Point-on-Wave Switching

Point-on-Wave (P-o-W) switching prevents high inrush currents commonly associated with the mechanical switching of transformers, reactors and capacitors. It offers a cost-effective and compact electronic solution to switching transients and can be installed at initial build stage or as a retrofit to existing circuit breakers.

...

What is Point-on-Wave Switching?

Point-on-Wave switching offers a cost-effective and compact electronic solution that addresses the root cause of switching transients: it eliminates the random nature of mechanical switching by using precision timing to control the exact moment of conduction that results in the minimum inrush current possible. Point-on-Wave switching can be applied to transformers, capacitors, reactors and long lines. It offers a great solution to grid compliance and/ or site stability issues related to the switching of such loads, such as ER P28. Enspec is the official UK and Ireland partner and distributor of Vizimax Inc, Canada, and a recognised Centre of Excellence for their world leading SynchroTeq Controlled Switching Devices.

Point-on-Wave Switching

Requirements

The SynchroTeq is a manufacturer agnostic solution, meaning in can be applied to any stored energy mechanism circuit breaker. It is an electronic, LV solution, making it very easy to install during the initial build stage or as a retrofit solution. External device requirements are minimal, most of the time the required CT and VT devices are already installed for standard protection and monitoring purposes.

We hold a constant stock of SynchroTeq devices, ensuring for a short lead time and fast resolution to any grid code compliance issues.

Point-on-Wave Switching
Point-on-Wave Switching
Point-on-Wave Switching
Point-on-Wave Switching

Our Solutions

The SynchroTeq comes in two versions, the SynchroTeq MVX for voltages up to 66kV, and the SynchroTeq Plus for voltages greater than 66kV. The functionality of each device is fundamentally the same:

Transformer Switching - SynchroTeq effectively mitigates high inrush currents and the associated voltage drops during transformer energisations. It does this through the application of a patented residual flux calculation algorithm to determine the optimum energisation point.

Capacitor Switching - SynchroTeq effectively mitigates current and voltage transients when energising capacitors. Through monitoring of the capacitors residual charge, not only can it reduce transients for discharged capacitors, but also partially discharged capacitors. This allows for close-open-close (COC) cycles within milliseconds providing dynamic reactive power compensation and constant availability for voltage support.

The SynchroTeq can similarly be applied to shunt reactors and long lines to alleviate voltage or current transient issues.

check

Case Study: SSEN / Mott MacDonald LEAN PROJECT

Enspec is working on a Low Energy Automated Networks (LEAN) project with SSEN aimed at reducing electrical losses on 33kV/11kV networks.

Read more
check

Case Study: AIKENGALL II WIND FARM

Reducing inrush current to reduce voltage dip when the transformer is energised

Read more

Call us today on +44 (0) 1744 610940