What is Hot line Insulator Washing?

Hot Line  (aka Live Line) insulator washing is a procedure to clean dirty or  contaminated insulators using a high pressure, high flow water stream.  Insulators are washed to prevent flashovers.  The water used must have  low conductivity.  The typical upper limit for conductivity is approximately 400 Micro-Siemens.  The water pressure is approximately 400 to 500 psi at the nozzle and typically under 200 psi at impact with the insulator. Normally only glass and porcelain insulators require live line washing. In polluted environments, it may be necessary to wash multiple times per calendar year.


Insulator Washing Units

Note: All Insulator washer units are custom manufactured to the end user specifications.  So any specifications given can be modified as necessary.

Insulator washer skids

Mount this unit on your own truck chassis.

Insulator washer trailer

Trailer unit - perfect for washing substations.  These units are custom built to your specifications.

Integrated washer unit

Order a fully integrated unit with an aerial platform.

Washing videos

Technical Specifications

Base skid is Fabricated of Steel Channel,Tool Storage Compartment
 with Integral CrossmembersAccess Steps to Reach Access Dome
Diesel Engine, 110 HP @ 2,500 RPM, Four CylinderHand-Held Wash Gun
Stainless Steel Water Tank, 304 Stainless SteelThrottle
Electronic Water Level Sensor is ProvidedConstant Conductivity Monitor Provided in Tank
Four Lifting Eyes Provided for Removing Tank When EmptyPortable Resistivity Tester
Four-Stage, High-Pressure Centrifugal Water PumpAutomatic Low Water Shutdown
Top or Bottom Fill Available on Water Tank with StrainerPainted White
Hose Reel – Electric Rewind with 150 ft (45.7 m) Length ofTwo (2) Operator’s and Two (2) Maintenance/ Parts
3/4 in (19 mm) Diameter Hose, Non-ConductiveManuals
Second Wash Gun Assembly, Includes Reel, Hand-HeldWash Gun Grounding System
Wash Gun, and Throttle SystemExtra Manuals
Spare Wash Gun AssemblyMild Steel Tank
Spare Water Nozzle(s)Auxiliary Input System
Different flow Nozzle diametersAuxiliary Output System
Additional Portable Conuctivity TesterSpare Tire and Wheel
Trailer Grounding SystemDifferent hose lengths
Tank Capacity as required
Operating Range with 1/4” (6.4 mm) Nozzle-
Each Gun Flow Adjustable to Maximum44 GPM167 LPM
Each Gun Pressure Adjustable to Maximum
Single Wash Gun Each800 PSI5,515 kPa
Two Wash Gun Each650 PSI4,481 kPa
7540 lbs3423 kg