| 摘要 |
FIELD: electrical engineering. ^ SUBSTANCE: proposed device designed for generating ac test current passed through apparatus under test, as well as for measuring current and operating time of such apparatus and for easy in-situ testing of overcurrent protective gear is, essentially, automatic control system closed by means of negative feedback through quantity under test (test current). It is provided in addition with switch, comparison unit, adjustment and correction unit, and selector switch. ^ EFFECT: improved transient characteristic and measurement accuracy of test current; facilitated procedure. ^ 1 cl, 1 dwg |
