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Inst ruments and Meters – 2450
Page 2478
November 2012
Phone: 573-682-5521 Email: hpsliterature@hubbell.com Web: hubbellpowersystems.com
Truck Boom Leakage-Current Monitor
Ladder Monitor Kit
Features & Applications
• Used with EHV Barehand maintenance to detect
microamp leakage on a ladder
• Meter is connected to ladder and takes readings when
ladder is in contact with conductor
• Recommended that readings be taken periodically to
ensure optimal working conditions which could be
altered by change in atmosphere
• Kit includes:
o 200 micro-amp scale microammeter
o Three clamps to effect use on a three-rail ladder
o Cable with clips and adapter to establish contact
o Bracket to ground and hold meter on structure
o Two dry cell batteries
o Instruction drawings for field assembly
o Operating instructions
Description
Ladder Monitor Kit
Weight
7.5 lb./3.4 kg.
Catalog No.
C4020288
Chance Sentinel
Leakage-Current Monitor
• Alerts utility-line workers of overcurrent conditions
• For such aerial devices as insulated ladders and truck
booms
• Sounds an alarm if leakage current reaches a pre-set
level
• Leakage setting adjusts from 1 to 1,000 microamperes
in resolution increments of 0.1 microamp
• Audible warning eliminates need to watch the actual
current level, continuously displayed on digital LCD
screen
• Alarm sounds immediately upon overcurrent and
continues until the condition is corrected
• Instrument panel jack accepts a standard 1⁄4" two-
conductor phone plug to also trigger a truck horn or
other external alarm
• Panel test terminal permits a simple continuity check of
the monitor leads prior to each operation
Mounting studs on steel box
bond directly to truck body.
• Mounts on truck body and hardwires into truck’s 12-
Volt system, which eliminates battery changeout
• Sounds an alarm if leakage current reaches a pre-set
level
• Alerts utility-line workers of overcurrent conditions on
truck booms
• Leakage setting adjusts from 1 to 1,000 microamperes
in resolution increments of 0.1 microamp
• Audible warning eliminates need to watch the actual
current level, continuously displayed on digital LCD
screen
• Alarm sounds immediately upon overcurrent and
continues until the condition is corrected
• Instrument panel jack accepts a standard 1⁄4" two-
conductor phone plug to also trigger a truck horn or
other external alarm
• Panel test terminal permits a simple continuity check of
Catalog No.
C4070025
Description
Chance Sentinel Kit
Weight
9 lb./4.05 kg.
Catalog No.
T4070327
Description
Boom Monitor Kit (12 Volt)
Weight
14 lb./6.4 kg.
the monitor leads prior to each operation
• Before use, instrument automatically performs a rapid
electronic self-test
• Simple operating steps are printed on the inside lid
panel
• Detailed instruction sheet included
for EHV Microamp Measurement on Barehand Equipment
• Before use,
instrument
automatically
performs a
rapid electronic
self-test
• Simple operating
steps are printed
on inside lid panel
• Detailed instruction sheet included
• Kit includes one coaxial cable and battery, two jumpers
and three hose clamps for connections to two- or
three-rail ladders
• Brackets on box secure to an earth-grounded structure
up to 5⁄8" thick such as a transmission tower