When should i use MCCB and MCB Breakers?

Dear Friend,

Trying to answer your question as :-

When should i use Molded Case Circuit Breakers and Mini Circuit Breakers?

* First of all MCB is Miniature Circuit Breaker , since it is miniature it has limitation for S C and Amp Rating Both.

# MCB are available as Singe module and used for :-

Number of Pole :- 1,2,3,4 - 1+ N , & 3 + N

# Usually Current range for A.C., 50-60 HZ ., are from 0.5 Amp - 63 Amp.

Also available 80A, 100A, and 125 Amp.

# SC are limited 10 KA

# Applications are as :- Industrial , Commercial and Residential application.

# Tripping Curve

B Resistive and lighting load

c Motor Load

D Highly inductive load.

* MCCB :- Moulded Case Circuit Breaker

# MCCB are available as Singe module and used for :-

Number of Pole :- 3 pole , & 4 Pole

# Usually Current range for A.C., 50-60 HZ ., are from

3.2 /6.3/12.5/25/50/100/125/ 160 Amp. - SC 25/35/65 KA

200 250 Amp. - SC 25/35/65 KA

400 630/800 Amp - SC 50 KA

# Protection release :-

Static Trip :- Continuous adjustable overload protection range 50 to 100 % of the rated current

Earth fault protection can be add on with adjustable earth fault pick up setting 15 to 80 % of he current

# Micro processor Based release :-

Over load rated current 0.4 - 1.0 in steps of o.1 of ln trip time at 600 % Ir(sec) 0.2.0.5,1, 1.5 , 2 ,3

Short Circuit :-2 - 10 in steps of 1 lr , short time delay (sec) 0.02.0.05,0.1, 0.2 ,0.3

Instantaneous pick up ;- 2 - 10 in steps of 1 ln Ground fault pick up Disable, 0.2 - 0.8 in steps of 0.1 of in

Ground fault delay (sec) - 0.1 -=to 0.4 in steps of 0.1

This are available with communiction port RS 485 and protocol MODBUS,RU

THE ABOVE INFORMATION CAN VERY WITH DIFFRENET MANUFACTURER

HOPE YOUR QUERRY HAS BEEN TRIED TO ANSWER WITH IMMEDIATE AVAILABLE INFORMATION

NIRANJAN A SHATSRI