Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Acme Electric
Transformer Seminar
Buck Boost Transformers
WHAT ARE BUCK-BOOST
TRANSFORMERS?
BUCK-BOOST TRANSFORMERS START OUT AS
ISOLATION TRANSFORMERS WITH
OUTPUTS FROM 12 TO 48 V...
PRIMARY SECONDARY
AUTOISOLATION
“ISOLATION” VS. “AUTO”
BASIC PRINCIPLE
CURRENT WILL FOLLOW PATH OF LEAST
RESISTANCE
PRIMARY & SECONDARY
HAVE THE SAME CAPACITY
BOOSTING CONNECTION COIL
VOLTAGES ADD
AUTO CONNECTION INCREASES
KVA CAPACITY
DATA NEEDED TO SELECT BUCK-
BOOST TRANSFORMER
1. SYSTEM PHASE
2. SYSTEM FREQUENCY
3. LINE VOLTAGE
4. LOAD VOLTAGE
5. LOAD ...
SELECTION EXAMPLE #1
1. 1-PHASE
2. 60 HZ
3. LINE - 189 VOLTS
4. LOAD - 208 VOLTS
5. LOAD - 4 KVA
1-PHASE 120 X 240 – 12/24
CHART
REFER TO 1-PHASE SELECTION CHART
IN SECTION 8 OF THE CATALOG ON PAGE
121
CONNECTION DIAGRAM
SELECTION EXAMPLE # 2
1. 1 - PHASE
2. 60 HZ
3. LINE - 208 VOLTS
4. LOAD - 240 VOLTS
5. LOAD - 60 AMPS
1-PHASE 120 X 240 – 16/32
CHART
REFER TO 1-PHASE SELECTION CHART
IN SECTION 8 OF THE CATALOG ON PAGE
122
CONNECTION DIAGRAM
SELECTION EXAMPLE # 3
1. 1 - PHASE
2. 60 HZ
3. LINE - 240 VOLTS
4. LOAD - 208 VOLTS
5. LOAD - 14 KVA
1-PHASE 120 X 240 – 16/32
CHART
REFER TO 1-PHASE SELECTION CHART
IN SECTION 8 OF THE CATALOG ON PAGE
122
CONNECTION DIAGRAM
SELECTION EXAMPLE # 4
1. 3 - PHASE
2. 60 HZ
3. LINE - 208 VOLTS
4. LOAD - 230 VOLTS
5. LOAD - 80 KVA
3-PHASE 120 X 240 – 16/32
CHART
REFER TO 3-PHASE CHART IN SECTION 8
OF THE CATALOG ON PAGE 125
Connection Diagram B-B
TYPICAL APPLICATIONS FOR
BUCK-BOOST TRANSFORMERS
1. AIR CONDITIONERS
2. AC MOTORS
3. PUMPS
4. TANNING BEDS (No. 1 applicat...
GENERAL APPLICATION
COMPARISON
STANDARD ISOLATION TRANSFORMER
• Handle large increases or decreases in voltage
• Provide e...
EFFECTS OF LOW VOLTAGE
ON MOTOR OPERATION
VOLTAGE CURRENT
TEMPERATURE
- 5 % + 5 % + 11 %
- 10 % + 11 % + 23 %
- 15 % + 17 ...
EFFECTS OF LOW VOLTAGE
ON MOTOR OPERATION
• DETERIORATE INSULATION
• NUISANCE TRIPPING OF BREAKERS
• INSUFFICIENT MOTOR TO...
EFFECTS OF LOW VOLTAGE ON
MOTOR TORQUE
% RATED VOLTS % RATED
TORQUE
100% 100%
90% 81%
80% 64%
CAUSES OF VOLTAGE MISMATCH
• SERVICE VOLTAGE CHANGED AFTER
EQUIPMENT INSTALLED
• VOLTAGE DROP IN POWER LINE
• ERRORS IN OR...
GENERAL SIZE COMPARISON
STANDARD ISOLATION TRANSFORMER
• 16”H X 14”W X 11”D 125 LBS
• 1O KVA RATING
BUCK-BOOST TRANSFORMER...
ACME BUCK-BOOST FEATURES
• UL LISTED/CSA CERTIFIED
• UL 3R ENCLOSURES
• ALLOWABLE UNDER NEC
• EPOXY ENCAPSULATED (EXCEPT 5...
BUCK BOOST HANDS-ON LAB
In this exercise we will wire a typical Buck-
Boost transformer for the following
applications:
In...
BUCK BOOST “ISOLATION”
DIAGRAMS
BUCK BOOST “AUTO” DIAGRAMS
QUESTIONS?
Upcoming SlideShare
Loading in …5
×

Transformer Seminar - Buck-Boost

In this presentation you will learn about "Buck Boost" transformers.

  • Login to see the comments

Transformer Seminar - Buck-Boost

  1. 1. Acme Electric Transformer Seminar Buck Boost Transformers
  2. 2. WHAT ARE BUCK-BOOST TRANSFORMERS? BUCK-BOOST TRANSFORMERS START OUT AS ISOLATION TRANSFORMERS WITH OUTPUTS FROM 12 TO 48 VOLTS, WHICH GET FIELD CONNECTED AS “AUTO” TRANSFORMERS TO INCREASE OR DECREASE VOLTAGE WITHIN A RANGE OF 5 TO 20 PERCENT. (ie, 208 T0 230 V) THEY DO NOT PROVIDE ISOLATION FROM THE SUPPLY BECAUSE THEY ARE “AUTO” CONNECTED DURING INSTALLATION!
  3. 3. PRIMARY SECONDARY AUTOISOLATION “ISOLATION” VS. “AUTO”
  4. 4. BASIC PRINCIPLE CURRENT WILL FOLLOW PATH OF LEAST RESISTANCE
  5. 5. PRIMARY & SECONDARY HAVE THE SAME CAPACITY
  6. 6. BOOSTING CONNECTION COIL VOLTAGES ADD
  7. 7. AUTO CONNECTION INCREASES KVA CAPACITY
  8. 8. DATA NEEDED TO SELECT BUCK- BOOST TRANSFORMER 1. SYSTEM PHASE 2. SYSTEM FREQUENCY 3. LINE VOLTAGE 4. LOAD VOLTAGE 5. LOAD KVA, AMPS, OR HORSEPOWER (Available line voltage should be measured whenever possible)
  9. 9. SELECTION EXAMPLE #1 1. 1-PHASE 2. 60 HZ 3. LINE - 189 VOLTS 4. LOAD - 208 VOLTS 5. LOAD - 4 KVA
  10. 10. 1-PHASE 120 X 240 – 12/24 CHART REFER TO 1-PHASE SELECTION CHART IN SECTION 8 OF THE CATALOG ON PAGE 121
  11. 11. CONNECTION DIAGRAM
  12. 12. SELECTION EXAMPLE # 2 1. 1 - PHASE 2. 60 HZ 3. LINE - 208 VOLTS 4. LOAD - 240 VOLTS 5. LOAD - 60 AMPS
  13. 13. 1-PHASE 120 X 240 – 16/32 CHART REFER TO 1-PHASE SELECTION CHART IN SECTION 8 OF THE CATALOG ON PAGE 122
  14. 14. CONNECTION DIAGRAM
  15. 15. SELECTION EXAMPLE # 3 1. 1 - PHASE 2. 60 HZ 3. LINE - 240 VOLTS 4. LOAD - 208 VOLTS 5. LOAD - 14 KVA
  16. 16. 1-PHASE 120 X 240 – 16/32 CHART REFER TO 1-PHASE SELECTION CHART IN SECTION 8 OF THE CATALOG ON PAGE 122
  17. 17. CONNECTION DIAGRAM
  18. 18. SELECTION EXAMPLE # 4 1. 3 - PHASE 2. 60 HZ 3. LINE - 208 VOLTS 4. LOAD - 230 VOLTS 5. LOAD - 80 KVA
  19. 19. 3-PHASE 120 X 240 – 16/32 CHART REFER TO 3-PHASE CHART IN SECTION 8 OF THE CATALOG ON PAGE 125
  20. 20. Connection Diagram B-B
  21. 21. TYPICAL APPLICATIONS FOR BUCK-BOOST TRANSFORMERS 1. AIR CONDITIONERS 2. AC MOTORS 3. PUMPS 4. TANNING BEDS (No. 1 application) 5. CONTROL CIRCUITS
  22. 22. GENERAL APPLICATION COMPARISON STANDARD ISOLATION TRANSFORMER • Handle large increases or decreases in voltage • Provide electrical isolation and shielding if required BUCK-BOOST TRANSFORMERS • Handle small increases or decreases in voltage (+/- 5 to 20%) • Do not provide electrical isolation (because they get “auto” connected)
  23. 23. EFFECTS OF LOW VOLTAGE ON MOTOR OPERATION VOLTAGE CURRENT TEMPERATURE - 5 % + 5 % + 11 % - 10 % + 11 % + 23 % - 15 % + 17 % + 38 %
  24. 24. EFFECTS OF LOW VOLTAGE ON MOTOR OPERATION • DETERIORATE INSULATION • NUISANCE TRIPPING OF BREAKERS • INSUFFICIENT MOTOR TORQUE • WASTED ENERGY AND MONEY
  25. 25. EFFECTS OF LOW VOLTAGE ON MOTOR TORQUE % RATED VOLTS % RATED TORQUE 100% 100% 90% 81% 80% 64%
  26. 26. CAUSES OF VOLTAGE MISMATCH • SERVICE VOLTAGE CHANGED AFTER EQUIPMENT INSTALLED • VOLTAGE DROP IN POWER LINE • ERRORS IN ORDERING EQUIPMENT • UTILITY CUTBACK IN SOURCE VOLTAGE
  27. 27. GENERAL SIZE COMPARISON STANDARD ISOLATION TRANSFORMER • 16”H X 14”W X 11”D 125 LBS • 1O KVA RATING BUCK-BOOST TRANSFORMER • 10”H X 6”W X 5”D 24 LBS • 1 KVA RATING
  28. 28. ACME BUCK-BOOST FEATURES • UL LISTED/CSA CERTIFIED • UL 3R ENCLOSURES • ALLOWABLE UNDER NEC • EPOXY ENCAPSULATED (EXCEPT 50, 100, 150 VA) • BROAD RANGE OF VOLTAGES • TEN YEAR WARRANTY
  29. 29. BUCK BOOST HANDS-ON LAB In this exercise we will wire a typical Buck- Boost transformer for the following applications: Input Output Diagram Connection Type 120V 12V K Isolation 120V 24V L Isolation 240V 12V M Isolation 240V 24V N Isolation 120V 132V C Auto 120V 144V D Auto 120V 100V D Auto (reverse input &
  30. 30. BUCK BOOST “ISOLATION” DIAGRAMS
  31. 31. BUCK BOOST “AUTO” DIAGRAMS
  32. 32. QUESTIONS?

×