Load Bank 負載測試器
RGR 高壓接地電阻器
What Is A Load Bank?
(Dummy Load)
Load Banks are devices designed to provide electrical loads
for testing power sources such as
Generators and Uninterruptible Power Supplies (UPS).
Normal/Emergency Loads
Load Bank
Why Are Load Banks Necessary?
Maintain reliability of the Emergency Power System
by testing of the engine generator (s) under load.
Testing With A Load Bank
Will Help Insure   
That When You Have A
Power Failure   

Your Engine Generator Will Deliver
The Power It Is Required To Do!

Recommended / Required Testing Of
Engine Generators
Frequency
 Monthly
 Annually
Duration
30 – 40 Minutes
2 Hours
Capacity
50% to 60% of
Engine Generator Rating
100% of Engine Generator Rating
(Resistance/Reactance)
When it is unfeasible to apply actual load,
it is recommended to use a Load Bank
Hospital & Health Care Facilities
NFPA Required Testing Of
Engine Generators
Hospital And Health Care
Frequency
 Monthly
 Annually
Duration
30 Minutes
30 Minutes
Capacity
50% of Nameplate Rating
Of Engine Generator
100% of Nameplate Rating
Of Engine Generator
Please Realize . . .
Your Generator Is Only As
Good As Your Last Full Load
Test!
AC Kilowatts
Full Load Testing
Assures proper KW, Voltage and Frequency
AC Kilowatts
Full Load Testing
Confirms the Reliability of
components such as
Fuel & Cooling Systems
Another important reason to operate your
standby generator under load…
 Diesel…The Preferred Fuel For Standby

A Diesel Engine Generator Should Always
Have At Least A 50 – 60% Load
Connected While Running - - Or “Wet
Stacking” Could Occur - - -
“Wet Stacking”

Unburned Fuel Causes Carbon Build Up

Excessive Oil Consumption

Reduced Horsepower….Reduced Efficiency

Premature Failure
Wet Stacking Is Most Common . . .
Applications With Varying Loads
Engine Generators Sized For Pump Starting Currents
And
All Pumps Running At One Time
Wet Stacking Is Most Common . . .

Gen-Set Was Oversized For Future Growth
Or Redundancy
Emergency Bus
N + 1 Engine Generators
Types Of Load Banks
 Portable


Radiator/Duct Mounted
Permanent/Free Standing
Portable Load Bank
From 70KW To 500KW

Service & Rental
Applications

Mounted On Casters

Fit Through Doorways & Elevators

Lightweight
Portable Load Banks
From 70KW. . .
Portable Load Banks
. . . To 500KW
Portable Load Bank
From 1000KW To 2100KW

Trailer Mounted

Heavy Duty Dual Axle Trailers

Low Profile Horizontal Discharge (Up To 1000KW)

Vertical Discharge (1400KW TO 2100KW)

Optional Cable Reels
Portable Load Banks
Trailer Mounted
From 1000KW . . .
Portable Load Banks
Trailer Mounted
. . . To 2100KW
Portable Load Banks
Facility
Normal/Emergency
Loads
Tap
Box
Synchronizing Gear Arranged For
Spare Portable Engine Generator
- Or Portable Load Bank
Portable
Engine Generator
Portable
Load Bank
Radiator Mounted Load Banks


Dedicated Engine Generator Sets
Typically 50-60% Of The Generator Rating
Radiator Mounted Load Banks
From 15KW . . .
Radiator Mounted Load Banks
. . . To 1000KW
Permanently Mounted
Free-Standing Load Banks


Static Pressure May Be Too High For
Radiator Mount
Multiple Generator / Use Applications
Permanently Mounted
Free-Standing Load
Banks
Multiple Engine Generator Sets That Are Paralleled
Permanently Mounted
Free-Standing Load
Banks
Facility
Normal/Emergency
Loads
Load
Bank
Multiple Engine Generator Sets That Are Paralleled
Permanently Mounted
Free-Standing Load
Banks
Multiple Use
Engine Generator Sets
and UPS
Permanently Mounted
Free-Standing Load
Banks
Facility
Normal/Emerge
ncy Loads
Load
Bank
K
For
UPS Test
Multiple Use
Engine Generator Sets / UPS
Permanently Mounted
Free-Standing Load
Banks
From 50 to 2000 KW . . .
Traditionally,
Permanently Mounted
Load Banks Discharge Horizontally
Horizontal Discharge is the most
economical design to provide the best
protection against all environments
When Installing a Permanently
Mounted
Free-Standing Load Bank Consider. . .


Location Of Installation
Free Air Space for Cooling Air & Hot
Exhaust
 1KW-hour = 3,413 BTU

1,000 KW – hour = 3.4 Million BTU
Permanently Mounted
Free-Standing Load Banks
. . .To 2000KW
For Applications 700-2100 KW


Heat Dissipates
Vertically
Less Real Estate
Required
Load Bank Controls
Allows Step/Block Loading
Load Bank Controls
Located on
Load Bank
Load Bank Controls

Remotely

On Wall

In Paralleling Switchgear
Load Bank Controls
In Engine Generator Paralleling Switchgear
Load Bank Controls
Load Dump Circuit
Disconnects Load Bank When ATS Transfers
To Emergency
Avtron Load Shed Control
Supplement Actual Load To Attain;
50%
Supplemental
Load Bank
Actual
Load
To 60% Generator Rating
20% to 70%
30%
Load Bank Controls
Load Shedder Option
Dynamic
Facility Load
Load Shedder
Option
Load Bank
Load Bank Controls
Load Shedder Option
Engine
Generator
Desired
Loading
50% to 60%
Load Bank Load
Facility Load
Load Shedder Automatically Regulates Load Bank
Load Bank + Facility Load = Desired Loading On Generator
What Gives Avtron It’s Premier Reputation?
Built To The Highest Standards
Built To The Highest Standards
What Gives Avtron It’s Premier Reputation?
Materials/Duty/Workmanship
Aluminized Steel vs. Galvanized Steel
Galvanized
Rated to 500° F
Aluminized
Rated to 1250° F
What Gives Avtron It’s Premier Reputation?
Material / Duty / Workmanship

Heavy Gauge Aluminized Steel

Helidyne Resistor Elements

Stainless Steel Element Support Rods

Industrial Type Controls

CLF Type Overcurrent Protection

Differential Pressure Air Switches
Heavy
Duty
Enhanced
Safety
Controls
When Designing Reliability Into Your Emergency Power System
Consider Avtron Load Banks