FRS, FL - Open Loop Coreless Integral Sensors
Our brand-new FRS and FL product series are designed for the electronic measurement of DC, AC, and pulsed current with galvanic separation between the primary and secondary circuits.
The FRS current sensors allow the measurement of current up to 9000 A, while the FL sensors can reach up to 42 kA. Both product series are available with either a current output (4-20 mA) or an instantaneous voltage output (0-5 V).
The main difference between the two product series lies in the size of the sensor: FRS sensors feature a 104 mm aperture, whereas FL sensors are available with either a 200 mm or a 300 mm aperture width.
Utilizing OLCI (Open Loop Coreless Integral) technology, FRS and FL coreless transducers ensure reliable and accurate current measurements in industrial, traction, and trackside applications.
FRS, FL – Features and benefits
Features
- Hall effect Open Loop Coreless Integral current sensor
- Unipolar or Bi-polar measurement of primary current up to 42 kA
- Instantaneous 4-20 mA current output or Instantaneous 0-5 V voltage output
- Power supply +12 or +24 V DC
- Galvanic separation between primary and secondary circuit
- Factory calibrated
While they can ensure unipolar or bi-polar measurement of primary current up to 9000 A, FRS sensors also feature:
- High bandwidth > 1 MHz
- Very low delay time up to < 400 ns
Main characteristics
- Wide measurement range
- No magnetic offset
- Low consumption and low losses
- Wide range of rectangular busbar dimensions
- Light weight design
- M12 field connector
In addition, FL current sensors are available with two aperture widths: 200 mm and 300 mm.
Typical applications
Both FRS and FL coreless high current sensors, known for their ability to measure DC, AC, and pulse currents, are widely used in a variety of industrial areas, as well as in traction and trackside applications. Examples of these applications include:
- Wind turbine power converter
- Electrolyser
- High power drives
FRS & FL - Open Loop Coreless Integral (OLCI) current sensors
FRS, FL transducers - Standards compliance
| FRS, FL Series |
|---|
| IEC 62477-1: 2022 |
| IEC 61800-5-1: 2022 |
| IEC 62109-1: 2010 |
| IEC 61010-1: 2010 |
| EN 50155: 2021 |
| IEC 61992-7-2: 2006 |
| UL 61010-1: 3ED 2022 |
LEM FRS, FL – Download & Technical Characteristic
FRS Series
Product | Check stock | Document | Primary nominal RMS current | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| FRS 1000-S | 3D Datasheet User guide | 1000 A | 12 to 24 | -40 to 85°C | |
| FRS 1000-SBI | 3D Datasheet User guide | 1000 A | 12 to 24 | -40 to 85°C | |
| FRS 1500-SBI | 3D Datasheet User guide | 1500 A | 12 to 24 | -40 to 85°C | |
| FRS 2000-S | User guide | 2000 A | 12 to 24 | -40 to 85°C | |
| FRS 2000-SBI | 3D Datasheet User guide | 2000 A | 12 to 24 | -40 to 85°C | |
| FRS 2000-SUI | User guide | 2000 A | 12 to 24 | -40 to 85°C | |
| FRS 3000-S | 3D Datasheet User guide | 3000 A | 12 to 24 | -40 to 85°C | |
| FRS 3000-SUI | 3D Datasheet User guide | 3000 A | 12 to 24 | -40 to 85°C |
FL Series
FRS, FL Sensors – ASK FOR SAMPLES / QUOTATIONS
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