What it is and when you need it
Remote SEL relay configuration means loading, reviewing or modifying the settings, logic and communications of a Schweitzer Engineering Laboratories relay or control without traveling to site. Our team works with the SEL devices you find in distribution and transmission substations and in industrial plants around the world: feeder relays such as the SEL-751 and SEL-351, line relays such as the SEL-421 and SEL-411L, transformer relays such as the SEL-487E, bus protection such as the SEL-487B, and recloser controls such as the SEL-651R.
Clients usually call us in three situations:
- New devices that arrive with factory defaults and must carry the project engineering before commissioning.
- Settings changes on in-service relays, driven by a new protection coordination study, a plant expansion or a utility request.
- A trip nobody can explain, or a function that blocked when it should not have.
In every case the work is done over a secure connection that you authorize. There is no need to wait for a specialist to fly out to the substation.
What is included
SEL relays have their own way of doing things, and knowing it well is what prevents mistakes. This is what we review and configure:
- Engineering software. Settings, logic, metering and event retrieval are handled in acSELerator QuickSet (SEL-5030). IEC 61850 is configured in acSELerator Architect (SEL-5032), which takes the ICD file for each model, sets up GOOSE publications and subscriptions, MMS reports and, where the device supports them, Sampled Values, and produces the CID file loaded into the relay.
- Settings groups. SEL relays support multiple settings groups and switching between them by logic or command. We check which group is active, what condition changes it and that every group holds the study values, not only the one in use.
- SELOGIC. Much of an SEL relay’s behavior lives not in the element settings but in the SELOGIC control equations: what trips, what blocks, what drives each output and what goes to SCADA. That is where teleprotection schemes, interlocks and project-specific logic are implemented.
- Communications. IEC 61850 through Architect; DNP3, Modbus and SEL’s own protocols such as MIRRORED BITS when the project uses them between relays; and signal maps to SCADA or the gateway.
- Events and oscillography. SEL relays store standard, raw and compressed event reports plus the Sequential Events Recorder (SER). Each report carries the settings in effect at the time of the fault, so you can tell whether the relay did what its configuration asked. Reports can also be reviewed in COMTRADE format.
- Backup and comparison. Before any change we read the relay configuration and save it. Afterwards we compare what was loaded against what was approved, element by element.
How we work
First we review the information: exact model, part number, firmware version and the approved settings file. On SEL relays, the part number defines which functions, inputs, outputs and ports the device has, and the firmware version defines which settings exist. A file built for another version may not load, or may load differently. We also confirm the rated frequency, 50 Hz or 60 Hz, in both the relay and the settings file, since a template from another project can carry the wrong one.
Next we agree with your communications team on how we reach the relay, through the substation network or a dedicated access device, with an encrypted connection enabled only for the authorized task. We save the existing configuration, load settings, logic and the CID, and verify metering, statuses and SCADA signals with you. If secondary injection tests are needed on site, your staff or your contractor runs them and we support them live online. Our team can also perform field testing in Colombia, or elsewhere on request.
We do not publish step-by-step programming for each model, because it varies with the model, the firmware and each project’s engineering. That is exactly the work we do for you. Remote services are available worldwide; we work from Bogotá (UTC−5) and schedule the work window with you.
Firmware and compatibility precautions
- Firmware version and settings file must match. When they do not, the file is converted or the firmware is updated, never blindly.
- The Architect ICD package must include the relay model and version; otherwise the CID cannot be generated correctly.
- A firmware update is an intervention in its own right: it can change default settings, clear records or require rebuilding the CID. We only do it with your approval and a verified backup.
- Relay access-level passwords stay under your control. We never store them in files or emails.
What we need from you
- Model, part number and firmware version of each relay.
- The approved settings, or the protection coordination study they come from.
- The project logic and scheme: control drawings, signal list and, if applicable, the substation SCD file.
- Secure access to the relay and a site contact during the work window.
- Your written authorization for every intervention on in-service equipment.
Standards and criteria
Inverse-time curves are set according to IEC 60255-151 or IEEE C37.112, as defined by the study. Communications follow IEC 61850 and, toward the control center, DNP3 (IEEE 1815) or whatever protocol your SCADA uses. Oscillography is exchanged in COMTRADE (IEEE C37.111 / IEC 60255-24). Device functions are referenced by their IEEE C37.2 device numbers, such as 21, 50/51 or 87. We adapt the settings to the local code and the utility requirements you give us. If you need the settings themselves, our protection coordination study delivers them ready to load. For SEL-651R controls, see also remote recloser configuration, and for an overview of all brands, remote relay configuration.
Tiza Group works with SEL equipment as an independent engineering company. We are not a representative, distributor or authorized service center of the brand, and product names belong to their manufacturer. Tell us the model and firmware of your devices through contact and we will confirm the scope.