Нашел описание APR, правда на английском, в их журнале Day by Din 1/12:
When to use APR high-immunity RCDs.
APR high-immunity RCDs should be installed whenever unwanted tripping needs to be avoided.
Substantially, there are two such circumstances. The first is when system and load conditions make the probability of disturbances, which could cause unwanted tripping, particularly high. This is the case with:
− Powering electronic loads, particularly if they are fitted with inverters and electrical filters, lights with electronic power supplies, dimmers etc.
− Suburban areas, isolated buildings, overhead power supplies, proximity to factories or construction sites, areas subject to thunderstorms (in these cases it is also necessary to provide for surge protection using suitable SPDs).
The second occurs when operational continuity is particularly essential, like in the following cases:
− Hospitals, emergency services;
− Intrusion alarm systems, refrigerators, freezers, electric vehicle charging systems;
− Non-supervised systems, radio basestations, surveillance equipment;
− IT centres;
− Continuous industrial processes;
− etc.
Также, в описании сказано, что время реакции выбрано так, чтобы соответствовать требованиям стандарта, приближаясь к верхней границе, т.е. разрешая работу максимально допустимое время и обеспечивая оптимальную защиту.
Вот, в итоге:
The range of ABB RCDs also includes AP-R (anti-disturbance) devices which trip according to the limit times allowed by the Standards for instantaneous RCDs. This function is due to the slight tripping delay (approx. 10 ms) relative to the standard instantaneous ones. - просто 10мс задержка перед срабатыванием. Думаю, вполне допустимо для дома и квартиры). Только их как-то очень сложно найти в Москве. Заказывал у дистрибьютора, 1.5 месяца ждал.