Relay Testing

Siemens, ABB, SEL Relays | 11 kV – 400 kV Substations | On-Demand Service

EngineerBari™ provides specialized on-site relay testing, commissioning, and configuration for substations from 11 kV to 400 kV. Our certified power engineers deliver safe, reliable, and long-term protection, including relay setting file calculation, testing, diagnostics, and emergency services.

Voltage-Specific Relay Services

1. 11 kV Substation Relay Services

Applicable Relays: Siemens 7SR, ABB REF615, SEL-351

Target Applications: Small distribution and industrial substations

Service Subcategories:

✅Relay Installation & Configuration – Mounting, wiring, parameter setup, functional testing

✅Relay Setting File Calculation – CT/PT ratios, load, fault current, and coordination curve configuration

✅Primary & Secondary Injection Testing – Overcurrent, earth fault, differential relay verification

✅Relay Communication & Protocol Testing – SCADA/RTU integration, IEC 61850 verification

✅Protection Coordination & System Testing – Trip time verification, backup protection testing

✅Diagnostics & Fault Analysis – Event log download, trip cause investigation, firmware updates

✅Preventive Maintenance & Calibration – Health checks, input calibration, documentation

✅Emergency/On-Demand Relay Services—Rapid testing, temporary relay substitution, immediate commissioning

Benefits: Reliable operation, accurate relay settings, minimal downtime

2. 33 kV Substation Relay Services

✅Applicable Relays: Siemens 7SR, ABB REF615, SEL-351

✅ Target Applications: Regional distribution, medium-load substations

✅Service Subcategories: Same as 11 kV, with emphasis on enhanced coordination and higher fault current testing.

✅Benefits: Improved feeder reliability, correct tripping, and system protection

3. 66 kV Substation Relay Services

Applicable Relays: Siemens 7SR, ABB REF615, SEL-351

Target Applications: Transmission-distribution interface substations

Service Subcategories:

✅ Relay installation & configuration

✅Relay setting file calculation for differential, overcurrent, distance, and earth fault protection

✅Primary & secondary injection testing at full load/fault levels

✅Communication & protocol verification (IEC 61850, SCADA)

✅Protection coordination & trip time testing

✅ Diagnostics & event log analysis

✅Preventive maintenance & calibration

✅Emergency on-site relay support

Benefits: High-reliability operation, reduced forced outages, enhanced system safety

4. 132 kV Substation Relay Services

Applicable Relays: Siemens 7SR, ABB REF615, SEL-351, SEL-487

Target Applications: High-voltage transmission substations, industrial high-voltage networks

Service Subcategories:

✅Relay installation & configuration with precise wiring and parameter verification

✅Relay setting file calculation and upload

✅ Primary & secondary injection testing

✅Relay communication & IEC 61850 protocol verification

✅ System-wide protection coordination and trip time validation

✅Diagnostics & fault analysis, including event log interpretation

✅Preventive maintenance & calibration

✅Emergency/rapid response relay services

Benefits: Ensures reliable high-voltage operation, selective tripping, and reduced downtime

5. 220 kV Substation Relay Services

Applicable Relays: Siemens SIPROTEC, ABB RET670, SEL-487

Target Applications: Ultra-high-voltage transmission substations

Service Subcategories:

✅ Installation and configuration of digital & numerical relays

✅Relay setting file calculation for complex protection schemes

✅ High-level primary & secondary injection testing

✅Communication protocol verification (IEC 61850, GOOSE, MMS, SCADA)

✅ System protection coordination and backup verification

✅ Diagnostics, event log analysis, and firmware upgrades

✅Preventive maintenance & calibration

✅Emergency on-site relay support with temporary substitution

Benefits: Precise high-voltage relay coordination, minimal outage, and stable operation

6. 400 kV Substation Relay Services

Applicable Relays: Siemens SIPROTEC, ABB RET670, SEL-487

Target Applications: Ultra-high-voltage transmission, national grid substations

Service Subcategories:

✅Relay Installation & Configuration – Mounting, wiring, functional testing

✅Relay Setting File Calculation & Upload – Overcurrent, differential, distance, earth fault

✅Primary & Secondary Injection Testing – Full load & fault current verification

✅Relay Communication & Protocol Verification – IEC 61850, SCADA, GOOSE, MMS

✅Protection Coordination & System Testing – Trip time & backup testing

✅Diagnostics & Fault Analysis – Event logs, trip cause, firmware updates

✅Preventive Maintenance & Calibration – Periodic relay health checks, input calibration

✅Emergency/On-Demand Relay Services – Rapid response, temporary relay substitution

Benefits: Ensures critical system reliability, accurate relay response, and rapid fault restoration

Quality & Safety Practices (All Voltage Levels)

✅IEC, OEM, and utility standard compliance

✅ Work by trained HV engineers

✅Controlled jointing and commissioning environment

✅ Compliance with permit-to-work, LOTO, and HV safety standards

Optional Add-On Services

✅Coordination study assistance

✅Relay setting documentation and reports

✅ SCADA / IEC 61850 integration support

✅ Firmware upgrade and backup

Why Choose EngineerBari™?

✅Verified professional power engineers with 11 kV to 400 kV experience

✅Nationwide on-demand service across Bangladesh

✅ Clear documentation and commissioning reports

✅Safe, reliable, and fully compliant with utility standards