Transcript Temporary Power Basics

© 2011 Ericson Manufacturing, Willoughby, Ohio 44094
ERICSON MANUFACTURING TRAINING MODULES
TEMP POWER BASICS
PART 1 of 2
Modules A, B & C
© 2011 Ericson Manufacturing, Willoughby, Ohio 44094
MODULE A
BASIC INFORMATION
ABOUT
TEMP POWER
MODULE B
Selecting the
RIGHT
TEMP POWER
MODULE C
The 5 Easy Steps to
selecting
TEMP POWER PRODUCTS
Temp Power
Temporary Power Products are any devices used to control electrical energy for short term durations and are
not part of a building’s PERMANENT Electrical system.
These devices can include: Electrical Extension Cords, Electrical “Panels”, Electrical Voltage Transformers and a
variety of connection electrical devices.
Temp Power
Temporary Power Product
Input
-Primary
-Line
Power block
• Transforms
• Distributes
• or Both
Output
-Secondary
-Load
Temp Power
voltage
“the size of the power”
600, 480, 277
240, 208, 120 volts
Temp Power
voltage
“the size of the power”
600, 480, 277
240, 208, 120 volts
amperage
“the force of the power”
15 to 400 amps
Temp Power
voltage
“the size of the power”
600, 480, 277
240, 208, 120 volts
amperage
“the force of the power”
15 to 400 amps
phase
“the pipelines of the power” 1 phase 3 phase
Temp Power
AC vs DC Voltage
AC or Alternating Current is
generator created.
voltage
“the size of the power”
DC or Direct Current is created by
Battery or AC/DC power supply.
Tools, motors, pumps, light bulbs, switches,
fuses, circuit breakers are all rated or DESIGNED
to operate at a given voltage or range of voltages
Household
Automobile
Jobsite
Mostly 120VAC
12 VDC
600 or 480 VAC
Some 240VAC
208 or 240 VAC
Temp Power
amperage
“the force of the power”
Symbol = A
Motors to light bulbs require or PULL a certain
amount of amps through the cord.
Amps are added on a circuit and called the
“load”.
Household
Jobsite
100 Watt Light bulb – 1.5 amps
Drill or grinder – 5 to 18 amps
Electric Range – 50 amps
Stringlight – 10 to 18 amps
Temp Power
phase
“the pipelines of the power”
Symbol = ø
The basic count of hot lines in a single circuit.
1 Phase 120V = 1 Hot , 1 neutral & 1 safety ground
1 Phase 240V = 2 Hots, 1 neutral & 1 safety ground
3 Phase 208V = 3 Hots, 1 neutral & 1 safety ground
3 Phase 480V = 3 hots & 1 Neutral/Ground Bonded
Temp Power
Electric circuits require a hot and return (neutral)
side to complete the circuit or loop.
Source
Neutral Return
Hot +
-
Temp Power
Rule: Electric wires (conductors) are sized or
rated to carry a maximum amperage or current.
Amp chart is NEC 400 – wire sizing
#14 awg = 15 amps
#12 awg = 20 amps
#10 awg = 30 amps
# 6 awg = 50 amps
Note: Wire “size” goes
down as physical wire
gets larger and can carry
more amps
Temp Power
Rule: Too much current ( amps ) can burn up circuits –
fire hazard.
Protection – Circuit Breakers & GFCI
Voltage
Source
Wire size too small
Temp Power
Rule: Too much current ( amps ) can burn up circuits –
fire hazard.
Protection – Circuit Breakers & GFCI
Voltage
Source
Circuit Breaker or Fuse
PROTECTS the equipment or wiring
Temp Power
Rule: Too much current ( amps ) can burn up circuits –
fire hazard.
Protection – Circuit Breakers & GFCI
Voltage
Source
Circuit Breaker or Fuse
PROTECTS the equipment or wiring
CODE RULE:
Circuit Breakers or Fuses must be
rated for the smallest rated
part of the circuit.
Temp Power
Protection
Circuit Breakers protect equipment and wiring.
- NOT a life safety device!
- Rated in full amps ( 15, 20, 30, 50 etc)
- Must be on all branch circuits
- Must be rated correctly
- Does not do the same job as a GFCI
Temp Power
Protection
GFCIs protect people.
- Ground Fault Circuit Interrupter
- Quick life saving device
- Sensitive to poor connections, cheap cordage, moisture
Temp Power
Protection
Circuit Breakers protect equipment and wiring.
- Not a life safety device
- Rated in full amps ( 15, 20, 30, 50 etc)
GFCIs protect people.
- 6 ma trip point ( 6 millionth of an amp)
- Quick life saving device
- Sensitive to poor connections, cheap cordage, moisture
Temp Power
Rule: Electrical current will find any path to ground –
Including through you!
Protection - Circuit Breaker ONLY
Electric current flows to and
from tool as normal…
Voltage
Source
H
Circuit
Breaker
N
Ground
Temp Power
Rule: Electrical current will find any path to ground –
Including through you!
Protection - Circuit Breaker ONLY
Voltage
Source
H
Circuit
Breaker
N
Ground
PROBLEM !
TOOL DEVELOPS AN
ELECTRIC FAULT and
SENDS ENERGY THROUGH
THE WORKER TO GROUND !
Temp Power
Rule: Electrical current will find any path to ground –
Including through you!
Protection - add a GFCI
GFCIs watch for a mis-match in
current on the Hot and Neutral
conductors.
Voltage
Source
H
Circuit
Breaker
GFCI
N
Ground
CODE RULE:
GFCIs are required for all 15, 20
and 30 amps 120V rated
circuits on jobsites.
Temp Power
Transform vs Distribution
Distribution – “Splitting Phases”
Temp Power
Transform vs Distribution
Distribution – “Splitting Phases”
 120 volts ( 1 phase ) – 1 set of 120 V source
1 Hot, 1 Neutral & 1 Safety earth ground
Temp Power
Transform vs Distribution
Distribution – “Splitting Phases”
 120 volts ( 1 phase ) – 1 set of 120 V source
1 Hot, 1 Neutral & 1 Safety earth ground
 240 volts ( 1 phase ) – 2 sets of 120 V sources
2 Hots, 1 shared Neutral & 1 Ground
Temp Power
Transform vs Distribution
Distribution – “Splitting Phases”
 120 volts ( 1 phase ) – 1 set of 120 V source
1 Hot, 1 Neutral & 1 Safety earth ground
 240 volts ( 1 phase ) – 2 sets of 120 V sources
2 Hots, 1 shared Neutral & 1 Ground
208 volts ( 3 phase ) – 3 sets of 120 V sources
3 Hots, 1 shared Neutral & 1 Ground
Temp Power
Transform vs Distribution
Transforming Power
480 or 600 volts is available at site.
Tools can’t run on “commercial power” levels.
The voltage requires transforming to reach 240, 208 or
120 volt ranges.
Temp Power
Power block
Input
• 1510-P
• 120V
• 15 amps
• 1 phase
Distribute only
Output
• 1610-C
• 120V
• 15 amps
• 1 Phase
Temp Power
Power block
Cordset
Input
• 1510-P
• 120V
• 15 amps
• 1 phase
Distribute only
Output
• 1610-C
• 120V
• 15 amps
• 1 Phase
Temp Power
Oscar
Power block
Input
• 240 Volts
• 1 Phase
• 50 Amps
•Distributes
Output
• 120 Volts
• 1 phase
• 6 circuits @ 20
amps each
Temp Power
Oscar
®
Power block
Input
• 240V
• 1 Phase
• 50Amps
•Distributes
Output
•120V
•1 phase
•6 circuits @ 20 amps
each
Temp Power
Power block
Input
• 208V
• 3 Phase
• 200 Amps
•Distributes
Output
• 120V
• 1 phase
• 18 circuits @ 20
amps each
Temp Power
Power block
Input
• 208V
• 3 Phase
• 200 Amps
•Distributes
Output
• 120V
• 1 phase
• 18 circuits @ 20
amps each
Temp Power
Jobsite Problem:
How do you run a tool rated at 120 Volts if only
480 Volts are available?
Answer: Transform the power to 120V.
Transformers either step up or step down voltage
based on the design.
Temp Power
Transform
section
Input
• 480V
• 3 Phase
• 60 Amps
Distribution
section
Output
•120/208V
•3 phase
•(18) 1 phase
circuits @ 20
amps each
Temp Power
Basic Rule:
3 Phase input into a transformer derives 3 phase
output. 1 Phase input derives 1 phase output.
480V 3 phase INPUT = 120/208V 3 phase OUTPUT
480V 1 phase INPUT = 240V 1 Phase OUTPUT
Temp Power
Size Matters:
Transformers are rated in KVA – this is the size
rating as to the amount of amps they can
produce.
Every 15 KVA = Max of (6) 20 amp 120 V circuits
Temp Power
How to determine the right Temp Power Product
Step 1 – Determine the NEED
( Distribute or Transform)
Step 2 – Determine the AVAILABLE POWER
- Volts Amps Phase
Step 3 – Determine the
EXPECTED ELECTRICAL OUTPUT
Temp Power
How to determine - con’t
Step 4 – Determine the CONNECTIONS
How will they connect in and out
Be specific
Use NEMA values
Volts amps phase
Step 5 – Determine the BUDGET
Distribute Point to Point Only
Cordsets
Distribute / Split Phases / GFCI Protection
Oscars Gen Cords
Big-E Jr
Big-E
Distribute Multiple Taps
Distribute / High Power ( 480 or 600 V )
“Y” “W”
480V Big-E
600V Big-E
Power Stringers
6000 7000 8000 Series
Transform / Distribute / GFCI Protect
Distribute with GFCI Protection
GFCI
1060
e-Cart Jr.
e-Cart
END OF SESSION