XLW Series Passive Zero Flux Leakage Current Sensor
XLW Series Passive Zero Flux Leakage Current Sensor XLW Series Passive Zero Flux Leakage Current Sensor XLW Series Passive Zero Flux Leakage Current Sensor

XLW Series Passive Zero Flux Leakage Current Sensor

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With the development of high-voltage power equipment insulation monitoring technology, micro-current (mA, micro-amp level) sensors are more and more widely used, while single-turn feed-through micro-current sensors have no effect on equipment wiring due to their primary and secondary isolation. It has become the first choice for sensors for online monitoring of high-voltage equipment insulation. For this kind of current sensor, it is required to have high accuracy, good anti-electromagnetic interference capability and long-term stability. The traditional passive sensor cannot guarantee the accuracy and stability of the phase transformation error, and it is difficult to meet the requirements. The micro-current sensor using active zero-flux technology has the above excellent performance, and can accurately measure the leakage current of high-voltage equipment such as transformers, current transformers, voltage transformers, coupling capacitors, and arresters.

BNWXLW series passive zero-flux leakage current sensor is a micro-current sensor specially developed for on-line monitoring of high-voltage electrical equipment insulation. The material with high initial permeability is selected as the iron core, and the multi-layer metal shielding measures are adopted to adapt to the negative feedback technology circuit of the customer's PCB, which can automatically compensate the iron core and make the iron core work in an ideal zero magnetic flux state. The sensor can accurately detect the power frequency current of 100μA-700mA. The phase transformation error is not greater than 0.01°, and it has good temperature characteristics and electromagnetic field interference ability, which fully meets the accuracy of equipment sampling under complex power station field interference.

Product Feature

It can accurately measure μA-level current, with high measurement accuracy and good linearity;

Multiple shielding, strong anti-interference ability, can work in complex environment;

Optional socket output or aviation plug output;

Special waterproof and anti-corrosion metal shell, epoxy resin potting, can work outdoors for a long time.

Scope of Application
On-line monitoring of substation equipment: on-line monitoring of transformer core grounding; on-line monitoring of high-voltage bushing insulation; on-line monitoring of metal zinc oxide arrester insulation; on-line monitoring of current, voltage transformers and capacitors; high-voltage live display.
Electrical Symbol Performance parameters Small Signal Measurement
(Match client circuit)
Large Signal Measurement
I N Rated Input 500mARMS 10ARMS
IP Measurable Range 0.1mA-1A 0.1-20A
IOUT Rated Output 10mARMS 10mARMS
X Accuracy@IPN 0.05% 0.2%
εL Linearity ≤0.05% ≤0.2%
Uc Supply Voltage Client Circuit customization /
VOff Offset Voltage 1mV /
IC Max Power Consumption 10mA /
f Operating Frequency 50-400 Hz
TA Operating Temperature -40℃… +85oC
TS Storage Temperature -40℃…+100oC
Shell Metal Shell Output Mode Socket block/shielded wire
Metal Core Material Nanocrystalline/Permalloy Seal Flexible Silicone & Epoxy
Magnetic Screen Structure Carbon Steel/Permalloy Construction Plan Base Installation Fixed
Product selection (specification, shape, installation dimension, socket/lead definition)
Product image Model NO. Specification Outline Installation Drawing

XL-2  95-48-110(φ42)
BNWXLW-42 10mA/50μA

XL-4  60-125-105-45(φ60)
BNWXLW-60 10A/10mA
BNWXLW-60 10mA/10uA
Product Image Model NO. Specification Outline Installation Drawing

XL-7  26-55-60-35(φ26)
BNWXLW-26A 10mA/10μA
BNWXLW-26A 20mA/20μA

Note: can be customized according to customer requirements (through hole diameter, external dimensions, parameter transformation ratio)

We are a manufacturer has export qualification and experience.

instrument type at least 100pcs ;others by 1 -5 pcs;


Instrument transformer 20 thousand pcs ;current transformer 12 thousand pcs ;voltage transformer 11 thousand pcs.

We have a R&D team for new product design. Successful cases and in continued cooperation. Discussion among both sides ➡general specification ensure➡structure drawing ➡original sample ➡electrical

Standard Carton Export fumigatin-free tray Tray Film Edge fixing strip Vacuum packaging acceptable Customize size acceptable
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