Office Building - Monitoring System for Power Receiving and Transforming Facilities


The system performs electricity monitoring of power receiving and transforming facilities in the head office building of a certain company, along with monitoring and operation of air conditioning, lighting equipment, elevators and other facilities to achieve comprehensive building management.

Disaster prevention facilities are also managed to aid in safe building management in the event of a disaster.

Background to Introduction and Challenges Faced

The system was introduced in a large building for the first time as a building management system pursued in collaboration with other companies.

In addition to electrical equipment, functionality as an integrated building management system covering elements such as air conditioning and elevators was also adopted.

Effects of Introduction

Through introduction of the system, complex outage restoration control in the event of a disaster can be handled, and energy can be saved through the automated control of lighting equipment.

Furthermore, the system can be freely modified, making maintenance easy even after the start of operation.

System Configuration



Monitoring and Operational Features

BACnet Collaboration

By working with an HIM from another company using the BACnet communication protocol, the facilities are collectively monitored and operated through the HIM*.

BACnet stands for Building Automation and Control Network, and refers to a communication protocol standardized for building automation (BA) and control networks.

  • *HIM: Human Interface Machine The term is also referred to as HMI, or Human Machine Interface.

Outage Restoration Control

In the event of a power outage, circuit breakers are cut and cutoff control of equipment is performed based on the priority of each piece of equipment.

When power is restored, the circuit breakers reset and equipment is re-energized.

Group Start-stop Control

Equipment subject to start-stop control can be operated on the basis of pre-registered groups.

Alarm Display

When an equipment malfunction occurs, a real-time alarm is displayed on the monitoring screen, supporting early discovery of abnormalities. A per-device history of alarm triggering and restoration can also be displayed.


Trend Display

Product manufacturing status, equipment operational status and fault signals can be managed through a trend display.

Real-time trends covering periods of up to 24 hours and historical trends for up to 30 days are displayed.


Management Support Features


Data collected from equipment is managed in the form of daily, monthly and yearly reports.

In addition, printing at regular intervals or based on customer requests is also possible, allowing information on instantaneous values, segment average, maximum and minimum values, accumulated difference and cumulative on/off times to be ascertained.