Bender CD440 Manuale di avvio rapido

Sfoglia online o scarica il pdf Manuale di avvio rapido per Relè Bender CD440. Bender CD440 8. Multifunctional voltage relay

Quickstart

VMD461 with CD440

Multifunctional voltage relay

Intended use

The multifunctional voltage monitoring relay VMD461 monitors frequen-

cies, undervoltages and overvoltages in DC, AC and 3(N)AC systems. The

phase voltages and/or line-to-line voltages are measured as r.m.s. value

and are continuously shown on the device display. The measured value re-

quired to trigger the alarm relay is stored. The VMD461 features additional

measuring functions for:

ROCOF df/dt

 

Vector shift monitoring

 

Unbalance monitoring

 

Phase sequence monitoring

 

The corresponding ANSI codes for all available measuring functions are provided.

Configurable delay times allow considering special installation-specific properties (e.g. device-specific

start-up procedures). The VMD461 requires an external supply voltage.

The optional use of a CD440 coupling device extends the voltage range that can be monitored to DC/

3AC 1200 V or 1AC/3NAC 690 V. Any other use than that described in this manual is regarded as impro-

per. The quickstart does not replace the manual of the device. Download:

Safety instruction

Danger of electrocution due to electric shock!

Touching live parts of the system carries the risk of:

 

DANGER

 

Before installing and connecting the device, make sure that the installation has

been de-energised. Observe the rules for working on electrical installations.

Dimension diagrams VMD461 (left) und CD440 (right) in mm

VMD461_D00314_00_Q_XXEN/10.2018

An electric shock

Damage to the electrical installation

Destruction of the device

108

www.bender.de/manuals

71,7

93,0