3-phase voltage monitor relay
24 March 2004
Circuit & System Protection
Citels' VM230/TRI is designed to continuously control a 3-phase 230/400 V network in order to detect any kind of AC failures that may disturb or destroy sensitive equipment. Some of these are overvoltages, undervoltages, a missing phase, phase inversion or frequency shifts.
In case of failure detection, the VM230/TRI will activate an output dry contact in order to drive an external line contactor and to disconnect the internal network from the external electrical grid. After the fault has cleared, it will reset automatically and reconnect the AC line through the contactor. The VM230/TRI is equipped in front side with LCD display for: permanent display of the AC voltage of each phase, information of the type of failure detected, tuning the thresholds (voltage detection and reset time).
The product is a modular type to fit on standard symmetrical DIN rails. To provide maximum safety, especially in case of lightning surge voltages, it is recommended that an AC Surge Protector (CITEL DS44 type) is installed upstream of the VM230/TRI.
Further reading:
Clearing the Static: ESD and installation: A durable antistatic solution
Actum
Circuit & System Protection
ESD flooring provides a reliable, long-term solution for managing static electricity by safely dissipating static charges through the floor to a designated ground point.
Read more...
Why wait to automate
NewElec Pretoria
Circuit & System Protection
NewElec’s initiative helps you gain operational visibility via HMI or PLC by retrofitting intelligent motor protection relays without replacing MCCs or rewiring the plant.
Read more...
Clearing the Static: Effectively control static in your workplace
Actum
Circuit & System Protection
Controlling electrostatic discharge in the workplace is crucial to protect sensitive electronic equipment from damage. Implementing an ESD control program involves various measures and tests.
Read more...
Clearing the Static: Staying grounded: Ensuring effective ESD control
Actum
Circuit & System Protection
To maintain reliable electrostatic discharge control, regular testing and accurate measurement are essential, with grounding products and ESD testing equipment being vital.
Read more...
Clearing the Static: ESD component safety in storage and transportation
Actum
Circuit & System Protection
Conductive containers create a Faraday cage effect, safely channelling electrostatic charges away from the components inside.
Read more...
Clearing the Static: Conductive foot, heel and shoe grounders
Actum
Circuit & System Protection
Conductive foot, heel and shoe grounders are used in electrostatic discharge protected areas to provide a path to ground for static electricity.
Read more...
LED driver for industrial power supply indication
Altron Arrow
Editor's Choice Circuit & System Protection
A simple and small solution for driving an LED to provide visual feedback in the presence/absence of a system’s power using a chip not originally designed for this purpose.
Read more...
Clearing the Static: Cleaning in an ESD-protected area
Actum
Circuit & System Protection
Cleaning in a protected electrostatic discharge area is a critical task to maintain the integrity of sensitive electronic components and prevent damage caused by static electricity.
Read more...
Clearing the Static: Key principles of ESD control in electronics manufacturing
Actum
Circuit & System Protection
Effectively managing electrostatic discharge is essential in electronics manufacturing to ensure not only product reliability, but also worker safety.
Read more...
Clearing the Static: Three steps for a dry ESD packaging system
Actum
Circuit & System Protection
For optimal storage, it’s essential to complete the dry-packaging system by adding Desiccant Packs and Humidity Indicator Cards.
Read more...
printer friendly version