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Motor Protection Relay

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Motor Protection Relay

MPD100A motor protection rely is anew-generation full-featured protection controller. It can protect motor incase of faults like overheat, overload, locked-rotor, undercurrent, unbalance,grounding or leakage, under-voltage, overvoltage by operating the contactor inAC motor control loop with AC 50HZ or 60 HZ, rated isolation voltage to 690V,rated current to 820A. At the same time, functions of measure, display,control, protection, transformation, and communication are available.


● Main loop
Controller rated current(In) 5A,25A,50A,100A,150A,200A,250A,300A,400A,500A,600A,750A,800A ,820A
Rated working voltage(Un)AC380V/660V,50Hz
Rated insulation voltage(Ui)690V
(Insulation strength) Power frequency withstand voltage 2kV,50Hz,1min
(Insulation strength) Impulsewithstand voltage 5kV,1.2/50μs
Subsidiary loop /
Rated working voltage CAC/DC85V-265V
Power consumption <10W
Output contact /
Contact Capacity AC220V(250V)/5A,DC30V/5A

● Measuring Precision
Content Condition Precision
Current 10%~120%le ≤±0.5%
120%~1000%le ≤±0.5%
Voltage 5~800V ≤±0.2%
Power ≤±1.0%
Frequency 45.0~65.0Hz ≤±0.1
Power factor -100.0~+100.0% ≤±1.0%
Electric degree ≤±1.0%
Thermal resistance 100~30000Ω ≤±2.0%


● Rated electric parameter
Frequency 50Hz
Power supply AC 85~265V DC 100~280V
Rated Voltage AC 220V/380V/660V
Rated Current AC 5A(1A~5A);35A(5A~25A);50A(25A~50A);100A(50A~100A)
External protection level CT will be applied when the current of primary electricmachine exceeds 100A. (5P10:10timessaturation,with deviation ni more than 5%.)
Overload capacity

Current loop:2 times rated current ,continuous;10times rated current, allowing 10s; 40 times rated current,allowing 1s.

Voltage loop:1.2times rated current,continuous work.
Power consumption DC:<0.5VA/phase
AC:<0.1VA/phase
Power supply 10W
Relay contact capacity Allowed long-termworking current 10A,voltage AC 250V
Switch input state quantity: AC 220V

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