Electrical Terms Glossary
Electrical safety products se jude terms — aasan bhasha me samjhaye gaye
MCB
Miniature Circuit Breaker
Ek automatic switch jo overload aur short-circuit par current kaat deta hai. Fuse ka modern replacement — reset ho sakta hai.
RCCB
Residual Current Circuit Breaker
Earth leakage aur electric shock se bachane wala device. Current imbalance detect hote hi supply kaat deta hai.
RCBO
Residual Current Breaker with Overload
MCB + RCCB dono ka kaam ek device me — overload, short-circuit aur earth leakage teeno se suraksha.
ELCB
Earth Leakage Circuit Breaker
Purana device jo earth leakage current par trip karta hai. Aaj kal iski jagah RCCB use hota hai.
Isolator
Isolating Switch
Manual switch jo maintenance ke waqt circuit ko poori tarah disconnect karta hai. Fault par khud trip nahi hota.
Changeover Switch
Manual Transfer Switch
Do power sources (jaise mains aur generator) ke beech safely switch karne wala device.
DP Switch
Double Pole Switch
Phase aur neutral dono ko ek saath disconnect karne wala switch — geyser, AC jaise heavy appliances ke liye.
Pole
Number of Poles (SP/DP/TP/4P)
Kitne conductors control hote hain: SP=Single Pole, DP=Double, TP=Triple, 4P=Four Pole (3 phase + neutral).
Curve Type
Tripping Curve (B/C/D)
B-curve: resistive loads. C-curve: general/inductive (ghar, AC). D-curve: high inrush (motors, transformers).
Ampere Rating
Rated Current (A)
MCB kitna current continuously handle kar sakta hai. Load ke hisaab se chuna jaata hai (6A, 16A, 32A, etc.).
kA Rating
Breaking Capacity
Maximum fault current jo device safely kaat sakta hai. Ghar: 6kA, commercial: 10kA+.
Earthing
Grounding
Fault current ko surakshit tarike se zameen me bhejna, jisse shock aur equipment damage se bachav hota hai.
Overload
Over Current
Jab circuit par rated se zyada current chalta hai — MCB isse bachata hai.
Short Circuit
Direct Fault
Jab phase aur neutral seedhe touch ho jaate hain, bahut zyada current flow hota hai — MCB turant trip karta hai.
Modular MCB
DIN-rail MCB
Standard DIN-rail par lagne wala compact MCB — distribution boards me neatly fit hota hai.
