AK & AKR
AC Current range from 2A to 200A selectable by a jumper
AK & AKR - Split-core current transformers
The AK and AKR current transducers are precisely engineered for the electronic measurement of AC waveforms current, ensuring galvanic isolation between the primary (High power) and secondary circuits (Electronic circuit). Covering a range from 2A to 200A, selectable by a jumper, these current transformers are primarily intended for panel mounting (with a DIN rail version available upon request).
While both product series offer split or solid core options, the key distinction between the AK and AKR electronic parts lies in their RMS responding characteristics. The AK is configured with RMS measurement, whereas the AKR is designed for True RMS measurement. Additionally, the AK series is available in both current and voltage output, whereas the AKR is exclusively offered with current output.
Within this product family, the AKR 2000 C420L J stands out with its larger 76 mm diameter aperture, contributing to its specific applications.
The AK and AKR current sensors are split-core current transformers, utilizing air-core technology, and are specifically tailored for use in renewable energy and power supplies applications.
AK, AKR – Features and benefits
Features
- AC sinusoidal measurement for AK sensors
- Average responding
- Split core box or Solid Core
- Current or Voltage output
- Self-powered or Loop powered transducers
- Panel mounting
- Jumper selectable ranges
The standout feature of AKR sensors lies in their ability to measure VFD (Variable Frequency Drive) and SCR (Silicon Controlled Rectifier) waveforms in current. Additionally, these sensors are equipped with True RMS Responding capabilities, ensuring accurate measurements in complex waveforms commonly associated with VFDs and SCRs.
Main characteristics
- Large aperture
- High isolation between primary and secondary circuits
- Easy to mount
Typical applications of the AK & AKR Series
The AK and AKR sensor family is versatile and well-suited for various applications in renewable energy and power supply systems, including:
- Automation Systems: Analog current reading for remote monitoring (e.g. motor)
- Data loggers: Self-powered transducer does not drain data logger batteries.
- Panel meters: Simple connection displays power consumption
Additionally, the AKR current transformers can fulfill specific application requirements such as:
- VFD Controlled Loads: VFD output indicates how the motor and attached load are operating.
- SCR Silicon Controlled Loads: Accurate measurement of phase angle fired or burst fired (time proportioned) SCRs.
- Switching Power Supplies and Electronic Ballasts: True RMS sensing is the most accurate way to measure power supply or ballast input power.
Furthermore, the AKR 2000 C420L J electronic part, with its unique features, is specifically designed for applications in:
- Large Pumps: Detect dry run electronically
- Generation: Measure the output of generators
- Electric Heating Elements: Monitors heater load (Faster response than temperature transducers)
LEM AK & AKR – Download & Technical Characteristic
| Product | Order | Document | Primary nominal RMS voltage | Supply Voltage | Op. Temperature |
|---|---|---|---|---|---|
| AK 5 B420L | Datasheet | 2 A, 5 A | Loop Powered | -20 to 50 °C | |
| AK 5 C420L | Datasheet | 2 A, 5 A | Loop Powered | -20 to 50 °C | |
| AKR 5 B420L | Datasheet | 2 A, 5 A | Loop Powered | -20 to 50 °C | |
| AKR 5 C420L | Datasheet | 2 A, 5 A | Loop Powered | -20 to 50 °C | |
| AK 50 B10 | Datasheet | 10 A, 20 A, 50 A | Self Powered | -20 to 50 °C | |
| AK 50 B420L | Datasheet | 10 A, 20 A, 50 A | Loop Powered | -20 to 50 °C | |
| AK 50 C10 | Datasheet | 10 A, 20 A, 50 A | Self Powered | -20 to 50 °C | |
| AK 50 C420L | Datasheet | 10 A, 20 A, 50 A | Loop Powered | -20 to 50 °C | |
| AKR 50 B420L | Datasheet | 10 A, 20 A, 50 A | Loop Powered | -20 to 50 °C | |
| AKR 50 C420L | Datasheet | 10 A, 20 A, 50 A | Loop Powered | -20 to 50 °C | |
| AK 200 B10 | Datasheet | 100 A, 150 A, 200 A | Self Powered | -20 to 50 °C | |
| AK 200 B420L | Datasheet | 100 A, 150 A, 200 A | Loop Powered | -20 to 50 °C | |
| AK 200 C10 | Datasheet | 100 A, 150 A, 200 A | Self Powered | -20 to 50 °C | |
| AK 200 C420L | Datasheet | 100 A, 150 A, 200 A | Loop Powered | -20 to 50 °C | |
| AKR 200 B420L | Datasheet | 100 A, 150 A, 200 A | Loop Powered | -20 to 50 °C | |
| AKR 200 C420L | Datasheet | 100 A, 150 A, 200 A | Loop Powered | -20 to 50 °C | |
| AKR 2000 C420L J | Datasheet | 1000 A, 1333 A, 2000 A | Loop Powered | -20 to 50 °C |
AK, AKR Sensors – ASK FOR SAMPLES / QUOTATIONS
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