3RV Molded Case Motor Starter Protectors up to 800 A General data Configuration The 3RV1 molded case motor starter protectors for up to 800 A are optimally coordinated and tested for combinations with 3RT contactors and, in starter combinations, with Sirius 3RU/3RB overload relays and SIMOCODE 3UF7. Detailed assignment ta- bles for the special voltages 440 V, 480 V, 550 V and 690 V are included in the brochure "SIRIUS Configuration". Temperature characteristic At higher temperatures it is necessary to take account of a re- duction in the maximum permissible rated uninterrupted current (derating).
The maximum rated operational currents for the different 3RV1 molded case motor starter protectors are listed in the following table. These permissible loads apply for the molded case motor starter protectors with standard terminals, with front-extended terminals (see "Accessories") and with front-extended cable ter- minals (see "Accessories") . Prevention of unintended tripping In order to prevent unwanted tripping of the molded case motor starter protectors, they should always be connected such that current flows through all 3 main current paths.
Short-circuit protection If a short-circuit occurs, the short-circuit releases of the 3RV1 molded case motor starter protectors isolate the faulty load fee- der from the network and thus prevent further damage. Motor starter protectors with a short-circuit breaking capacity of 50 kA or 100 kA are virtually short-circuit resistant at a voltage of 400 V AC, since higher short-circuit currents are not to be ex- pected in practice. Motor protection The tripping characteristics of the 3RV10 molded case motor starter protectors are designed mainly to protect induction motors. If required, derating values for rear-accessible terminals (see "Accessories") can be obtained from "Technical Assistance":
Either by e-mail to: technical-assistance@siemens.com Or on the Internet: http:/www.siemens.com/automation/service&support The motor starter protectors are therefore also referred to as motor-protective circuit breakers. Short-circuit protection for starter combinations The 3RV13 molded case motor starter protectors for starter com- binations provide short-circuit protection for combinations of a contactor and overload relay. On overload, the overload relay triggers the contactor, the motor starter protector remains closed. Only when a short-circuit occurs in the feeder does the motor starter protector trip as well.
The molded case motor starter protectors for starter combina- tions must always be used in combination with an overload relay because the motor starter protector alone cannot protect the motor and itself against overload. Altitude The molded case motor starter protectors can be used without restriction at altitudes up to 2000 meters. At higher altitudes it is important to take account of the amended characteristics of the motor starter protector according to the following table. 45 Siemens · 2009 Molded case motor starter protec- tors Max. rated current I e Max. rated operational current I e at 45 °C 50 °C 55 °C 60 °C 65 °C 70 °C A A A A A A A 3RV1. 5 32 32 32 32 32 32 32 3RV1.
6 250 250 250 250 250 230 220 3RV1. 7 400 400 400 400 400 376 352 630 630 580 552 530 504 479 3RV1. 8 630 630 630 565 598 583 567 800 800 800 780 760 740 720 Altitude m Max. rated operational voltage Ue V AC Max. rated operational current I e in % of In 2000 690 100 3000 600 96 4000 500 93 5000 440 90