（感谢陈建业教员提出的问题，感谢郑可教员和李任重工程师的技术支持。）
从 A330 开始，空客把大部分机组用不到的 C/B 都放到了电子舱，只留一部分机组可能会用来复位的放在了顶板上，并重新命名为 RESET BUTTON，以作区分。A350 也延续了这个设计，且由于更先进和集成的航电设计，A350 的大量 C/B 都改为了新的 Solid State Power Controllers (SSPCs) 和 Remote Control Circuit Breakers (RCCBs)。
如果系统监控到电子舱的 C/B 跳出了，会在 ECAM 的 C/B 页面显示 C/B 的具体信息。注意，顶板的 RESET BUTTON 拔出是不会触发这个警告的。
C/B 跳出后，两个机型也都会触发 ECAM 警告 ELEC C/B TRIPPED，A330 还有一个[QRH] C/B TRIPPED 程序。
A330 的程序中（QRH 和 ECAM）虽然要求不要接通跳出的 C/B，但又说如果机组确认对于继续安全飞行是必要的，也可以重新接通。但实际运行中，还没有遇到机组到电子舱接通 C/B 的案例。
之前 A330 在哈尔滨地面上机后遇到 LGCIU 1 不工作，经过与 MCC 沟通，到电子舱复位了 L63 C/B，消除了警告，后续正常。但并不确定之前是否跳出过 C/B TRIPPED 警告。
而 A350 的程序中只有"机组意识"一句话，并没有机组可以重新接通的说明。
空客在 TR 中证实，对于 A330，机组确实可以在特殊的必要情况下去接通自动跳出的 C/B。而对于 A350，由于全新的航电设计和技术，SSPC 和 RCCB只能通过维护终端（就是第三成员座那台电脑）来操作，机组是不能操作的，所以机组并不能重新接通跳出的 C/B。
关于新老 C/B，这里从李任重工程师给的资料里截取一些图来直观感受一下：
TechRequest 原文
Q:
There're 2 differences.
Firstly, A330 has ECAM C/B TRIPPED and [QRH] C/B TRIPPED procedure, while A350 only has ECAM C/B TRIPPED procedure. The inhibition flight phase in both ECAM alert are the same. For A330, if some C/B tripped in those inhibited phase, crew can still refer to QRH. Is there no other way to refer for crew of A350?
Secondly, for A330, whatever in ECAM or QRH, there's NOTE of limit and requirement of reengaging the tripped C/B:
QUOTE
Do not reengage a C/B that has tripped by itself, unless the Captain judges it necessary
to do so for the safe continuation of the flight. This procedure should be adopted only as a last resort, and only one reengagement should be attempted. On ground, do not reengage the C/B of the fuel pump (s) of any tank. For all other C/B, if the flight crew coordinates the action with maintenance, the flight crew may reengage a tripped C/B, provided that the cause of the tripped C/B is identified.
QUOTE END
However, nothing for A350, only "Crew awareness". Does it mean we can reengage any C/B just when we consider it is necessary?
Are those differences due to some system advance of A350?
A:
We have reviewed your request and would like to provide CSC with the following information:
Firstly, for the A330 aircraft, Airbus would like to confirm that the flight crew may reengage a tripped C/B when necessary based on the flight crew judgment. This is as per stated that “the Captain judges it necessary to do so for the safe continuation of the flight”.
However, for the A350 aircraft, the possibility to reset the C/B is not offered to the flight crew during flight due to the introduction of the new C/B technologies that are the Solid State Power Controllers (SSPCs) and Remote Control Circuit Breakers (RCCBs). The management of these contactors is done via the maintenance terminal of the aircraft, through the power distribution control management application. Therefore, the management of these electrical contactors cannot be done by the flight crew during flight.
However, it should be noted that the reset pushbutton on the overhead panel of the A350 aircraft can be used if necessary, and when authorized by the reset procedures in the FCOM.
