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Dielectric Testing

Electrical Hot Stick Testing Services

Joseph Coupal - Thursday, August 22, 2019
ETS - Inspection and Testing, Boston, MA

Hot sticks are insulated shaft with fittings on the ends which enable workers to adjust and manipulate live conductors and equipment from a safe distance. They come in varieties of length to serve different use and handle diverse voltage level of the charged equipment.

Today's Hot sticks are made of fiberglass. Previous designs were made from wood treated to be chemical, temperature and moisture resistant.

Here are some of the common types of hot sticks:

  • Telescopic Hot Stick - are made of several hollow, tubular sections which perch inside of each other. It's top part can be extended and locked using a spring-loaded button that clicks open into a hole. It can be extended as many of the parts needed to carry out the work.
  • Shotgun Stick - has a sliding lever mechanism that enables user to open and close the clamp hook at the end part of the stick. It lets the user fasten the stick to a disconnect ring then close it. The shotgun mechanism functions to unlock the hook when the switch is turned on.
  • Universal Straight Stick - it allows different types of tools and equipment to be connected to the hot stick.
  • Measuring Stick - provides easy and accurate method for infield measuring.

Since hot sticks are use when working with live line poles, it's important that these devices are subjected to regular hot stick insulation testing and maintenance. It must be done at least every 2 years. Seeking for a reliable testing company for electric materials, vehicle and other insulated equipment for electrical works, contact ETS Inspection and Testing Services.

Hydraulic Cylinder Repair Tips

Joseph Coupal - Thursday, August 08, 2019
ETS - Hydraulic Repair  - Boston, MA

Hydraulic cylinders are essential components of the commercial hydraulic systems of cranes, forges, construction vehicles, and agricultural machines. They are the actuating mechanical element that enables unidirectional force. Fully integrated hydraulic cylinders are used in exchange for levers and gears. The basic parts of a hydraulic system include cylinders, valves, pumps, filter and many more. Among all these component parts, the hydraulic cylinder is the component that mandates close inspection and more frequent maintenance.

Seal damage is the common cause of hydraulic cylinder failure. It results from corrosion, fitting errors, and improper metalwork clearance. The piston rod or bearings can be damaged through fluid contamination, misalignment of cylinder and load. Also, extreme temperature and chemical action can contribute to the defects. Prior to performing repair, make sure to clean the surface properly and remove the hoses and plugs connected to it. Right after taking off the components, empty all fluid within the cylinder. From here we can start the repairs for the hydraulic system. You need to prepare the following tools:

  • seal kit
  • rubber mallet
  • screwdriver
  • punch
  • pliers
  • emery cloth
  • Torque wrench

Since leaking is the usual problem encountered in hydraulic systems, repair process involve dismantling the cylinder, proper diagnosis of the failure, faulty part repairs / replacement and cylinder rebuild. When doing this, it’s important to consider the following repair tips:

  1. When dismantling the hydraulic cylinder make sure to check all components not only the faulty parts.
  2. Do not forget to put back the hydraulic wear bands for this guide ring will help lessen metal-to-metal contact.
  3. A bent or curve in the rod is an indication of an early defect of rod seals.
  4. Always use the right fit tools when repairing to avoid metal surface scrapes that can turn to corrosion issues in the long run.
  5. Be careful when handling larger hydraulic cylinder for they are utilizing high tension springs to operate.
  6. When replacing seals, measuring the current size of the seal is not advisable for it will expand or shrink depending to environmental condition.

Make sure to always inspect the seal, rod and bearing when performing maintenance procedure. If you notice a rough surface in the rod, this indicates the hydraulic system is imperiled. This will increase the friction so it's important to polish it to minimize rubbing and prevent corrosion. Performing regular hydraulic system maintenance and repairs will minimize defects and failures in your equipment. For more information about hydraulic system repairs, contact ETS Inspection and Testing Services.


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