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 the 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 safer with our customers and partners.
RDC Type Fault current detected  Typical types of load 
Type AC
  • Sinusoidal AC residual current
Resistive, capacitive, and 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. The 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
*We advocate the use of type A and F Portable RCD (PRCD) for home appliances with frequency control

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