With the development of motor industry,motor protector plays an indispensable in promoting modern economic development. But in the process of industry, motor also needs to be monitored and protected.Our comprehensive intelligent motor protectors which adopt wide-range -temperature and low-power-consumption 16-bit single chip microcomputer and intellectual property and software copyright, plays an important part in information collection, calculation, analysis, measurement and control, protection, alarm, monitoring, interlocking, controlling in the process of running. Its industries use almost permeates various fields of industry including agriculture, national defense, construction and normal operation of the three-phase motor used in the people's living and guarantees an effective security .Therefore, it’s significant of protection of the motor, which promotes energy saving, production efficiency improving and economic benefit and the safety in production.
The new generation of intelligent protector achieves computing power, accident analysis, motor fault report, etc. in addition to conventional low-voltage motor protection, monitoring and control function.As a comprehensive measurement, the motor protection control system can improve the reliability and security of the power supply system of the enterprise, improve automation management level of the enterprise in the operation of the production.
Use range
The motor is suitable for low voltage motor, rated current is less than 1000A, and the rated frequency is 50Hz. The functions of remote automatic control, field direct control, panel LCD full Chinese instruction, signal alarm and field bus communication are realized. Through the fieldbus, the integrated industry USES MODBUS-RTU communication protocol, which communicates with the intelligent MOTOR control center to realize remote measurement and control, protection and setting of MOTOR circuits.
Product is small in size, compact structure, convenient installation, in the low voltage control terminal cabinets and various drawer ark can be installed directly above a quarter and a quarter, improves the security and reliability of control circuit and automation management level.
Adopt the integration module structure to form integration,with the main body (protection control, operation, LCD display module), the transformer detection module. It is suitable for mining, chemical, cement, petrochemical, smelting, power, ship and civil construction..
Main features
- USE 16 industrial-grade chips with wide temperature and low power consumption, which is more suitable for industrial site use.
- HAVE software, hardware and electromagnetic compatible self-calibration function design, the super anti-interference ability and the precise sensitive action reliability, especially suitable for the industrial site use.
- SET the sensor ratio, and the user can directly view the power parameters of the loop, making the sampling data more intuitive.
- ADOPT AC synchronous sampling and the advanced digital signal microcomputer processing conversion, realized the high precision, real time data processing, excellent reliability and fast response speed, accurate in measurement, high accuracy, the event log, etc.
- HAVE a self-learning process, which can automatically detect the starting process and time of the motor, can generate the starting current curve and optimize the protection parameters, which can be set up to open or close the function, etc.
- Event recording function: when protecting action starts, record the protection type, sampling current and other parameters, form the event recall data, in the case of loss of electricity can be saved for a long time, easy to analyze afterwards.
- ADOPT integrated modular design structure, small in size, compact structure, convenient installation, in the low voltage control terminal cabinets and 1/4 modulus and above all kinds of drawer cabinet can be directly installed by the self-contained wire or guide, improves the safety and reliability of the control circuit and the automation management system.
- The compact, gorgeous, exquisite appearance and excellent Chinese widescreen LCD design embodies elegant, delicate and compact products.
- Perfect accident record and self-check function, friendly man-machine interface, all measurement values and parameters, protection information, etc. are displayed in real time Chinese by panel liquid crystal display.
- Creative integration of power quality, accident warning, accident report and other functions.
- The three phase voltage, three - line current, power, power factor, frequency and heat condition are collected. The accuracy of optimization measurement is at least 5%.
- The intelligent network of intelligent motor protection is completed and intelligent operation and monitoring management is realized. The user can improve the automatic management level of the massive low voltage motor.
- On the basis of the existing protection function, mainly to upgrade the LCD module, LCD module optional wide dot matrix LCD, or touch LCD screen, LCD module and protection control module can be upright, or remote connections.
- On the basis of the existing protection function, the protection function is improved and the integration of the protection function is maximized.
Protection function: Overflow protection, underflow protection, open-phase protection, three-phase unbalanced protection, motor Shaft Lock Protection, under-voltage protection, overvoltage protection, start timeout protection, leakage protection, short circuit protection.
When the load of motor are carrying pump load, motor racing or running underflow, which causes serious damage, protector provides underflow protection. When the percentage of the average current and the rated current of the three-phase is lower than the set value, the protector should react in action (delay) setting time or alarm in the alarm time.
- Overflow protection
Under a load failure, when the motor run over the rated current for a long time, can lead to overheating, and insulation to reduce and burned, protector based on the heating characteristics of the motor, will calculate the heat capacity of the motor, simulate motor heating characteristics, overload protection tripping levels corresponding to the different characteristics to protect motor.
- Motor Shaft Lock Protection
Motor in the process of starting or running, if electric shaft is stuck due to overload or own machinery, and did not remove the fault in time, will cause the motor overheating and burn motor. Locked-rotor protection is suitable for such fault protection when motor starts. Blocking protection is suitable for such a failure in the process of motor operation. When the current reaches action set current, protector should react in action (delay) setting time action or alarm in the alarm time.
When the harm of the motor occurs, open-phase(imbalance) protection operates. When the motor open-phase or three phase current serious imbalance occurs, such as imbalance rate reaches the protection setting, protector will set a parking or alarm instructions according to the requirements of setting to make motor run more safely.
leakage protection
The protector also has grounding protection and leakage protection. Earthing protection current signal comes from the vector and the inner current transformer, used for protection of motor metal case of short circuit. The protector can detect the fault current in 30 ~ 50mA through increasing leakage current transformer, is mainly used for indirect grounding to ensure personal safety.
- External fault protection
When protector detect external faults, external fault switch input and protector switch input of the definition are inconsistent, the protector will react according to the requirements of setting to ensure the motor equipment safety.
- Start-up time-out protection
In the process of motor starting, the protector has only (imbalance), phase grounding/electric leakage protection function, and the rest of the protection function doesn't work. At the end of the start, all the protection function (set by the user) are automatically input. When the motor starting time exceeds the set ting time by the user and current is greater than 1.1 times the rated current, the protector will react according to the requirements of setting in the action (delay) setting time to give out parking command and stop the motor running.
- Phase protecting
The protectors with phase sequence protection function should not move when the voltage phase sequence of the power side is in accordance with the sequence of the set. The motor should not be started when the protective device detects that the phase sequence of the electric d is wrong.
Undervoltage protection
Low voltage will cause motor speed reduced, and even stop running. When the motor running voltage drops to set the range of low voltage protection, protector will react according to the requirements setting in action (delay) setting time or alarm in the alarm time, to avoid unnecessary chaos and serious impact production.
- Overvoltage protection
High voltage will cause damage to motor insulation level. When the motor running voltage is more than setting, the protection will react according to the requirements set in action (delay) set time or alarm in the alarm time, to ensure the safety of the motor equipment.
- Underpower protection
Motor runs underpower due to the gear damage, loss of mechanical output ability, motor power factor is lower, but the motor current is large, greatly consume power of system. When the load power and the percentage of the power rating is lower than the set value, protector will react in action (delay) setting time or alarm in the alarm time.
- Overheat protection
The thermal protection of the low - voltage motor is solved by using the mathematical method to establish the heating model of the motor.
