SEL-7203 panels provide advanced protection and control for distribution transformers with a single high-/low-side transformer zone boundary. These panels include the following features:
This module is always required and provides transformer differential and bus zone interlock protection using the SEL-787 Transformer Protection Relay, high-side breaker/circuit switching, motor-operated air break control, and sudden pressure tripping supervision. It also provides overcurrent through-fault and system backup protection using an SEL-751 Feeder Protection Relay and can perform direct transfer tripping if there is no local high-side interrupter.View Product Info
This module is always required and provides redundant transformer differential protection, REF protection, overcurrent through-fault protection, and low-side breaker control and breaker failure protection.
If the station includes a bus-tie breaker, a version of the module that includes an SEL-751 breaker control relay is available. This relay provides breaker control with breaker failure, synchrocheck, and voltage monitor supervision. The tie breaker relay can also provide arc-flash protection if the buses are covered by arc-flash sensors.View Product Info
This module provides independent local control and indication for up to four switching devices.View Product Info
This module provides independent local control and indication for up to three switching devices using rotary switches.
This module provides independent mechanical lockout for the transformer protection (86T) and/or breaker failure protection (86BF) using rotary lockout switches.
SEL CTO panels embody SEL best-known engineering methods and field-tested expertise in mechanical design, cable management, protection, precise time, automation, communications, and metering.
Application modules support common protection and automation practices while universal wiring to terminal blocks allows customization flexibility to adapt to any common primary equipment configuration and operation practice.
SEL uses the same world-class manufacturing principles for our panels that we use for all our industry-leading products. This allows us to design, manufacture, test, and deliver top-quality and comprehensive panel systems.
Complete vertical integration and standardized application designs help us maintain competitive prices and high quality while still meeting the highest functionality requirements.
SEL CTO panels provide the following:
We build a prototype and test each application module design to ensure it meets functional specifications. This process allows our manufacturing facility to properly document processes and test manufacturing equipment for production.
SEL CTO panels come with comprehensive information using best practices for documenting protection and control circuitry. With standardization, the level of error-free detail is unmatched compared to what is practical with custom panels. SEL drawing packages are personalized to your substation project and nomenclature and include:
We engineer, manufacture, and test our panels to ensure adequate operation before delivery. When a panel arrives at your site, it is already verified as fully functional.
SEL panels are supported by an unmatched ten-year warranty and the industry’s best customer service.
The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.