Substation Protection & Automation

Substations are the building blocks for any grid. Without adequate protection those substations can quickly come plummeting down and can adversely affect the grid. Unicorn in association with Schweitzer Engineering Laboratories (SEL) has been preventing that happening successfully with protection and automation systems connected over unassailable solutions that ensure highest interoperability. Modern digital substations can increase controllability and thus our Protection and Automation enables the digitalization of the grid so that our customers can improve reliability and ensure safe and clean energy supply to their consumers. Continues to lead the way making new protection, control and automation applications possible and thus our solutions continue SEL’s years long tradition of power system innovation.

In association with SEL, UNICORN specifies, designs, implements, tests, and commissions protection& automation systems for substations. Our engineers are experts at modern multifunction microprocessor relay technology. Our teams design protection for generation, transmission, distribution, and low-voltage systems worldwide. These schemes commonly include all the design documentation, testing procedures, and setting reports for protection, controls, automation, and communications systems.


SEL revolutionized power system protection by building the first microprocessor-based protective relay. Today, SEL leads in protective relays with high-speed, secure, and dependable fault detection; accurate fault location; and comprehensive automation and control functions. SEL relays have the highest mean time between failures (MTBF) in the market (over 500 years). Product portfolio here comprise a comprehensive range of Relays that provides a complete integrated package for the protection, control, and monitoring for various applications and systems. Our highly skilled technology teams understand control principles and protection techniques, and use them to design, manufacture and support control and relay solutions that can be applied to a vast array of applications.

  • Generator Protection
  • Substation Protection
  • Transmission Protection
  • Distribution Protection
  • Merging Units
  • Motor Protection

SEL provides cost-effective capabilities and collaborates with partners like UNICORN to provide complete turnkey solutions. Factory trained and industry-experienced engineers provide the best possible solution for every project.


RTU s from SEL are created to be an internationally standardized method of communication and integration and to support systems built from multivendor intelligent electronic devices (IEDs) that are networked to perform protection, monitoring, automation, metering, and control. Combine intelligent technology, innovative networking, and SEL high reliability to perform station computing and protection, automation, and control for numerous applications.

Our Remote I/O range Expand the I/O of SEL relays and communications processors without modification to the control panel face. Reduce copper in substations by transferring I/O from remote locations over fiber, and provide electrical isolation to avoid ground paths and induced noise interference. Implement teleprotection schemes using high-speed Mirrored Bits communications or IEEE C37.94. These modules are designed to serve as Discrete Programmable Automation Controller, Remote I/O Module with options of Rack-Mount and High Speed, Teleprotection terminal and interface converter.

Features & Benefits:
  • High Reliability, Rugged Design, and Low Price
  • Flexible I/O Configuration
  • Flexible Logic Programming
  • Accelerator Quickset Designer Templates
  • Sequential Events Recorder (SER)
  • Simple Commissioning
  • Flexible Mounting Options
  • Generating and Industrial Plant Monitoring, Control, and Reporting
  • Electrical Substation SCADA, Report Retrieval, and Engineering Access
  • Remote Terminal Unit (RTU) With Local Control


UNICORN designs, develops, tests, and deploys complete SCADA systems to monitor and control your systems or processes. We have experience providing various system sizes, ranging from simple standalone to complex networked systems. We design SCADA systems to assist with outage management, asset optimization, just-in-time (JIT) maintenance, load shedding, load restoration, access control, cybersecurity, and more.

Application-Specific Solutions:

Select from multiple designs for outage management, asset optimization, JIT maintenance, load shedding, load restoration, access control, cybersecurity, and more. Examples include:

  • Master and local substation human-machine interfaces (HMIs)
  • Station- and system-wide Sequential Events Recorder (SER)
  • System-wide relay event retrieval
  • Master SCADA server redundancy
  • Remote access
  • Enterprise and local power system report managers
All-in-One Solution

Request a SCADA system that works with new and legacy equipment. Our engineers work with operations requirements, preferred SCADA software, and existing equipment to create an economical, high-quality system.

Typical System Features
  • Master and local substation HMIs
  • Protection data network
  • Station- and system-wide Sequential Events Recorder (SER)
  • System-wide relay event retrieval
  • Synchrophasor data collection
  • Master SCADA server redundancy
  • Remote access
  • Fast response to HMI control outputs
  • 1 ms SER resolution
  • Self-testing
  • Time synchronization
  • IED polling
  • Enterprise and local power system report manager
  • Industry-standard protocols

For a customized distribution automation solution fast protection with flexible automation and communications and that makes your system safer, more reliable, and more economical, CONTACT our solutions team.