Fri Jul 20 04:45:22 2018
Fri Jul 20 04:45:22 2018
LINETRAXX® VMD421H

LINETRAXX® VMD421H

  • 三相交流系统 0...500 V的欠电压、过电压和频率监视
  • 集成后备电源
  • 不对称、相位故障和相序监视
  • 可调启动延迟,响应延迟和释放延迟
  • 可选各种监视功能 < U, > U, < f, > f

多功能VMD421系列电压监视仪被设计用于监视频率、欠电压、过电压和三相交流系统中两个阈值(窗口鉴别器的功能)之间的电压。电压测量是真实有效值。电流测量值连续显示在液晶屏上。存储报警继电器激活的测量值。由于可调的响应时间,可以考虑特定于设备的特性,如特定于设备的启动过程、短时电压波动等。监视仪需要外部电源电压。

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  • Undervoltage, overvoltage and frequency monitoring in 3(N)AC systems 70…500/288 V
  • Without external supply voltage
  • Integrated energy backup
  • Asymmetry, phase failure and phase sequence monitoring
  • Various monitoring functions selectable U, f
  • Start-up delay, response delay, delay on release
  • Adjustable switching hysteresis
  • r.m.s. value measurement (AC+DC)
  • Digital measured value display via multi-functional LC display
  • Preset function (automatic setting of basic parameters)
  • LEDs: Power On, Alarm 1, Alarm 2
  • Measured value memory for operating value
  • Continuous self monitoring
  • Internal test/reset button
  • Two separate alarm relays (one changeover contact each)
  • N/C or N/O operation and fault memory behaviour selectable
  • Password protection for device setting
  • Sealable transparent cover
  • Two-module enclosure (36 mm)
  • Push-wire terminal (two terminals per connection)
  • RoHS compliant
  • Monitoring of voltage-sensitive machines and electrical installations
  • Switching machinery and equipment on and off at a certain voltage level
  • Monitoring of stand-by and emergency supply systems
  • Supply voltage monitoring of portable loads
  • Protection of three-phase motors against phase failure and phase open-circuit
  • Transformer protection, asymmetrical load can be recognised

 

可选配件 LINETRAXX® VMD421H


TypeArt No.
Mounting clip for screw fixing (1 piece per device)B98060008

版本 LINETRAXX® VMD421H


TypeNominal system voltage Un*Response valueArt. No.**
VMD421H-D-33(N)AC 70…500 V, 15…460 HzAC 70…500 VB73010007
B93010007
* absolute values
**(B7… = push-wire terminal / B9… = screw-type terminal)

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