POLYMER-HOUSED ARRESTERS EVP - SERIES
Installation Instructions: 17-5156
Introduction
Hubbell Power Systems surge arresters are designed to limit
surge voltage by conducting the surge current to ground,
and thus avoiding equipment damage. The arresters are of
single pole design, suitable for outdoor use, and designed in
accordance with the latest revision of industry standard IEEE
C62.11 and IEC 60099-4.
Each EVP arrester contains a number of vertically stacked zinc
oxide valve elements overwrapped with an epoxy-impregnated
fiberglass filament wrap, contained within ESP® polymer
weathershed housing(s). The metal end fittings attached to the
housing(s) vary with the specific design ordered.
Three arresters are required for three-phase installation. With the
exception of special multi-rated designs, arresters are shipped as
a single assembled unit. Multi-rated arresters consist of separate
units that must be stacked and bolted together in the field.
Application
Initial Inspection
Rough handling can result in damage to the surge arrester.
Arresters should be carefully removed from the carton or crate
for inspection. If damage is apparent, do not install the arrester.
Claims for shipping damage should be registered immediately
with the common carrier.
The arrester model number, rated voltage (Ur for IEC arresters),
and MCOV (Uc for IEC arresters) are identified on the arrester
nameplate. The nameplate information should be checked
against the shipping memorandum.
Line and Ground Connections
Line and ground hardware are shipped unassembled to the
arrester and will be contained inside the carton or crate. Install
supplied line and ground terminals to the arrester as indicated
on the outline drawing. Connect the arrester ground to the
apparatus ground and the main station ground, utilizing a reliable
common ground network of low resistance. Line connections
should not place excessive mechanical stress on the arrester.
Installation Location
Install the arrester electrically as close as practicable to the
equipment to be protected. Keep the arrester connections short
and direct. The footings of all outdoor piers or supports should
extend below the frost line and be elevated above the ground
line sufficiently to meet personnel safety requirements.
Altitude and Temperature
EVP-series arresters can be used from 0 to 12,000 feet (3600m)
altitude. These arresters can be used in locations where the
maximum temperature does not exceed 60° C and where the
weighted average temperature does not exceed 45° C. The
minimum operating temperature is -60° C.
Mounting
Ensure that all feet are firmly positioned before drawing down
foundation bolts to avoid unnecessary stresses in the end fittings.
Tighten the bolts firmly.
It is permissible to mount some lower voltage arresters
horizontally. However, please consult your HPS sales
representative to be sure that horizontal mounting is permissible
for a particular arrester.
!
CAUTION
The equipment covered by these instructions should be installed and serviced only by competent personnel familiar with
good safety practices. This instruction is written for such personnel and is not intended as a substitute for adequate training
and experience in safe procedures.
!
WARNING
Prior to installing this product, check the nameplate information to verify that it is the correct product for the
application. Verify that the nameplate information corresponds to the information provided on the outline drawing.
!
WARNING
EVP Arresters must be applied where the continuous
phase-to-ground voltage at the arrester location does
not exceed the arrester continuous voltage capability
as indicated on the nameplate. Arrester physical size
may not determine the voltage rating. Do not install
arrester If type, rated voltage (Ur for IEC arresters) and
maximum continuous operating voltage (Uc for IEC
arresters) are not exactly the same on the nameplate
and packaging labels.
Stud Size
Maximum Recommended
Tightening Torque
3/8"
20 ft-lb (27 Nm)
1/2"
40 ft-lb (54 Nm)
3/4"
125 ft-lb (170 Nm)
EVP Series - Rev 05/2020
