Smart Motor Protection Relay (S-EMPR)

Features

	Total Digital Motor Protection Relay with the MCU (Microprocessor Control Unit) Real-time processing and high precision
	One-Body Type and Separate Body Type The display can be attached to the panel front so that current, operation time and settings can be checked without fetching the unit. With the display separated, the motor can be protected.
	Applicable to Inverter Circuits Thanks to its good high harmonic noise characteristics, it can be applied to the 2nd stage of inverter control circuits. The available frequency range is 20~200Hz. When the relative harmonic factor is over 30%, a harmonic filter should be installed (However, the ground fault function should be off).
	Wide Current Control Range: 0.125~100A for One Model With the slide S/W, the current control range can be decided 0.5~10A or 5~100A. According to the CT penetration number, even 0.125A current can be controlled. (Wire penetration hole).
	Up to 100A current, it can be used without an external current transformer for convenience and economic efficiency.
	Various Recovery Functions Manual, automatic and electric recovery functions are provided for customer convenience.
	Wide Ground Fault Sensitivity Current Control and Double Protection: 30mA~25A Both zero-phase-sequence current and post-arc current are detected simultaneously to provide customers with convenience and economic efficiency.
	Password Settings are protected with a password.
	Heat Accumulation Inverse Time, Inverse Time and Definite Time Modes According to user’s needs, the motor can be protected in the inverse time mode or definite time mode.
	Storage of Fault Events Up to five fault events can be stored for easy fault history management.
	3-Phase Digital Ampere-Meter 3-phase current is displayed every two seconds for motor monitoring.
	Quick Setup All settings can be decided quickly on the display.
	Date When a fault occurs, its date and time are stored foreasy checkup.
	Total Operating Time Setup When the total operation time is over, it is displayed for changing motor bearings or supplying oil.
	Communication RS485 and MODBUS are supported for communication with various systems. The model with analogue signals (4~20mA) is compatible with transducer systems.

Characteristics

Protection

• Overload-49
  • Motor current is detected and is applied to I2t. If it reaches the characteristic curve, overload protection is on.
  • The overload function can be set to be on when the current is increased by 600% in consideration of motor operating time. Since operation time can be set from 1 second to 60 seconds in 1-second increments, up to 60 classes can be decided for overload characteristic curves.
  • In the definite time mode, regardless of motor heat, current after delaytime is