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Rishabh Relay V/Hz Line Monitoring Relay (Voltage and Frequency)

Rishabh Relay V/Hz Line Monitoring Relay (Voltage and Frequency)

Brand
Rishabh
Model number
Relay V/Hz

Digital line monitoring relay cum class 0.5 DPM: over / under voltage, phase failure, unbalance, incorrect sequence and over / under frequency protection, PT ratio programmable, 2 relays.

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Key features

  • Over / under voltage, phase failure (single phasing), phase unbalance and incorrect phase sequence protection
  • Over and under frequency protection
  • 4-digit ultra bright 7 segment LED display; trip relay cum DPM with class 0.5
  • True RMS measurement up to 15th harmonic
  • User selectable 1P2W / 3P4W / 3P3W network and phase sequence (123 or 321)
  • User selectable PT primary (100 V L-L to 1200 kV L-L) and PT secondary (100 - 600 V L-L)
  • Stores the last 15 faults
  • AND function: trip on any two fault conditions
  • Trip or buzzer mode
  • Auto / manual reset
  • Dual colour LED per phase plus relay 1 / relay 2 status LEDs
  • Configuration via USB-based PRKAB
  • Applications: standby generators and gensets (AVR monitoring), mains failure units, UPS change-over, voltage-sensitive motors, computer supplies

Specifications

Input
Nominal input voltage600 V L-L (346.42 V L-N)
PT secondary100 V L-L to 600 V L-L programmable on site
PT primary100 V L-L to 1200 kV L-L programmable on site
Max. continuous input voltage127% of PT secondary
Voltage burden< 0.6 VA approx.
Overload withstand2 x rated value for 1 s, repeated 10 times at 10 s
Measuring rangeVoltage 20 - 125% of PT secondary, frequency 40 - 70 Hz
Nominal frequency50 / 60 Hz programmable on site
Accuracy
Voltage / frequency±0.5% of nominal value / ±0.2 Hz
Delays±140 ms or ±5% of set delay, whichever is greater
Auxiliary supply
Higher aux60 V - 300 V AC/DC (nominal 230 V AC/DC, 50/60 Hz for AC)
Lower aux20 V - 60 V DC / 20 V - 40 V AC (nominal 48 V DC / 24 V AC)
Frequency45 to 66 Hz
Burden< 4 VA approx.
Settings
Phase failure20 - 85%
Voltage unbalance2 - 20%
Over / under voltage101 - 125% / 70 - 99%
Max. / min. frequency101 - 110% / 90 - 99%
Trip delays0 - 30 s (each fault)
Fault deactivationIndividual faults can be deactivated (not phase failure)
Reset delay0.2 - 30 s
Power on delay0.5 - 30 s
Reset optionAuto / manual
Relay control modeDe-energize / energize
Differential / hysteresis1 - 15%
Relay contacts
Types1 CO, 2 CO or 1 CO + 1 CO
Rating5 A / 250 V AC / 30 V DC (resistive load)
Mechanical endurance1 x 10^7 operations
Electrical enduranceNO 3 x 10^4, NC 1 x 10^4 operations (1 CO / 1 CO + 1 CO); 1 x 10^5 operations (2 CO)
Standards
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, pollution degree 2
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 - 90% non condensing
Shock15g in 3 planes
Vibration10 - 55 Hz, 0.15 mm amplitude
EnclosureIP20 (front face only)
Weight300 g approx.
Ordering
Order codeRISH Relay V/Hz - [1: single phase / 3: three phase] - [1000: 1 CO / 1001: 1 CO + 1 CO / 1002: 2 CO] - [HA / LA aux]

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

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