查询词典 medium voltage

Usually, distribution networks operate in arborescence mode, so in the simulation of fault analysis the impact of faulty switch element on system reliability is apportioned to failure consequences of adjacent sections that connect to switch, and then an equivalent analytical model considering switch fault is proposed. Thus, not having to conduct the reliability analysis of switch element singly, the impact of switch element fault on system reliability can be calculated. Applying the proposed algorithm in RBTS-BDS6 system, RBTS-BUS4 system and actual medium-voltage distribution network to conduct reliability assessment, the results show that the proposed algorithm is superior in speed and possesses efficiency and engineering practicality.

配电网常具有树状运行特点，在故障解析模拟时，将开关元件故障对系统可靠性的影响分摊到连接开关的相邻分块的故障后果中，进而提出计及开关故障的可靠性等值解析模型，不需单独进行开关元件故障的可靠性分析即可计算其对系统可靠性的影响，应用该算法对RBTS-BUS6和RBTS-BUS4系统及实际中压配电网进行了可靠性评估，结果表明该算法有较明显的速度优势，具有高效性和工程实用性。

Hot post processing of medium voltage concavo-convex, die-cutting.

在烫后加工中压凹凸、模切。

ABSTRACT: A Rockwell PowerFlex7000 Variable Frequency Drive is used in JiuZHou Electric medium voltage drive test bay as the converter. Because of it belong to the current source drive, it has the function of the four quadrant, it can achieve the energy feedbackmake the motor brake,also has the advanced vector control technology, so it can achieve all kinds of load test, there are no other drives can replace it in simulate motor load. PowerFlex7000 drive has ability to achieve the full load test before the drive leave factory.

摘 要：罗克韦尔PowerFlex7000变频器在九洲中压变频实验站测试系统中作为变流逆变器使用，由于本身属于电流源型变频器，具有四象限运行功能，能够实现能量的回馈和对电机的制动，先进的矢量控制技术，可以实现各种复杂多变的负载特性，在模拟电机负载方面起到了其他变频器无可替代的作用，实现了变频器出厂之前的满负荷测试。

ABB will supply Ergon Energy with UniGear ZS1 and ZS3.2 medium voltage switchgear for the utility's 11 kV and 22 kV distribution systems and 33 kV sub-transmission system.

ABB将为Ergon Energy 电厂11千伏和22千伏配电系统以及33千伏中压输电系统提供UniGear ZS1 以及 ZS3.2 中压开关柜。

It is intended for radial and looped low-and medium-voltage circuits.

该设备的目的就是为了判定径向和环形的低、中电压电流短路。

A simultaneously harmonic voltage measurements from a magnetic potential transformer and a capacitor divider on a medium voltage bus show a good frequency response of PT.

对一组PT信号和同一母线的电容分压器分压信号进行谐波比对测量分析表明，中压系统的电磁式电压互感器有较好的频率响应特性。

The contract also includes protection and control systems as well as medium-voltage and low-voltage switchgear.

合同还包括了保护和控制系统，以及中压和低压开关柜。

Compared with the traditional medium-voltage-trigger thyristor, the new structure not only has a lower trigger voltage, but can also provide better ESD protection under both positive and negative ESD zapping conditions.

相比于传统的中等电压触发晶闸管，这一新结构不仅具有更低的触发电压，而且在正向和反向两种静电测试下均具有更好的静电保护能力。

Ground-fault protection of medium-voltage and high-voltage systems has been applied successfully for years using ground current relays.

接地故障保护的中压和高压系统已应用多年，在成功地使用接地电流继电器。

This series of instruments for low-voltage, medium voltage, high-voltage switchgear and distribution systems, central station monitoring system, generator set systems, building automation systems, energy management system, such as factories, able to measure three-phase three-wire, three-phase four-wire system current, voltage, active power, reactive power, apparent power, active power, reactive power, power factor, frequency, voltage triangular openings, the largest open-shaped voltage power parameters, at the same time with a remote, remote control function.

该系列 仪表适用于低压、中压、高压开关和配电系统、中心电站监测系统、发电机组系统、楼宇自控系统、工厂能量管理系统等，能够测三相三线，三相四线系统的电流、电压、有功功率、无功功率、视在功率、有功电能、无功电能、功率因数、频率、开口三角形电压、最大开口形电压等电力参数，同时带有遥信、遥控功能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。