arc flash relay schneider

VAMP 321 Arc Flash Relay Schneider

The arc flash relay schneider is mainly used to detect arc faults in electrical systems and protect equipment and personnel in electrical systems from arc faults. Arc protection relays can detect arcs by monitoring parameters such as current, voltage, and electric power, and quickly disconnect the power supply before an electrical fire occurs, thereby reducing the risk of fire.

 

Arc protection relays are usually used in medium and high voltage power distribution systems, control cabinets, transformers, generators, motors and other electrical equipment. They adopt the dual-criteria principle of arc light detection and overcurrent detection, and have the characteristics of fast protection action and high reliability.

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Features

  • Continuous system self-supervision
  • Event logs, disturbance recording and real-time clock
  • Three-phase current, Zero-sequence current
  • Two change-over alarm contacts including IF
  • Complete digital design, simple principle;
  • Strong electrical performance;
  • Comprehensive record of fault information;
  • Double criterion of over-current and arc, high reliability;
  • Optical fiber transmits, strong electromagnetic interference resistance;
  • Programmable logic of trip exit;
  • Fast exit tripping, short total fault clearing time.

 

Applications

  • Reduce the harm of arc light to human body;
  • Reduce damage to equipment caused by arc short-circuit faults;
  • Avoid transformer damage caused by bus failure;
  • Protect the dc system in the station;
  • Ensure the stable operation of power substations;
  • Thermal power plant electrical section switchgear;
  • Wind farm and photovoltaic station switchgear;
  • Large municipal engineering project;

 

Dimension:

 

 

 

Specification

Measuring circuits
Rated current IN 5 A (configurable for CT secondaries 1 – 10 A)
– Current measuring range 0…250 A
– Thermal withstand 20 A (continuously)
100 A (for 10 s)
500 A (for 1 s)
– Burden < 0.2 VA
Rated current I0 5 A / 1 A (optionally 1 A / 0.2 A)
– Current measuring range 0…50 A / 10 A
– Thermal withstand 4 x I0 (continuously)
20 x I0 (for 10 s)
100 x I0 (for 1 s)
– Burden < 0.2 VA
Rated voltage UN 100 V (configurable for VT secondaries 50

– 120 V)
– Voltage measuring range 0 – 175 V
– Continuous voltage withstand 250 V
– Burden < 0.5 VA
Rated frequency fN 45 – 65 Hz
Terminal block: Maximum wire dimension:
Solid or stranded wire 4 mm2 (10-12 AWG)
Trip contacts
Number of contacts Depends on the ordering code.
Rated voltage 250 V ac/dc
Continuous carry 5 A
Make and carry, 0.5 s

Make and carry, 3s

 30 A

15 A
Breaking capacity, DC (L/R=40ms)

at 48 V dc: at 110 V dc:

at 220 V dc

  

5 A

3 A

1 A
Contact material AgNi 90/10
Terminal block: Maximum wire dimension:
Phoenix MVSTBW or equivalent 2.5 mm2 (13-14 AWG)
Alarm contacts
Number of contacts: Depends on the ordering code.
Rated voltage 250 V ac/dc
Continuous carry 5 A
Breaking capacity, DC (L/R=40ms)

at 48 V dc: at 110 V dc: at 220 V dc

  

1,3 A

0,4 A

0,2 A
Contact material AgNi 0.15 gold plated
Terminal block Maximum wire dimension
– Phoenix MVSTBW or equivalent 2.5 mm2 (13-14 AWG)

 

 

 

 

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