无论是什么设备在出厂前都是要按照相关的设计要求进行检测的，只有设备在符合各项标准之后才能出厂。MNS低压抽屉柜也是如此，那它的成功出厂需要经过哪些检验呢?下面
MNS低压抽屉柜厂家为大家介绍MNS低压抽屉柜的出厂检测四大步，感兴趣的朋友可以了解一下。
No matter what equipment is delivered, it shall be tested according to relevant design requirements, and it can only be delivered after it meets various standards. The same is true for MNS low-voltage drawer cabinet. What tests are required for its successful delivery? The manufacturer of MNS low-voltage drawer cabinet will introduce the four major steps of factory inspection of MNS low-voltage drawer cabinet for you. Interested friends can learn about it.
一、MNS低压抽屉柜的测试准备
1、 Test preparation of MNS low-voltage drawer cabinet
1、MNS低压抽屉柜或IO柜上电前一定要切除全部电源开关。
1. Before powering on MNS low-voltage drawer cabinet or IO cabinet, all power switches must be cut off.
2、MNS或DCS卡件与外部的连接一定要全部切断。
2. All connections between MNS or DCS cards and the outside must be cut off.
3、检查各电源端子导线及连接装置压接是否紧密，电源线虚接会导致仪表或电器烧毁。
3. Check whether the power terminal wires and connecting devices are tightly crimped. False connection of the power line will cause the instrument or electrical appliance to burn.
4、检查各种仪表、电器硬件设置与设计要求是否一致;检查端子板电源设置、回路设置与设计要求是否一致。
4. Check whether the hardware settings of various instruments and electrical appliances are consistent with the design requirements; Check whether the power supply and circuit settings of the terminal board are consistent with the design requirements.
二、MNS低压抽屉柜的上电检测
2、 Power-on detection of MNS low-voltage drawer cabinet
1、原则：从总电源开始逐个分级送电，送电前检查开关输入侧电压是否正常以及开关输出侧阻抗是否正常，输出侧电阻较小时应分析原因进行确认。柜内仪表不允许一次性多个仪表同时送电，一块仪表上电正常后再投入下一块。
1. Principle: start from the main power supply to deliver power one by one. Before power transmission, check whether the voltage at the input side of the switch is normal and whether the impedance at the output side of the switch is normal. If the resistance at the output side is small, analyze the reason for confirmation. Multiple instruments in the cabinet are not allowed to be powered on at the same time. One instrument can be put into operation after it is powered on normally.
2、MNS低压抽屉柜厂家提醒大家在总电源合闸前应先确认交流电压等级是否符合要求。带有两路交流电源进线且不带自动切换时应严格注意避免并接，带自动切换时应空载测试双电源自动切换装置是否正常动作。
2. The manufacturer of MNS low-voltage drawer cabinet reminded everyone to confirm whether the AC voltage level meets the requirements before closing the main power supply. When there are two incoming lines of AC power supply and there is no automatic switching, strict attention shall be paid to avoid parallel connection. When there is automatic switching, no-load test shall be conducted to check whether the automatic switching device of dual power supply operates normally.
3、交流供电正常后再给直流电源送电，检查直流电源输出电压是否正常，是否正常送各直流开关入口侧。
3. After the AC power supply is normal, power on the DC power supply. Check whether the output voltage of the DC power supply is normal and whether it is normally sent to the inlet side of each DC switch.
4、检查直流电源是否送各用电设备端子，包括MNS扩展模块电源端子。检查完成后可以暂时关闭不用的仪表以等待下一步测试。
4. Check whether the DC power supply is sent to the terminals of all electrical equipment, including the power supply terminals of the MNS expansion module. After the inspection, the unused instruments can be temporarily closed to wait for the next test.
三、MNS低压抽屉柜的信号注入
3、 Signal injection of MNS low-voltage drawer cabinet
使用信号发生器向仪表注入信号时一定要明确注入点的性质和信号发生器的输出类型。电压信号不允许注入电流信号输入端。AI输入端要根据信号类型(2线制、四线制、电压、电阻、mv等)在仪表信号输入端带电注入对应信号，选错信号会导致信号发生器或仪表烧毁。
When using the signal generator to inject signals into the instrument, it is necessary to clarify the nature of the injection point and the output type of the signal generator. The voltage signal is not allowed to inject into the current signal input terminal. AI input terminal shall inject corresponding signals into the instrument signal input terminal according to the signal type (2-wire system, four-wire system, voltage, resistance, mv, etc.). Selecting the wrong signal will cause the signal generator or instrument to burn.
四、MNS低压抽屉柜的注意事项
4、 Precautions for MNS low-voltage drawer cabinet
1、仪表或MNS带电时，在电流信号输出端子上不允许注入电流信号，会导致烧表。
1. When the instrument or MNS is electrified, it is not allowed to inject current signal on the current signal output terminal, which will cause the meter to burn.
2、不允许使用电阻档测量带电设备或元件的电阻或通断，违犯本要求会导致电阻档烧毁。
2. It is not allowed to use the resistance gauge to measure the resistance or on-off of live equipment or components. Violation of this requirement will cause the resistance gauge to burn.
3、电阻箱是一种信号发货时呢过器，只能作为模拟电阻温度信号源使用，不允许随意做为可变电阻进行其它试验。
3. The resistance box is a kind of signal transmitter at the time of delivery. It can only be used as the analog resistance temperature signal source. It is not allowed to be used as a variable resistance for other tests at will.
4、将电流表串入回路测电流时应确认电流范围选用合适的档位。
4. When the ammeter is connected in series to the circuit to measure the current, it should be confirmed that the current range is selected as the appropriate gear.
In fact, it is normal for MNS low-voltage drawer cabinet to have some wrong wiring or wrong setting in the design process, but we should take effective measures to avoid as much as possible, and the above four steps can effectively avoid some problems and achieve the successful delivery of MNS low-voltage drawer cabinet. Come to our website for more relevant content http://www.tongyuhengcheng.com Ask!
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