|
发表于 2023-8-4 15:44:14
|
显示全部楼层
这个,估计是niagara的power crrection的功能,给电表造成误判。解决方式很简单,不适用时候不需要关机,把后面的power crrection开关打到standby就行。
截一段说明书。
The standby function was not created to place the connected system into a standby or switched mode, but
rather to place the Transient Power Correction Circuit into standby mode (disengaged), for instances when the
system is powered but not functioning (i.e., when there is no signal present). This was implemented because
the Transient Power Correction Circuit creates a reactive current draw of as much as 9 to 10 amps RMS at idle
(real world draw is a small fraction of an amp), and electrical technicians who connect a current probe to a
product such as this are frequently alarmed: They suspect that the product is either broken or that it is drawing a
distressingly high amount of current from the wall outlet (akin to a power amplifier left in full operational mode).
This is actually far from the truth. If the Niagara 5000 was consuming that much current (or even 30% of that
level), it would need to dissipate the energy loss in heat. It would be quite warm (even hot) to the touch, just
like most power amplifiers while in operation. In fact, the Niagara 5000 runs cool, precisely because this current
reading is false. The circuit utilizes massive capacitive reactance across the AC line, which, akin to a battery, will
both absorb and immediately release the current several times per second. Further, when incorporated with
11
power supplies such as those found in power amplifiers, the current readings actually come down. This is due
to what’s known as a vector load, and it’s quite dynamic in an audio/video system. In this scenario, there is one
thing that can run somewhat warmer than it might otherwise: the AC cord that supplies power to the Niagara
5000. This is because the wiring and the circuit breaker that supply power to Niagara 5000 simply look at RMS
current and do not distinguish between reactive loads, resistive loads, or inductive loads, but your utility does. |
|