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PR-80L Power Line Protection Relay

PR-80L Power Line Protection Relay for motor

PR-80L Power Line Protection Relay

PR-80L power line protection relay is suitable for protection and monitoring of low-voltage lines with rated voltage below 690V and rated current up to 820A.

PR-80L provides real-time monitoring and comprehensive protection against overload, overcurrent, under/overvoltage, phase loss, phase sequence errors, grounding, leakage, and other line faults.  It measures and calculates three-phase current and voltage, frequency, active/reactive/apparent power, power factor, energy, and ground current, and compares the measured values with the preset protection parameters.

PR-80L power line protection relay realize measurement functions, protection functions, circuit breaker open and close control functions and remote communication functions and supports MODBUS-RTU communication.

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PR-80L Power Line Protection Relay for motor

PR-80L power line protection relay is suitable for protection and monitoring of low-voltage lines with rated voltage below 690V and rated current up to 820A.

PR-80L provides real-time monitoring and comprehensive protection against overload, overcurrent, under/overvoltage, phase loss, phase sequence errors, grounding, leakage, and other line faults.  It measures and calculates three-phase current and voltage, frequency, active/reactive/apparent power, power factor, energy, and ground current, and compares the measured values with the preset protection parameters.

PR-80L power line protection relay realize measurement functions, protection functions, circuit breaker open and close control functions and remote communication functions and supports MODBUS-RTU communication.

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Protection and Measurement functions

Protection and Measurement functions

Protection function Real-time measurement parameter
Over current protection – I

(Instantaneous Protection)

 Three-phase voltage/ current
Over current protection – II Three-phase line voltage
Over current protection – III Three-phase current
Overload protection

(Inverse-Time Overcurrent Protection)

 Voltage/ current phase angle
Overvoltage protection Ground/ earth leakage current
Undervoltage protection Three-phase current imbalance
Phase loss protection Thermal capacity
Phase sequence protection Thermal resistance
Custom trip function Frequency
Voltage sag ride-through (optional) Active/ reactive power
Ground fault / Earth leakage protection (optional) Power factor

 

Other functions

Function Description
Operation mode Protection mode or measurement and control mode configurable
Fault SOE Records the 100 latest fault events, time resolution:1s.
Operation record Records total operating time, total circuit breaker open time, opening count, and trip count.
Undervoltage / voltage loss restart

(optional)

 Supports automatic restart after short-duration undervoltage or voltage loss.

Feature

  • 85–265Vac wide-range auxiliary power supply;
  • Undervoltage, overvoltage and frequency monitoring;
  • Multifunctional LCD measurement display;
  • 100-event trip record storage;
  • Built-in test/reset and energy backup;
  • Phase loss and phase sequence protection;
  • Adjustable startup, response and release delays;
  • Flexible protection: shutdown, alarm or trip;
  • 4 programmable relay outputs;
  • RS485/ Modbus RTU communication;
  • Compact 83 × 83mm panel mounting;

Specification

Electrical parameters

Power supply 85-265V AC/DC
Power consumption <10 VA
Insulation resistance > 100MΩ
Alarm relay 5A @ 250VAC, or 5A @ 30VDC (NO contact)

Measuring accuracy

Current ± 0.5% @10%~200% Ie
Voltage ± 0.5% @10%~150%Ue
Frequency ± 0.1% @ 45~65Hz
Power factor ± 1.0% @ 0~1.0
Power ± 1.0% @ 0~500kW
Leakage current ± 1% @10%~100% of Ir
Analog output ± 1% @ 4~20mA
Thermal resistance ± 1% @0.1K~30K

Working environment

Motor rated voltage 220VAC, 380VAC, 660VAC
Motor rated current 0.5-820A
Working temperature -10C ~ +55°C
Storage temperature -25C ~ +70°C
Relative humidity < 93% RH
Altitude < 3000m
Atmospheric conditions Operating place must not have the explosive medium and contain Gases that corrode metals and damage insulating and conductive medium.

Electrical test

Electrostatic discharge IEC 61000-4-2, Level III
Electrical fast transient burst IEC 61000-4-4, Level III
Surge shock IEC 61000-4-5 , Level III
Withstanding voltage AC 2kV/ 1min between power / input / output

 

Product standards

GB / T 14048.1

(IEC 60947-1)

 Low-voltage switchgear and

control equipment General Provisions
GB / T 14048.4

(IEC 60947-4)

 Low voltage electromechanical contactors and

motor starters requirements
JB / T 10613-2006 General specification for

digital motor combined protection equipment
JB / T 10736-2007 Low voltage motor protection

Application

  • Industrial power distribution;
  • Industrial automation;
  • Motor drive systems;
  • Manufacturing process control;
  • Machine equipment protection;
  • Energy power systems;

Dimension

Wiring method

 

Typical Wiring Diagram Of Low-voltage Line Measurement And Control Mode (Frame Circuit Breaker)

Download

PR-80L Power Line Protection Relay -User manual-V1.11

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Chongqing Blue Jay Technology Co., Ltd. was founded by engineers with 10+ years of experience. Focuses on the development, production and sales of power automation monitoring products and energy metering instruments.

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Jiangyin High-tech Zone, Jiangyin City, China