QUESTION: How long does it take on load for the tripping times of 3RV1 and 3RV2 motor starter protectors and 3RU1 and 3RU2 overload relays to be reduced to 25% from the cold state when pre-loaded? ANSWER: The tripping time is reduced to 25% for 3RV1 and 3RV2 motor starter protectors and 3RU1 and 3RU2 overload relays during normal operation, i.e. when loaded with set current after approx. 1 hour. Once the load current is switched off it then takes up to 1 hour to reach room temperature (i.e. 100% tripping time). Heating up and cooling down are carried out after an e function.