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Residual Current Circuit Breakers

Operating Principle
The RCCB works on the principle of cur rent balance. The Incoming conductors (Phase & neutral) are passed through the very sensitive torroid transformers from the primary winding and secondary electromagnetic relay, which operates the trip mechanism. Normally the contacts are held closed by a spring and open when this is released. If leakage occurs from either of phases or neutral side of circuit in this condition currents are unbalanced by an amount of leakage current and if this reached the rated tripping current of RCCB/ELCB then it trips and save precious human life.

Electrocution is a passage of current through human body, which is dangerous. The flow of current through human body effect vital functions.
1. Breathing
2. Heart beat

A correctly chosen RCCB can detect small currents flowing to earth and reduces the risk fo electrocution. Effect of electric current through human body has been well researched and following chart summarizes the results:
Effect of electric current through human body has been well researched and following chart summarizes the results:
Salient Features
  • Simple Operating Mechanism.
  • Mounting on 35 mm DIN RAIL.
  • Special alloy contacts.
  • Compact Size.
  • High Sensitive fast acting, trip free mechanism.
  • Test Button for regular inspection.
  • Very Low Watts Loss.
  • Dual Termination for Bus Bar as well as cable connection.
    RCCB prevents when :
  • Poor Insulated equipments.
  • Loose connection, faulty wires.
  • Incorrect use of an electrical devices cause currents flow through the wrong path.
  • In case of fire.
Technical Specification : (Ref. IS : 12640 (1) 2000)
Rating Voltage 2 Pole / 240 V~          4 Pole / 415 V~
Current Rating 25A, 32A, 40A, 63A
Sensitivities 30 mA, 100 mA, 300 mA
Tripping Time Less than 30 msec.
Electrical Endurance > 10000 Operation (Electrical)
> 20000 Operation (Mechanical)
Ambient Temp. -5 to 500C

H - 51 Udyog Nagar, Rohtak Road,
New Delhi - 110 041 ( India )
NEWTECH was established in 1998 for manufacturing of Miniature Circuit Breaker, DB, Isolator, RCCB Main Switch etc.

To meet electrical distribution and supply needs of customers in the areas of residential, commercial and Industrial sectors.

NEWTECH has grown strength by strength in the field of design, development, manufacture, testing and supply of MCBs and allied products.