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To connect copper-to-aluminum terminals:
1.
Except for plated surfaces, clean all contact
surfaces of conductors and fittings using a stiff
wire brush to remove heavy oxide coatings
until the aluminum finish is visible and
restored.
2.
Prepare any bare copper surfaces in the usual
manner.
3.
Coat these now clean contact areas with a
liberal amount of corrosion inhibitor such as
NO-OX-ID “A Special” or no. 2 EJC.
4.
Abrade the contact surface through the
corrosion inhibitor using a stiff wire brush.
Notice: Do not remove the electrical joint grease
.
5.
Connect the terminals and torque the bolts as
per Table 1.
MAINTENANCE
WARNING
Before servicing the switch, be sure it is
disconnected from all electric power
sources and properly grounded.
Maintaining the TTR8 Switch includes inspection.
The frequency of inspection depends upon
atmospheric
conditions
and
frequency
of
operation. The service interval is largely
determined
by
the
user.
Recommended
maintenance is similar to that listed in the latest
industry standards.
1
Complete the maintenance checklist items
listed in the table to assure that all proper
maintenance is carried out.
1
ANSI C37.35 (American National Standard Guide for
the Application, Installation, Operation and
Maintenance of High-Voltage Air Disconnecting and
Interrupter Switches)
Notice: Contaminated
environments
or
operation in sleet conditions also may require
applying the lubricants at pivot points. The
grease should be durable and able to retain its
viscosity over a wide temperature range
.
Field Lubrication of Outdoor Switches
*None required at installation unless switches were
exposed to abnormal conditions during storage for a
considerable length of time. During regular
cleaning, give them a light coat of grease.
Table 1
RECOMMENDED TORQUE
FOR ALUMINUM BOLTS
Bolt
Diameter,
Inches
Lubricated Threads
Dry Threads
In. – Lbs. Ft. – Lbs. In. – Lbs. Ft. – Lbs.
1/2
240
20
420
35
5/8
480
40
720
60
3/4
720
60
1140
95
TTR8 Switch Maintenance Checklist
Item to Check
Check
Under normal service conditions,
inspect the jaw contacts at least
once a year.
Examine contacts to be sure that
they are aligned, clean, and have
a firm uniform pressure.
If contacts are pitted or burned,
remove and replace the old
contacts with new ones.
Clean the contact surfaces
thoroughly by scraping off any
contamination or deposit.
After cleaning the contacts,
apply a coat of lubricant, either
Mobil 28 Grease or NO-OX-ID
Grade “A” Special.
Table 2
Lubrication Guide for Outdoor Switch Components
Part Name
Type Lubricants
Recommended
Amount
Applied
Qty. Req’d. for
(6) Three-pole
Switches
Jaw Fingers
NO-OX-ID Grade “A”
Special or Mobil 28
Grease
Medium
Coat
Blade Ends
NO-OX-ID Grade “A”
Special or Mobil 28
Grease
Medium
Coat
(1) Quart
Pins On current
carrying parts
Mobil 28 Grease or DC-4
*
Pins On control
parts
Mobil 28 Grease or DC-4 Light Coat
(1) Quart
Bearing Areas
On control parts
Mobil 28 Grease or DC-4
Medium
Coat
Terminal
Connections
NO-OX-ID Grade “A”
Special or NO 2 EJC
Heavy
Coat
(1) Quart
