B model RCCB: RESIDUAL CURRENT CIRCUIT BREAKER

  RCCB B model is worked on type A and in additon for smooth DC residual currents, residual DC currents that may result fromrectifying circuits and high frequency AC residual currents.Itprotects in the event ofcontunuous fault current on three phase networks.Itusually is used in the field of Recharging Station,MedicalApparatus and Instruments, Controllers and Variable Speed Drives, Batter Chargesand Inverters(DC)..STID-B complys with IEC/EN61008 and IEC/EN62423 standard.

General
1. Application:For protecting cables and equipments against overload and short circuit.
2. General rules for choosing RCCB.

• Technical data of the network at the point considered

The earthing systems,short-circuit current at the circuit breaker installation point,which must always be less than the breaking capacity of this device,network normal voltage.

• There are 3 curvve characteristics for magnetic operation:

B curve (3-5In) protection and control of the circuits against length cables in TN and IT systems.
C curve (5-10In) protection and control of the circuits against overloads and short-circuits; protection for resistive and inductive loads with low inrush current.
D curve (10-14In) protection and control of the circuits against overloads and short-circuits; protection for circuits which supply loads with high inrush current at the circuit closing (LV/LV transformers,breakdown lamps.)










Model	STID-B
Standard	IEC/EN 61008-1,IEC/EN 62423
Poles	1P+N,3P+N
Rated Circuit In(Rci)	25A,40A,63A
Rated Short-circuit capacity(Icn)	10KA
Rated Voltage(Un)	230(240)/400(415)V
Rated Frequency	50/60HZ
Tripping curve	B,C,D
Magnetic releases	B curve: between 3and 5 In
	C curve: between 5and 10In
	D curve: between 10 and 14In
Electro-mechanical endurance	over 10000 cycles