power conversion from municipal electricity to inverters is normal.

十、 市电稳压的检测

市电电压的高低取决于继电器S3～S8的吸合状态。先用万用表逐一检测，发现继电器S3的线圈已烧断，故S3不吸合，使得220V市电电压完全加在T3的第3、4根抽头间，从而导致输出电压偏高。更换T3，开机运行，故障排除。

十一、 高压保护电路的检测

逐一仔细查看高压保护电路的每一元器件，均无故障。适当调整电位器RP8，当下调至某一数值(减少)时，高压保护电路突然正常起动。由此可知，电源高压保护电路的电压偏高，须重新调整。将电源的输入端接在交流调压器上，输出端接在电压表上。然后将调压器的电压值慢慢地从175v升至250v，并记录下此过程中输出电压最大值是230v。当输出电压是235v时，沿逆时针方向缓慢调整电位器RP8，直至高压保护电路刚一启动即可。注意，当高压保护电路出现故障，输出电压为220v±5%时，是无法仅凭肉眼观察到的。因此在使用时要定期检查高压保护电路是否正常。

十二、在接入市电的情况下，每次打开UPS，便听到继电器反复的动作声，UPS面板电池电压过低指示灯长亮且蜂鸣器长鸣

根据上述故障现象可以判断：该故障是由蓄电池电压过低，从而导致UPS启动不成功而造成的。拆下蓄电池，先进行均衡充电(所有蓄电池并联进行充电)，若仍不成功，则只有更换蓄电池。

十三、市电工作时，电源变压器噪声大

分析与维修:根据故障现象可知，当变压器的负载过重，或工作状态处于不平衡、不稳定时，就有可能发出异常的噪音。而我们知道，当与变压器相连的电路中有元器件损坏，或者有些连线接触不良，就有可能使负载过重。检查变压器的次级并未发现碰线短路、匝间短路、元器件损坏故障。用酒精棉球轻轻擦洗干净，再将各连接插头、插座拔掉，重新插好后，变压器的噪声消失，UPS电源工作正常。推测故障原因可能是电路板灰尘太多，某个连接插头不良引起变压器负载过重所致。

十四、蓄电池电压偏低，但开机充电十多小时，蓄电池电压仍充不上去

故障分析：从现象判断为蓄电池或充电电路故障，可按以下步骤检查：

1、检查充电电路输入输出电压是否正常;

2、若充电电路输入正常，输出不正常，断开蓄电池再测，若仍不正常则为充电电路故障;

3、若断开蓄电池后充电电路输入、输出均正常，则说明蓄电池已因长期未充电、过放或已到寿命期等原因而损坏。

十五、当市电中断时，逆变器不工作，红色指示灯长亮

分析与维修:根据故障现象可知，该故障是因电池电压太低引起。打开机盖，测得电池两端电压只有16.8v，加上市电后，电池两端电压不变，说明故障发生在充电电路上。 用万用表测得C21两端直流电压正常，说明故障发生在滤波电路之后。当测量MG317T输出脚时，发现输出电压只有110v，查输出负载均正常，调整VR3输出电压不变化，此时说明U8已损坏。用同型号的MG317T更换U8，断开电池，调整VR3，使得U8输出电压稳定在28v左右。开机试运行，故障排除。
 

十六、有市电时科士达UPS电源输出正常，而无市电时蜂鸣器长鸣，无输出

故障分析：从现象判断为蓄电池和逆变器部分故障，可按以下程序检查：

1、检查蓄电池电压，看蓄电池是否充电不足，若蓄电池充电不足，则要检查是蓄电池本身的故障还是充电电路故障。

2、若蓄电池工作电压正常，检查逆变器驱动电路工作是否正常，若驱动电路输出正常，说明逆变器损坏。

3、若逆变器驱动电路工作不正常，则检查波形产生电路有无PWM控制信号输出，若有控制信号输出，说明故障在逆变器驱动电路。

4、若波形产生电路无PWM控制信号输出，则检查其输出是否因保护电路工作而封锁，若有则查明保护原因;

5、若保护电路没有工作且工作电压正常，而波形产生电路无PWM波形输出则说明波形产生电路损坏。上述排故顺序也可倒过来进行，有时能更快发现故障。

十七、当市电中断时，逆变器不工作，蜂鸣器长鸣

分析与维修:根据故障现象，蜂鸣器长鸣，说明该稳压电源的转换控制电路正常，逆变器不逆变是因保护电路动作所致。用万用表检测电池电压正常，说明故障出在逆变回路电路。该机逆变回路由脉宽调制器U1(SG3524)、取样变压器T2、推动管Q5与Q6、逆变器Q17与Q18等组成。首先测量脉宽调制器U1(SG3524)的⑩脚，看是否被锁定(锁定时为高电平)，接着测量逆变管Q17、Q18静态工作时对地的阻值。正常时依数据可知:当黑笔接地时，Q17、Q18的e、b、c对地阻值分别为3.2kΩ、3.8kΩ、0kΩ;当红笔接地时，此阻值分别为5.6kΩ、6.5kΩ、0Ω。用万用表测量Q17、Q18的e、b、c对地阻值均只有100Ω。此时发现逆变管Q17与Q18、推动管Q5与Q6均已烧坏。更换之，故障排除。

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