Distribution networks are facing unprecedented challenges. Increases in demand,
distributed generation, use of electric vehicles and heat pumps all require a new
methodology of network management and control. The Kelvatek Low Voltage active
network management system provides the monitoring, communications and control
functions to help utilities create an LV network for the future.
WEEZAP is an LV vacuum circuit breaker combined with advanced measurement and
protection capability. The compact retrofit
design allows WEEZAP to be fitted directly to existing LV panels in replacement of the fuse. It is not necessary to replace the LV board itself. Fitting is simple and fast with a minimum of training.
The VCB design allows the WEEZAP to close and open the circuit at the LV substation either
locally or remotely. The WEEZAP can protect the network by opening the circuit breaker in
overload and fault conditions. Configuration
settings allow local automated re-closing;
alternatively reclose control can be via the
Network Management System (NMS).
WEEZAP Key features
Automatic meshing and reconfiguration of the network using embedded LV switches
Monitor power quality parameters at key points on the network
Communicate data to and receive control commands from the Network Management System (NMS)
Advanced protection and fault isolation and location capability
Add new levels of safety for the LV network
Easy to install, retrofit design
WEEZAP and LYNX measure voltage, current, power factor,
real power, apparent power, reactive power, frequency, THD and individual harmonics including magnitude and phase up to the 25th.
Data intervals can be configured to calculate the mean values over a range from 1 minute to 1 hour. 10ms minimums and maximums are also
recorded over this period.
Detect over and under voltage conditions/confirm
voltage within limits
Monitor currents for overload and assess duration and magnitude of overloads
Check Harmonic Levels on the network
Use power flow information at NMS level to make network configuration decisions
Capture high speed data to diagnose network problems, including incipient fault detection and location
The GATEWAY is the system’s wireless communications portal. DNP3 SCADA communications allows monitoring data and reclose control commands to be exchanged
between the NMS and remote WEEZAP and LYNX devices embedded in the network.