ALT Series - AC High Voltage Aerial Lift Dielectric Test Set

0 – 300 kV AC Power Frequency AC Hipot

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Features and Benefits

The ALT-300F from our ALT Series of field portable AC hipot test sets is primarily designed for testing the dielectric strength of aerial lifts, booms, and bucket trucks per the ANSI 92.2 standard. With a continuously adjustable AC voltage, 2 range voltmeter, multi range current meter and built in timer, the ALT Series are also a great choice for a pass/fail, AC over-voltage withstand testing on larger capacitive loads such as switchgear, buss duct or other substation apparatus. For lower power requirements please see our PFT Series and ABT Series. For higher power requirements see our FPA, HPA and PAR lines.


  • Secondary connected 2 Range Voltmeter: 120/300kV
  • 2 Range Current Meter: 0-250uA and 0-1.0mA with x1, x10, x100 multipliers up to 100 mA
  • 19 inch rack benchtop style control
  • Fixed overload set to 120% of variable transformer rated output current
  • Transit protected meters prevent meter damage between test sites
  • Guard/Ground circuit for accurate leakage current measurement
  • Zero Start and External safety Interlock provisions


Input: 230 V, 50/60 Hz, 30 A
Output: 300kV AC, 7kVA resistive load
7kVA capacitive load
Output current is reduced at lower voltages
Duty: 7kVA: 1 hour ON, 2 hour OFF
5 kVA: continuous
Voltmeter: 3.5”, scaled 120/300kV kV AC, ±2% F.S.
Current Meter: 3.5”, scaled 0-250uA and 0-1.0mA ±2% F.S. with range

multipliers of x1, x10, x100 up to 100 mA

Distortion: Less than 5%
Size and Weight:
(W x D x H)
Control: 21 x 15.5 x 15.25 in., 80 lb.
534 x 394 x 387 mm, 36 kg
HV Tank: 28 x 28 x 69 in., 1050 lb.
712 x 712 x 1753 mm, 476 kg
Output Termination: Top toroid
Scope of Supply: 20ft black ground lead, 20ft shielded return cable, external
interlock plug, operations manual, calibration certificateALT Series: Other models are available from 100 kVac – 300 kVac, 7.2 kVA

ALT Series: Other models are available from 100 kVac – 300 kVac, 7.2 kVA

Optional Accessories

Hand & Foot Safety Switches

  • PN 90-405
  • PN 90-410

Safety Ground Sticks

  • 10 inch PN 88-113
  • 14 inch PN 88-150

Optional Upgrades

  • Digital Metering – Add Suffix “D”
  • Secondary Capacitance
  • Cancellation Circuit – PN 90-225
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