The Electrical Harmonizer–Automatic Voltage Regulator
• Reduced Energy Cost, Consumption & Peak Power by up to 12%
• Reduced Greenhouse Gas emissions
•Increase life expectancy of electrical equipment •Measurement & Verification with an accuracy
of ±4% 95% of the time
About the Technology
The Electrical Harmonizer–Automatic
Voltage Regulator is an on-load automatic
electronic tap changer with a high efficiency
autotransformer that regulates voltage to
the optimal level.
There is an optimal minimum voltage level
below the primary level (600V CA, 480V US,
400V EU) where lights, motors, etc, will
operate comfortably with no effect on their
practical performance. At 5% below the
primary voltage (570V CA, 456V US,
380V EU) these loads are still within
manufacturer’s specifications but will work
with less waste heat, longer life, a lower
carbon foot print and less energy. However,
there are two factors preventing the power
company from delivering the minimum
optimal voltage to commercial and
industrial facilities: line loss resistance and
peak power. Power is distributed from a
utility substation at a higher than necessary
voltage level to ensure that the last building
on the grid receives power above the
minimal voltage level.
Legend Power Systems provides a simple
and effective technology solution that
allows qualified commercial and industrial
facilities to reduce their voltage to the
optimal minimum in-spec level, without
any worry about going too low when the
power grid fluctuates.
If a facility measured their incoming
voltage and found that it was quite high,
they could install a transformer that
would step down the incoming voltage
by a certain percentage. This “hard tap”
transformer solution has been available
for decades. However, if the grid power
fluctuated down, the percentage reduction
is “fixed” and the voltage can drop too low,
causing a brown out.
The Automatic Voltage Regulator
continually monitors a facility’s incoming
voltage level and automatically selects the
correct tap setting on the autotransformer
to ensure power is always entering the
facility at an optimal level. If grid voltage
levels drop below the minimum optimal,
the system is immediately bypassed
ensuring that the energy flow to your
building is never negatively affected.
The Problem – Line Loss Resistance & Peak Power
Power Substation
871 kW
851 kW
830 kW
809 kW
788 kW
CA
US
EU
630 V
504 V
420 V
615 V
492 V
410 V
600 V
480 V
400 V
585 V
468 V
390 V
570 V
456 V
380 V
The Solution – Voltage Optimization with an Intelligent Transformer
Power Substation
826 kW
795 kW
788 kW
788 kW
788 kW
CA
US
EU
590 V
470 V
395 V
575 V
460 V
385 V
570 V
456 V
380 V
570 V
456 V
380 V
570 V
456 V
380 V
Product Specification Sheet
Product Number 400
500
600
700
800
900
1000
Maximum Primary Voltage Options
600, 480, 400*
Frequency (Hz) Options
60, 50*
Taps
–2% –4% –6%
Automatic Bypass (0%)
Yes
Tap Change MethodZero Crossing, On-Load, Fully Automatic, Processor Controlled, Electronic
THD (v) on Tap Change
<0.5%
THD (current) on Tap Change
<2.0%
Efficiency
99.89%
Ambient Temperature
0°C to 40°C – relative humidity 0 – 95%
Cooling MethodConvection
System Configuration
3 phase, 4 wire input/output
Switching speed (msec)
<100
Repetitive Full Range Tap Changing Interval (Sec)
30
Non Repetitive Tap Changing Interval (Sec)
10
Coil ConstructionForm
Insulation Class
180 (H)
Installation MethodsFloor Mount, Ceiling Mount, Seismic Frame, Split Module
Maximum System Load Current Rating (Amps)
400*
500
600*
700*
800
900*
Harmonizer Current Rating (Amps)
400, 300*
400
500
750
750
750
System / Breaker Current (Amps)
400
500
600
700
800
900
Reg coil Ω @ 25°C / 6%
0.105
0.094
0.084
0.049
0.049
0.049
% Impedance @ 115°C
0.16
0.16
0.17
0.18
0.18
0.18
Temp rise @ Full Load
38
38
39
42
42
42
1000*
750, 1000*
1000
0.032
0.22
43
Mechanical (Approximate – will vary with installation configuration)
Weight (kg/lbs)
Width (mm/in)
Depth (mm/in)
Height (mm/in)
355/783
813/32
660/26
915/36
355/783
813/32
660/26
915/36
380/838
813/32
660/26
915/36
604/1332
813/32
660/26
1219/48
604/1332
813/32
660/26
1219/48
604/1332
813/32
660/26
1219/48
604/1332, 702*/1548
813/32
660/26
1219/48
Harmonizer – AVR is classified as Industrial Control Equipment UL 508.
Component certification is under UL 1561 US standards, and C22.2 No 47, Canadian standards. UL file number E228073.
*Available in 400V 50Hz
Single Line Diagram
UTILITY PAD MOUNT
TRANSFORMER
MAIN SW.
F DISCONNECT
800A
600/347V MAIN DISTRIBUTION PANEL
RATED AT 800A CONT.
UTILITY
METERING
M
C/B
HVAC & FANS
LEGEND POWER
HARMONIZER
800A
400A
800 AMP
200A
AVR
UTILITY FEED
LIGHTING
WAREHOUSE &
WORKSHOP
208V
DISTRIBUTION PANEL
ELEVATOR
SPARE
LIGHTING
347 / 600 V (CA)
277 / 480 V (US)
230 / 400 V (EU)
600A
300 KVA
208/120V
TRANSFORMER
POWER
LIFE
SYSTEMS
Other Installation Splice/cut-in locations are available
TRANSFER SW
legend power systems inc. www.legendpower.com electrical energy conservation
EMERGENCY GEN