Protection apparatus plays an important role in the low-voltage electrical distribution systems.
保护电器在低压配电系统中占有重要地位。
They provide system security and immediate reliable low level ground fault detection on three-phase AC resistance grounded or grounded electrical distribution systems.
此类继电器能够增加系统安全性，并对三相交流接地电阻或接地配电系统进行可靠的低级接地故障检测。
The major components of our energy systems, such as fuel production, refining, electrical generation and distribution, are costly installation that have lengthy life span.
我们能源系统的主要组成部分，如燃料生产、提炼、发电和分配，用的是昂贵的、使用寿命较长的装置。
Power systems operators monitor and operate switchboards and related equipment in electrical control centres to control the distribution of electrical power in transmission networks.
电力系统操作员监视和操作交换机及电气控制中心的相关设备，控制传输网络中电力的分布。
Electrical power line and cable workers construct, maintain and repair overhead and underground electrical power transmission and distribution systems.
电源线和电缆工人建造，维护和修复架空线和地下电力传输和配电系统。
Describe the basic function of the maintenance department in hospitality facility, water distribution systems, air-conditioning, and electrical systems.
描述酒店设备维护部门的基本功能，包括供水分配系统，空调和供电系统等。
Scope This manual describes protection techniques for electrical power supply and distribution systems.
范围本手册介绍了电力供应和分配系统的保护技术。
To familiar with all the electrical power distribution and lighting systems, with electrical operation certificate.
了解饭店机电系统以及机电系统的运行要求和特性，具有电工操作证。
To familiar with all the electrical power distribution and lighting systems, with electrical operation certificate.
了解饭店机电系统以及机电系统的运行要求和特性，具有电工操作证。
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