2-21010-5

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The 2-21010-5 is an anodic protection relay with one alarm contact, one indication and one analog output. It is mainly used for controlling corrosion in electrochemical systems, as well as for other industrial applications. The main components of the 2-21010-5 are a microprocessor, a display, a current driver, 2 galvanic cathodes and a control module.

2-21010-5 Application Field and Working Principle:
The 2-21010-5 has several different applications, primarily related to the management of corrosion in industrial electrochemical systems. These include:

• Control of Anodic Protection (CP).
• Automated CP systems.
• High Impedance CP Systems.
• Data collection for plant monitoring/tracking.
• Protection of metal structures from corrosion.
• Cathodic monitoring and protection systems.

The 2-21010-5 relay uses particle beam (or bubble) technology to drive a load current, which controls the cathodic protection system at the desired potentials. Initially, the relay measures the internal potential of the system and then compares this value with the preset potential limits. If the current system’s potential is not within the preset limit, the relay will activate the current driver, controlling the cathodic protection to the instructed values. The relay also continuously monitors the system and sends out alarm signals in case of voltage drift or poor cathode system performance. Additionally, the relay can also be used as a data collection device, to collect and display values such as internal resistance, current and voltage.

The 2-21010-5 relay is a combination of standard and specific components. It is composed of a current driver, an analog I/O, and an alarm contact. The current driver circuit will regulate the current flow to the cathode and the analog input/output bank will monitor the internal potential of the system. The relay can be programmed to either trigger an alarm or execute a shutdown should the internal potential drift beyond the preset limit. It also has the ability to adjust the current limited on the cathode, the number of relays and their corresponding limits, and the output range of the analog output.

In summary, the 2-21010-5 is a powerful and versatile tool for efficient management of corrosion in electrochemical systems. It is reliable, robust and easy to install, and it offers several automated solutions that provide greater control and reliability. The relay is suitable for both industrial and commercial applications, and it has been thoroughly tested and verified to operate in a wide range of environmental conditions.

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