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Application relay
DSP-IRM Power Line Insulation Resistance Measurement Relay/Panel Flush Mounting Type
Power Line Insulation Resistance Measurement Relay/Panel Flush Mounting Type
Main Feature
  • Panel Flush Mounting Type
  • Access restricted to authorized operator : Password
  • Mini compact size, convenient installation with 8pin socket → very useful to have a maintenance for aged motor control panel
  • Measurement ,Indication and Alarm for power line insulation resistance through 500VDC directly
  • The followed condition for the safety shall be satisfied to measure
    • Input P1-P2 must be closed state through Aux “b” output of MC(Magnetic Contactor) to control a motor and/or “b” output of MCCB to prove power-off state of motor
    • Earth terminal “E” and 500VDC output terminal “L” connected with “b” aux output of MC must be composed with closed circuit → refer application sequence diagram
  • Indication for measured insulation resistance during motor stop state
    • the latest measured value is shown
    • the output for alarm comes out if the measured value is lower than preset
    • the confirmation for stored measurement value
      • the measured value and the stored order is shown alternatively
      • the latest among 8 stored measured value is shown firstly as turned on #1 LED
  • Indication for measured insulation resistance during motor run state
    • OPEN” LED is turned on
    • the latest measured value is indicated
  • Preset mode concerned with insulation resistance measurement :IrAL,rEcd,rEnb,Auo,cLas,1st
  • Indication for measured value
    • the latest is shown while the measured action is not executed and is able to check the rest of 8 stored value as controlling “UP” and “DN” key,but “nonE” is shown if there is stored no more
    • “IrPS” is shown over 3500MOhm which means “very good”
    • measured value under 50KOhm is assumed Zero
    • “Ir-0” is flickered if measured value is 0(zero)
  • Safety condition to measure insulation resistance
    • Critical condition: Input P1-P2 must be closed state through Aux “b” output of MC(magnetic Contactor) to control a motor
      • “oPEn” LED is turned on if it is open state and the measurement is not possible
      • Operator needs to check wiring state.
  • Additionally.“b” output of MCCB to confirm power-off for motor shall be connected with serial connection to MC if possible
  • 500VDC output terminal “L” connected with “b” aux output of MC and earth terminal “E” must be composed with closed circuit → refer application sequence diagram
  • Optional choice: to make motor not to start as making serial connection with output of R1-R2 to MC coil→ in this case, it is recommend to use external aux relay
  • Self-diagonostic : output of R1-R2 is energized as pressing "CLR" key for 3sec → reset is done as pressing “CLR” key once more
  • It is possible to send the latest measured value through RS485 communication
Technical Specification
  • Control Power
    • 100VAC~240VAC, 50/60Hz(90VDC~ 370VDC)
    • 24VAC/DC(Optional)
    • Insulation Resistance measurement Range : 0.1MOhm ∼500MOhm
  • Tolerable Rate
    • R≤1M : ±0.05M
    • 1M＜R≤50M : ±5%(avg)
    • 50M＜R≤200M : ±10%(avg)
    • 200M＜R＜500M : available range
  • Alarm/Measurement output :R1-R2/1a(1-SPST), 3A/Resistive
  • Application Environment
    • operation : -25℃ ~ +70℃
    • Storage : -40℃ ~ +80℃
    • Humidity : 30 ~ 85%, non-condensing
  • Insulation Resistence/IEC-60255-5 : circuit-case, 100Mohm 이상, 500VDC
  • high Voltage Withstand Test/IEC-60255-5
    • circuit-case : AC 2000V, 60Hz, 1 min
    • contact-contact : AC 1000V, 60Hz, 1min
  • Lightning Impulse Voltage Withstand Test)/IEC-60255-5
    • Circuit-Ground, Circuit-Circuit : 1.2/50 uS, 5KV
    • Control Circuits : 1.2/50uS, 3KV
  • 1 MHz MHz Burst Immunity Test/IEC 60255-22-1:2.5KV, Positive/Negative under 2sec
  • Electrostatic Discharge /IEC-60255-22-2
    • Air : Level 3, 8KV
    • Contact : Level 3, 6KV
  • Radiated Electromagnetic Field Disturbance/IEC-60255-22-3 : Level 3, 10V/m
  • Electric Fast Transient Burst/IEC-60255-22-4 : Power relay output /Power source, Level 4, 4KV
  • Surge Immunity test/IEC-60255-22-5 :Relay output :1.2X50uS,2KV((0°, 90°, 180°, 270°)
  • Conducted Disturbence Test/IEC-60255-22-6: 10V, Level 3
  • Digital Communication
    • Physical : 2 wire RS 485
    • Address : 1 ~ 250
    • Speed : 9.6/19.2/38.4/57.6/76.8/115.2kbps
    • Connection : Input/Output : Screw Terminal
    • Termination resistance : it needs to use external resistance with 120 Ω
    • Cable : Sheathed 2 Pair
  • Power Consumption : 4W max
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  • IR.png
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