VMD421H-D-3 BENDER

VMD421H-D-3 BENDER Voltage Monitor

Product information：

Brand：DANAHER                          Model number：VMD421H-D-3

Lead Time：3-day working da        Country of origin: Germany

Price: Please contact us                   Product weight：0.56kg

HS: 8517623990

Product technial information：

The voltage monitor VME421H monitors AC/DC systems in the frequency range of 

DC/15…460 Hz for undervoltage, overvoltage, underfrequency or overfrequency. 

Device variant -1 is suitable for the nominal voltage range Un = 9.6…150 V, device 

variant -2 for Un = 70…300 V. The supply voltage is taken from the nominal voltage 

being monitored Un.

In order to meet the requirements of the applicable standards, customised parameter 

settings must be made on the equipment in order to adapt it to local equipment and 

operating conditions. Please heed the limits of the range of application indicated in the 

technical data. 

• Voltage and frequency monitoring of single-phase machines and electrical installations

• Earth fault monitoring in medium-voltage systems via voltage transformers

• Monitoring of battery systems

• Switching machinery and equipment on and off at a certain voltage level

After connecting the device for the first time, the nominal system voltage will be determined

 (PrE run), and the response values for overvoltage and undervoltage as well as for 

underfrequency and overfrequency will automatically be set. When no voltage is determined

 within a nominal system voltage range (PrE run), the response values will be set to 

the minimum or maximum voltage. In this case, the message “AL not SET” appears on the 

display. As long as no button is pressed, a nominal system voltage is being searched cyclically 

(PrE run). If a button is pressed, the search will be interrupted and the message “AL not SET” 

disappears. In this case, the appropriate response values have to be set in the menu. 

When activating the frequency monitoring function, the preset frequency will automatically 

be stored.

Contact information：

Contact person：Luna Chen

Email Address:：sales6@saulplc.com

WhatApp： +86 13358378970

We look forward to your inquiry and will get back to you as soon as possible.

Related models：