Properly inspecting and storing your rubber insulating gloves could save your life. Rubber insulating gloves are the first line of defense against electric shock. ASTM F496 requires that rubber insulating gloves be inspected and electrically tested at a maximum interval of every six months, whereas field inspection is necessary prior to each use. The date code on the rubber insulating gloves should be checked to verify the most recent testing of gloves is still valid.
The FlexMO has the ability to operate switches from 15 kilovolts to 765 kilovolts with five different open and closed speeds to choose from, and even the ability for two-speed closing and opening, which can help reduce stress on the switch. The FlexMO has the option to use SCADA technology to open and close the switch remotely. Easily switch between local and remote modes on the control panel.
Topics: Switching & Fusing
Multiple variations of the Versa-Tech® recloser are available to fit any single-phase application on the system, outside substation or anywhere down the line. The same base design allows for easy adaptation for engineering and linemen.
Linemen often ask about the life expectancy of a hotstick. While there is no exact answer to this question, it can range anywhere from hours or days for a hotstick that is abused and damaged, to years or decades for a hot stick that is well cared for and maintained. While the hours or days is hopefully the exception, on occasion a hotstick does come back to the factory with tire tread marks on it or with damage that clearly indicates it was dropped from some height, probably around the height of the primary on a wood pole. While an “accident” can cut the life of a hot stick short, there are a number of steps in the care and maintenance of a hot stick that can result in many years or even decades of service and protection for the linemen using them.
Topics: Lineman Grade Tools
In 2014, a new generation of the Versa-Tech® recloser was introduced. The Versa-Tech II recloser was built on its predecessor’s, the Versa-Tech I, foundation with a number of additional capabilities such as protection, monitoring, and logging features.
To support design and development activities, we maintain a fully equipped electrical and mechanical test facility with the capability of performing virtually all of the industry required tests, including ANSI, IEC and CSA.
There are several types of automatic circuit recloser technologies for the electric utility industry. Each technology incorporates various feature classifications: number of phases, voltage class, medium for interruption, and control mechanism type. Both Oil Circuit Reclosers (OCR) and Electronic Reclosers have been in the industry for quite some time. Each of these recloser types provides a unique benefit to the power grid but also both present certain challenges.
There are four common pilot protection schemes for line protection used today: (1) Direct Underreaching Transfer Trip, (2) Permissive Overreaching Transfer Trip, (3) Direct Comparison Unblocking, and (4) Direct Comparison Blocking. We will examine the communications channel requirements and channel types used for each of the schemes.
Power lines that are commonly seen in residential areas are not insulated and contain at least 7,000 volts. One should never be in close proximity to a power line that is hanging low or lying on the ground. Even if the line is not sparking the line is still not safe to touch or be near.
Topics: Storm Response
In order to better serve our customers, we now provide a quick ship program for our enclosure product line. This is a value-added service provided in an effort to respond to urgent needs. The shipments are processed out of our facilities in Lenoir City, Tennessee and Rocky Mount, North Carolina.