| Utility Selects Majorsine for Network Upgrade The North American Transmission and Distribution (T&D) Power Grid is being
modernized with state of the art equipment to keep up with growing power
demand. A Multi State T&D Company incorporated new automation systems and a
private network. The telemetry and console equipment to be deployed is
available only in standard 120 VAC input in contrast to the automation system
which is equipped with redundant power AC and DC power supplies. Following best
engineering practices all equipment is to be on a common reliable power source
for planned and involuntary shutdowns.
The most important factor in the back-up power system design is the length of
runtime during power outages. Substation Engineering for the utility specified
a DC power plant to back-up the entire system. This design included inverters
to support the AC only console and telemetry equipment.This utility had a history of using ferro-resonant inverters which required
large rack space and a big footprint. In contrast, the Majorsine provides the
same output as the old style in only 2U rack space preserving valuable rack
space for additional equipment in the project. Increased efficiency of the
inverter allows better utilization of the DC power system. The Majorsine was
selected because it provides optimum space and power usage.
During normal operation, the Majorsine Power Inverter provides
filtered pure sine wave AC power to the console and telemetry
equipment because the client chose to operate in the integrated AC
Bypass Mode. The integrated static switch automatically
transfers to the DC source and gives the equipment hours of runtime
in the event the of substation grid outage. Once power is
restored the Majorsine transfers back to the client preferred state
of AC bypass mode.The T&D company engineer told the consulting firm “that they have been reviewing
network designs, and the thing they like the most was the Majorpower inverter
that we used and they will start using this for future company substations.” |
