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    High-voltage current-limiting fuses are critical protection devices designed to safeguard electrical equipment from overcurrents and short circuits. They operate by rapidly interrupting excessive currents, ensuring the safety and reliability of power systems.Compliant with IEC 60282-1.     High Voltage Fuse
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    Our High-Voltage Protection and Detection Series offers a comprehensive range of devices designed to ensure the safe and reliable operation of high-voltage electrical systems up to 40.5kV. Tested with ilac-MRA / CNAS approved authority.     Switchgear Protection
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    We offer fully sealed oil-immersed transformers and epoxy resin cast dry-type transformers, both of which combine excellent electrical performance with long-term operational stability, are capable of operating reliably under a wide range of demanding conditions, and fully meet the varying requirements for reliability and environmental adaptability in power distribution and various industrial applications.     Transformer Series
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    FUYI is also a leading manufacturer of medium and high voltage cable connectors and accessories for power distribution applications. Our product range includes single-phase or three-phase insulated cable connections to equipment such as transformers, switchgear, and branch boxes via premoulded connectors.Type-tested and certified by accredited authorities, fully complying with IEC 60502-4.     European Cable Termination
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Switchgear Protection

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Live Display & Fault Indicator

Switchgear protection devices – live displays, fault indicators, temperature controllers, smart dehumidifiers. 100% tested. Reliable monitoring and protection.

 

  • Live displays provide visible voltage presence indication
  • Fault indicators quickly locate short circuit or ground faults
  • Smart dehumidifiers protect enclosures from moisture damage
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CATEGORIES
Insulation Parts
CT/PT Transformers
Surge Arresters
Medium Voltage Fuse
Switchgear Contacts
Cable Accessories
Switchgear Protection
Switchgear Devices
Transformer Series
European Cable Termination
Post Insulator Wall Bushing Plug-in Bushing Contact Box
Current Transformer Potential Transformer
Lightning Arrester Over Voltage Protector
Fixed Contact Tulip Contact Contact Arm Flat Contact
Auxiliary Switch Cable Clamp
Indoor Disconnectors Load Switches Vacuum Circuit Breakers Fully Enclosed Gas-Insulated Switchgear Box Type Outdoor Prefabricated Substation High Voltage Switchgear Series Low Voltage Switchgear Series
Temperature Controller
FYK FY-WK(TH)
Temperature Controller
Condensation & Temperature Controller
FYK FY-NWK-M(TH)
Condensation & Temperature Controller
Dual-Channel Intelligent Digital Temperature & Humidity Controller
FY-WK-SX
Dual-Channel Intelligent Digital Temperature & Humidity Controller
Intelligent Digital Single-Channel Temperature & Humidity Controller
FY-WK-SX
Intelligent Digital Single-Channel Temperature & Humidity Controller
DXN-T(Q) Indoor High-Voltage Voltage Indicator (Live-Line Indicator)
DXN-T
DXN-T(Q) Indoor High-Voltage Voltage Indicator (Live-Line Indicator)
L-6/T & L-6/Q (with Switch) Indoor High-Voltage Voltage Indicators
L-6/T (L-6/Q with Switch)
L-6/T & L-6/Q (with Switch) Indoor High-Voltage Voltage Indicators
DXN8D-T(Q) Indoor High-Voltage Presence Indicating Device with Voltage Detection
DXN8D-T(Q)
DXN8D-T(Q) Indoor High-Voltage Presence Indicating Device with Voltage Detection
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Access Fuyi's technical documentation and FAQs to help you quickly select the right model and install with confidence.
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FAQ Related To Insulators
What is the primary function of a Live Display Indicator? Does its presence mean that manual voltage testing is no longer necessary? Expand
The core function of a Live Display Indicator is real-time early warning. It extracts signals from the high-voltage circuit via capacitive sensors and provides a visual indication of whether each phase is energized using LEDs. Safety Warning: It serves as a continuous visual status monitor for operators. Crucial Note on Safety Protocols: No, it cannot replace manual voltage testing (verification). According to standard electrical safety procedures, a Live Display is considered a
What is the purpose of the Expand
This is the most critical safety feature of the Live Display Indicator. When the high-voltage side is energized, the internal relay of the indicator will trigger, cutting off the power supply to the interlock circuit.  Logic Function: By interrupting the interlock circuit, the device physically prevents the operation of the earthing switch or the opening of the cabinet doors while the system is live. Forced Safety: This ensures
If the secondary control power (low-voltage power) of the switchgear is lost, can the Live Display Indicator still show the energized status? Expand
Yes, it can. The
Can a 10kV Live Display Indicator be used directly on a 35kV switchgear cabinet? Expand
No, it cannot. Although the display panels may look similar on the outside, the accompanying sensors (capacitive post insulators) are strictly matched according to the specific voltage level. Voltage Matching: The sensors for a 10kV system are designed to extract a specific signal ratio. Using them in a 35kV environment would subject the internal capacitors to excessive voltage stress, leading to insulation breakdown, sensor damage, or even catastrophic failure. Accuracy and Safety: A mismatched sensor will not provide an accurate signal to the display unit, which could result in a false
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25+ years as a manufacturer focused on medium & high voltage switchgear components.

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