Observed arrival · 2026-10-22
breakerlab’s breaker trip-curve tools
A tool for plotting and comparing low-voltage circuit-breaker trip curves, checking coordination, and preparing breaker test reports.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Breaker testers and maintenance engineers
- Worth noticing
- The free plan lists limits of 10 curves a day and 20 a month; paid Pro and Team plans offer trials.
Field notes
For coordination checks, the page describes placing main, feeder, and branch breakers on one time-current chart, then entering a fault range to inspect overlaps. Its testing workflow fills in test currents and time bands from the selected breaker; users enter readings and can export reports as PDF or XLSX. The site says its curve data is catalog-based, but the supplied excerpt does not enumerate catalog coverage.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
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