MCB / MCCB / ELCB Quick Reference (Part-1)
August 6, 2013 17 Comments
Standard Size of MCB/MCCB/ELCB/RCCB/SFU/Fuse:
| MCB | Up to 63 Amp (80Amp and 100 Amp a per Request) |
| MCCB | Up to 1600 Amp (2000 Amp as per Request) |
| ACB | Above 1000 Amp |
| MCB Rating | 6A,10A,16A,20A,32A,40A,50A,63A |
| MCCB Rating | 0.5A,1A,2A,4A,6A,10A,16A,20A,32A,40A,50A,63A,80A,100A (Domestic Max 6A) |
| RCCB/ELCB | 6A,10A,16A,20A,32A,40A,50A,63A,80A,100A |
| Sen. of ELCB | 30ma (Domestic),100ma (Industrial),300ma |
| DPIC (Double Pole Iron Clad) main switch | 5A,15A,30 A for 250V |
| TPIC (Triple Pole Iron Clad) main switch | 30A, 60A, 100A, 200 A For 500 V |
| DPMCB | 5A, 10A, 16A, 32A and 63 A for 250V |
| TPMCCB | 100A,200A, 300Aand 500 A For 660 V |
| TPN main switch | 30A, 60A, 100A, 200A, 300 A For 500 V |
| TPNMCB | 16A, 32A,63A For 500 V, beyond this TPNMCCB: 100A, 200A, 300A, 500 A For 660 V |
| TPN Fuse Unit (Rewirable) | 16A,32A,63A,100A,200A |
| Change over switch (Off Load) | 32A,63A,100A,200A,300A,400A,630A,800A |
| SFU (Switch Fuse Unit) | 32A,63A,100A,125A,160A,200A,250A,315A,400A,630A |
| HRC Fuse TPN (Bakelite) | 125A,160A,200A,250A,400A.630A |
| HRC Fuse DPN (Bakelite) | 16A,32A,63A |
|
MCB/MCCB/ELCB Termination Wire / Cable |
|
| Up to 20A MCB | Max. 25 Sq.mm |
| 20A to 63A MCB | Max. 35 Sq.mm |
| MCCB | Max. 25 Sq.mm |
| 6A to 45A ELCB | 16 Sq.mm |
| 24A to 63A ELCB | 35 Sq.mm |
| 80A to 100A ELCB | 50 Sq.mm |
MCB Class according to Applications:
MCB Class according to Appliances |
|||
|
Appliance |
Capacity / watt |
MCB Rating |
MCB Class |
|
Air Conditioner |
1.0 Tone |
10A |
C Class |
|
1.5 Tone |
16A |
C Class |
|
|
2.0 Tone |
20A |
C Class |
|
|
Freeze |
165 Liter |
3 A |
C Class |
|
350 Liter |
4 A |
C Class |
|
|
Oven /Grill |
4500 Watt |
32 A |
B Class |
|
1750 Watt |
10 A |
B Class |
|
|
Oven / Hotplate |
750 Watt |
6 A |
B Class |
|
2000 Watt |
10 A |
B Class |
|
|
Room Heater |
1000 Watt |
6 A |
B Class |
|
2000 Watt |
10 A |
B Class |
|
|
Washing Machine |
300 Watt |
2 A |
C Class |
|
1300 Watt |
8 A |
C Class |
|
|
Water Heater |
1000 Watt |
6 A |
B Class |
|
2000 Watt |
10 A |
B Class |
|
|
3000 Watt |
16 A |
B Class |
|
|
6000 Watt |
32 A |
B Class |
|
|
Iron |
750 Watt |
6 A |
B Class |
|
1250 Watt |
8 A |
B Class |
|
|
Toaster |
1200 Watt |
8 A |
B Class |
|
1500 Watt |
10 A |
B Class |
|
JIGNESH PARMAR
Short Circuit Level of Cable in KA (Isc)=(0.094xCable Dia in Sq.mm)/√ Short Circuit Time (Sec)……….what and why is 0.094?.. thanks in advance
i so grateful the information,PLEASE I WILL like to know how to calculate surge circuit breaker
One small issue in our plant to find the neutral line
all phases are giving correct voltge level with phase to neutral also if we give supply to appliance it getting off 4 days we are tried to find the problem finally we got the answer that neutral line is disconnected earth line acting neutral line
in this case how can judge and find the neutral line fault
Thanks for sharing the knowledge. Keep sending.
Regards
Vipul Kadakia
Manager ( Dist – NZ).
Torrent Power Ltd
9276055878
Very Informative………. Keep on going guys… very good job…
Sir, can you explain how A.C. =D.C./0.636 .
11kv system na current nu KWh,KW,MW,MWh karvu hoy to ? 66 kv system na current nu KWh,KW,MW,MWh karvu hoy to ? Same as. 132kv,220kv,400kv,765kv
JE Getco
as a site engineer , it is great collection of formulae for me, bt regarding (spacing of conductor in transmission line how the value (500 ,18,50)in *500+18*p-pv+2* span length /50 came from?
What is P in above equation? (P-PV)
Phase to Phase Voltage !!!!
(Line Voltage)
what is thumb rule for voltage drop?
sir ,please answer it
Dear Sir,
I have small doubt about your earth bar calculation, this is which standard because i am getting correct sq.mm that only ask. In case of any customer asking means how to i explain.
Mohan K
Hw is measured by dyn1 nd dyn11 vector connection in transformer. plz send it sirji…..
Thanks sir
what are all the standard fault level as per IS?
Dear Jignesh sir,
In power transformers can we get value of Inductor (L) .
VERY NICE