7
9. Normative reference
IEC 60044-1
Current instrument
transformers
IEC 61869-1/-2
Instrument transformers
IEC 60529
Degrees of protection provided
by enclosures
ISO 12100
Machine safety – basic
concepts, general principles
of design
EN 50110-1
Operation of electrical
installations
Current instrument transformers are designed,
tested and manufactured in accordance with in-
ternational or national standards, the customer’s
requirements, based on an agreement between
the customer and the manufacturer. The specific
standard is always mentioned on the transformer
ratio nameplate.
As an example the following standards can be
mentioned:
IEC 60044-1; IEC 60044-6; IEC 61869-1;
IEC 61869-2; AS 60044-1; ČSN EN 60044-1;
ČSN EN 60044-6 IEEE Std C57.13.6-2005; ANSI
C57.13-1978; CSA Std CAN3-C13-M83
BS EN 60044-1; GOST 7746-2001
When agreed, transformers made in accordance
with other standards can also be supplied, or in
accordance with other release version of the
above standards.
10. Dimensions
Dimensions of the current transformers acc. ap-
pendix 2.
11. Lifetime
The product’s lifetime is more than 40 years.
