A.

Project Scope.
Notes and Photos by Able Group Inc.

Morton Building Outage


B.

C.

D.

E.

F.

G.

H.

I.

J.

Commercial Facility Services for Every Property Concern - Contact Able Group Inc.

Project Scope for:


The Facts about the
Sub-Station
Power Interruption:

 


 

PHOTO  A.

This 1600 Amp Main Circuit Breaker tripped out on "Ground-Fault".

It is known as Main #2.

This situation was not caused by "over-load" but due to a hazardous condition when power is leaking to ground.

This circuit breaker tripped out twice:
Once during the electric storm and once during the process of turning the building power back on (one breaker at a time).

In both cases Main #2 sensed a "ground-fault/power leak" and shut down.

PHOTO  B. 

These circuit breakers were affected by the interruption.

It is known as
Switchboard A.

ID Starting at the Top:
*Basement Mechanical Room
*Spare-Not-in-use.
*2ND Floor Electrical Room.
*Generator System which is the bottom circuit breaker.

This breaker provides utility power to the Generator System and is the beginning of the circuit which was found to have caused the original outage.

This breaker did not trip.

When turned on without any load, it tripped Main #2 (Photo A.) because it was sensing "ground fault" somewhere in the circuit.
An unusual buzzing sound was heard at the same time.
 

PHOTO  C. 

The *Generator System
Begins Here:

Close-Up photo of the bottom circuit breaker
800 Amp, 480Volts
tested OK.
 

PHOTO  D. 

*Generator System:
The power cables to the circuit exit the substation cabinet directly into the ground through the concrete pad.

PHOTO  E. 

*Generator System:
These cables travel below the ground to the building exterior wall.
They rise out of the ground and enter the building above the large Conference Rooms, (note the two large conduits in the middle)
.

PHOTO  F. 

*Generator System:
Close up of all power conduits entering the building above the large Conference Rooms.

PHOTO  G. 

*Generator System:
These conduits enter the Main Electrical Room in the Basement.
 

PHOTO  H. 

*Generator System:
Conduits to the Automatic Transfer Switch "ATS".

They enter an intersecting splice box which combines the power cables for:
Utility Power
Generator Power
Essential Loads

PHOTO  I. 

*Generator System:
Inside the "ATS" intersecting splice box:
Utility Power
Generator Power
Essential Loads
 

PHOTO  J. 

*Generator System:
Generator Power conduits.

Generator Failed to Operate.
Loss of Power to Essential Circuits.
The UPS System batteries could not support the essential circuits for the length of time without this Generator.

 

 

 

Information Link:
http://forums.
mikeholt.com/showthread.
php?t=148214