OEM Equipment
Catalog Data
CA800023EN
Effective August 2015
Supersedes 800-16 August 2012
COOPER POWER
SERIES
1210 – 2410 A 1.2 kV class externally
removable secondary bushings
General
Eaton's Cooper Power™ series 1210-2410 A
secondary bushings are designed for external
mounting and removal on distribution transformers
filled with transformer oil, Envirotemp™ FR3™
fluid, or an approved equivalent. They are designed
for use inside cubicles of fluid-filled transformers.
Tin plated spade terminations are dimensioned
per IEEE Std C57.12.26™ standard for use with
most available connectors and terminals, allowing
a wide range of applications. The external spade is
available in 6, 8, or 12 hole configurations with a
two-hole internal spade.
The secondary bushings are molded with a
specially formulated high strength epoxy. The
gasket surfaces are tapered to provide controlled
compression and containment of the highly
resilient Buna-N rubber gasket.
Installation
Clamping studs must be welded around the 2.25
inch hole to accommodate the clamp. The gasket
is installed over the bushing shank onto the
bushing gasket surface. The bushing assembly
is installed through the tank hole and the clamp
is placed over the studs against the shoulder
flange of the bushing. A plated lockwasher and
nut are installed on each stud and tightened
to the recommended torque. Refer to Service
Information S800-16-1 1.2 kV Class Secondary
Bushing Installation Instructions for details.
Catalog Data CA800023EN
1210 - 2410 A 1.2 kV class externally removable secondary bushings
Effective August 2015
Ø 0.56"
“A” Required
(14 mm)
1/4"-20 x .75" Deep
Support Hole
(All Suffixes)
Ø 0.33" For Ground Strap
(8.4 mm)
G
F
4.00"
(101.6 mm)
1.25"
(31.8 mm)
1.75"
(44.5 mm)
Ø 2.20"
(55.9 mm)
2.02"
(51.3 mm)
1.75"
(44.5 mm)
0.88"
(22.4 mm)
C
Ø 2.87"
(72.9 mm)
D
.500"
(12.7 mm)
Ø 0.56"
“B” Required
(14 mm)
E
Figure 1. 1210-2410 A 1.2 kV Class externally removable secondary bushings.
Notes:
Dimensions given are for reference only.
All Sizes have external end support holes.
Table 1. Voltage Ratings and Characteristics
Table 2. Current Ratings and Characteristics
Description
kV
Description
Amperes Continuous
Standard Voltage Class
1.2
Aluminum Bushing
910-1210 A rms
ac 60 Hz 1 Minute Withstand
10
Copper Bushing
1390-2410 A rms
BIL and Full Wave Crest
30
Current ratings and characteristics are in accordance with IEEE Std C57.12™ standard.
Ordering information 1210-2410 A
secondary bushing-inline
To order 1210-2410 A secondary bushing, specify the catalog
number as listed in Table 3. (Gasket and clamp must be ordered
separately, see Table 4.)
Table 3. Secondary Bushing Dimensions In./mm.
Catalog Number
2
Quantity of Holes
Dimensions in./mm
A
C
D
E
F
G
6.40
8.77
14.33
1.75
2.50
(162.56)
(222.75)
(363.98)
(44.45)
(63.50)
8.15
10.52
16.08
1.75
2.50
(207.01)
(267.20)
(408.43)
(44.45)
(63.50)
11.65
14.02
19.58
1.75
2.50
(295.91)
(356.11)
(497.33)
(44.45)
(63.50)
6.40
8.77
14.33
1.75
2.50
(162.56)
(222.75)
(363.98)
(44.45)
(63.50)
8.15
10.52
14.83
–
1.25
(207.01)
(267.20)
(376.68)
–
(31.75)
11.65
14.02
19.58
1.75
2.50
(295.91)
(356.11)
(497.33)
(44.45)
(63.50)
B
2690225D04
6
2
2690225D06
8
2
2690225D16
12
2
2690225D10
6
2
2690225D12
8
2
2690225D24
12
2
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Material
Aluminum
Aluminum
Aluminum
Copper
Copper
Copper
1210-2410 A 1.2 kV class externally removable secondary bushings
Catalog Data CA800023EN
Effective August 2015
2.25"
(58 mm)
2.315"
(58.8 mm)
4.83"
(123 mm)
30°
1.68" Rad.
(42.6 mm)
0.156" Rad.
(3.96 mm)
Figure 4. Standard hole for all bushings.
120°
0.179"
(4.55 mm)
1.125"
(29 mm)
.438" x .562"
OBROUND SLOT
Ø 2.19"
(55.6 mm)
Figure 2. 3-hole clamp.
1.63" SQ.
(41.3 mm)
4.25" SQ.
(108 mm)
0.13"
(3.3 mm)
3.25" SQ.
(82.6 mm)
Ø 2.75"
(69.9 mm)
Figure 5. Gasket.
.28" Rad.
(7.1 mm)
0.25"
(6.4 mm)
Figure 3. 4-hole clamp.
NNote: Dimensions given are for reference only.
Table 4. Accessories
Description
Catalog
Number
Figure
Number
4-Hole Square Clamp (3.25 in. C. C. Hole Spacing)
2005835A04
4
3-Hole Triangular Clamp (3.38 in. Bolt Circle)
2037488A03
3
Gasket
0537980C09
6
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3
Catalog Data CA800023EN
1210 - 2410 A 1.2 kV class externally removable secondary bushings
Effective August 2014
Table 5. Recommended Internal (oil side) Connections
Bushing Type
Maximum
Current Rating
Number of
Holes
Sides of Spade
Aluminum
1210 A
2
1
Copper
1390 A
2410 A
2
2
1
2
Notes:
1. Ratings are the maximum current level that can be used with a particular configuration.
2. Ratings are based on maintaining a bushing temperature rise that is no more than 15 degrees
above 85 degree top oil temperature (20 degree ambient) when the bushings are conducting rated
current (IEEE Std C57.12™ standard, Section 5.11)
3. Ratings are based on maintaining a bushing absolute temperature below the level that would
damage the insulation system or seal integrity (with top oil temperature in the range of 113-114
degrees absolute) when the bushing is conducting 150% peak load for 24 hours and 191% peak
load for 2 hours. (IEEE Std C57.92™ standard, Table 3[d])
(All temperature references are in degrees Celsius)
Eaton
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com
Eaton’s Cooper Power Systems Division
2300 Badger Drive
Waukesha, WI 53188
United States
Eaton.com/cooperpowerseries
© 2015 Eaton
All Rights Reserved
Printed in USA
Publication No. CA800023EN
Eaton and Cooper Power are valuable
trademarks of Eaton in the U.S. and other
countries. You are not permitted to use these
trademarks without the prior written consent
of Eaton.
IEEE Std C57.92™, IEEE C57.12™, and IEEE
Std C57.12.26™ standards are trademarks
of the Institute of Electrical and Electronics
Engineers, Inc., (IEEE). This publication is not
endorsed or approved by the IEEE.
IEEE® is a registered trademark of the
Institute of Electrical and Electronics
Engineers, Inc.
Envirotemp™ and FR3™ are licensed
trademarks of Cargill, Incorporated.
For Eaton's Cooper Power series removable
secondary bushing product information
call 1-877-277-4636 or visit:
www.eaton.com/cooperpowerseries.