SensorLink 8-117 XT 50HZ Manuale utente
SensorLink®
Operators Manual
Amp Litewire
High Voltage Ammeter Probe
Padmount Conductor
Model 8-117XT
Overhead Conductor
Model 8-117WJ
Operators Manual
Amp Litewire
High Voltage Ammeter Probe
Table of Contents Page
Safety Information 4
Theory of Operation 5
Specifications 6
Amp Litewire Operating Instructions 7-10
Fiber Optic Cable Handling Guidlines 11-12
High Voltage Operation 12
Battery Replacement 12
Troubleshooting Guide 13
Amp Litewire Diagram 14
Warranty 15-16
Quality Assurance Back Cover
Available Stock Codes:
8-117 XT 50HZ 8-117 XT 60HZ 8-117 XT EURO
8-117 WJ 50HZ 8-117 WJ 60HZ 8-117 WJ EURO
Page 4
SAFETY INFORMATION
Read all safety and instruction statements before using the product. Failing
to follow the safety guidelines can cause severe injury or death.
The Amp Litewire is designed for use on live, overhead lines. All procedures
appropriate for the line voltage are to be taken, including proper work
techniques, equipment, and Personal Protection Equipment.
The Amp Litewire should be used by personnel who have been trained for
live-line, high voltage work by their organization.
The hot stick should be considered the sole isolation device.
The hot stick lengths must be correct for line voltage per minimum
approach distances stated in published OSHA regulations and/or provided
by the utility.
The cover plate, chuck, probe section, resistor section, and entire Amp
Litewire Transmitter is to be considered at the same potential. Putting the
cover plate, chuck, or other parts of the Radio Voltstik within the air gap
of adjacent phases or ground could cause a phase to phase or phase to
ground fault.
The fiber optic cable is a high voltage insulator and will isolate equipment
in the same manner as a fiberglass hot stick. Wind extra cable and do not
allow extra length to hang loose.
The Amp Litewire should never be left unattended while on the line.
Do not force the arms of the Amp Litewire.
Do not alter the product in any manner.
THEORY OF OPERATION
The Amp Litewire is a two piece, True RMS Ammeter with a fiber optic link between
the high voltage amp sensor transmitter and the analog output at ground potential.
The amp sensor transmitter is mounted on a hot stick (insulated pole) and slipped
over a low or high voltage line. A fiber optic cable connects the amp sensor
transmitter to a receiver unit at ground potential, which provides the analog output.
An analog replica of the current waveform is available at the BNC connector. This
signal may be read with any instrument that is capable of reading 0-2 volt AC. The
unit has an output impedance of 50 ohms.
The fiber optic cable is physically rugged while providing the high speed data path
required for digital waveform transmission. The cable is the high voltage insulator
between the two units and is specified to provide 100kv isolation per foot. It also is
the high voltage insulator between the two units.
The Amp Litewire may be used with the Volt Litewire to maintain power systems
and troubleshoot power problems.
Page 5
Page 6
SPECIFICATIONS
Model Number 8 -117 X T 8 -117 WJ
Sensor Opening Standard Wide Jaw
Opening Width 2.5"
6.35 cm
4"
10.16 cm
Transmitter Weight 1.75 lbs
0.79kg
2.60 lbs
1.18 kg
Range of Operation
Current 1-2000 A 1-2000 A
Phase to Phase Voltage up to 433 kV up to 433 kV
Phase to Ground Voltage up to 250 kV up to 250 kV
Accuracy ±1 %, ±0.1 millivolt
Phase Angle ±1°
Resolution 0.1 millivolt
Frequency
50Hz Calibrated 47 to 53 Hz
60Hz Calibrated 57 to 63 Hz
Analog Output 1 millivolt RMS per Amp
Output Connector BNC. No DC offset voltage.
Output Impedance 50 ohms minimum
Frequency Response 3000 Hz or to the 50th harmonic
Fiber Optic Cable
Standard Length 40 ft, 12.19 m
Isolation 100 kV per Foot, 150 kV max
Mechanical
Ambient Temperature -22° to +140° F, -30° to +60° C
Lithium battery required for use below -4°F (-20° C)
Housing Fire resistant and waterproof polycarbonate and silicone
Hotstick Mounting Universal Chuck Adaptor (hot stick not included)
Battery 9 volt, one per Transmitter and Receiver
Battery Life Minimum six hours of continuous use
Page 7
Amp Litewire Operating Instructions
Step 1: Connect the Fiber Optic link. Inspect and clean the fiber optic cable per
instructions on page 11 and 12. Uncover the male connector dust cover on the fiber
optic cable. Uncover the dust cap on the female receiver, located on the face of the
unit. Line up the male connector and insert into the female receiver. Push and twist
to lock into place. Repeat the process on the opposite end of the fiber for the other
unit.
Step 4: Power on the unit. The Amp Litewire is controlled by the single push
button switch located on the front panel of each unit. Press the push button switch
one time on both the transmitter and the receiver.
Startup Test: The Amp Litewire conducts a startup test to verify the sensors and
circuitry is functioning correctly. While in startup mode the receiver screen will
display TESTING.
When the test determines the unit is functioning properly, the transmitter push
button LED will be solid green, and the receiver display will be in Measurement
Range selection.
If the test detects a failure the display will show FAIL and a corresponding code. See
page 13 for the failure code chart.
Step 2: Attach unit to the hot stick. Attach the sensor transmitter to a universal
hot stick (Insulated Pole).
Step 3: Attach the Strain Relief Strap. To prevent strain on the fiber optic cable,
wrap the Velcro securely around the handle of the transmitter as shown below:
Page 8
Step 5: Select Measurement Range.
Unit will automatically be set to “2000”. To change, press and hold the button. The
LCD will continuously toggle through “20”, “200”, “2000”, and “OFF” messages
until one is selected by releasing the button.
“20” means 0 to 20A measurement range. In this range, 100mV RMS analog output
represents 1A RMS input.
“200” means 0 to 200A measurement range. In this range, 10mV RMS analog output
represents 1A RMS input.
“2000” means 0 to 2000A measurement range. In this range, 1mV RMS analog output
represents 1A RMS input.
Once the range is selected, and the fiber optic cable is connected, the receiver
display will show “<1” to indicate there is no current applied through the sensor
transmitter.
Step 6: Connect to the analyzer. An analog replica of the current waveform is
available at the BNC connector. This signal may be read with any instrument that is
capable of reading 0-2 volt AC. The unit has an output impedance of 50 ohms. A
portable oscilloscope, waveform recorder, or power analyzer may be used. You will
need the following equipment to output an analog device:
(1) Amp Litewire: 8-117 XT or 8-117 WJ
(2) 7-011-CABL
See the operation manual of the analyzer on how to connect the Amp Litewire to
get the analog replica of the current waveform.
20 200
2000 OFF
Page 9
Step 7: Assembling the hanger (if applicable).
A retaining ring keeps the thumb screw bound to the hanger.
The hanger attaches to a mount on the back of the Amp Litewire, centered just
above the battery door. Insert the thumb screw into the recessed thread. The pin on
the back of the hook aligns with a receptacle adjacent to the threaded insert.
Step 8: Hanging the Transmitter. A detachable hook, ordered separately, is
available to allow the amp sensor transmitter and its hot stick to hang temporarily
from overhead wires.
**The unit should never be left unattended while hanging.
**The receiver unit should never be allowed to hang free.
Page 10
Step 9: Communication. Once hung, the transmitter unit will read and
communicate to the receiver. The display on the receiver will update to “>1” when
there is more than 1A of current applied.
Step 10: Powering the unit OFF. Press and release the switch button to turn off
both the transmitter and receiver.
Step 11: Auto Power OFF. The receiver units and transmitter will power off if it
does not receive more than 1A input for approximately 30 minutes. This feature is
designed to save battery power. If an automatic time-out occurs, the units will have
to be manually restarted.
>1
Directional Properties
The Amp sensor on the Litewire is direction sensitive. In order to ensure proper
phase relationship when comparing to a voltage reference, place the Amp Litewire
so the face of the instrument is facing the load. The proper phase angle should be
0 to ±90º when measuring the fundamental. When the sensor is positioned in an
improper orientation the phase angle will read ±91º to ±180º.
Questo manuale è adatto per i seguenti modelli
5
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