适用范围 Applicable scope

       TVRD-380V系列三相交流保护继电器（又称三相电源监视器、相序保护器、过欠压保护器等）主要用于交流50/60Hz，额定电压460V以下，工业三相220V、380V、440V、460V等电压级别的各种故障检测，对三相输入电源的电压过高、电压过低、缺相、逆相(相序)、三相电压不平衡等提供继电保护，产品广泛应用于空压机、电动机、配电箱、水泵、油泵、中央空调机组、电控箱、配电柜、起重机等，如中央空调压缩机保护，各种电梯的电源监视，水泵、油泵防缺相、逆相保护等，是工业设备运行中维护设备工作电压正常的不可缺少的保护产品。

       本产品符合GB14085.5－2001 eqv IEC60947－1：1999标准。

      TVRD-380V series three-phase ac protection relay (also known as three-phase power monitor, phase sequence protector, overvoltage protector, etc.)It is used to communicate 50/60hz, rated voltage 460V, industrial three-phase 220V, 380V, 440V, 460V, etc.Fault detection, the three - phase input power supply voltage too high, too low voltage, phase - phase, reverse phase (phase sequence), three-phase voltage imbalance, and so on provide relay.Protection, products are widely used in air compressor, motor, distribution box, water pump, oil pump, central air conditioning unit, electric control box, power distribution cabinet, starting.Heavy machinery, such as the central air conditioning compressor protection, various elevator power monitoring, water pump, oil pump anti - phase, inverse phase protection, is industrial.Maintain 

the normal working voltage of the equipment and protect the products.

       This product conforms to gb14085.5-2001 eqv iec60947-1:99 standard.

结构特点 Structural characteristics of

1）安装方式：该保护器底座采用导轨式，内设两个M4螺孔结构，直接独立安装或HT35导轨安装。

2）指示灯：以5个指示灯分别来指示：正常，缺相（电压三相不平衡），逆相，过压，欠压。

3）外型尺寸： 68mm×35mm×76mm。

1) installation method: this protector base adopts the guide type, and two M4 screw holes are installed, and the installation of direct independent installation or HT35 guide rail is installed.

2) indicator light: it is indicated by five indicators: normal, missing phase (voltage three-phase imbalance), inverse phase, overvoltage, undervoltage.

3) external dimension: 68mm x 35mm x 76mm.

保护特性 Protective properties

1）缺相保护：指被保护线路在运行状态或非运行状态时，任意一相发生断相故障，延时2S动作。

2）逆相保护：防止L1、L2、L3三相交流相序接错的一种保护措施，延时2S动作。

3）电压不平衡保护：指三相电压不平衡将会影响线路安全运行的一种保护措施，三相不平衡率＝×100%>10%时，保护延时2S动作。

4）过压保护：指被保护线路电压高于设定值，延时3~8S动作，恢复回差为6~20VAC。

5）欠压保护：指被保护线路电压低于设定值，延时3~8S动作，恢复回差为3~20VAC。

1) lack of phase protection: when the protected line is in operation or non-operating state, any phase fault occurs and the delay 2S action.

2) reverse phase protection: a protective measure that prevents the communication phase sequence of L1, L2 and L3 phases, and the delay 2S action.

3) voltage imbalance protection: the three-phase voltage imbalance will affect the safe operation of the line, and the three-phase unbalanced rate = x.When 100% BBB 0 10%, the protection delay 2S action.

4) overvoltage protection: the voltage of the protected line is higher than the set value, the delay is 3~8S, and the return difference is 6~20VAC.5) under-voltage protection: the voltage of the protected line is lower than the set value, the time delay is 3~8S, and the return difference is 3~20VAC.