B-00125 USBS (1
st
Gen) Operation Manual
4
BREAK-SAFE
®
CIRCUIT RESTRICTIONS
BREAK-SAFE
®
devices should not be used in situations where the maximum voltage
and/or amperage rating of the tool can be exceeded. BREAK-SAFE
®
tools are rated
by maximum amperage (A) and voltage (V). TABLE 1 details the specific ratings of
the various BREAK-SAFE
®
models.
Cat. #
Maximum
Current
Rating
Maximum
System
Voltage
Minimum
Conductor Size
Maximum
Conductor Size
USBS-15-1-PS 300 A
15 kV
#6 Copper
954 ACSR
USBS-15-2-PS 300 A
15 kV
#6 Copper
954 ACSR
USBS-27-1-PS 300 A
27 kV
#6 Copper
954 ACSR
USBS-27-2-PS 300 A
27 kV
#6 Copper
954 ACSR
USBS-46-1-PS 200 A
46 kV
#6 Copper
954 ACSR
USBS-46-2-PS 200 A
46 kV
#6 Copper
954 ACSR
TABLE 1: Model Ratings
Outlined below are some circuit restrictions known to exist:
•
Do not utilize the BREAK-SAFE
®
tool in situations where ferroresonance can
produce overvoltage situations. An example of this involves switching
unloaded transformers that are delta-connected three phase and wye-
connected three phase with primary neutral ungrounded.
•
Do not utilize the BREAK-SAFE
®
to switch unloaded transformers.
•
Do not utilize the BREAK-SAFE
®
to switch capacitor banks. Capacitor
switching can cause large over voltage situations that are likely to cause
flashover of the tool.
