Electric utility operating system reliability is an important factor of utility performance. As a common practice, distribution arresters are assembled with a ground lead disconnector (GLD) designed to respond to arrester fault current during a short by detonation of a cartridge inside of the disconnector housing.
Responding to concerns that conventional brackets were difficult to install, Hubbell Power Systems, Inc. engineers designed a crossarm bracket that saves time, improves safety, and offers a better fit. The Hubbell Easy-On Crossarm Mounting Brackets are used for mounting cutouts, arresters, cable terminators, or cutout-arrester combinations to a distribution pole crossarm.
Save time and money spent lowering the oil level in the transformer, when replacing higher current bushings, by specifying the PCORE® Electric Company, Inc. Quick-Link bushing.
In 1999, PCORE launched the first Quick-Link bushings that allowed electric utilities to save costs by significantly reducing transformer outage time. The design was further expanded to 115kV and 138kV in 2017. PCORE’s Paper-Resin-Capacitor (PRC) and Paper-Oil-Capacitor (POC) Quick-Link bushings have the following benefits:
CHANCE® meters are used to detect line voltage, determine approximate phase-to-phase-voltage, check DC resistance in protective grounding sets, determine in-or-out of phase relationships, monitor leakage currents, and advise the operating condition of CHANCE hot sticks. Calibration of these meters is important in confirming their accuracy in the field and ultimately in helping to protect line personnel.
Incorrect meter readings could result in undetected or misread voltages that could be harmful to equipment and personnel.
The PCORE® SET-Terminal is designed for use with field dielectric test equipment for more accurate, faster, and safer field power factor measurement of apparatus insulation at a substantial savings.
PCORE Electric launched the SET-Terminal in 2011 as an addition to their test terminal line. The SET-Terminal provided improvements from the traditional porcelain test terminal that has been used by utilities since the 1950’s.
Benefits of the SET-Terminal include:
- A faster testing process.
- Safer testing for test technicians.
- Less expensive testing because of less labor hours and equipment down time.
Fiberglass Guy Strains may be installed anywhere along the guy wire to help protect against stray current that may be on the guy caused by lightning strikes or other sources. These fiberglass units serve as a replacement for porcelain insulators or johnny balls, and they extend the insulation length. They offer numerous advantages, including:
- variable lengths
- easy terminations
- resistance to fracture caused by brittleness
On Sunday, June 9, 2019, a severe storm hit Dallas-Fort Worth, Texas resulting in more than 350,000 Oncor customers losing power. Reported as the sixth largest storm in Oncor’s history, Hubbell Power Systems, Inc. immediately offered support to help restore power as quickly and safely as possible.
Topics: Storm Response
No more squinting to read the voltage from the end of the hot stick – or relaying information to the crew on the ground. The new CHANCE® Transmission Multi-Range Voltage Indicator® (TMRVI), lets your entire team accurately monitor transmission voltages on a mobile device or Apple Watch using the free MRVI app with an easy-to-read interface.
Here are five ways linemen can ensure their temporary protective cover-up equipment continues to function safely and for as long as possible:
- Take a close look every day
Don’t assume a cover is ready to use. Cover up may look fine at a glance, but it’s worth looking a little closer. Stretch out your rubber covers with a rolling or peeling action and look for cracks, scratches, moisture, or other defects. If you find something concerning, remove it from service and tag it to be tested or discarded. Check the inside and outside surfaces as some defects may be hiding inside.
Topics: Lineman Grade Tools
There are three distribution arrester types commonly used to protect overhead distribution equipment from the damaging effects of overvoltage. IEEE C62.11 defines Normal Duty (ND) and Heavy Duty (HD) classes by their ability to withstand certain current impulse levels. The third, Heavy Duty Riser is a type, or variation, of the HD classification and utilizes a larger diameter Metal Oxide Varistor (MOV) disc.