How do I read MCCB nameplate?

How to Read MCB Nameplate Rating?

  1. Model Number.: All reputed manufacturer has a particular code of each device type.
  2. MCB Current and Curve Rating: As shown in example, it is mentioned C20 (and in the below image, it is B25).

How do I choose my MCCB rating?

Following specifications are required to select appropriate MCB or MCCB.

  1. (A) Current Related:
  2. (B) Voltage Related:
  3. (C) Application Type:
  4. (D) Accessories:
  5. (E) Protection Type:
  6. (F) Others:
  7. (1) Frame Size (Inm):
  8. (3) Ultimate short-circuit breaking capacity (Icu):

What is the symbol of MCCB?

Summary

Description English: An example of a electrical symbol for a moulded case circuit breaker (MCCB).
Date 27 June 2013
Source Drawn using Adobe Illustrator.
Author Tara Zieminek

How do I select capacitor for APFC?

Calculation of required capacitor:

  1. Suppose Actual P.F is 0.8, Required P.F is 0.98 and Total Load is 516KVA.
  2. Power factor = kwh / kvah.
  3. kW = kVA x Power Factor.
  4. = 516 x 0.8 = 412.8.
  5. Required capacitor = kW x Multiplying Factor.
  6. = (0.8 x 516) x Multiplying Factor.

What is B20 in MCB?

This is the Wylex B20 MCB Type B 20A Single Pole 240V AC, a plug-in miniature circuit breaker with yellow back ideal for general domestic use in the Wylex Consumer Units. In principle, this Wylex plug-in MCB detects overcurrents due to both overload and fault currents.

What is B10 in MCB?

Catalog Description: S802N-B10 High Performance MCB. Long Description: The S802N-B10 is a 2-pole High Performance Circuit breaker with B-characteristic, with cage terminal and a rated current of 10 A. It is a current limiting device with a maximum breaking capacity of 36kA at 240/415V.

How is MCCB size calculated?

Size of MCB for Branch Circuit-2:

  1. Load Current of Computer = (No X Watt X Demand Factor)/Volt =(2X200X0.
  2. Branch Circuit-2 Current as per NEC = Non Continues Load+125% Continues Load.
  3. Branch Circuit-2 Current as per NEC =(1.04)+125%(0) =1.04Amp.
  4. Type of Load=Lighting Type.
  5. Class of MCB=B Class.
  6. Size of MCB=6 Amp.

What is kA rating in MCCB?

kA rating of an MCB or an MCCB is the maximum current it can safely interrupt in case of a short circuit. If the current goes beyond this value, the circuit breaker could be damaged. kA rating is known as the short circuit withstand capacity or ultimate breaking capacity of a circuit breaker.

What is MCCB circuit breaker?

A moulded case circuit breaker (MCCB) is a type of electrical protection device that is used to protect the electrical circuit from excessive current, which can cause overload or short circuit.

How do you calculate capacitor bank circuit breaker?

Size of the Circuit Breaker =135% to 150% of Capacitor Charging current.

  1. Size of the Circuit Breaker=1.5×44.9Amp.
  2. Size of the Circuit Breaker=67Amp.
  3. Thermal relay setting between 1.3 and 1.5of Capacitor Charging current.
  4. Thermal relay setting of C.B=1.5×44.9 Amp.
  5. Thermal relay setting of C.B=67 Amp.

What size start capacitor do I need?

The voltage rating of electric motor starting capacitors should be rated at about 1.5 x the line voltage supplied to the motor. To me that suggests that your 330V cap is the right voltage. Electric motor starting capacitors are typically 125, 165, 250 or 330 VAC and are in the 25 µF to 1,400 µF range in microfarads.