品牌:施耐德 | 规格: | 产地:法国 |
PR 3532 Valve positioin transmitter
PR 4114 Universal transmitter
PR 4116 Universal transmitter
PR 4131 Universal trip amplifier
PR 4222 Universsl If converter
PR 4501 Display programmingfront
PR 4590 ConfigMate
PR 5102 RTD transmitter
PR 5104A Repeater power supply
PR 5104B Ex repeater power supply
PR 5105B Ex-isolated driver
PR 5106A HART transparent repeater
PR 5106B HART transparent repeater
PR 5107B HART transparent driver
PR 5111** Universal transmitter
PR 5114A Programmable transmitter
PR 5114B Programmable transmitter
PR 5115A Signal calculator
PR 5115B Signal calculator
PR 5116A Programmable transmitter
PR 5116B Programmable transmitter
PR 5131A 2-wire programmable transmitter
PR 5131B 2-wire programmable transmitter
丹麦PR
PR 5132** 2-wire transmitter-repeater
PR 5202B Pulse isolator
PR 5203B Ex solenoid alarm driver
PR 5222** Programmable If converter
PR 5223A Programmable fI-ff converter
PR 5223B Programmable fI-ff converter
PR 5225 Programmable fI-ff converter
PR 5331A 2-wire programmable transmitter
PR 5331D 2-wire programmable transmitter
PR 5333A 2-wire programmable transmitter
PR 5333D 2-wire programmable transmitter
PR 5334A 2-wire programmable transmitter
PR 5334B 2-wire programmable transmitter
PR 5335A 2-wire transmitter with HART protocol
PR 5335D 2-wire transmitter with HART protocol
PR 5343A 2-wire level transmitter
PR 5343B 2-wire level transmitter
PR 5350A PROFIBUS PA FOUNDATION Fieldbus transmitter
PR 5350B PROFIBUS PA FOUNDATION Fieldbus transmitter
PR 5420B Ex power supply
PR 5511** Universal indicator
PR 5514** Programmable LED indicator
PR 5515** Programmable LCDLED indicator
PR 5531A Loop-powered LCD indicator
PR 5531B Loop-powered LCD indicator
丹麦PR 下列情况规定值班员可自行处理:换灯泡和;选择直流接地。、在三相四线制供电系统中,为什么不允许一部分设备接零,而另一部分设备采用保护接地?答:当采用保护接地的用电设备一相碰壳时,由于大地的电阻比中线的电阻大的多,经过机壳搪地极和地形成了短路电源、往往不足以使自动开关和动作,而接地电源,又使电源中性点电位升高,使所有接零线的电设备外壳或柜架出现了对地电压,会造成多的触电机会。、试电笔有哪些用途?答:试电笔除能测量物体是否带电以外,还有以下几个用途:可以测量线路中任何导线之间是否同相或异相。