Testing & Commissioning (Relay)
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
