Replacing a Legacy Variable Frequency Drive: What to Check
A checklist for replacing an older variable frequency drive with an identical used spare or a current-generation model, beyond the HP or kW rating.
3JIndustry · Guides techniques
Buying guide
Legacy PLC Obsolescence: Keep It Running or Migrate?
A practical way to decide whether to keep a legacy PLC running or migrate it, with a spare-parts, backup and phased-migration plan.
How to Read Industrial Part Numbers and Nameplates Before You Order
Learn the difference between catalog and serial numbers, why series letters and voltage codes matter, and how to photograph a nameplate so you order the right...
Contactor Coil Voltages and Coil Codes: How to Get the Right One
How contactor coils differ (AC or DC, 50 or 60 Hz, electronic) and how to read coil markings and codes so the replacement closes reliably.
Buying Used and Legacy Industrial Parts: A Practical Checklist
A practical checklist for buying used and legacy industrial parts: part number and series, coil voltage, firmware, photos, condition notes, warranty, lead time and cross-border shipping.
Fonctionnement : alimentations électriques
How industrial DC power supplies work, why 24 VDC is the standard control voltage, and how to size and replace a supply with the right margin.
Fonctionnement : capteurs inductifs, capacitifs, photoélectriques et à ultrasons
A practical comparison of inductive, capacitive, photoelectric and ultrasonic sensors: how each one detects a target, where it works well and how to pick a replacement.
Fonctionnement : capteurs inductifs et capacitifs
Inductive sensors detect metal; capacitive sensors detect almost anything. Learn how each works, how to choose, and how sensing distance, mounting and target material affect detection.
Contacteur - application
How contactors work, what AC-3, AC-1 and AC-4 ratings mean, and a step-by-step method to select or replace a contactor, including reversing pairs and interlocks.
Normes et certifications nord-américaines
How North American electrical standards are organized (NEC, CEC, UL 508A, UL and CSA product standards) and how to read UL, cULus and CSA marks on...
Disjoncteur - Disjoncteur divisionnaire - Disjoncteur à couplage magnéto-thermique
A practical guide to miniature, molded-case and air circuit breakers: trip units, the ratings that matter and how to read a breaker label.
3JIndustry.com – Boutique eBay et PayPal
Buy used automation and electrical parts from 3JIndustry on our website or in our eBay store, seller 3jindustry2016.
