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|Current Range:||1-30A||Time-current Characteristic:||Definite Time & Inverse Time Selectable|
|Rated Voltage:||220VAC,50/60Hz||Measurement Error:||1%|
|Protective Functions:||Overcurrent,undervurrent, Locked-rotor, Phase Loss, Phase Unbalance||Contact Capacity:||5A 250VAC|
LED Display Motor Multifunction Protection Relay Digital Setting For Compressors
1 . Why is the motor burned more easily than before?
Due to the continuous development of the insulation technology, the design of the motor requires not only increased output, but also requires a reduction in the volume, so that the heat capacity of the new type of motor becomes smaller and smaller, and the overload capacity becomes weaker and weaker; The motor often operates in many ways such as frequent starting, braking, reversing, changing load, etc., and imposes higher requirements on the motor protection device. In addition, the motor has a wider application area and often operates in extremely harsh environments, such as humid, high-temperature, dusty, and corrosive environments. All this has caused the motor to be more easily damaged than in the past, especially overloads, short circuits, phase loss, brooms and other faults occur most frequently.
2 . Why is the traditional protection device less effective?
The traditional motor protection devices are mainly thermal relays, but the thermal relays have low sensitivity, large errors, poor stability, and unreliable protection. The same is true, although many devices installed thermal relays, but the phenomenon of motor damage and affect the normal production is still widespread.
3 . What is the status of motor protection development?
The motor protector has been developed from the past mechanical type to electronic and intelligent, and can directly display the motor current, voltage, temperature and other parameters, high sensitivity, high reliability, multi-function, easy debugging, fault types after a protective action at a glance, It not only reduces the damage of the motor, but also greatly facilitates the judgment of the fault, which is beneficial to the troubleshooting of the production site and shortens the recovery production time. In addition, the use of motor air gap magnetic field motor eccentricity detection technology makes it possible to monitor the wear state of the motor. By showing the trend of changes in the degree of eccentricity of the motor, early detection of bearing wear, internal and external rounding can be performed. Early detection, early processing, to avoid the occurrence of brooming accidents.
4 . Protector selection principle? Reasonably select the motor protection device to achieve both the full use of the motor's overload capacity and avoid damage, thereby improving the reliability and continuity of production of the electric drive system. The specific function selection should comprehensively consider the value of the motor itself, the type of load, the use environment, the degree of importance of the motor main equipment, and whether the motor exit operation will have a serious impact on the production system, and strive to be economically reasonable.
5 , the ideal motor protector? The ideal motor protector is not the most functional, nor the so-called most advanced, but should meet the actual needs of the site, to achieve the unity of economy and reliability, with a high performance to price ratio. According to the actual situation of the site, the type and function of the protector are reasonably selected. At the same time, it is considered that the protector is easy to install, adjust, and use. It is more important to select a high-quality protector.
-- Compact modular size with integrative structure
-- Built-in LED and keypad afford a precise,digital setting
-- Three-phase monitoring of short-circuit, locked-rotor,overcurrent,
undervurrent, phase loss, phase unbalance
-- Adjustable reset mode:automatic reset or manual reset
-- Adjustable power-on delay
-- 1 C/O contact
♦ Protective Functions
-- Short-circuit -- Locked-rotor -- Overcurrent
-- Undercurrent -- Phase loss -- Phase unbalance
♦ Typical Applications
• Pumps • Fans • Blowers • Motors • Compressors
♦ Technical data
|Time-current characteristic||definite time||
definite time & inverse time
phase loss, phase unbalance
|Additional functions||power-on delay,auto reset|
|Indicators||LED indicating current,operation status|
|Output contacts||1 C/O|
|Contact capacity||5A 250VAC|
|Dimensions (L x W x D)||70×55×98mm|
Contact Person: sales