CT0.1-P LEM | Alldatasheet
Document overview
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Technical content
Features
- DC & AC earth leakage current transducer using a flux-gate principle
- PCB mounting
- ±15V power supply
- ±5V output @ IPN
- Insulated plastic case recognized according to UL94-V0. Advantages
- Small size
- Bandwidth : DC .. up to 18kHz
- Response time better than 60 ms
- Cost effective, compact alternative to classical RCDs (Residual Current Device)
Applications
- Earth leakage detection in transformerless solar inverters
- 1st human contact protection of PV arrays
- Failure detection in power sources
- Symmetrical fault detection (e.g. after motor inverter)
- Current leakage detection in stacked DC sources
- Single phase or three phase differential current measurement up to ±30A per wire (DC or AC) Application Domain
- Industrial copyright protected 061017/9 www.lem.comLEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. Page 1/3
Current Transducer CT 0.1 .. 0.4-P Isolation characteristics Vb Rated isolation voltage rms 150 V rms with IEC 61010-1 standard and following conditions - Single insulation - Over voltage category III - Pollution degree 2 - Heterogeneous field Vb Rated isolation voltage rms 250 V rms with EN 50178 standard and following conditions - Reinforced insulation - Over voltage category III - Pollution degree 2 - Heterogeneous field Vd Rms voltage for AC isolation test, 50 Hz, 1 min 2.5 kV Ve Partial discharge extinction voltage rms @ 10pC > 1.2 kV Vw Impulse withstand voltage 1.2/50µ s 6 kV If insulated cable is used for the primary circuit, the voltage category could be improved with the following table : Cable insulation (primary) Category HAR 03 300V CAT III HAR 05 400V CAT III HAR 07 500V CAT III 061017/9 www.lem.comLEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. Page 2/3
061017/9 www.lem.comLEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. Page 3/3 12.6 17.8 11.0 4- 0.7 10.5 4.3 20.3 0.5 +Vcc -Vcc GND M MGND -Vcc+Vcc 5±2 2-F 2 2-F 5 Vout f 11 I ø 17.8 5±2 2-Ø5 2-Ø2 +Vcc -Vcc GND M M GND -Vcc +Vcc RL 4- 0.7 (NC) +Vcc M GND |Vcc Ip flux-gate DC transformer AC ± 0.3 ± 0.3 0.5±0.3 10.5 ± 0.3 Ø 11 Mechanical characteristics
- General tolerance ± 1 mm (Unless otherwise specified in the above drawings.)
- Aperture for primary conductor Ø11 mm
- Connection of secondary 4 pins 0.7 x 0.7 mm 2 Recommended PCB hole 1.2 mm
- PCB fixation 2 pins Ø2 mm Recommended PCB hole 2.2 mm Remarks
- VOUT is positive when IP flows in the direction of the arrow.
- This transducer induces into the primary circuit a square wave of 500Hz. This voltage can induce an AC current in the primary if the primary impedance is low.
- Primary impedance ≥ 10Ω CT 0.1-P CT 0.2-P CT 0.4-P VOUT by induced current ≤ ±0.5% ≤ ±0.4% ≤ ±0.2% of IPN
- Temperature of the primary conductor should not exceed 100°C. Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the following manufacturer's operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected.