LEM
United States

LEM USA Inc.

11665 West Bradley Road
Milwaukee, WI, 53224
アメリカ合衆国

CDT series

CDT is an automotive grade leakage current sensor family from LEM also called Residual Current Monitoring (RCM) or Residual Current Detection (RCD) class B and B+, dedicated to DC, AC and AC+DC leakage current measurement.

CDT series

CDT family has been designed to achieved best in class performances, measuring and detecting as low as 5 mA DC or AC leakage. Sensor family is suitable for various AC charging applications:

  • AC wallbox
  • ICCPD (charging cable)
  • None isolated On Board Charger (OBC) 
  • V2G: Vehicle to Grid
  • V2L:  Vehicle to Load

The CDT sensor family give you the choice of having single or three-phase versions as well as safety version in the same housing and provide fast digital tripping output when leakage current is detected.

MAIN CHARACTERISTICS:

  • Fluxgate Open loop current transducers
  • RCD Class B (CDT) and B+ (DCDT)
  • Single or three-phase versions
  • Supply voltage 5 V
  • SPI output
  • Digital tripping output
  • Very high accuracy ±0.5 mA 
  • Very Low Thermal Offset drift
  • Tripping signal for Fast reaction time
  • Reinforced galvanic insulation
  • 40A RMS per primary conductors
  • +/-300 mA leakage current measurement range
  • Test winding
  • Automotive qualified -40 to +105 °C
  • Safety ISO26262 qualified: ASIL B ready (SF version)

FEATURES:

  • 4 primary conductors compatible with three-phase and single-phase On-Board Chargers
  • Maximum RMS primary current per primary conductor of 40 A RMS
  • Unipolar +5 V DC power supply
  • Primary current measurement range: ±300 mA DC
  • Frequency bandwidth up to 2 kHz (CDT version), and up to 100kHz (DCDT version)
  • Operating temperature range: −40 °C < T < +105 °C
  • Test winding
  • SPI and digital tripping outputs
  • Compact design for PCB mounting
  • IEC 62752 / UL 2231 / VDE 0664-400 (up to 100 kHz)

Download

Product Standard Max primary current (ARMS) Leakage Measuring Range (ADC) Primary Conductors Bandwidth (Hz) Tripping signal (leakage threshold) Document
CDT(SF)

IEC62752,
UL2231,
(ISO26262)

40/80

±300 mA DC

up to 4 DC - 2 kHz Adjustable/ Factory set

Datasheet

Application note

DCDT(SF)

IEC62752,
UL2231,
VDE 0664-400,
(ISO26262)

40/80

±300 mA DC

up to 4

DC-2kHz

47Hz-100kHz

Adjustable/ Factory set

Datasheet

Application note

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