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Rishabh ELR VI Digital Earth Leakage Relay with Voltage and Current Protection

Rishabh ELR VI Digital Earth Leakage Relay with Voltage and Current Protection

Brand
Rishabh
Model number
ELR VI

Earth leakage relay with CBCT, current and voltage inputs: leakage plus over/under voltage, over/under current and reverse power protection, and V, I, leakage measurement.

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Key features

  • CBCT, current and voltage input (one each)
  • Over / under voltage, over / under current and reverse power protection (3P4W balanced, 3P3W balanced, 1P2W)
  • Measures voltage, current and leakage current of the load in one device; trip relay cum DPM
  • True RMS measurement up to 15th harmonic
  • Programmable leakage trip setting from 30 mA to 30 A with pre-alarm
  • CBCT open detection
  • Inverse curve for higher earth leakage current
  • 4-digit ultra bright LED display
  • Stores the last 15 faults
  • Auto re-closure or manual reset
  • Test and reset keys on the front panel
  • Password protection
  • Configuration via USB with PRKAB (Modbus)
  • DIN-rail or 96 x 96 mm panel mounting
  • Applications: control panels and switchboards, chemical plants, oil refineries, mining, generators, feeders, transformers, motors

Specifications

Voltage input
Nominal input voltage500 V AC
PT secondary50 V to 500 V programmable on site
PT primary50 to 1200 kV programmable on site
Max. continuous voltage127% of PT secondary
Current input
Nominal input current5 A
CT secondary1 A to 5 A programmable on site
CT primary1 A to 999 kA programmable on site
Max. continuous current145% of CT secondary
Input
Operating frequency range45 to 66 Hz
Accuracy
Voltage / current / power±1% / ±1% / ±2% of nominal value
Leakage current±5% of full scale
Trip and pre-alarm delays±5% of set delay or ±50 ms, whichever is greater
Instantaneous tripping< 25 ms for leakage current greater than 5 x In
Burden
Voltage / current input< 0.6 VA / < 0.25 VA per phase
Settings
Over / under voltage101 - 125% / 70 - 99%
Over / under current101 - 140% / 20 - 99%
Hysteresis (leakage, alarm)5 - 40%
Trip delay0 - 30 s
Power on delay0.5 - 30 s
Auto re-closure delay1 - 30 s, 1 to 5 re-closure attempts
Relay resetAuto re-closure / manual
Relay configurationEnergize / de-energize
Leakage input
Leakage current (In)30 mA to 30 A
Tripping range80% to 100% of In
Auxiliary supply
Higher aux (HA)60 V - 300 V AC/DC
Lower aux (LA)20 - 60 V DC / 20 - 40 V AC
Frequency45 to 66 Hz
Burden< 4 VA approx. for AC aux
Relay contacts
Rating5 A / 250 V AC / 30 V DC
Mechanical endurance1 x 10^7 operations
Electrical enduranceNO 3 x 10^4 operations
Standards
TestingIEC 60947-2 Annex M
EMCIEC 61326-1:2012, Table 2; immunity IEC 61000-4-3 10 V/m
SafetyIEC 61010-1-2010, permanently connected use
Installation category300 V CAT III / 600 V CAT II
High voltage test2.2 kV AC, 50 Hz for 1 minute
General
Operating temperature-10 to +55 °C
Storage temperature-25 to +70 °C
Relative humidity0 - 95% non condensing
Shock15g in 3 planes
Vibration10 - 55 Hz, 0.15 mm amplitude
EnclosureIP20 (front face only)
MountingDIN rail or 96 x 96 mm panel mount (panel cut-out 92 x 92 mm)
Weight< 300 g approx.
CBCT cableMax. 1 m between relay and CBCT, twisted pair shielded cable
Ordering
Order codeRISH ELR VI - 4021 (1 CO + 1 CO) - [HA / LA aux], e.g. RISH ELR+ - 4011 - LA - 96 (panel mount 96 x 96)

Specifications are from the manufacturer's published information. Confirm critical values with us or the datasheet before ordering.

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