®
DOUBLE VISION
DUAL DISPLAY
PHASING VOLTMETER
a n d AC C E S S O R I E S
Operating & Instruction Manual
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®
DOUBLE VISION
DUAL DISPLAY
PHASING VOLTMETER
a n d AC C E S S O R I E S
Operating & Instruction Manual
IMPORTANT SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
TECHNICAL SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Pre-Use Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Voltage Measurements: Line-to-Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Voltage and Phasing Measurements: Line-to-Line . . . . . . . . . . . . . . . . . . 8-9
Test Point Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Peak Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PROBES AND ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Proof Tester® Voltmeter Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CARE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
REPAIRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
CALIBRATION AND MAINTENANCE LOG . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14
TERMS AND CONDITIONS OF SALE
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IMPORTANT SAFETY INFORMATION
07/18
USE
HOT
STICK
Pr ess ON s wit ch.
Press ON again to select
Test Point TP, Peak Hold H.
Dots in lower right corner of
display indicate active wireless
communication. See instruction
manual.
NOTI CE: Us e corr ect ove rhead
and underground probes. U se only
w
ith high voltage insulating hot sticks
with length app ropriate for voltage. For
use by trained high voltage professionals
only.
CAUT ION: The h ousing is no t an i nsula tor
and must not b ridge energized conductors or
an energize d conductor to gro und. Do not use
on voltages higher than 43kV line-to-line. Test on
known voltage sourc e before an d after eac h use.
Inspe ct co nnect ing c ord a nd re turn m eter to
HD Electric Company for repair if cord or other meter
components are worn or damaged. Keep cord free and
clear of all conductors during application.
WARNING: All OSHA and company work practices must be
followed. A lways wear approve d insulated gloves, eye and
face protection and FR clothing. Do not touch meter housing
during measurement. Read and understand instructions. Failure
to follow these instructions or other misuse or misapplication can
lead to severe injury and death.
Part No. DDPM-40 Serial No.
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Read and understand these instructions prior to use. These operating instructions
are not a substitute for proper training in the use of this equipment. High voltage
systems present serious hazards, including the risk of death or serious injury due to
arcing, thermal burns and electrocution. HD Electric’s products are intended solely
for use by professionals with knowledge, training and experience in the use of
the equipment and its accessories in and around high voltage systems.
All applicable federal, state, company and OSHA work practices
must be followed. If you are unfamiliar with the work practices
required, DO NOT PROCEED. Call HD Electric if you
have any questions regarding this equipment.
These important labels are affixed to
THE PRODUCT. Read and understand
each of them before proceeding.
All meters require the use of accessory
hot sticks, which may or may not be
supplied with the meter. The minimum
hot stick length required for safe use depends
upon the particular operation; consult federal,
state, company and OSHA specifications for the
proper hot stick length for the intended operation.
The users of this meter should always be equipped with personal protective equipment
including high voltage gloves, flame retardant clothing, eye and face protection. Some
applications may require additional protective equipment.
Accessory probes are available for all meters. Always use the proper probe(s) for your
application.
Failure to follow these and other warnings and safety precautions may result in severe
injury or death.
OPERATIONAL IMPAIRMENT
If the DDPM-40 is used in a manner not described in this instruction manual,
the protection and effective operation of this equipment may be impaired.
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GENERAL DESCRIPTION
The HD Electric Dual Display Phasing Voltmeter includes a pair of single stick
line-to-ground voltmeters that communicate with each other wirelessly. Both units
are constructed with high strength molded housings with epoxy encapsulated high
voltage resistors, a ground cord and a digital LED display.
The high voltage resistors limit
the current through the ground
cord to a maximum of less than
one milliamp. Although the ground
cords are insulated for voltage up
to 20kV, they should always be
kept free and clear from you and
any other conductors.
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Hot Stick Connection:
Shotgun or Universal Spline
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TECHNICAL SPECIFICATIONS
MODEL NUMBER: DDPM-40
ENVIRONMENTAL CONDITIONS
• Conditions - Indoor and outdoor use
• Altitude - Up to 6,566 ft. (2000M)
• Operating Temperature -20°F to +120°F (-29°C to +49°C)
• Humidity - 95% to 49°C (non-condensing)
• Pollution Degree - PD4
• Measurement Category IV – Classification Rating (CAT IV) – Product is intended
for use with test and measuring circuits connected to the circuits/wiring outside
of a building installation, including transmission lines.
• Overvoltage Category IV
• Enclosure Material - Supertough Nylon UL 94-HB
• Printed Circuit Boards - FR-4 UL94V-0
• IEC Protection Rating - IP64
DIMENSIONS:
• Length 14 in. (36cm), Width 4.6 in. (12cm), Height 4.1 in. (10cm)
• Ground Cord Length - 12’ (3.6m) fully extended, 3.5’ (1.7m) retracted
• Weight - (w/o probes): 2.25 lbs. (1.02kg) each unit
• Battery Life - 8 hours continuous use under normal operating conditions
• Battery - 9V alkaline 1604A, IEC 6LR61 or 9V lithium, ANSI-1604LC
• Digital Meter - Reads in kilovolts
• Voltage Range - 5V-25kV each unit line-to-ground.
Indicates up to 43kV line-to -line, AC 25-1000Hz or DC
• Phasing Frequency - 50/60Hz
• Auto-Ranging - No range selector switch
• Accuracy - Within 1% of reading +/- 3 counts
• Meter Resolution: 0.005 - 0.999 range with 1 Volt resolution
1.00 - 9.99 range with 10 Volt resolution
10.0 - 25.0 range with 100 Volt resolution
(line-to-ground & line-to-line measurements)
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OPERATING INSTRUCTIONS
The DDPM-40 Dual Display Phasing
Voltmeter measures DC and AC RMS voltage
from 5V to 25kV line-to-ground at 25-1000Hz
and up to 43kV line-to-line at 50/60Hz.
Press the ON button on both units to turn
them on. The initial zero kV indication will
be replaced shortly with the display of
hollow zeros as a battery saving measure.
A low battery indication in the lower
right corner of the screen indicates
that the battery will need to be replaced
soon. If the battery dies completely,
the display will shut off. The battery
compartments are on the
bottom of each unit. HD Electric
recommends using 9V lithium
batteries but alkaline batteries
may also be used.
Both displays will turn off after
two minutes of a zero display.
BATTERY REPLACEMENT
INSTRUCTIONS
To replace the battery, open
and remove the compartment
on the bottom of the meter
housing. Remove and dispose
of the old battery, replacing it
with a fresh, new 9-volt lithium
or alkaline battery.
Note battery polarity on the
battery compartment. This
compartment cannot be reinserted
if the battery polarity is reversed.
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OPERATING INSTRUCTIONS continued
Pre-Use Inspection
WARNING: Before using the instrument be sure to test and inspect the equipment
to ensure that it is functioning properly and is in safe, working condition. Failure to do
so may cause serious injury or death and may result in erroneous test measurements.
Before making any high voltage measurements, test and inspect the voltmeter/phaser as
follows:
1) Make certain the instrument is clean and dry.
2) Inspect the cord for cracked insulation.
3) Be sure that you are using hot sticks of the appropriate length, and examine each
hot stick to ensure that it is clean, dry and waxed to a clear shiny surface.
4) Attach the appropriate probes for overhead or underground applications (see page 11)
and ensure that the probes are properly installed and tightened (do not overtighten).
5) Confirm that the meter is configured for the correct application (normal reading,
Peak Hold, Test Point).
6) Test each voltmeter with a voltmeter tester such as the HD Electric
PT-5000B Proof Tester
®
Voltmeter Tester (see page 11).
Voltage Measurements – Line-to-Ground
First connect the ground cord to either a ground or system neutral. Maintain contact with
the meter probe tip only long enough to read the meter. Always remove the probe from the
energized source first before removing the ground connection.
Voltage and Phasing Measurements – Line-to-Line
We recommend that two person crews perform all line-to-line voltage measurements
and phasing operations. Since the operation is occurring near two energized conductors,
the use of two person crews allows each person to operate one meter stick and maintain
high safety standards.
In order to make line-to-line measurements, each meter must contact an energized
line. Be sure that only those probes intended for the particular application are used
(see page 11). Always keep the ground cord free and clear of energized phases
and conductors. For phasing applications, the meters will be placed on opposite sides
of an open point, typically a switch. The phasing operation will indicate if two sides
of a line are in-phase before closing a switch. If the two phases are out-of-phase, the
meter will indicate which is leading and which is lagging.
To check all phases proceed as follows:
1) Measure voltage on each phase from line-to-ground to verify all phases are live and
at the same voltage.
2) Place one of the probes on a conductor on one side of the switch.
3) Place the other probe on one of the three phases on the other side of the switch.
4) If the conductors are out-of-phase, the meter will read line-to-line voltage.
If they are in-phase, the meter will read near zero but may read up to 15% of the
line-to-line voltage.
5) Continue this procedure with all three phases on both sides of the switch.
If an intermediate reading is found, the phasing cannot be determined by this method and
the switch should not be closed until other means are used for phasing.
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OPERATING INSTRUCTIONS continued
When the meters are first applied
to voltage, they both measure lineto-ground voltage. This is indicated
in the displays by L-G.
Once one meter is applied to line-toground voltage, it begins to wirelessly
search for a second meter. Any
DDPM-40 may connect with any
other DDPM-40 applied to voltage
in the area. When two meters have
established wireless communication,
moving dots will appear in the bottom
right corner of each display.
After a few seconds, both meters will
show line-to-line voltage, indicated in
the displays by L-L.
If they are out of phase, one meter
will show REF indicating it is the
reference phase and the other
meter will show the phase angle.
Here, the +120° indicates it is leading
the reference phase by 120°.
And here the -120° shows this meter
lagging the reference phase by 120°.
If the two meters are in phase, the
line-to-line voltage will be near zero
and one meter will again show REF
while the other phase indication will
show IN.
As soon as one meter is removed from
voltage, the wireless link is shut down
until the next time voltage is applied.
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OPERATING INSTRUCTIONS continued
Test Point Measurements
To activate Test Point mode simply push the ON
button again. Test Point mode is indicated by TP
in the display. To turn Test Point mode off, simply
press the ON button again to continue cycling
through functional modes. When using a DDPM-40
to phase between test points, the important measurement is whether high voltage
is present or not. The proper procedure for phasing between elbow test points is
as follows:
1) Both elbows must be energized. Follow the proper safety practices for removing the
test point protective caps and exposing the live test points. Treat all exposed electrodes
as energized high voltage. Measure from both elbow test points to ground. These
measurements should show that both elbows are energized and, if both elbows are of
the same type and manufacture, should measure the same approximate line voltage.
2) Measure from one elbow test point to the other. This reading will show either a
high voltage reading indicating the elbows are out-of-phase or a zero or low voltage
reading indicating the elbows are connected to the same phase. The in-phase voltage
measurement can be between zero and 15% of the nominal line-to-ground voltage.
If both elbows are of different type and manufacture, then the reading may be higher.
Peak Hold
Press the ON button to activate this
feature and once again to clear the
reading. The H in the display confirms
Peak Hold. The display will hold the
highest reading while Peak Hold is
activated.
off while a peak reading is displayed.
NOTE: The meter will not shut
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PROBES AND ACCESSORIES
WARNING: ALWAYS use probes appropriate to your application.
NEVER use overhead probes in underground applications.
Failure to use the correct probe can result in arcing or electrical
contact and may cause serious injury or death. If you are not
trained in the particular operation or are not sure about the
appropriate probe for your application do not proceed.
Overhead Probes
A. 025-OLPS-5 brass hook probe
B. 025-OLPS-6 brass pigtail probe
C. Hot Stick
A range of hot sticks are available in lengths
starting at 4’. Contact HD Electric for more details.
D. Insulated Underground Probe
GCP-1 for general underground use
on grounded terminals, exposed high
voltage terminals or elbow test points.
Underground Dead Front Bushing Probes
E. ASP-15/25 for use in 15kV and
25kV loadbreak bushings
F. ASP-35U for use in 35kV loadbreak bushings
G. Underground Elbow Probe
EA-15/25 for insertion in loadbreak elbows.
NOTE: The elbow must be firmly supported
when using this probe.
A
C
DE F G
B
Proof-Tester®Voltmeter Tester
The PT-5000B Proof Tester Voltmeter Tester will produce 5kVDC
at the test leads to confirm proper operation of voltmeters and
phasers. This tester should be used only with voltmeters/phasers
that measure DC voltage. It will not confirm operation of
voltmeters/phasers that measure AC voltage only. The PT-5000B
operates from one 9V lithium or alkaline battery and produces
approximately 5kVDC at the connecting leads. To use:
1) Connect one tester lead to the meter ground cord and the
other lead to the probe tip, typically the overhead brass hook probe.
2) Press and hold both TEST buttons.
3) Confirm a good battery by checking the red light on the Tester. If the red
light does not come on, replace the battery with a 9V lithium or alkaline only.
4) Verify the voltmeter/phaser reads approximately 5kV.
5) Release the TEST buttons and disconnect the Tester from the voltmeter/phaser.
Perform this test on both units.
WARNING: Do not use the voltmeter/phaser if proper operation is not confirmed.
WARNING: Do not use this tester except as directed. Do not use to test equipment
other than voltmeters/phasers. Do not apply to energized circuits or equipment. Refer
all servicing to the factory. Failure to follow these instructions may lead to electric shock,
severe injury or death.
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CALIBRATION AND MAINTENANCE LOG
DATE CALIBRATED BY
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CALIBRATION AND MAINTENANCE LOG
DATE CALIBRATED BY
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