Charged display
DXN8D-11/T4S
DXN8D-11/QT4S DC24V
A live display is a type of safety device that is directly installed on indoor electrical equipment to visually display whether the electrical equipment has operating voltage. When the device has operating voltage, the display window of the monitor flashes to warn people that the high-voltage equipment is live, and there is no indication when there is no power.
This series of devices is generally installed on incoming busbars, circuit breakers, main transformers, switchgear, GIS composite appliances, and other places where it is necessary to display whether they are live or not, to prevent electrical misoperation. This series of devices must comply with the standard DL/T 538-2006 "High Voltage Live Display Devices" in the power industry of the People's Republic of China. Capable of reliability, economy, adaptability, and comprehensive functionality.
Working principle
This device utilizes the principle of electric field coupling between high-voltage electric fields and sensors to perform inductive (non-contact) measurements at a safe distance. Its working principle is shown in Figure 1. The high-voltage live display locking device consists of two parts: a sensor and a display. There are four sensors, which are aligned with the three-phase live bodies of "A, B, C, D" and the ground respectively. They have no direct contact with the high-voltage live body and maintain a certain safe distance. It receives the electric field signal of the high-voltage live body and transmits it to the display for comparison and judgment;
When the tested device or network is live, the "A, B, C" three-phase indicator lights are on, the "Operation" indicator light is off, and a forced locking signal is output.
When the tested device or network is not powered, the "A, B, C" three-phase indicator lights will turn off, the "Operation" indicator light will turn on, and the locking signal will be released, allowing for device operation. The device adopts phase separation control, and when any phase is charged, it flashes an alarm and outputs a forced locking signal.
When the monitor loses control power, it outputs a forced lockout signal to maintain the lockout state. The monitor is equipped with a "self check" function, which can automatically detect various functional modules of sensors and displays. In the event of any malfunction in the device, the "power" indicator light will remain on, the "operation" indicator light will not light up, and a forced locking signal will always be output to maintain the locked state.
A live display is a type of safety device that is directly installed on indoor electrical equipment to visually display whether the electrical equipment has operating voltage. When the device has operating voltage, the display window of the monitor flashes to warn people that the high-voltage equipment is live, and there is no indication when there is no power.
Equipment usage
This series of devices is generally installed on incoming busbars, circuit breakers, main transformers, switchgear, GIS composite appliances, and other places where it is necessary to display whether they are live or not, to prevent electrical misoperation. This series of devices must comply with the standard DL/T 538-2006 "High Voltage Live Display Devices" in the power industry of the People's Republic of China.
Equipment features
Reliability: Inductive (non-contact) sensors can detect whether the circuit is live beyond a safe distance, with obvious directionality, high sensitivity, and safety and reliability.
Economy: The sensor does not come into direct contact with the charged body, and there is no need for partial discharge testing during installation and maintenance. It is simple, convenient, has low maintenance costs, and has a long service life.
Fully functional: It has functions such as flash display, self check, and activation of forced locking circuit, truly playing the role of all-round forced locking.
Adaptability: With diverse forms, it can be widely used in various places such as indoor, outdoor, GIS combination appliances, and switchgear.
