Generally Inverse time overcurrent relays with Definite Minimum Time feature (IDMT. relays) are used in practice. There are many types of such relays available in relay-. market, viz. normal inverse relays, very inverse relays and extremely inverse relays. The. characteristics of these relays are shown in fig. 1.2. The other types of o/c relays are 3. second relay and 1.3 second relay. This means the time of operation of the relay is either. 3 or 1.3 second at Plug Setting Multiplier (PSM) equal to 10. Long time inverse relays. are used for o/c cum overload application. Voltage restrains o/c relays have their own. application.
Cleanliness Testing. Cleanliness Testing in the printed circuit board and assembly world encompasses the analysis of a specimen to determine the âtypeâ or âamountâ of a contaminant material. This contaminant material can be potentially anything; the material can be large or small and can be unknown, known, expected, or unexpected to the analyst or the requestor.
At-home STI testing. Gaining acceptance and popularity are at-home test kits for certain STIs, such as HIV, chlamydia and gonorrhea. For home STI testing, you collect a urine sample or an oral or genital swab and then send it to a laboratory for analysis. Some tests require more than one sample. The benefit of home testing is you're able to collect the sample in the privacy of your home without need for a pelvic exam or office visit. However, tests done on samples you collect yourself may have a higher rate of false-positive results, meaning the test indicates you have an STI that you really don't have.