Motor Protection Relay

– Full-featured protection for low-voltage motors.
– Providing customized protection and integrated process control.
– Real-time monitoring of motor statuses for proactive fault warnings.

Blue Jay Motor Protection Relay

Blue Jay PR series motor protection relay combines monitoring, control, protection, communication, and other functions for low-voltage motor protection. In the event of overcurrent, undercurrent, phase failure, overvoltage, under voltage, or three-phase inequality, the PR series motor protection relay will trigger an alarm or protective control. It is available for various applications such as pumping, air handling, chiller systems, and bulk material handling.

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Your Leading Intelligent Motor Protection Relay Manufacturer

Blue Jay is a reputable manufacturer and supplier specializing in professional motor protection relays, offering top-quality products and technical solutions. We are dedicated to becoming the premier supplier of three-phase motor protection relays. As for the Blue Jay motor protection relay line, we provide a wide range of options, from simple to advanced functions. Our motor protection products enable real-time monitoring of various electrical energy parameters in low-voltage motor circuits and feeders at industrial sites. For more information about the distinctions and features of our electronic motor protection relays, contact us directly.

Comprhensive motor protection: Thermal, overload, mechanical jam, unbalance, thermistor, Ground fault, UV underpower, etc.

Motor diagnostic Information: sequence of events data, motor learned data, wavefrom capture, RMS data logger.

Designed to meet IEC requirements of Low voltage motor applications. OEM & ODM service supported.

Specification of Motor Protection Relay

Basic Technical Parameter	Value
Auxiliary Power	85-265Vac/dc
Power consumption	<4VA
Insulation resistance	>100MΩ
Relays	5A/250VAC, 5A/30VDC (NO contact)
Motor rated voltage	AC220V / AC380V / AC660V
Motor rated current	0.5-200A use internal CT
Leakage current sensor	0-1A
Impulse withstand voltage	4 kV
Start mode – Protection Only	All PR Series has this function
Metering Function	Three phase amp
Digital Output	Regular 2DO, max 6DO
Analog Output	4-20mA
Display	LED/LCD
Protection Function	Value(IEEE / ANSI C37.2)
Overload	49, 51
Over Current – Jam in starting	51R
Phase loss	47
Current imbalance	46

Feature of Motor Protection Relay

Blue Jay designs and manufactures compact motor protection relays. Each of our motor management relays replaces the need for separate devices like motor current, phase loss, overload, and thermal relays, integrating comprehensive protective, monitoring, and control functions for low-voltage motors.

Multiple Protection integration: Phase loss, overload, stall, blocking, three-phase unbalance protection

Mounting Options: Panel mounting HMI unit and DIN-rail mounting control module

Suit for Motor under 0.66KV and any current range

DI & DO Options: 11way DI input, 6way DO output programmable

Parameters Measurement: U, I, P, Q, S, PF, EP, EQ measurements

RS 485 Modbus RTU & Data logging

Application of Motor Protection Relay

Our digital motor protection relays are widely used in Chemical, Oilfield, power plant, rail, metallurgical mine, pipe gallery, water pump, steel, etc.

In heavy industries such as cement and steel, motor management relays safeguard core production motors against overloads and overheating, ensuring continuous, 24/7 operation.

For critical infrastructure such as power plants and railways, our relays ensure the reliable operation of vital equipment, preventing service disruptions caused by motor failures.

In harsh environments, such as oil fields, these relays are crucial for handling complex electrical conditions and ensuring equipment safety and stability.

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Blue Jay

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