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Rishabh ELR Digital Earth Leakage Relay

Rishabh ELR Digital Earth Leakage Relay

Brand
Rishabh
Model number
ELR

Digital earth leakage relay with one CBCT input: 30 mA - 30 A trip setting, pre-alarm, CBCT open detection, 4-digit LED display, last 15 faults stored; DIN rail or 96 x 96 panel.

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Key features

  • Single CBCT input; leakage monitoring in 1 and 3 phase systems
  • 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

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
Accuracy
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
Settings
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
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 - 4000 (1 CO), 4001 (1 CO + 1 CO), 4002 (2 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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