Advertisement
—
Instructions for installation, use and
maintenance for current instrument
transformers
These installation, use and maintenance instructions apply for current
instrument transformers intended for indoor operations.
The instructions refer to current instrument transformers of the following types:
—
01 Example of current
ELK-CT0 145 LG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 40 kA/3s and 3150 A
transformer rating plate
ELK-CT0 145 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 40 kA/3s and 3150 A
ELK-CT0 170 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 63 kA/3s and 4000 A
ELK-CT0 735 FG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 170 kV, 63 kA/3s and 3150 A
ELK-CT0 170 F/735 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 170 kV, 63 kA/3s and 4000 A
ELK-CT0 520 LK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 40 kA/3s and 2500 A
ELK-CT0 520 LG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 40 kA/3s and 3150 A
ELK-CT0 735 L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 63 kA/3s and 4000 A
ELK-CT0 520 F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .up to 145 kV, 40 kA/3s and 2500 A
1. Service conditions
Indoor transformers
The transformers are installed in compartment
with SF6 insulation gas. Before the installation
transformer has to be kept in dry and indoor con-
ditions where the air is not significantly polluted
by dust, smoke, corrosive gases, vapors or salts.
The transformers are designed for standard am-
bient temperatures between -30°C and +40°C and
altitudes below 1000 m above sea level. Different
ambient temperatures can also be agreed upon
with the customer.
2. Technical details
Technical details and specifications of each of the
transformers are shown on a rating plate. It is not
allowed to operate the transformer at values ex-
ceeding the name plate data.
Dimensional drawings of transformers ELK-CT0
are shown in Appendix 2.
up to 170 kV, 63 kA/3s and 3150 A
up to 170 kV, 63 kA/3s and 3150 A
—
01
Where:
1)
type code of transformer
2)
configuration
3)
year of manufacture
4)
serial number
5)
operating frequency
6)
corresponding standard (standards)
7)
insulation levels
8)
rated short-time thermal current
(duration)
9)
additional standard
10)
rated continuous thermal current
11)
rated dynamic current
12)
ratio
13)
parameters of 1st core (terminal mark-
ing, transformer ratio, rated output (bur-
den), accuracy class, extension)
3
Hide quick links:
Advertisement
