Low voltage motor protection measurement and control device (HLM)

HLM-501The series of low-voltage motor protection and measurement devices is an intelligent instrument that improves the safety and automation management level of motor operation. The core adopts the United StatesMICROCHIPThe company's microcomputer controller is developed with low-power integrated circuits. This protector has complete protection functions, intuitive measurement parameters, sensitive response, timely and reliable action, and can communicate with the upper computer to form a high-tech product that integrates remote monitoring. Widely used in industries such as petroleum, chemical, coal, metallurgy, power, steel, cement, mining, light industry, textile, etc., ideal for low-voltage motor protection and remote monitoringThe product.

2、 Characteristics

1Adopting microcomputer technology and high-performance low-power circuits, with high-speed operation and stable performance.2Modular structure of the whole machine, card type current sensor, small size, easy installation. It can also be installed separately, with the main body dimensions following international instrument device standards.

3Using digital processing technology, it has high measurement accuracy, good linearity, fast fault diagnosis speed, and is accurate and reliable.

4High definition wide temperate backlightLCDDisplay, parameter setting, measurement, and fault recording are intuitive and convenient.

5Equipped withRS485Communication interface, which can communicate with computers to form a remote monitoring integrated motor protection network.

6One machine is versatile and can replace ammeters, current transmitters, thermal relays, leakage relays, and working power voltmeters.

7Having4~20mAThe standard current output signal can be directly connected to industrial secondary instruments or computer systems.

3、 Scope of application and usage conditions

1The380VAC，660VACThree phase asynchronous motor, feeder circuit protection.

2Protection device power supply voltage;220VAC±15%，380VAC±15%The50HZ±2%.

3External structure: There are two forms: integral and split, with a split installation distance of ≤5Rice.

4Environmental temperature:-30℃~+65℃, relative humidity ≤90%.

5Operating environment: There is no environment with gases that can corrode metals and damage insulation properties.

6Installed in places without severe vibration impact, strong magnetic field interference, and rain and snow invasion.

4、 Main functions
1Setting functions: rated current, protection current curve, starting time, three-phase imbalance, locked rotor ratio, leakage current value, overvoltage and undervoltage value, communication address, self starting time of the motor when the protector is powered on.

2Protection functions: overcurrent, locked rotor, three-phase imbalance, short circuit, leakage, phase failure, overvoltage and undervoltage.

3Display function:ATheBTheCThree phase current, leakage current, operating voltage, protection action fault data and fault records, and parameter settings.

4Remote transmission function: equipped with4~20mAStandard current output signal,20mATwice the rated current value set accordingly.

5Communication function: ThroughRS485Serial communication and computer can form256The conventional protection control network of the Taiwan protector. Remote data setting and display alarm, remote motor start, stop control, etc.

6Memory function: It can store the causes of three recent motor failures, and can press the shift button to retrieve the last motor failure code, and press again to display the previous failure code.

5、 Main technical indicators

1Scope of testing

1.1 ATheBTheCthree-phase current:0—999A.

1.2 Leakage current:0—999mA.

2Measurement accuracy:1.5 Grade（I≤IeRated current).

3Protection contact capacity: normally openAC250/6A, often closedAC250/6A.

4Range of startup time setting:1~ 99SProtect against phase failure, leakage, short circuit, and imbalance during startup time (default value is10S）.

5Locked rotor protection: When the three-phase current reaches or exceeds the rated locked rotor current, the action time is ≤0.5SThe default value is4Ie）.

6Short circuit protection: Any phase current reaches or exceeds8IeWhen the current is applied, the action time is ≤0.2S.

7Phase failure protection: When any phase is disconnected, the action time is ≤2S.

8Unbalance protection: When the ratio of the current difference between any two phases in the three-phase current is greater than or equal to the imbalance coefficient, the action time is ≤2SThe default value is60%）.

9Leakage protection: When the leakage current of the motor is ≥ the rated leakage current, the action time is ≤0.2SThe default value is50mA）.

10Overcurrent protection: When the current of the motor is ≥1.2IeWhen the protector is pressed for reverse overcurrent protection, the action time is shown in Figure 1 (default value is1）.

11Overvoltage protection: Working voltage ≥ rated overvoltage voltage, action time ≤5S.

12Undervoltage protection: working voltage ≤ rated undervoltage, action time ≤10S.

13The4~ 20mACurrent output accuracy:0.3%F.S（20mACorresponding rated value).