What is a 100mA RCD used for?

‘High sensitivity’ RCDs, rated 30mA or even 10mA, are designed to disconnect the supply within 40ms at 150mA and within 300ms at rated tripping current to protect the user. ‘Medium sensitivity’ devices, rated 100mA or more will provide protection against fire risks but will not provide full personal protection.

What is a Type B RCD?

Type B RCDs can detect sinusoidal AC, pulsating DC, composite of multi-frequency as well as smooth DC residual currents. Type B RCD are intended to be used for loads with three-phase rectifier, such as variable speed drives, PV system, EV charging station and medical equipment.

What’s more sensitive 30mA or 100mA?

Yes, 30mA is safer than 100mA. 10mA, the lowest standard size, is safer still.

Is 100mA better than 30mA?

A 30mA RCD will save the majority of people in most circumstances when they come into contact with an energised part of the installation. A 100mA device in the same scenario will save less. The operating characteristic of a 30mA device is designed to be just on the survivable side of the current vs.

When to use Type B and B + RCDS?

Type B+ RCDs provide protection against DC Residual Fault Currents, and against AC Residual Fault Currents up to 100 KHz. Type B RCDs are used where DC residual currents could occur, for example, three phase rectified supplies, but also with microgenerators or SSEGs (Small Scale Electricity Generators) such as solar panels and wind generators.

Which is the best RCD 4p Type B?

RCCBs 4P type B are suitable to detect earth faults’ currents. In case the installations requires also protection from eventual overload and short-circuits, the RCCBs must be installed in series with MCBs or with fuses. RCCBs’ mechanism is trip-free, that is the RCCBs can also trip when the lever is held in ON position.

When to use Type B + residual current protection?

At the moment, type B+ are only introduced in a DIN VDE 0664-100 specification applicable in Germany. Like type B residual current protection devices, type B+ residual current protection devices are suitable for use in alternating current systems.

What kind of faults does a type B RCD detect?

The standard Type B RCD will detect residual current faults comprising of pure AC up to 1000 hertz, rectified AC, pure DC and pulsating DC.