Breaker Data Adapter (BDA)

WL Circuit Breaker

System Requirements

Certain prerequisites have to be fulfilled before the BDA or BDA Plus can be operated. One of the two standard browsers (Internet Explorer V5.5 or higher or Netscape Navigator V6.2 or higher) must be installed on the output device (e.g. laptop). Compatibility with other browsers cannot be guaranteed.

To ensure independence between the operating systems and browsers, all the pages have been written in HTML code and Java applets. A Java Virtual Machine is required to display the pages.

What is Java?

Java is a platform-neutral object- oriented programming language originally developed by Sun Microsystems. Java is implemented in all IT areas of the commercial, industrial and administrative sectors, and is available free of charge for many operating systems and platforms – from cell phones to real-time mainframe systems.

Unlike most compiler languages, Java applets are not directly translated into a set of commands that can be understood by a "Real Processor". Instead, they are first converted to the "Java Byte Code". Although this byte code is highly machine-oriented, a "Java Virtual Machine" (VM), which emulates a standardized processor for all Java applets, is required on the target computer.

Since Java normally compiles data twice (once with the developer and once with the user), this principle is known as the “Just-In-Time “(JIT) Compiler. Although, Java applets take longer to start, since the machine code is generated during initialization.

However, the same Java applet can run on all supported systems without modifications.

The Java Virtual Machine V2 V1.4.0_01 is required to display the BDA pages. When these pages are called up for the first time, the BDA checks whether Java VM2 is available on the browser. If not, the system automatically displays a window informing the user of this and automatically links the user to the appropriate Sun Microsystems page. An Internet connection must be established to ensure the automatic installation procedure functions properly. If this is not the case, the Virtual Machine required for the Microsoft Windows operating systems can be downloaded from the following address:

http://java.sun.com/products/archive /j2se/1.4.0_01/index.html

Once installed, the option Java 2VM V1.4.0_01 must be activated in the browser (if it is not already).

To avoid conflicts with other Java versions, it is recommended that you uninstall older versions of Java and delete the cache in the browser.

The target system with the browser also requires one or both of the following communication interfaces:

•A serial interface with RS232 design, usually integrated on standard PCs (e.g. COM1) for point-to-point (PPP) communication with the BDA.

•A LAN interface for communicating with the BDA Plus via the Ethernet.

Circuit breaker requirements

The BDA can be connected to WL Circuit Breakers with the following trip units: ETU745, ETU748, ETU755 and ETU776. It can be connected either directly to the trip unit or to the last external CubicleBUS module. Circuit breakers can also communicate with the BDA if they have been retrofitted with the communication function.

Getting started with the BDA Plus

If the BDA Plus is is being installed for the first time, the settings for the IP address and the standard gateway as well as the subnet mask must be set using the serial communication via RS232. After this the BDA Plus must be rebooted to load the Ethernet driver with the specified parameters.

4/4

WL MODBUS Communication and Electronic Accessories • January 2005

Page 68 Page 70
Page 69
Image 69
Siemens UL 489, UL1066 specifications What is Java?, Circuit breaker requirements, Getting started with the BDA Plus
Page 68 Page 70

UL 489, UL1066 specifications

Siemens UL1066 and UL489 are essential components in the landscape of electrical equipment, specifically in circuit protection and control. These standards ensure reliability, safety, and efficiency in various applications, including industrial, commercial, and residential settings.

The Siemens UL1066 is primarily focused on disconnect switches. These devices are designed to isolate electrical circuits, ensuring the safety of both personnel and equipment during maintenance or in case of faults. One of the key features of UL1066 disconnect switches is their high breaking capacity, enabling them to handle significant fault currents without failure. This characteristic is crucial in protecting downstream equipment from damage caused by short circuits. The UL1066 switches are also known for their robust construction, often featuring a metal enclosure that enhances durability and environmental resistance. Additionally, these switches can be operated manually or remotely, offering flexibility in operation and control.

On the other hand, Siemens UL489 circuit breakers provide comprehensive protection against overcurrents and short circuits. These devices not only interrupt fault currents but also protect connected devices from damage due to overload situations. Key features of UL489 circuit breakers include adjustable trip settings, which allow users to customize the response to overcurrent conditions based on specific application requirements. This adaptability makes them suitable for a wide range of environments, from large industrial plants to smaller commercial buildings.

Both UL1066 and UL489 products are constructed with advanced technologies, such as thermal-magnetic or electronic trip mechanisms in UL489 devices, ensuring precise and timely interruption of fault currents. These technologies promote energy efficiency and stability within electrical systems. In addition, many of these devices are equipped with indication features, providing clear visual status cues for quick assessment in emergency situations.

In terms of characteristics, both UL1066 and UL489 devices adhere to rigorous testing and certification processes to meet UL standards. This compliance assures users of their performance and reliability. Furthermore, the devices are designed to accommodate a wide range of operating temperatures and environmental conditions, making them versatile choices for various applications.

In summary, Siemens UL1066 and UL489 devices are paramount in ensuring safety and efficiency in electrical circuits. Their advanced features and robust construction make them indispensable in protecting both personnel and equipment in an array of industrial and commercial applications.
Top Page Image Contents