Surge Arresters
UltraSIL™ Housed VariSTAR® Surge Arresters
10 kA Class 2 – IEC 60099-4 for MV Systems to 30 kV
Installation and Service Instructions
Service Information
IS235-39-1
GENERAL
The Cooper Power Systems UltraSIL™ housed
distribution class MOV arresters provide overvoltage
protection to medium voltage electrical distribution
systems.
STAINLESS STEEL
LINE TERMINAL
METALLIC ELECTRODE
ULTRASIL SILICONE
RUBBER HOUSING
CAUTION: This arrester should be installed
only by personnel familiar with good safety
practice and the handling of high voltage electrical
equipment. These instructions are not intended to
supersede or replace your company’s safety and
operating procedures. The installation requirements
of national and local codes must be observed.
!
WARNING: Always handle surge arresters –
packed or unpacked – carefully. Do not drop,
jar, or handle an arrester roughly. Dropping, jarring,
and rough handling may damage the arrester.
Concealed internal damage and external damage can
shorten the service life of the arrester significantly.
Never install a damaged arrester. A damaged arrester
may react violently, causing severe personal injury
and property damage.
METAL OXIDE
VARISTOR (MOV)
DISKS
METALLIC
ELECTRODE
!
CAUTION: Do not install an arrester if the
voltage rating (Ur), and COV (Uc) data are not
exactly the same on the arrester nameplate and the
carton label. Do not install the arrester if the COV (Uc)
is less than the maximum line to earth system voltage.
Erroneous installation may cause a violent fault on
the system with the potential for personal injury and
property damage.
!
OPTIONAL
EARTH LEAD
DISCONNECTOR
INSTALLATION
■
■
Pres. Rel.
40 kA rms
Cert.
IEC60099-4
Cat. No. __________
Serial No. _________
Frequency
Altitude
50-60 Hz
0-12000 ft.
0-3600 N
VARISTAR® SURGE ARRESTER
ULTRASIL™ TYPE UHS-ZNO
IN = 10 kA CLASS 2 IEC 60099-4 P.R. = 40 kA sym
■
UltraSIL Arrester Auxillary Nameplate
UltraSIL Nameplate Stamped in Stainless Steel
Top Cap.
CAUTION: Make all electrical connections –
earth and line – so that no undue mechanical
stress is applied to the surge arrester. Excessive
mechanical stress will damage the arrester.
!
STAINLESS STEEL
EARTH TERMINAL
OPTIONAL
INSULATED
MOUNTING
BRACKET
In the event that your company has not established
safety and operating procedures for installing surge
arresters to, or removing them from a circuit, we
suggest the following:
YYYY
RATING, Ur
___ kV rms
COV, Uc
___ kV rms
Class 2
SOLID, BONDED
HOUSING INTERFACE
FIBERGLASS REINFORCED
EPOXY
AUXILIARY
NAMEPLATE
Figure 1.
Cutaway illustration of an UltraSIL housed VariSTAR
arrester.
■
Olean, NY USA
VariSTAR Surge Arrester
STAINLESS STEEL CAP
WITH STAMPED PERMANENT
PRODUCT INFORMATION
■
■
Install all mounting hardware on the arrester. Torque
the insulated mounting bracket hex nut to 27 Nm (if
bracket is supplied).
De-energize the electrical system.
Select a mounting location as close as possible to the
apparatus that the arrester is to protect. Make the line
lead and earth lead as short and direct as possible.
Connect the earth lead to the arrester earth terminal
stud. Torque the hex nuts to 27 Nm, maximum.
NOTE: Make the arrester earth connection as
short and direct as possible to a solid, effective,
permanent, low-resistance earth connection. If the
arrester has an earth lead disconnector (isolator), the
earth lead must be flexible to allow the disconnector
to operate properly.
Connect the line lead to the arrester line terminal stud.
Torque the hex nut to 27 Nm, maximum.
Energize the electrical system.
These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide
directions for meeting every contingency during installation, operation, or maintenance. When additional information is desired to
satisfy a problem not covered sufficiently for the user’s purpose, please contact your Cooper Power Systems sales engineer.
April 2003 • New Issue
Printed in U.S.A.
1
UltraSIL™ Housed VariSTAR® Surge Arresters 10 kA Class 2 – IEC 60099-4
for MV Systems to 30 kV Installation and Service Instruction
ARRESTER
CANTILEVER
STRENGTH IS 115 Nm
FOR ALL RATINGS
USING INSULATED
MOUNTING
BRACKET
DIAMETER (ALL FIGURES):
106 mm
MOUNTING HOLE
FOR 1/2" OR 12 MM Ø
HARDWARE
MOUNTING HOLE FOR
1/2" OR 12 mm Ø
HARDWARE
ULTRASIL HOUSED ARRESTER – WITH
OPTIONAL INSULATED MOUNTING
BRACKET AND NO DISCONNECTOR
ULTRASIL HOUSED ARRESTER – WITH
OPTIONAL INSULATED MOUNTING
BRACKET, AND DISCONNECTOR
ARRESTER
CANTILEVER
STRENGTH IS
300 Nm
(ALL RATINGS)
MOUNTING HOLE FOR
1/2" OR 12 mm Ø
HARDWARE
ULTRASIL HOUSED ARRESTER WITH OPTIONAL
CONDUCTIVE BRACKET AND
WITHOUT DISCONNECTOR
ULTRASIL HOUSED ARRESTER – WITH NEMA
CROSS-ARM HANGER
Figure 2.
UltraSIL mounting options.
■
OPTIONAL INSULATED
MOUNTING BRACKET
Mark the temporary earth connection to make sure it is
removed before the arrester is reinstalled.
Disconnect the arrester earth lead(s) from the circuit.
Energize the electrical system.
HEX NUT*
■
LOCK WASHER
■
FLAT WASHER
FIELD TESTING
NEMA
HANGER
BRACKET
(OR OTHER)
All UltraSIL housed arresters have passed a complete
series of production tests prior to shipment; therefore, no
field testing prior to initial energization is necessary. Never,
even briefly, apply any power frequency voltage in excess
of COV (Uc) as stamped on the arrester top cap. There
are currently no industry accepted methods for field
testing of arresters.
(1/2" OR
12 mm Ø) BOLT
CAUTION: Before performing any test on an
arrester, contact Cooper Power Systems. Test
procedures may damage the arrester externally and/or
internally, shortening its service life significantly.
!
INSTALLATION OF ARRESTER TO NEMA HANGER BRACKET.
Figure 3.
Installation of arrester to NEMA hanger bracket.
*Torque of hex nut to 27 Nm max.
REMOVING AN ARRESTER FROM A
CIRCUIT
■
■
■
De-energize the electrical system.
Disconnect the arrester line lead(s).
NOTE: A small amount of static charge may be
retained in an arrester when it is removed from an
energized circuit.
Discharge the arrester by attaching the line terminal
to a temporary ground.
© 2003 Cooper Industries, Inc.
VariSTAR® is a registered trademark of Cooper Industries, Inc.
UltraSIL™ is a trademark of Cooper Industries, Inc.
Rev. 0
2
WARNING: Always consider an arrester to be
energized until both the line and the earth leads
have been disconnected.
!
Cooper Power Systems, Inc. reserves the right to make changes to
its product specifications, performance data or characteristics, at any
time, without prior notice, and without creating any obligations on its
part. Accordingly, the use of the information contained herein creates
no liability on the part of Cooper Power Systems, Inc.
P.O. Box 1640
Waukesha, WI 53187
www.cooperpower.com
MI
4/03