Instructions / Assembly

28
Safety, Health & Environment
3-Phase/Motor Rotation
Tester
Description Cat. No.
3-Phase/Motor Rotation Tester 61-521
• Identifies three-phase sequence
• Indicates motor rotation
• Checks for open phases
• For use up to 600V
• 2-year warranty
Includes carrying
case
600V
1000V
300V
N12966
The power demands of today’s high-tech world have
caused a marked increase in occurrences and levels of
transient overvoltages. The International Electrotechnical
Commission (IEC) has developed a safety standards model
for measurement, control and laboratory use.
Category I – The signal level for telecommunications,
electronic and other low-energy equipment with
transient-limiting protection. Peak impulse transient
range is 600–4,000 volts with a 30 ohm source.
Category II – The local level for fixed and non-fixed
powered devices including appliances, lighting and
portable equipment. Outlets located more than 30 feet
from CAT III sources and 60 feet from CAT IV sources.
Peak impulse transient range is from 600–6,000 volts
with a 12 ohm source.
Category III – The distribution level for fixed primary
feeders or branch circuits. Circuits that are separated
from CAT IV sources by at least one level of transformer
isolation. Peak impulse transient range is 600–8,000 volts
with a 2 ohm source.
Category IV – The primary supply level for the highest
levels of transient overvoltage. Includes the utility service
both outside and at the service entrance, service drop
from the pole to the building, overhead line to remote
buildings, and underground line to a well pump. Peak
impulse transient range is 600–12,000 volts with less than
a 1 ohm source.
CAT I
Copiers
• Electronic
equipment
• Low energy
equipment with
transient limiting
protection
CAT II
Appliances,
PCs, TVs
• Outlets and long
branch equipment
• All outlets at more
than 10m (30 ft)
from Category III
source
• All outlets at more
than 20m (60 ft)
from Category IV
source
CAT III
MC Panels
• Feeders and short
branch circuits
• Distribution
panel devices
• Heavy appliance
outlets with “short”
connections to
service entrance
CAT IV
Exterior
Transformers,
Meters
• Outside and
service entrance
• Service drop from
pole to building
• Overhead line to
detached building
• Underground line
to well pump
Service
Entrance
Service
Entrance
Meter
Meter
Meter
Transformer
Outbuilding
Underground Service
Service
Entrance
Outbuilding
Underground Service
Safety in the Field
3-Phase Sequence Tester
Description Cat. No.
3-Phase Sequence Tester (carrying case included) 61-521
• For use up to 600V
• Color-coded insulators over
alligator clips
• Shock resistant housing
• Easy to read
• 2-year warranty