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Inst ruments and Meters – 2450
Phone: 573-682-5521 Email: hpsliterature@hubbell.com Web: hubbellpowersystems.com
Page 2465
November 2012
*For testing URD elbows with test points, only model
C4030979 on this page includes straight probe and “TP”
setting on selector switch (as well as hook probe for
overhead uses).
For other URD models and Accessories, see next page.
Ordering Information
Distribution and Transmission
Multi-Range Voltage Detectors
Catalog No.
C4030979*
C4031029 
C4031140 
Scales
1 - 40 kV
16 - 161 kV
69 - 600 kV
Weight
5
1
2
lb./2.5 kg.
5
1
2
lb./2.5 kg.
5
1
2
lb./2.5 kg.
Multi-Range Voltage Detectors
for Overhead Systems to 600 kV and URD Elbow Test Points*
Overhead Voltage-Presence
Test can be performed by all
models.
Switch on C4030979* includes Test Point.
Self-test
Button
C4031029 or C4031140
C4030979*
URD Voltage-Presence
Test on Elbows with
Test Points can be
performed only by
Model C4030979* set
at TP and fitted with
its Straight Probe.
Design Features
• Confirms a line is de-energized prior to performing
maintenance
• A field intensity meter, it is calibrated to read
approximate line-to-line voltage when connected to any
phase conductor
• Responds to magnitude of field gradient between its end
probe and floating electrode (at the universal hotstick-
attachment fitting)
• If the universal fitting is close to a ground, another phase
or another voltage source, reading should be high
• If it’s close to a jumper or equipment of the same phase,
the reading should be low
• Gives metered readout capable of distinguishing actual
line voltage from static or feedover from an adjacent line
• Numerical readings can be compared with numerical
rather than subjective judgments associated with “fuzz
sticking” or “glow-detecting”
• Since it is not a voltmeter, no specific accuracy is claimed
by the manufacturer or can be assumed by the user
Operation
• Must be mounted on proper length hotstick for the
voltage class involved
• Complete instructions are furnished with easy, illustrated
step-by-step procedures
• Internal circuit and pushbutton permit check before
and after each use to confirm operational condition of
instrument and battery