Power Meter

DLT645抄表：https://github.com/fzinfz/flask-DLT645

Voltages

https://en.wikipedia.org/wiki/Mains_electricity_by_country#Table_of_mains_voltages,_frequencies,_and_plugs - CN 220/380V 50Hz | UK 230V 50Hz | US 120/240V 60Hz

Power Connectors

https://en.wikipedia.org/wiki/IEC_60320#Appliance_couplers
C13/C14 and C15/C16 connectors for up to 15 A[10] (IEC maximum is 10 A)
C15/C16’s temperature rating is 120 °C rather than the 70 °C of the similar C13/C14 combination.
C19/C20 and C21/C22 connectors for up to 20 A[11] (IEC maximum is 16 A)

https://en.wikipedia.org/wiki/NEMA_connector

Industrial

https://en.wikipedia.org/wiki/Industrial_and_multiphase_power_plugs_and_sockets

Residual Current Device

https://www.theiet.org/forums/forum/messageview.cfm?catid=205&threadid=9258

RCD - Residual Current Device 
RCCB - Residual Current Circuit Breaker 
RCBO - Residual Current circuit Breakers integral Over current protection 
ELCB - Earth Leakage Circuit Breaker

RCD is the term that covers a family of devices.

RCCBs are RCDs without any overload protection.

RCBOs are RCDs with overcurrent protection included in the device.

CBRS are circuit breakers with residual current protection which may or may not be integral.

SRCDS are socket outlets with RCD protection.

PRCDS are RCDS built in to a plug.

MRCDS are independantly mounted devices that provide a signal to trip another device.

SRCBOS are sockets incorporating an RCD and overcurrent protection.

RCDs without overcurrent protection must be protected by a separate overcurrent device.

UPS

Compare: EEVBlog https://youtu.be/Fj7e3WGUKO8?t=521

Docs

常见电气元件: http://www.sohu.com/a/216349064_488169
导线趋肤效应和临近效应：http://www.sohu.com/a/221088726_488169

ABB低压产品目录： https://library.e.abb.com/public/3ed9d6e55176101f48257d46000d1d62/1SXF000032X2001_022011_OEM.pdf