ABB REA 101 arc protection relay

ABB REA 101 arc protection relay

Product Overview

REA 101 is an arc protection relay (central unit) launched by ABB, which is the core component of REA 10_ arc protection system. It is mainly used in low-voltage or medium voltage air insulated metal enclosed switchgear, and can quickly send tripping commands to all circuit breakers that may supply power to arc faults, in order to minimize the damage caused by arc faults.

Brand background

REA 101 is produced by ABB company. ABB is a leading global enterprise in electrical and automation technology, with business covering multiple fields such as power, industry, transportation, and infrastructure. It has over 130 years of technological accumulation and innovative experience. Its products are renowned for their high quality, performance, and reliability, and have a wide influence in the field of industrial automation control. REA 101 is a reflection of its technical strength in the field of arc protection.

Specification parameters

Current input rated current 1A/5A; Continuous load current 4A/20A; Instantaneous current of 100A/500A per second; Dynamic withstand current (half wave value) 250A/1250A; Input impedance<100m Ω/<20m Ω; rated frequency 50/60Hz

Output HSO1 and HSO2: rated voltage of 250V DC/AC, continuous carrying of 1.5A, on-off of 30A in 0.5 seconds, on-off of 15A in 3 seconds, DC breaking capacity (when L/R<40ms) of 5A/3A/1A at 48V/110V/220V, respectively

TRIP3: Rated voltage 250V DC/AC, continuous load capacity 5A, on-off 30A in 0.5 seconds, on-off 15A in 3 seconds, DC breaking capacity (when L/R<40ms) 5A/3A at 48V/110V/220V respectively

IRF signal contact: rated voltage 250V DC/AC, continuous load 5A, on-off 10A in 0.5 seconds, on-off 8A in 3 seconds, DC breaking capacity (when L/R<40ms) 1A/0.25A/0.15A at 48V/110V/220V respectively

Control input (reset) rated voltage: 24/48/60/110/220/250V DC, 110/120/220/240V AC; Scope of work: 18-300V DC, 18-265V AC; Control current of 1.5-20mA; minimum pulse length of 1s

The optional action delay for circuit breaker failure protection is 100ms/150ms; The accuracy of HSO2 action time is ± 5% of the set value; TRIP3 is ± 5% of the set value+5-15ms

Rated voltage of power supply: 110/120/220/240V AC, 110/125/220/250V DC; REA101-CAA and REA101-CAAG are 24/48/60V DC

Voltage variation range: AC is 85-110% Ur, DC is 80-120% Ur

Power consumption is about 9W/12W in static/working state; The maximum output power of the port is about 19W; the maximum power consumption when connecting 10 expansion units is less than 50W

The maximum length of the sensor fiber is 60m when there is no connector or 1 connector; 50m when there are 2 connectors; 40m when there are 3 connectors; the working temperature range is -35-+80 ° C; the minimum bending radius is 50mm

The maximum total length of the connecting chain between the central unit and the expansion unit of the connecting cable is 40m

Optolink communication plastic fiber maximum length 40m; glass fiber maximum length 2000m

Set the current range with step sizes of 0.5, 1.0, 1.5, 2.5, 3.0, 5.0, and 6.0 times the rated current; Neutral line current setting step size 0.05, 0.10, 0.15, 0.25, 0.3, 0.5, 0.6 times rated current; Action accuracy is ± 5% of the set value or ± 2% of the rated current

Total action time HSO1 and HSO2<2.5ms; TRIP3<15ms

Environmental testing operating temperature range -10-+55 ° C; transportation and storage temperature range -40-+70 ° C; meets multiple environmental testing standards

The protection level of the shell is IP20; Weight approximately 4.6kg

Insulation test dielectric test 2kV, 50Hz, 1min; Impulse voltage test 5kV, 1.2/50 µ s, 0.5J; Insulation resistance>100M Ω (500V DC)

Electromagnetic compatibility meets multiple EMC testing standards, such as 1MHz pulse interference, electrostatic discharge, radio frequency electromagnetic field interference, etc

Core functions

Overcurrent detection: It can perform three-phase or two-phase neutral line overcurrent detection, with adjustable current threshold, and can quickly respond to fault currents.

Arc light detection: Detect arc light through fiber optic sensors or lens sensors, activate when the light signal exceeds the set reference level, and support automatic or manual backlight compensation.

Trip output: Equipped with two high-speed solid-state (IGBT) outputs (HSO1, HSO2) and one overload relay output (TRIP3), used for circuit breaker tripping. The tripping condition can be set to meet both the optical signal and overcurrent signal or only the optical signal.

Expansion unit connection: Connect expansion units (such as REA103, REA105, REA107) through ports A and B. Each port can cascade up to 5 expansion units to expand protection range and selectivity.

Optolink communication: Two Optolink communication links can transmit optical signals, overcurrent signals, trip signals, etc. between central units to achieve collaborative protection.

Circuit breaker failure protection: When the circuit breaker fails to successfully disconnect the fault current, a trip command is issued to the upstream circuit breaker after a set delay.

Self monitoring: Continuously monitor the sensor fiber optic circuit, operating voltage, wiring between the central unit and expansion unit, etc. When a fault occurs, activate the corresponding indicator light and reset the IRF relay.