AP Series
DIN mount split core AC current sensors based on PRiME air-core technology.
AP Series – Split Core Current Transducers
The AP Series split‑core current transducers are designed for the measurement of AC currents from 10 A to 400 A, with ranges selectable via an integrated switch. Based on PRiME (Rogowski) air‑core technology, AP sensors provide accurate current measurement while enabling easy installation around existing conductors thanks to their split‑core design.
AP sensors operate with RMS measurement and offer multiple selectable output options, including 0–5 V, 0–10 V, and 4–20 mA, depending on the variant. They feature a bandwidth of 30 Hz to 2 kHz, an 18 mm aperture, and are loop‑powered, simplifying integration in industrial and automation systems.
The AP Series is particularly suited for applications where stable AC waveforms are present and compact, flexible current measurement is required in energy and automation environments.
AP – Features & Benefits
Main characteristics
- RMS output for AC current measurement
- Split core design, allowing installation without disconnecting the primary conductor
- Selectable outputs, depending on the version:
- 0–5 V DC or 0–10 V DC (AP B10)
- 4–20 mA loop powered current output (AP B420L)
- Switch selectable measuring ranges
- DIN rail or panel mounting
- Insulating plastic case recognized according to UL 94 V0
Benefits
- Large aperture for cables up to 18 mm diameter
- High insulation between primary and secondary circuits
- No insertion loss
- Easy and fast installation
Typical applications
The AP Series is well suited for standard AC current monitoring in energy and automation systems, including:
- Automation systems: Analog current feedback for remote monitoring (e.g. motors) and software‑based alarms
- Panel meters: Simple integration for displaying current and power consumption
The AP Series is recommended where stable AC waveforms are present and RMS measurement provides sufficient accuracy.
LEM AP – Download & Technical Characteristic
| Product | Check stock | Document | Nominal value | Output Type | Secondary Nominal Signal Value | Op. Temperature |
|---|---|---|---|---|---|---|
| AP 50 B10 | Datasheet 3D | 10 A, 25 A, 50 A | Voltage | 0-5V | -20 to 60 °C | |
| AP 50 B420L | Datasheet 3D | 10 A, 25 A, 50 A | Current | 4-20mA | -20 to 60 °C | |
| AP 100 B10 | Datasheet 3D | 50 A, 75 A, 100 A | Voltage | 0-5V | -20 to 60 °C | |
| AP 100 B420L | Datasheet 3D | 50 A, 75 A, 100 A | Current | 4-20mA | -20 to 60 °C | |
| AP 200 B10 | Datasheet 3D | 100 A, 150 A, 200 A | Voltage | 0-5V | -20 to 60 °C | |
| AP 200 B420L | Datasheet 3D | 100 A, 150 A, 200 A | Current | 4-20mA | -20 to 60 °C | |
| AP 400 B10 | Datasheet 3D | 200 A, 300 A, 400 A | Voltage | 0-5V | -20 to 60 °C | |
| AP 400 B420L | Datasheet 3D | 200 A, 300 A, 400 A | Current | 4-20mA | -20 to 60 °C |
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