🏗️ EPC PILOT — 5 places remaining

Protection engineering. Rethought from scratch.

GridSense brings professional-grade power systems calculations to your browser — IEC 60909 fault analysis, IEEE 1584 arc flash, TCC coordination, and PDF reports. No desktop install. No large upfront licence.

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5 EPC firms · Full Professional access · No credit card · 60-day trial
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21kA
Fault current calc
IEC 60909
Standard compliant
210+
Verified test cases
₹2,499
Per user / month
app.gridsense.io/dashboard/project-001
Isc 3-phase
21.66 kA
415V MDB busbar
Peak Current
40.67 kA
IEC 60909 κ=1.88
Max Arc Flash
0.04 cal/cm²
PPE Category 0
Coordination
0/3
⚠ Miscoordinated
TCC — Time Current Characteristics
MAIN 630A SUB 250A FINAL 100A Isc
Device Health
MAIN
4%
SUB
14%
FINAL
28%
THERMAL
100%
⚠ MAIN thermal capacity at limit
IEC 60909 Short-Circuit
IEEE 1584 Arc Flash
IEC 60255 TCC Coordination
ANSI 50/51 Overcurrent
COMTRADE Export
Contact Wear Monitoring
IEC 61439 Panel Verification
Thermal Modelling
PDF Report Generation
IEC 60909 Short-Circuit
IEEE 1584 Arc Flash
IEC 60255 TCC Coordination
ANSI 50/51 Overcurrent
COMTRADE Export
Contact Wear Monitoring
IEC 61439 Panel Verification
Thermal Modelling
PDF Report Generation
The problem

Protection software is
stuck in 2005

The tools haven't changed. The prices have only gone up. There's a better way.

01
Enterprise-only pricing
Existing power systems software is priced for utilities with massive capex budgets. Independent consultants, panel builders, and small firms are priced out entirely.
02
Installed desktop software
Single-machine licences. No collaboration. No version history. A site visit means a laptop. Sharing a project means emailing proprietary file formats nobody else can open.
03
Black-box calculations
You get a number. You don't always know exactly which clause of which standard produced it. When a client questions the result, you're back to first principles with a spreadsheet.
What you get

Every calculation.
Every standard.
One platform.

From initial fault level study to final arc flash label — GridSense covers the full protection engineering workflow, backed by verified physics and cited standards.

⚡
IEC 60909 Fault Calculation
3-phase, 1-phase, and peak fault currents. Transformer and cable impedance from nameplate data. Every result cites the exact clause it came from.
IEC 60909
📈
TCC Coordination
Interactive log-log time-current curves. Grading margin analysis across every device pair. Flags miscoordinations and suggests settings adjustments automatically.
IEC 60255
🔥
Arc Flash Assessment
IEEE 1584-2018 incident energy calculation. PPE category, arc flash boundary, and working distance for every bus. Generates compliant arc flash labels ready to print.
IEEE 1584
🔋
Device Health Monitoring
Contact wear, thermal capacity, and cumulative I²t tracking for MCCBs and ACBs. Predicts remaining useful life and flags devices approaching end-of-service.
Predictive
🛡️
IED Protection Relay
Full ANSI 50/51/67/21/27/59/81/87 function set. Zone-selective interlocking, directional overcurrent, and distance protection. COMTRADE export for relay testing.
ANSI C37
📄
PDF Report Generation
Stamped engineering reports with one-line diagram, TCC curves, coordination summary, and arc flash labels. Ready to submit to clients and authorities having jurisdiction.
Client-ready
🔌
Fault Level Analysis
Bus-level fault level studies with symmetrical component decomposition. Motor contribution, X/R ratio, and peak factor. Supports HV/MV/LV up to 400 kV.
IEC 60909
🎯
Distance Protection
ANSI 21 zone reach calculation with interactive R-X impedance diagram. Zone 1/2/3 coordination, pilot schemes, and reach verification against load encroachment limits.
ANSI 21
⚙️
AVR & PSS Design
IEEE 421.5 excitation system modelling for ST1A, DC1A, and AC1A. Bode plot, gain/phase margins, and PSS1A power system stabiliser tuning at defined oscillation modes.
IEEE 421.5
📊
Load Flow & DC-OPF
Newton-Raphson and Gauss-Seidel load flow with bus voltage, line flow, and loss reporting. DC Optimal Power Flow for transmission-level dispatch cost minimisation.
IEC 60038
🗓️
Unit Commitment & Dispatch
MILP-based 24-hour generator scheduling with startup/shutdown costs, ramp rates, and spinning reserve constraints. HiGHS solver — optimal dispatch schedule in under 30 seconds.
MILP / HiGHS
🌊
Transient Stability
Time-domain swing equation simulation for multi-machine networks. Fault-on / fault-cleared scenarios, critical clearing time, and rotor angle plots. Classical and detailed generator models.
IEEE 1110
📉
Voltage Stability
Continuation power flow (CPF) P-V and Q-V nose curve analysis. Identifies voltage collapse point, maximum loadability, and weakest buses. Reactive power margin quantification.
CPF / P-V
〰️
Small Signal Stability
Eigenvalue analysis of multi-machine power systems. Identifies inter-area and local oscillation modes, damping ratios, and participation factors. WSCC 9-bus demo included.
Modal Analysis
🔁
Frequency Response & UFLS
System frequency response modelling for loss-of-generation events. Under-frequency load shedding (UFLS) scheme design with stage thresholds, delays, and frequency nadir prediction.
IEC 60034
How it works

From nameplate to
report in minutes

1
Enter or upload device data
Type in nameplate values or upload a CSV. GridSense parses transformer ratings, cable sizes, and MCCB settings automatically.
2
Run the calculations
IEC 60909 fault levels, TCC grading, and IEEE 1584 arc flash all run in under 2 seconds. Fully transparent — every formula shown.
3
Review and optimise
Interactive TCC chart shows miscoordinations instantly. Adjust TMS and delay settings live and see the effect in real time.
4
Export and deliver
Download a PDF report, export COMTRADE files for relay testing, or share a live link with your client — no account needed on their end.
IEC 60909
Short-circuit currents
IEC 60255
Measuring relays
IEEE 1584
Arc flash hazard
IEC 60947
LV switchgear
ANSI C37
Protection relays
IEC 61850
Substation comms
IEC 61439
LV assemblies
IEC 60364
Electrical installations
IEEE 421.5
Excitation systems
ANSI 21
Distance protection
Pricing

60-day pilot.
Affordable after.

EPC firms get full Professional access free for 60 days. Paid plans activate after the trial — less than one day of engineering time per month.

🏗️ EPC PILOT — 60 DAYS FREE
EPC Pilot
FREE
60-day pilot · 5 EPC firms · limited places
Full Professional access for your team — run real project studies and validate GridSense against your existing workflow. No charge for 60 days.
  • Everything in Professional
  • Fault level · Arc flash · Relay coordination
  • Distance protection · Fault level analysis
  • AVR / PSS design (IEEE 421.5)
  • Load flow · DC-OPF · Unit commitment
  • Stamped PDF reports for every study
  • Direct line to founders during trial
  • Grandfathered pricing on conversion
Apply for pilot →

Use code PILOT60-X at checkout

Starter
₹ 2,499
per user / month
For individual engineers and freelancers running occasional protection studies.
  • 10 active projects
  • IEC 60909 fault analysis
  • IEEE 1584 arc flash (2018)
  • IEC 60255 relay coordination
  • Cable & busbar sizing
  • Stamped PDF report export
  • Email support
Start free trial
MOST POPULAR
Professional
₹ 6,999
per user / month
For active consultancies running studies on every project.
  • Unlimited projects
  • Everything in Starter
  • Load flow analysis
  • Harmonic analysis (IEC 61000)
  • Motor starting & PFC
  • Transformer & earthing (IEEE 80)
  • Network SLD + topology
  • API access
  • Priority support
Start free trial
Enterprise
Custom
volume pricing available
For utilities, EPCs, and teams needing white-labelling, SSO, or dedicated support.
  • Everything in Professional
  • Team & org management
  • White-label / OEM option
  • SSO / SAML integration
  • On-premise deployment
  • Dedicated account manager
  • SLA & DPA included
Contact sales →

Annual billing: £29/mo billed monthly or — billed annually for Starter. See full plan comparison →

🏗️ EPC Pilot

Why EPC firms are
joining the pilot

5 EPC firms · 60-day free trial · Full Professional access. Tell us what works, what breaks, and what to build next.

⏱️
"Relay coordination studies take 2 full days with our current tools. I want to see if this can change that."
— Reason cited by protection engineers on the waitlist
💷
"Enterprise power systems licences are completely out of reach for independent consultants and small firms."
— Reason cited by independent chartered engineers on the waitlist
📄
"I need calculation reports that cite the exact IEC/IEEE clause — for PI insurance and client sign-off."
— Reason cited by panel builders and consultancies on the waitlist

EPC pilot participant? Your real-world feedback shapes every release.
Share what works, what breaks, and what we're missing — reply to your onboarding email or hit the Feedback button in-app.

🏗️ EPC Pilot Programme

60 days free.
No credit card.

We're onboarding 5 EPC firms for a 60-day pilot — full Professional access at no cost. Run real project studies, validate the calculations against your existing tools, and tell us what to build next.

Apply for EPC Pilot Contact us →

60-day free trial · Full Professional features · No credit card · 5 pilot places remaining