Products

TVM Series

Live Line Tool (Hot Stick) Testers

PPE
  • Innovative electrodes automatically wrap stick during loading
  • Guarded current metering allows AC testing by leakage current
  • Up to 100,000V AC or 100,000V DC per foot
  • Allows testing to IEEE 978 and OSHA regulations
  • Guarded current metering potentially cuts test time from 5 minutes to 1

The TVM Series is The VON Corporation’s fully automated live line tools (hot stick) test solution. Units allow testing of all standard live tools to meet IEEE 978 and current OSHA regulations. Tests are timed and an audible alarm sounds failures or test complete, with bright fl ashing colored lights signaling which position failed or test complete.

CapacityThe TVM machine will automatically and simultaneously test six 14 foot sticks at voltages to 100,000 volts A.C. or 100kV DC, depending on purchased options (80kV AC and/or 100kV DC Standard).
VoltageThe standard input voltage is 240 volts, 50/60 hertz A.C. single phase. Other input voltages can be accommodated if specified in advance. The TVM series has 0-80,000 volts AC test voltage provided by a
continuous duty transformer. The TVM-DC series has a 0-100,000 V DC supply. The test voltage is measured by means of a resistive divider connected directly across the high voltage circuit. An LCD displays
the output voltage both digitally and with a bar graph. The test voltage
is raised and lowered with a special solid state device at a rate of approximately 3 kilovolts per second.
CurrentHigh Voltage and Return Current positions are alternated every 1 foot. The current of each section being tested is continuously monitored
by the microprocessor control system. The TVM series has 0-80,000 volts AC test voltage provided by a continuous duty transformer. The TVM-DC series has a 0-100,000 V DC supply. This allows testing to
meet IEEE 978 in a minimum one minute test, without resorting to the 5-minute heating test. Additionally, there is a circuit to check for a short-circuited electrode.
VentilationThree exhaust fans are provided in the top rear of the blanket testing cabinet to remove ozone.
EnclosureThe enclosure can be moved with a forklift or lifted with a crane via the eyebolts located at the top of the enclosure.
ControlsA menu-based system provides all controls from the front control panel. All standard tests come predefined for the user. These predefined tests set all the machine’s settings and automatically run
the test on the live line tool. There are also 4 user-defined test modes available, as well as a mode for manual control of the entire system.
IndicatorsAll LED light indicators operate in a failsafe mode by remaining lit at
all times while active. The lights flash when indicating. A red “HIGH
VOLTAGE FAILURE” light is provided on each current measurement point. A red “FAIL” light and a green “TEST COMPLETE” light are
provided on the control panel. The LCD current display shows the current leakage current, as well as saving the peak current. After a
failure, the LCD display also indicates which position failed.
OperationThe sticks are loaded into the tester. The act of loading the sticks
wraps the electrode around them. Care must be taken around metallic hardware to prevent flashovers. Insulation of hardware, or removal of
electrode positions, may be required depending on the sticks loaded and their hardware. The operator selects the test setting from the
menu, and pushes the “START” button.
The automatic high voltage cycle includes raising and lowering the
voltage to the setpoint, automatic timing of the test, and automatic
visual and audible indication of pass or fail. A stick which fails will stop the test, cause a steady audible signal, indicate which position
has failed, and discharge any remaining voltage. A red fl ashing light is
provided both at the current meter and at the position which failed, to allow quick determination of the failed portion.

The VON Corporation

1038 Lomb Avenue SW
Birmingham, AL 35211

(205) 788-2437

CONTACT US
We have a few fans:
Wish all manufacturers responded the way Von does. They bend over backwards to get it done and keep the customer happy.
— Greg Manitoba, Linestar
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