6
Remarks
• The IP class is in the form of IPXX, where XX is two Arabic numerals, the first number indicates the level of contact protection and foreign object protection,
and the second number indicates the level of waterproofing protection (the greater the number, the higher the class).
• Environment
Class E0 : There is condensation on the transformer, the contamination is ignored. Suitable for clean and dry indoor installation.
Class E1: There is condensation on the transformer occasionally and the contamination is limited.
Class E2: Frequent condensation and severe contamination, or both.
• Climatic
Class C1: Suitable for transformers operating at temperatures not less than-5 ºC, but exposed to temperatures above-25 ºC during transportation and storage.
Class C2: Suitable for transformers operating, transporting and storing in environment above-25 ºC.
• Fair behavior
Class F0: Combustion performance is not specified except for the inherent characteristics of the transformer. No special fire protection measures have been
taken. However, the escape of toxic substances and opaque fumes should be minimized.
Class F1: Transformers are suitable for fire hazards and require limited combustion. The escape of toxic substances and opaque fumes should be minimized.
Remarks:
The technical parameters in this picture are standard parameters and do not cover all types of transformers.
Introduction to technical
parameters:
1
Manufacturer
2
Siemens brand
3
National Standard GB1094.11-2007
International Standard IEC60076-
11:2004
4
Transformer name
5
Type :
Take SCLB11-2500/10 as an example.
S
-- Three-phase
C
-- Cast-resin
L
-- Aluminum product
B
-- Foil winding
11
-- Performance level code
2500 -- Rated capacity
10
-- Voltage level
6
Serial No.: Product No.
7
Rated voltage at high voltage side
(2x
±
2.5%
）
8
Rated voltage of low voltage side
9
Drawing No.: Product drawing No.
10
Frequency: Rated frequency
11
Connection group symbol:
D -- Delta connections
Y -- Star connections
N -- Neutral
12
Thermal class: Thermal class of
insulation material:
Y, A, E, B, F, H, C
13
Type of cooling:
AN -- Natural air cooling
AF -- forced air cooling
14
Protection class (IP class)
15
Rated current:
Rated current for long-term passage
1
2
3
4
5
7
15
16
19
20
21
8
9
10
11
12
13
14
17
18
6
16
Insulation level:
LI75
-- Rated lightning impulse
withstand voltage
AC28/AC -- Rated withstand voltage
17
Impedance voltage: Impedance voltage,
also known as short circuit voltage,
represents the voltage loss (percentage)
on the transformer's impedance when
the rated current passes
18
Weight: Design weight of transformer
body kg
19
Manufacture date: Year of manufacture
20
Environment /climatic/fire behavior
classes
21
Manufacturer: Siemens Transformer
(Guangzhou) Co., Ltd.
4. Product Structure