CDTL-I Series
Residual Current Monitor Type B for AC Wallbox
CDTL – Leakage Current Sensors for AC Wallbox
The CDTL‑I is LEM’s next-generation industrial residual current monitor for AC wallbox and off-board charging applications.
Drawing on LEM’s expertise in magnetic and electrical circuit design, the CDTL‑I delivers high performance, reliability, and safety. Its proprietary fluxgate technology provides highly accurate detection of both AC and DC leakage currents, with an ultra-low offset of ≤ 0.5 mA.
The sensor also offers excellent common-mode rejection, ensuring immunity to 50/60 Hz interference and reducing the risk of false tripping. Together with LEM’s advanced triggering algorithm, it complies with IEC 62752, IEC 62955, and UL 2231, enabling fast and dependable fault detection.
Designed for industrial use, the CDTL‑I supports up to four conductors with currents of up to 48 Arms each, making it suitable for both single-phase and three-phase systems. Its optimized design ensures accurate leakage current monitoring across a range of configurations.
CDTL – Features and benefits
Main characteristics
- AC and DC residual current detection (Type B)
- Dual tripping outputs and analog error signal
- Integrated test function and PWM output
- Configurable versions for various conductor setups
Benefits
- High accuracy and ultra-low offset for enhanced safety
- Fast and reliable tripping performance
- Robust against electrical noise and disturbances
- Compact PCB-mount design with reinforced insulation
- Wide temperature range from -40°C to +105°C
Typical applications
- Mode 3: AC wallbox charging stations
- Mode 2: In-cable control and protection devices (IC‑CPD)
Fully compliant with IEC 62752, IEC 62955, UL 2231, and EMC standard IEC 61851-21, the CDTL‑I ensures maximum protection against electric shock and fire hazards, making it the ideal choice for safe and reliable EV charging infrastructure.
LEM CDTL – Download & Technical Characteristic
Product | Residual Current range | Power supply | Accuracy | Op. Temperature | Bandwidth | Insulation |
|---|---|---|---|---|---|---|
| CDTL-I | ± 300 mA | +5 V DC | ± 0.5 mA @ 5 mA | -40 to 105°C | DC to 1kHz | 8.2mm |
CDTL Sensors – ASK FOR SAMPLES / QUOTATIONS
Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.