5
Text example
Remark
Project
number
2410005671
1 x / Phase on the
first outlet wire only
(1S1) 2410005671,
100, 10, T1,
1VLT5715001663
Position
100
Bay
B10
Transformer
designation
T1
Serial number
1VLT5715001663
Pin
designation
X1
each outlet wire
X1R., 1S1
Phase
designation
R
Standard
designation
1S1
The parameter about the project number / posi-
tion / bay and transformer designation according
to order documents. The parameter about the pin
designation / phase of designation and standard
designation according to switching documents
(wiring diagram).
4. Instructions for use
Current instrument transformers are used:
• to convert currents in the primary circuit to an
appropriate level for secondary circuit equip-
ment (relays and meters)
• to insulate primary and secondary circuit from
each other to protect the secondary equipment
from the harmful effects of current appearing
during the operation (short circuits)
The use of current transformer for purpose other
than described above is forbidden if not agreed
with the producer.
Routine test report
The routine test report of a current instrument
transformer includes:
a) veritication of terminal markings
b) inter-turn overvoltage test
c) determination of errors
d) power-frequency test
Upon the customer’s request the following infor-
mations can be provided free of charge:
• theoretical current/voltage error and phase dis-
placement values
• theoretical excitation (magnetization) curves
Additional reports for supplementary charge,
made available on request:
• test report on accuracy
• excitation (magnetization) curves
• additional nameplates (if more than 1 is re-
quired)
• verification tests for measuring cores (classes
0.2; 0.2S; 0.5; 0.5S)
5. Maintenance instructions
before installation
The current transformers are delivered packed in
foil unit, protected from dust and ambient humid-
ity. The foil unit keeps transformer clean for in-
stallation into SF6 compartment. Any dust sedi-
ments or any other type of contamination has to
be removed from the transformer using a soft
brush and alcohol, in a way not to damage the in-
sulation or cables taken out from the transformer.
Protect surface inside of tube during manipula-
tion with a transformer. Surface inside of tube of
flange must be smooth without sharp edges and
coarse defects.
6. Transport & Storage
The permitted temperature for transport and
storage ranges from -30°C to +60°C. During
transport and storage the transformers have to
be protected from direct impact of solar radia-
tion. The transformers are delivered fixed on
transport palletsin wooden crates.
7. Disposal
Materials used in instrument transformers are
considered as materials without environmental
impact and the materials are not toxic. Instru-
ment transformers have to be disposed in accor-
dance with national legislation relevant to do-
mestic waste disposal.
