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1. Overview
The outdoor high-voltage live display locking device is mainly used in .~ and above substations and power plants to forcefully lock the line-side grounding blades of tie lines between stations. , perform live body monitoring in complex power lines, and provide equipment operation monitoring signals for the power monitoring center in distribution network automation. The product is fully functional, safe and reliable, with flash display, audible alarm, self-test and forced locking circuit functions. It has obvious directionality, high sensitivity and reliability. The high-voltage live display locking device can detect whether the network (equipment) is live at a safe distance from the live equipment, and cooperates with anti-error devices such as electromagnetic locks, mechanical program locks, and microcomputer locks to implement forced locking. It is an ideal way to prevent electrical misoperation on outdoor electrical networks or equipment. The most ideal safety device.
2. Working principle
) This device uses the electric field coupling principle between the high-voltage electric field and the sensor to induce charge on the sensor and form a current signal. This signal is processed by the processor and drives the indicator light and latching loop. Since the sensor does not come into contact with electrified objects, it can perform inductive (non-contact) measurements from a safe distance. There is no need for power outage or partial discharge test during installation and maintenance. It is simple and convenient, with low maintenance cost and long service life.
) When the primary circuit under test is electrified, the three-phase indicator lights B and B flash, the unlock indicator light goes out, and a forced locking signal is output (the contacts are in normal state, and the microcomputer locking interface has no electrical signal output).
3) When the primary circuit under test is not powered, the three-phase indicator lights, B and B, are all off, the unlock indicator light is on, and the locking signal is released at the same time (the contact is transient, and the microcomputer locking interface has an electrical signal output), then Equipment operation is possible.
) This device adopts split-phase control. If any one phase is charged, it will flash an alarm and output a forced locking signal. When the display loses working power, the display will output a forced locking signal and maintain the locking state
3. Automatically timed Fault detection and self-test function
This device has the function of automatically detecting faults in a timely manner. When the sensor is open circuit, short circuit or the sensor cable is damp, the power indicator light flashes, the fault phase indicator light flashes, and a forced locking signal is output. Pressing the self-test button can automatically detect each functional module of the sensor and display. If the device is normal, the three-phase, B, and phase indicator lights will flash, the unlock indicator light will go out, and a forced locking signal will be output. If the device is faulty, the corresponding phase Light does not shine.
4. Anti-fouling level
The sensor has a fully sealed structure and is coated with R long-lasting anti-fouling flash coating. The circuit board has been treated with moisture-proof treatment. The display box and installation components are made of all stainless steel and are rain-proof and moisture-proof. , dustproof and rustproof. The protection is achieved and fully meets the anti-corrosion and moisture-proof requirements.
DXW type outdoor high voltage live display locking device