High Voltage Detection And Lcd Display Device (VDIS)
This high-voltage detection and display device (VDIS) has been developed by our company in response to user requirements. It features a clear LCD screen for real-time voltage status display and includes a test button on the panel, allowing users to verify that the display is functioning correctly.
To facilitate dual-circuit phase testing on-site, the device is equipped with dedicated phase test terminals on the indicator panel. It is suitable for indoor high-voltage electrical equipment with voltages ranging from 7.2 kV to 40.5 kV and frequencies of 50/60 Hz.
The VDIS employs a capacitive voltage divider for precise voltage detection and provides integrated three-phase continuous indication along with signaling contacts. For enhanced flexibility, the device can be optionally fitted with an adjustable capacitor to maximize functionality.
Important Safety Notice: The display of the VDIS alone cannot confirm that the system is de-energized. In case of any doubt, or when required by operational procedures, a voltage detector compliant with DL740 standards should also be used for verification.
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Product Details
Product Overview
The DXN8D-T50S/Q50S Voltage Detection and Indication System (VDIS) provides reliable high-voltage status indication for indoor medium-voltage switchgear. Designed for systems from 7.2kV to 40.5kV at 50/60Hz, the device uses LCD indication technology combined with capacitive voltage detection to help operators quickly identify live circuit conditions during switching, inspection, and maintenance operations.The unit is suitable for switchgear panels, ring main units, compact substations, and power distribution cabinets used in industrial, utility, and OEM applications. Its integrated three-phase continuous indication design supports safer daily operation and helps improve maintenance efficiency.
LCD Display and Status Indication
The VDIS adopts a clear LCD display interface that allows technicians to monitor voltage status directly from the panel. The device provides different indication modes according to the detected voltage level:
- No voltage indication when voltage is below 10% Un
- Partial indication during intermediate voltage conditions
- Full indication when voltage exceeds 45% Un
- Self-test confirmation through the front-panel test button
The built-in test button allows users to verify display functionality before operation, helping improve operational confidence during field inspections.
Phase Testing and Safety Functions
To support on-site maintenance and phase comparison, the indicator panel includes dedicated phase test terminals for dual-circuit phase testing. The Q50S lockout version also supports signaling contacts and interlocking functions for enhanced operational safety.
The system can work together with disconnectors, grounding switches, and capacitive sensors to provide accurate live-voltage indication in the primary circuit. This helps reduce the risk of incorrect grounding operations and unintended access to energized compartments.
Compact Design and Easy Installation
The DXN8D series is designed for fast front-panel installation in medium-voltage switchgear assemblies. Its compact structure helps manufacturers maintain a clean panel layout while simplifying wiring and maintenance procedures.
The product supports standard mounting dimensions and rear wiring configurations, making it suitable for batch production and OEM cabinet integration. Engineers can easily incorporate the device into switchgear production lines or retrofit projects.
Reliable Operating Performance
The device is designed for demanding indoor electrical environments and supports stable operation under the following conditions:
- Ambient temperature: -25°C to +65°C
- Altitude up to 2000m
- Relative humidity up to 95% daily average
- Suitable for pollution-free indoor environments without corrosive gas or salt mist
The capacitive voltage divider design provides stable voltage detection performance for long-term operation in medium-voltage distribution systems.
Applications
The DXN8D-T50S/Q50S VDIS is widely used in:
- Medium-voltage switchgear
- Ring main units (RMU)
- Compact substations
- Power distribution cabinets
- Industrial electrical systems
- OEM switchgear manufacturing
- Utility distribution projects
With stable indication performance, integrated safety functions, and flexible installation compatibility, the DXN8D series provides a dependable voltage indication solution for modern medium-voltage power distribution systems.
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our trust is our foundation. As a national high-tech enterprise, Xinyuan Electric has been committed to providing premium high-voltage switchgear components and "Five-Prevention" series products to global customers since 2004. We understand that selecting the right electrical accessories is crucial for the safe operation of your equipment. Our commitment is to serve you through the following:
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