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The Latest CT Technologies

The Latest CT Technologies

The Latest CT Technologies
Contents Drawing(Click to enlarge)
(1)Current sensor for HEV inverter control
  • For control of inverter unit installed in HEV(Hybrid Electric Vehicle), low cost current sensor is under development.
  • GaAs type hole element is used for sensor.
  • Model DCT-500IT
 (1)Current sensor for HEV inverter control
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(2)Automotive current tester
  • Automotive current tester is under development to measure the operating condition of car battery.
  • It is possible to measure not only sleeping standby current but also load current during driving.
  • The special through hole type ZCT sensor is used and it is reported that no influence to batty is observed in field test.
 (2)Automotive current tester
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(3)Live line clamp insulation resistance tester
  • The live line insulation resistance measurements up to 10MΩis enabled without cutting off the power by super accurate ZCT sensor.
  • The insulation resistance for AC servo-motor is measurable under servo-lock condition.
  • Model MLIT-1
 (6)Live line clamp insulation resistance tester
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(4)DC leakage current sensor for solar power system
  • Very small DC current is measurable for solar power system without influence of external magnetic field and ambient temperature.
  • The development of new core material is necessary for achievement of required function.
  • Model DCZCT-20M
 (7)DC current ZCT sensor for solar power system
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(5)Flexible leakage current tester
  • This is new leakage current tester with flexible CT.
  • New flexible CT is less influenced from external magnetic field(1/10)compared with ordinary Rogowski type CT.
  • Model RLM-1
 (8)Leakage current tester with flexible CT
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(6)I0/I0r Leakage current tester with φ80mm CT window
  • True resistive leakage current (I0r) measurements without influence of external magnetic field and residual current is enabled by new CT technology.
  • φ80mm CT window enabled easy clamping of whole phase conductor for 3P/3W and 2P/2W power system.
 (6)I0/I0r Leakage current tester with φ80mm CT window
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(7)DC leakage current sensor with big CT window
  • High accurate DC leakage current sensor with big CT windows (φ45mm,φ60mm)for DC power supply system is under development.
  • New through hole type ZCT is less influenced from external magnetic field and residual current.
  • Model DCZCT-45NK
  • Model DCZCT-60NK
 (7)DC leakage current sensor with big CT window for DC power supply system
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(8)Split core type ZCTs
  • These are new split core type ZCTs used for the detection of AC leakage current.
  • Three kind of CT window (φ30mm , φ45mm , φ65mm)is available.
  • Model MZL-30/45/65
 (8)Split core type ZCTs
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