GE 369-HI-0-M-0-0-0 Motor protection relay

GE   369-HI-0-M-0-0-0   Motor protection relay

Performance characteristics

Powerful protection functions: It is equipped with protection functions such as overcurrent, low current, overheating 

and ground fault, and can also perform current imbalance and single-phase detection, effectively preventing the 

motor from being damaged due to various electrical faults. It simultaneously supports dual-speed motor protection 

and phase overload curves, and can meet the protection requirements of different types of motors. Users can also 

adjust the inrush current, cooling rate and/or acceleration of the motor to further optimize the protection 

performance.

Measurement and metering functions: It can display information such as kilowatts, kilovolt-amperes, frequencies, 

phase voltages, power factors and megawatt-hours. Equipped with an optional metering kit, it can enable the phase 

voltage (VT/PT) input on the device, with a maximum VT ratio of 2400:1, and can accept VTs in open triangle or star 

connections. The metering options also include three additional analog outputs, and all outputs (including the 

standard analog current output of the basic unit) share a common circuit. All these analog outputs can be 

programmed on-site.

Good communication capability: Equipped with non-isolated RS232 ports and RS485 ports, it is convenient to 

communicate and connect with other devices or systems. Relay-related data can be transmitted to the SCADA system 

or workstation, facilitating remote monitoring and management.

Data recording and analysis: It has an event recording function, capable of recording events such as power failure, 

alarm, self-test, suppression, and tripping. It can also capture waveforms. When tripping, it can trigger three waveform 

records and capture sixteen data cycles, which is helpful for users to analyze the causes of motor faults. The data 

generated by the relay can be viewed on its liquid crystal display or through a computer running the EnerVista 369 

software program for trend analysis.

Fast response speed: The time delay of the differential switch is less than 200ms, which can respond quickly when the 

motor malfunctions, promptly cut off the circuit or issue an alarm signal, reducing the damage caused by the fault to 

the motor.

Wide adaptability: The rated control power supply is 50-300 VDC or 60-265 VAC, which can adapt to a relatively wide 

range of power input. The operating temperature range is -40 ℃ to + 60℃, and the storage temperature range is

 -40 ℃ to + 80℃. It can work in various harsh environments, and the maximum altitude it can adapt to is up to 2000 

meters.

Mainly by monitoring parameters such as current, voltage and temperature of the motor in real time and comparing 

them with preset thresholds, and controlling the action of internal contacts based on the results, multiple protection 

functions are achieved. Specifically as follows:

Overcurrent protection: When the motor current exceeds the set value, the relay will determine it as an overload fault. 

At this point, the electromagnetic coil inside the relay generates a magnetic field, causing the switch contacts to act 

and cut off the power supply to the motor, preventing the motor from being damaged due to overload.

Overheat protection: Monitor the temperature changes inside or outside the motor through the built-in temperature 

sensor. When the motor temperature exceeds the set value, a protection action is triggered. Similarly, the internal 

contacts are controlled to disconnect the circuit to prevent the motor from burning out due to overheating.

Overvoltage/undervoltage protection: Continuously monitor the power supply voltage of the motor. When the voltage

 exceeds or falls below the rated voltage, the relay determines that it is an overvoltage or undervoltage fault and then 

cuts off the power supply to the motor to prevent damage to the motor due to abnormal voltage.

Phase loss protection: Real-time detection of the three-phase current of the motor. When one phase of the 

three-phase current is missing, the relay identifies it as a phase loss fault and quickly cuts off the power supply to the 

motor, protecting the motor from damage caused by phase loss operation.

Ground fault protection: By detecting the zero-sequence current in the motor circuit, when a ground fault occurs and 

the zero-sequence current reaches the set value, the relay will act to cut off the power supply, preventing ground faults

 from causing safety accidents or equipment damage.

Current imbalance protection: It monitors the balance state of the three-phase current of the motor. When the 

imbalance degree of the three-phase current exceeds the preset value, it is considered that there is a fault. The relay 

will issue an alarm signal or cut off the power supply to prevent the motor from being damaged due to current 

imbalance.

Application scenarios

In the manufacturing industry, during the process of CNC mechanical processing, it can ensure the stable operation of 

the motor, and provide timely protection against faults such as overcurrent and overheating, avoiding the decline in 

processing accuracy or equipment damage caused by motor failures. In the automotive manufacturing production line,

 it can provide protection for various conveyor motors, assembly motors, etc., ensuring the continuity and reliability of 

the production line, reducing downtime and maintenance costs.

Energy industry: In power generation facilities, it can be used for the protection and monitoring of fan motors, feed 

water pump motors, etc. It can monitor the operating status of the motor in real time, promptly identify potential 

faults, ensure the normal operation of power generation equipment, and improve power generation efficiency. In the 

field of oil and gas extraction, it can be applied to the motors of oil pumping units, water injection pumps, etc., 

adapting to harsh working environments and preventing motor faults such as overload and short circuit from affecting

 oil and gas extraction operations. In substations, the motors of cooling fans and dehumidification equipment within 

the station can be protected to ensure the normal operating environment of substation equipment.

In the chemical industry, during the chemical production process, many reaction vessel stirring motors, material convey

ing motors, etc. need to operate reliably. This relay can prevent the motor from malfunctioning due to corrosive gases, 

dust and other factors in the chemical environment, and at the same time monitor the electrical parameters of the 

motor to ensure the safety and stability of the production process.

In the water treatment industry: In scenarios such as pump, water tank, well and reservoir control, it can effectively 

protect the pump motor, prevent motor damage caused by abnormal water level, motor overload and other reasons, 

and ensure the normal water supply of the water treatment system. In the wastewater lifting station and the rainstorm 

water monitoring system, the operation status of the motor can be monitored in real time to ensure the timely 

treatment and discharge of wastewater and prevent environmental problems such as sewage overflow.

Commercial buildings: In large commercial buildings, it can be used for the protection of equipment such as fan 

motors and elevator motors in air conditioning systems. Ensure that these motors are stable and reliable during 

long-term operation, providing a comfortable environment and convenient transportation for commercial buildings, 

reducing equipment maintenance costs and the impact on commercial operations.