Product Overview

The DVK pole-mounted reactive power automatic compensation device is mainly used for 6~10kV transmission lines. It can control the switching of parallel capacitors through an automatic controller according to parameters such as voltage, time, power factor, reactive power, etc., to improve line power factor, reduce line loss, and improve voltage quality.

How it works

The device is mainly composed of high-voltage capacitors, vacuum contactors, voltage transformers, protective current transformers, control units, lightning arresters, outdoor drop-out fuses, outdoor current transformers and other components.
Working principle: The DVVK controller calculates and processes the real-time voltage and current of the line collected by the voltage transformer in the box and the current transformer outside the box, and then issues an input or cut-off instruction to control the opening and closing action of the vacuum contactor, thereby realizing the switching of the capacitor. The outdoor drop-out fuse short-circuits the device. Once the device has a short-circuit fault, the drop-out fuse immediately blows to prevent the device fault from expanding and causing damage to the line.

product-662-646

Main parameters

Altitude	Altitude is not higher than 2000m (special requirements must be specified when ordering)
Ambient temperature	-25℃℃~ +45℃ (special requirements must be specified when ordering)
Ambient humidity	At 25℃, <90%
Anti-pollution level	Sub-grade
Rated frequency	50Hz
Measurement accuracy	0.5 grade
Installation environment	There is no severe mechanical vibration that affects the insulation performance of the device, no harmful gases and steam, no conductive or explosive dust
Voltage level	6kV or 10kV
Control method	Voltage reactive power control, power factor control, voltage control, time control, voltage time control
Protection function	With overvoltage, undervoltage, time-limited quick break, overcurrent, unbalanced current (including phase loss) protection
Display function	Can display line voltage, current, power factor, reactive power, capacitor switching status, etc. in real time
Recording function	Can record hourly data, action data, fault data, etc.
Communication method	With standard RS485 communication interface, GPRS remote monitoring and wireless monitoring can be realized
Capacitor discharge time	The capacitor is equipped with a discharge resistor. After the capacitor is disconnected from the power supply, it can drop from the peak of the rated voltage to below 75 volts within 10 minutes
Voltage transformer	6/0.22kv or 10/0.22kv
Reactance ratio of reactor	The appropriate reactance rate can be selected according to the actual situation, such as
Vacuum contactor life	100,000 times

Performance characteristics

●Real-time tracking and dynamic compensation Realize the combination of static and dynamic, multi-level automatic switching, so that the reactive power compensation of high-voltage lines is more refined. The combination of static and dynamic is adopted to achieve the best cost performance while meeting the requirements.
●Flexible control mode has five control modes: voltage reactive power, voltage, reactive power, time, and voltage time. Users can choose the most appropriate control mode according to the actual situation of the line to achieve the best energy saving and loss reduction effect.
●Complete protection function It has protection functions such as overvoltage, undervoltage, time-limited quick break, overcurrent, and unbalanced current (including phase loss), which provides a strong guarantee for the reliable operation of the device.
●Convenient parameter monitoring and communication It has a standard RS485 communication interface, which can realize GPRS remote monitoring and wireless monitoring. The wireless communication distance is greater than 500 meters (without obstacles), and the complete switching data and hourly data records are convenient for users to analyze the operation status of the line and equipment.
●Convenient and flexible installation and configuration can realize single-pole installation and double-pole installation. When used with SVR (feeder automatic voltage regulator), it can become a pole-mounted voltage and reactive power integrated control station.