Protection Engineering
Power System Protection Study & Analysis
Relay coordination, protection settings and fault analysis that make sure faults are cleared quickly and selectively, keeping people safe and the rest of your network running.
Protection study scope
- Relay coordination and setting calculation
- CT and VT adequacy checks
- Arc flash and fault analysis
- Post-fault investigation and root cause
Overview
Selective, fast and dependable protection
Poorly coordinated protection either trips too much, shutting down healthy parts of the plant, or too little, letting faults damage equipment and endanger people. Most settings are never revisited after the system has changed.
DCPS performs complete protection studies based on short circuit results and equipment data. We calculate settings for overcurrent, earth fault, differential, distance and generator protection, verify CT performance and build time-current coordination curves that prove selectivity across the network.
Settings are issued in a format ready to load into the relays, and our engineers can test and implement them on site.
Why DCPS
SelectivityOnly the faulted section trips
All relay typesOvercurrent, differential, distance, generator
CT checksSaturation and accuracy verified
Site testingSettings implemented and tested
What We Offer
Protection engineering services
From individual settings to complete protection philosophy for new and existing networks.
Relay Coordination
Time-current coordination studies proving selective tripping across the protection chain.
Setting Calculation
Settings for ANSI 50/51, 87, 21, 27/59, 81 and generator protection functions.
Fault Analysis
Short circuit studies for all relevant fault types and operating scenarios.
CT & VT Adequacy
Verification of instrument transformer ratios, burdens and saturation performance.
Protection Philosophy
Protection schemes and philosophy documents for substations, plants and grid connections.
Disturbance Investigation
Analysis of relay events and disturbance records to find the root cause of trips.
Our Process
Our protection study method
01
Data Review
SLDs, relay types, CT/VT data and existing settings collected.
02
Fault Study
Short circuit levels calculated for all operating cases.
03
Settings
Relay settings calculated and coordination curves prepared.
04
Review
Results reviewed with your engineers and refined.
05
Implementation
Settings loaded and verified with secondary injection testing.
Deliverables
Protection documentation you can trust
Complete records that make future changes and audits easy.
- Protection study report
- Relay setting sheets ready to upload
- Time-current coordination curves
- CT/VT adequacy calculations
- Arc flash results where required
- Testing and implementation records
Industries We Serve
Networks we protect
FAQ
Frequently Asked Questions
When should protection settings be reviewed?
After any significant network change such as new transformers, generators, solar plants or a change in grid fault level, and periodically as good practice.
Can you work with our existing relays?
Yes. We calculate settings for the relays already installed and highlight any device that cannot achieve the required performance.
Do you test relays on site?
Yes, we can implement settings and verify them through secondary injection testing.
Why did my plant trip on a fault downstream?
This is usually a coordination problem. A protection study identifies where selectivity is lost and how to correct it.
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Send us your SLD and relay list for a protection study proposal. Call +92 345 2270942 or email info@dcpspak.com.