3
1. Service conditions
Indoor and outdoor transformers
The transformers ELK - CN3, ELK - CN14 and
CN14C without a primary conductor are designed
for installation in gas-insulated switchgear for in-
door and outdoor applications.
The transformers are designed for standard am-
bient temperatures between -25°C and +40°C and
altitudes below 1000 m above sea level. Different
ambient temperatures can also be agreed upon
with the customer. The transformers are de-
signed for protection class IP54.
2. Technical details
Technical details and specifications of each of the
transformers are shown on a rating plate fixed to
the terminal box. It is not allowed to operate the
transformer at values exceeding the nameplate
data.
Dimensional drawings of transformers ELK - CN
are shown in Appendix 2.
—
01
Where:
1) CN14C
type code of transformer
(ELK CN3-720 / ELK CN3-
1080 / ELK CN14-560 /
ELK CN14-840 / CN14C )
2) 2016
year of manufacture
3) 1VLT..........
serial number
4) 50 / 60 Hz
rated frequency
5) IEC 61869-1/-2
corresponding standard
(standards)
6) 245/460/1050kV voltage level
7) 50kA/ 3s
rated short-time thermal
current / duration
8) or.n.:
order number
9) Icth = 3150A
rated continuos thermal
current
10) Idyn = 135kA
rated dynamic current
11) 3150//1/1/1/1A
rated transformer ratio
12) 1S1-1S2, 2S1-2S2… parameters of all cores
13)
additional specifications
if required
14)
weight, material number,
insulation class
—
01 Example of current
transformer rating plate
—
Instruction for installation, use and
maintenance
These installation, use and maintenance instructions apply for current instrument
transformers intended for indoor or outdoor operation. The instructions refer to:
Current instrument transformers for indoor or outdoor use, of the following types:
ELK - CN3–1080mm, ELK - CN3–720mm, ELK - CN14–840mm, ELK - CN14–560mm,
CN14C
