Residual Current Monitoring & Protection

Empowering electrical safety through advanced type – A/F/EV/B RCD technology integration

Type AC RCD is insufficient for electrical safety

With an increasing use of power electronics equipment, the traditional Type AC residual current devices can not provide sufficient protection against electrical shock and fire. Bituo offers advanced Type A / F / EV / B technologies that can be integrated into your products and systems, so as to make electricity safter with our customers and partners.

RDC Type	Fault current detected	Typical types of load
Type AC	Sinusoidal AC residual current	Resistive, capacitive, inductive loads. Immersion heater, oven/hob with resistive heating elements, electric shower, tungsten/halogen lighting, etc.
Type A	Sinusoidal AC residual current Pulsating DC residual current	Single-phase with electronic components Single phase inverters, class 1 IT & multimedia equipment, power supplies for class 2 equipment, appliances such as washing machines, lighting controls, induction hobs etc. * Type A is also suitable for Type AC applications
Type F	Sinusoidal AC residual current Pulsating DC residual current Composite residual currents with frequencies up to 1000 Hz	Frequency controlled single-phase equipment/appliances Appliances such as a washing machine that is frequency controlled, some class 1 power tools, some air conditioners using variable frequency speed drives * Type F is also suitable for Type AC and Type-A applications.
Type EV	Sinusoidal AC residual current Pulsating DC residual current Smooth DC direct currents per IEC 62955	AC EV charging AC EV charging where both Type A 30mA protection and DC fault current>6mA detection are requested by IEC 62752 and IEC 61851-1. * Type EV is also suitable for Type AC and Type A applications
Type B	Sinusoidal AC residual current Pulsating DC residual current Smooth DC direct currents Composite residual currents with frequencies up to 1000 Hz	Three phase electronic equipment Inverters for speed control, ups, mode-3 EV charging, Photo voltaic, Power Electronic Converter Systems, industrial machines, cranes * Type B is also suitable for Type AC, Type A Type F, and Type EV applications. Difference between Type EV and Type B can be found in this blog post.

Our electronic solution for your

Freestanding RCDs

(Din-Rail RCBO/RCCB, CBR/mRCD, PRCD/GFCI etc.)

Built-in RCD

(IC-CPD, Wallbox, PV Inverter, etc.)

OEM Category		Type A	Type F	Type EV	Type B
Freestanding RCDs	RCCB / RCBO	IC / Sensor Board	IC / Sensor Board	Sensor Board	Sensor Board
	RC-Units	IC / Sensor Board	IC / Sensor Board	Sensor Board	Sensor Board
	RCM / mRCD	Sensor Board	Sensor Board	Sensor Board / ODM	Sensor Board / ODM
	PRCD / GFCI*	Sensor Board	Sensor Board	–	–
Built-in RCDs	EV Charger	–	–	Sensor	Sensor
	PV Inverter	–	–	–	Sensor
	Variable frequency Drives	–	–	–	Sensor