WCB-822A Microcomputer Factory Transformer Protection and Measurement Device

The WCB-822A microcomputer factory transformer protection and measurement device is one of the latest HELLO series products launched by Xuji. It is a high-quality and cost-effective integrated protection and measurement device provided by Xuji based on decades of successful experience in the manufacturing of secondary equipment in power systems. The WCB-822A microcomputer factory transformer protection and measurement device is mainly suitable for the protection and measurement of factory transformers, utility transformers, or grounding transformers in small grounding current systems or small resistance grounding systems with voltage levels of 3-10kV.

H. The quality of E, L, L, and O is a common feature of Xuji HELLO series products, as follows:

H: High quality includes:

High tech: Adopting on-site configuration technology (FCT) and visual software development technology (VLD).

High quality: Based on professional and mature software and hardware platforms, rich operating experience and fully validated principle algorithms, automatic testing as the premise, advanced R&D management concepts and R&D management tools as the means, to ensure the quality of each link in the R&D, production, and manufacturing processes, and provide users with high-quality products.

E: Easy, easy work includes:

Easy to use: With a user-friendly interface and a Windows like operation menu, it features a debugging guide system and a one click calibration function, making on-site debugging, maintenance, and calibration work easy.

L: Low, low consumption includes:

Low input cost: Different devices share plugins, reducing the cost of purchasing devices and spare parts reserves.

Low failure rate: Advanced detection technology and a comprehensive production quality assurance system greatly reduce product failures and minimize downtime for protected objects.

L: ReaLize, the implementation technology includes:

Platformization: The design of software and hardware adopts the idea of platformization, allowing protection devices of different voltage levels to share hardware platforms, and different hardware platforms to share software, reducing the need for future hardware and software upgrades and maintenance work.

Specialization: Research and development work in different fields is completed by professionals, integrating research and development results from different levels and fields through standardized interfaces, allowing users to fully enjoy high-tech products.

Modularization: Encapsulate all functional modules into flexible relays, and configure different flexible relays for different devices to complete their functions, enabling quick response to personalized needs of different users.

O: TechOlogy, patented technology includes:

VLD development technology: The VLD development tool is similar to a "PLC" development environment, in which all protection logic is composed of different visualized flexible relays, realizing the industry's dream of developing programs using relay protection languages.

Dual connector technology: Adopting the technology of rear plug-in dual connectors, the principle of complete separation of strong and weak electricity improves the electromagnetic compatibility of the device hardware.

1 Technical indicators

1.1 Rated data

a. Rated power supply voltage: DC220V or DC110V (specify when ordering)

b. Rated AC data: AC voltage: 100/3 V, 100V

Zero sequence voltage: 100V

AC current: 5A or 1A (specify when ordering)

High voltage side zero sequence current: 1A

Low voltage side zero sequence current: 5A

Rated frequency: 50Hz

c. Thermal stability:

AC voltage circuit: Long term operation of 1.2Un

AC current circuit: long-term operation for 2In

1s 40In

High voltage side zero sequence current circuit: long-term operation 2A

1s 40A

Low voltage side zero sequence current circuit: long-term operation 10A

1s 200A

d. Dynamic stability:

Half cycle: 100In

1.2 Device power consumption

a. AC voltage circuit: not more than 1VA per phase;

b. AC current circuit: When In=5A, each phase should not exceed 1VA; when In=1A, each phase should not exceed 0.5VA;

c. High voltage side zero sequence current circuit: not exceeding 0.5VA;

d. Low voltage side zero sequence current circuit: When In=5A, each phase shall not exceed 1VA; when In=1A, each phase shall not exceed 0.5VA;

e. Protection power circuit: During normal operation, it should not exceed 12W; during protection action, it should not exceed 15W.

1.3 Environmental conditions

a. Environmental temperature:

Work: -25 ℃ to+55 ℃.

Storage: -25 ℃~+70 ℃, relative humidity not exceeding 80%, indoor environment with no acidic, alkaline or other corrosive or explosive gases in the surrounding air, rain and snow proof; Under the limit value, no excitation is applied, and the device does not undergo irreversible changes. After the temperature is restored, the device should be able to work normally.

b. Relative humidity: The average maximum relative humidity in the wettest month is 90%, and the average minimum temperature in that month is 25 ℃ without condensation on the surface. When the maximum temperature is+40 ℃, the average maximum humidity does not exceed 50%.

c. Atmospheric pressure: 80kPa~110kPa (relative altitude below 2km).