Product Name: DZX series on load tap changer online oil filter

Product Overview:

The DZX transformer on load tap changer online oil filter is mainly used for bypass circulation filtration of insulation oil for 35KV~500KV transformer on load tap changers. It can filter the switch oil regularly when the transformer system is running normally, or automatically filter the switch oil after the voltage regulating switch is activated. The online oil filter can effectively remove free carbon, moisture, oxides, and impurities from the oil during cyclic filtration, ensuring the oil quality and insulation strength of the switch oil, increasing the switching frequency of the switch, extending the maintenance cycle, reducing the number of power outages, ensuring voltage quality, and improving the safety and reliability of the on load tap changer operation.

The DZX series transformer on load tap changer online oil filter is usually permanently installed near the on load tap changer (installation methods include wall mounted or side fixed), and is used as a dedicated equipment with multiple flow rates and different functional accessories to choose from. It is an energy-saving, consumption reducing and environmentally friendly product.

Product features:

Integrated oil circuit, embedded structure, dual channel seal, no leakage!

● Fully digital control, LCD display, equipped with function keys, convenient!

High precision filtration, online oil injection, and tile wire venting, practical!

Sampling before and after filtering, visual window, fault display, intuitive!

Intelligent temperature and humidity control, multiple protections, remote monitoring, reliable!

Stainless steel material, standard control box, all-weather box body, durable and long-lasting!

Remote monitoring system, displaying the operating status and filter status.

Motor forward and reverse control, motor starting overload, phase loss protection device.

Configure temperature relay, adjustable from 50% to 100%.

The tap changer automatically starts the oil filtration device every time it is activated, and the operating time can be set according to needs. The oil filtration time is generally set to 30 minutes (0-99 hours); Another way is to filter at regular intervals every day, with a running time generally set at 2 hours. These two running modes can be selected separately.

Optional devices:

Configuration selection: A. Fully imported components; B、 Joint venture components

Material selection: 1. Stainless steel polishing; 2. Carbon steel baking paint

Function selection: A. Automatic/Manual/Timer; B、 Manual/timed

Installation method: 1. Wall mounted; 2. Side standing installation

Execution standards:

DL/T574-1995 Guidelines for Operation and Maintenance of On load Tap changers

Guidelines for the application of on load tap changers (GB10584-1989)

Product advantages:

1. Integrated oil circuit

All components are embedded in the CNC molded integral precision oil circuit. The structure is compact, with no internal pipeline connections, reducing the number of sealing parts, and all main sealing parts are designed with two seals. The stainless steel flanged hose is directly connected to the flange of the on load tap changer inlet and outlet of the transformer, which is convenient and reliable.

2. High precision secondary separation and filtration

Design a two-stage separation filter, with a 1 μ m filter element used in the front stage to remove metal particles such as free carbon impurities, and a high-performance active adsorption material embedded in the rear stage filter element to remove moisture, organic acids, and other substances, ensuring that the insulation oil maintains good pressure resistance characteristics.

3. Fully digital control

Adopting high-performance embedded dedicated digital controllers. Unique control algorithm, strong electromagnetic anti-interference design, stable and reliable operation.

4. Simple and intuitive human-machine interface

LCD display, Chinese menu, convenient commonly used function keys, user-friendly human-machine dialogue, intuitive and easy to understand interface, no need for memory, simple operation.

5. Multiple protections for circuit overflow and pressure detection

The system is equipped with an overflow valve and pressure detection pressure limiting function; When the outlet pressure is higher than the opening pressure of the relief valve, the oil forms a circulation inside through the relief valve. If the overflow valve fails, pressure detection can also serve as a pressure limiting protection to stop the motor and protect the system. The suction port of the pump is equipped with a pressure sensor to prevent the motor from starting and damaging the oil pump when the inlet valve is not opened.

6. Intelligent temperature and humidity control

When the temperature is lower or higher than the set value (suitable temperature setting is 0-40 ℃), the system automatically heats up or dissipates heat, ensuring reliable oil filtration in various harsh temperature and humidity environments, and achieving all-weather unmanned monitoring and operation mode.

7. Online gas release

During equipment inspection, the inspection personnel directly release the gas inside the tap changer through the gas online release mechanism of the oil filtration system itself.

8. Online refueling technology

When the oil level of the on load switch decreases during long-term operation, qualified insulation oil of the same model can be added to the on load tap changer body through the oil filling mechanism of the oil filtration system itself.

9. Power phase sequence and voltage detection interlock protection function

When the power phase sequence is incorrect or the voltage is higher or lower than U=380V (increased/decreased by 10%), the system automatically locks and the motor stops running.

10. Automatic alarm locking function

It has self diagnostic and maintenance alarm functions. When an alarm is displayed, the system automatically locks and cannot be started. After the fault is eliminated, it automatically returns to normal. If the filter element is clogged, the staff should clean or replace it in a timely manner before starting the oil filtration system.

11. Power off memory saving function

When power is lost, the set parameters and operating data can be automatically saved and memorized.

Product parameters: