Circuit breakers: which curve and rating for your panel
Customers buy circuit breakers from us mostly for control-panel assembly. Our typical customer this year: an installer wiring an apartment outlet (16-25 A, curve C, 1P or 2P), an electrician on an industrial motor line (curve D for inrush currents), a power engineer fitting a 100-400 A main feed into a metering cabinet. The catalog carries over 4000 models from four brands: ABB, Schneider Electric, LS Electric, GE. We ask up front: which current, how many poles, what loads.
Sizing logic in plain terms. Curve B – purely resistive loads (heaters, incandescent lighting) and weak supplies. Curve C – the universal pick for most apartments and offices, consumer electronics. Curve D – motors and compressors with 6-8x inrush. Poles: 1P phase, 2P phase+neutral (apartment with RCD), 3P three-phase no neutral, 4P three-phase with neutral. Breaking capacity 4.5-6 kA for apartments, 10 kA for industry, 25-50 kA for main feeders.
What we ask before you order a breaker
First: where it sits. Apartment panel – ABB S200 or Schneider iC60N, 1-2P, 6-63 A range. Industrial panel with motors – same series but curve D for starts. Main building feed or a small substation – moulded-case ABB Tmax, Schneider Compact NSX, or LS TS800. Second: rating. A 3.5 kW 220 V outlet – 16 A. A 7 kW electric stove – 32 A. A 3-phase 11 kW load – 25 A on 3P. A motor in the panel – breaker rated 1.5-2x the motor working current.
Third: paired gear. If the breaker sits ahead of a VFD, mandatory curve D and 25-30% current margin (the VFD draws a charging spike into DC capacitors at power-on). If the scheme has a contactor for motor switching, the breaker handles short-circuit protection and the contactor handles routine switching. Manufacturer warranty on ABB and Schneider 12-24 months. LS carries 12. Ship from our Kyiv warehouse the same day. Popular ratings 16/25/40/63 A always in stock. Sizing consultation for your panel is free.
| Model | Brand | Series | Rated current | Poles | Price, UAH |
|---|---|---|---|---|---|
| iC60N 63A 2P | Schneider Electric | iC60N | 63 A | 2P | 1,113 |
| S203 C16 | ABB | S200 | 16 A | 3P | from 350 |
| TS800L 800A | LS | TS800L | 800 A | 3P | 141,583 |
Circuit breaker manufacturers
ABB — 1,581 models in catalog, from modular S200 series to molded case Tmax. Schneider Electric — 1,108 models, iC60 and Compact NSX series. LS Electric — 1,087 models, molded case TS series. GE — 378 models for industrial use.
Warranty and delivery
All circuit breakers come with a manufacturer warranty. Delivery across Ukraine via Nova Poshta, payment by bank transfer or cash on delivery. Contact our technical support for help selecting the right breaker for your equipment.
