HUBBELL POWER SYSTEMS
15kV Loadbreak Elbow
Hubbell Loadbreak Elbows provide utilities with products having high
reliability and low maintenance expense. The elbow, when mated with a
loadbreak bushing product meeting the requirment of IEEE Standard
386, is suitable for energized loadmake / loadbreak operations by a
qualified lineman using a shotgun-type hot stick.
Molded external shield-conductive, abrasion resistant 1/8-inch
thick shield of peroxide cured EPDM.
EPDM insulation - cured with peroxide process provides superior
stress-relaxation characteristics and assures long life under
high-ambient temperatures. Compatible with polyethelene,
crosslink polyethelene and EPR insulations.
Molded conductive insert - guards against high electrical stress
from corners of crimped connector
Hot-stick operating eye - reinforced with stainless steel ring.
Withstands 500-pound pull and 10 foot-pound torque, per mits
energized loadmake-loadbreak operation with hot-stick tool.
Compression connector - meets requirements of ANSI C119.4/NEMA
CC3 for Class A connectors.
Test point - allows voltage indication when readout is made
with suitable high-impedance devices. Elbows are available with
or without this feature.
Cable entrance - has conductive rubber stress relief area which
contacts extruded cable insulation shield. Elbow model selected
to assure interference fit along cable insulation surface
providing proper creep distance and water-tight fit.
Grounding tab - designed so that a single #14 awg copper wire
can be inserted in the hole. Use of a separate wire is
White-black-white-band - identifies elbow (and mating bushing
insert) as having phase-to-ground and phase-to-phase voltage
rating. Both the black and white bands are individually removable
Interface - to allow interference-fit seal when installed on
mating component designed to IEEE Standard 386. Provides proper
creep distance and water-tight fit, yet permits unplugging of
elbow after years of service.
Locking ring - is a part of IEEE Standard 386 requirement.
Provides positive gripping. Initial pull-off force to unseat
from mating groove in bushing insert produces fast break
necessary for loadbreak switching.
Probe - mates with pinch-finger contactsin bushing insert, or
other switch point. Inner end has threads with pilot to aid
installation in crimped connector without thread stripping.
Outer end is made of ArcMate™ ablative material that produces
gas when exposed to loadbreak arc, permitting reliable
interruption even with close ground spacing.