From a quick branch-circuit check to test day in the field.
Multi-brand relays and CBs on the same log-log plot
Interactive ΔT selectivity with single-line diagram
Transformer damage curve and inrush
Professional, customizable PDF reports
Supports primary and secondary values
Bilingual interface and reports (Spanish / English)
7+
Relay Brands
+10
CB Models
Curves
ANSI / IEC
Reports
PDF
ΔT
Selectivity
C57.109
Transformer
All your protection curves in one plot
MULTI-BRAND COMPATIBILITY · RELAYS
One interface per protection relay, just like the real device
It's not a generic box where you type in numbers. Each relay replicates the manufacturer's real display, so you feel like you're in front of the physical device. You enter settings exactly as they appear on the relay's panel
And with each brand's native terminology: the overcurrent pickup isn't called the same in a SIPROTEC as in a SEL. You become familiar with each device's real terms — IEC is practically the only standard common to all of them.
A tool that feels alive and interactive, not just another form.
Siemens
SIPROTEC 4
Siemens
SIPROTEC 5
SEL
SEL-751
Schneider
SEPAM
GE
Multilin
ABB
REF
ABB
DPU2000
Schneider
MiCOM
Siemens
ETU15B
Siemens
ETU25B
Siemens
ETU27B
Siemens
ETU45B
ABB
EMAX2 Ekip
Schneider
Micrologic 2A
Schneider
Micrologic 5A
Schneider
Micrologic 6A
EATON
PXR20
EATON
DIGITRIP 1150
MULTI-BRAND COMPATIBILITY · CIRCUIT BREAKERS
Low-voltage trip units, with their L-S-I-G zones
RTC2 includes the electronic trip units from leading manufacturers — Siemens ETU, Schneider Micrologic, Eaton Digitrip, and ABB Emax2 — with their Long, Short, Instantaneous, and Ground protection zones.
Plot the breaker's complete curve and coordinate it on the same log-log plot alongside your relays — something that would normally require a full study
POWER TRANSFORMER MODULE
The transformer's damage curve and Inrush, on the same plot
RTC2 brings the power transformer references for the branch under study directly onto the log-log plot: its damage curve per ANSI/IEEE C57.109-2018, and the inrush point. At a glance, you confirm your protections let inrush through without nuisance tripping — and that they act before the transformer enters its damage zone.
A protection coordination without the transformer's damage curve is technically incomplete.
SELECTIVITY ANALYSIS
The ΔT margin, calculated and evaluated for you
The heart of RTC2. Verify that two cascaded devices — upstream and downstream — trip in the correct order for a common fault. RTC2 calculates that time margin, the ΔT, and automatically evaluates it against the industry-recommended range
Explore coordination across the entire plot
ΔT isn't a single number — it varies across the whole current range. Standard analysis evaluates it only at ImaxF, but with the sweep cursor you scan the ΔT at any point on the plot, in real time, without touching a setting or re-plotting anything.
< 0.2 s Risk
upstream could trip at the same time or before: selectivity is lost
0.2–0.4 s Recommended ✓
safe margin for tolerances and breaker opening times
> 0.4 s Loose
the backup takes too long, exposing the system to more damage
TECHNICAL REPORTS
Two reports, one click, ready to deliver
RTC2 generates PDF reports with deliverable-document quality — ready for calculation memos, project files, commissioning certifications, or direct delivery to the client. Two formats, depending on what you need to document.
Not a descriptive report: it's a technical evaluation with a verdict.
Test Report
Field engineer
Documents trip verification using secondary injection. Includes installation data, relay and test-equipment identification, settings in secondary and primary values, log-log plot with the test points overlaid, photographic evidence, and signatures from the three responsible parties
Selectivity Report
Coordination
Documents coordination between two cascaded devices — relay-relay, CB-relay, or CB-CB. Includes the single-line diagram, both devices' curves on the plot, complete settings for each, and the calculated ΔT margin.
"Reports with your logo and name" (Optional)
Integrate your company's identity directly into the software — it isn't a field you fill in, nor a template you configure: it's compiled into your own version. You receive a unique, personalized executable, delivered via download link.
Made to order
Customized version
WHY CHOOSE RTC2
Not just another curve plotter
Three reasons a protection engineer chooses it
PILAR 01
Built by and for the protection engineer
IInterface that replicates the real device
Native nomenclature of each manufacturer, not a generic spreadsheet.
Educational by design
Labeled curves and visible equations. You learn by using it, no course required.
Primary and secondary values
The same software on the test bench and in the coordination study.
7 relay brands · 10 trip units
ABB · Siemens · Schneider · SEL · GE · Micom · DEIF
PILAR 02
From setting to deliverable, without leaving the program
Everything on a single log-log plot
Relays, Circuit Breakers, and transformers coexisting.
ΔT selectivity with sweep
Verify coordination across the whole range, not just one point.
The test set measures. RTC2 documents.
CT ratio with primary equivalent, the curve's equation, the log-log plot, evidence, and signatures. Ready for the file.
PILAR 03
Without the friction of a full study
Coordinate a branch circuit in minutes
Without modeling the entire network like a full study platform would require.
Bilingual Spanish / English
Interface and reports
Direct support from the developer
Guides, tips, and fast answers. No call center.
Accessible price
Plus a free demo to try before deciding.
A test set delivers a table. RTC2 delivers an engineering document.
Settings in the manufacturer's own nomenclature, CT with its primary equivalent, the curve's equation, and the log-log plot — in a single file, ready for the calculation memo.
WHO IS IT FOR?
If you work with protection curves, RTC2 is for you
Test Engineer
Commissioning · Field
You inject secondary current, verify trips, and have to deliver a report. RTC2 turns your measurements into a formal document: settings, CT ratio, primary equivalent, and signatures.
"I already measured. Now I have to document it."
Project or Plant Engineer
Coordination · Design
You need to verify a branch circuit's coordination without setting up a full network study. Load the settings, plot, and in minutes you know if the ΔT is healthy.
"I just want to know if this branch coordinates."
Maintenance Technician
Relays · Trip units
You work with relays and trip units in the field. The interface replicates the real device, so you're not translating anything: you enter settings exactly as you see them on the panel.
"It looks just like the relay I have in front of me."
Instructor and Student
Training · Protection
Curves are labeled and equations are in view. You understand why the curve has that shape, not just that it does.
"This shows where the trip time comes from."
Contractor, integrator, or service company?
Reports can carry your logo and name — a unique tool for your team.
LICENSES
Choose the scope, not the term
All licenses are perpetual, one-time payment. No renewals, no expiration, no shutoffs.
PROTECTION RELAYS
Relay brands
Siemens · SEL · ABB · GE · Schneider · Micom · DEIF
ANSI 50/51 and 50N/51N functions
Primary and secondary values
Trip points on the curve
CIRCUIT BREAKERS
Trip units
ETU · Micrologic · Digitrip · Emax2
L-S-I-G zones
TRANSFORMER
C57.109 damage curve
Inrush point
SELECTIVITY
Relay-Relay
CB-Relay and CB-CB
ΔT calculation
ΔT sweep cursor
REPORTS
Test report without watermark
Selectivity report
Your logo and name on the reports
GENERAL
Bilingual ES/EN interface and reports
Direct developer support
Unique compilation for your company
Essential
Protection relays
$110
One-time payment
7
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Professional
Full software
$165
One-time payment
7
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10
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Corporate
Everything + your brand
$225
One-time payment
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Priority
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ONE-TIME PAYMENT · FOREVER
3.x updates included
Perpetual license for version 3. 3.x updates are included at no cost. Future major versions will offer preferential pricing for existing users. · Payment via PayPal. · Not sure which license you need? Contact us.
DEMO
Try it at your own pace, no time limit
Download the RTC2 demo version and explore the full workflow: SEL relay, ETU45B Circuit Breaker, transformer module, and ΔT selectivity.
No expiration date, no usage limit.