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Transformer Core Ground Sensor(Closed Loop Cross-core Type)
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Transformer Core Ground Sensor(Closed Loop Cross-core Type)

TRXL-60W transformer core grounding sensor is specialized in supporting the client “transformer core and clamps grounding current monitoring device”, used to monitor the transformer core and clamps ground fault current, can be realized on the core grounding current continuous, online monitoring, through the monitoring of real-time monitoring of the insulation condition of the device, and can be Through monitoring, it can monitor the insulation condition of the equipment in real time, and can find out the faults such as internal insulation dampness or damage, core multi-point grounding, foreign matter in the box, oil sludge deposition in the oil tank, etc. in time. More importantly, it can provide reliable data basis for the state maintenance of such equipment.
Availability:
  • TRXL-60W

  • TR

Product Overview


Transformer is the key equipment of the power system, and its normal operation is vital to system safety. During operation, the alternating magnetic field generated by the windings through parasitic capacitive coupling, will make the core to the ground to produce suspended potential, resulting in the existence of potential difference between the internal components, which may lead to spark discharge, endangering the insulation. Therefore, the core must be single-point grounding to eliminate suspended potential.

If the core multi-point grounding, will form a closed loop loop current, resulting in local overheating, oil decomposition and insulation degradation, and in serious cases, burn the core, resulting in major accidents. Monitoring the core grounding current can be timely detection of such faults. The sensor used for this purpose is made of high permeability material, combined with deep negative feedback and multi-layer shielding technology, realizing fully automatic compensation of the iron core to zero magnetic flux state, accurately detecting 100μA-700mA industrial frequency current, and possessing excellent anti-temperature drift and anti-electromagnetic interference capabilities, ensuring accurate sampling in complex power station environments.


Product Features


*   The structure of copper rows is fastened through the center, and it is suitable for busbar with hole diameter φ60 or copper rows of 55mm×10mm.

*   Accurate measurement of μA level current with high measurement accuracy and good linearity.

*   Multiple shielding, strong anti-interference ability, can work in complex environments.

*   Optional shielded wire or aerial plug outputs are available.

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


Application


*   Transformer core grounding on-line monitoring.

*   High-voltage bushing insulation on-line monitoring.

*   Zinc oxide surge arrester insulation on-line monitoring.

*   Current and voltage transformer and capacitor on-line monitoring.

*   High-voltage charged display.


Through-core fastening copper bar structure, suitable for busbars with a diameter of φ60 or 55mm×10mm copper bars;

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 shielded wire 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 transformer core grounding; on-line monitoring of high-voltage bushing insulation; on-line monitoring of zinc oxide arrester insulation; on-line monitoring of current, voltage transformers and capacitors; high-voltage live display.


PERFORMANCE

Electric
Performance
Parameters

Electrical Symbol

Performance

Opened and closed lock

I P

Measurable Range

0.1mA~1A

V OUT

Rated Output

0~7Vrms

X

Accuracy @I PN

0.05%

ε L

Linearity

≤0.05%

Uc

Supply Voltage

±12V

V Off

Offset Voltage

1mV

I C

Maximum Power Consumption

10mA

f

Working Frequency

50-400 Hz

T A

Operating Temperature

-40oC… +85℃

T S

Storage Temperature

-40oC…+100℃

Mechanical
Structure
Parameters

Shell

Metal Shell

Output Mode

Shielded wire/waterproof navigation plug

Core Material

Nanocrystalline/Permalloy

Seal

Flexible Silicone & Epoxy

Magnetic Screen Structure

Carbon Steel/Permalloy

Construction Plan

Base Installation Fixed


Shape and Installation Dimensions


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