GENERAL INSTRUCTIONS FOR CTC
UNDER POLE COMPACT
TRANSFORMER SUBSTATION
IG-086-GB
version 02
11.07.2007
Page 5 of 20
1.1. PREFABRICATED ENCLOSURE
It consists of:
•
Concrete monoblock prefabricated construction with IP339 rating, complying with the
UNE 20 324 standard.
•
Removable
cover.
•
One front access door to the Low Voltage Board (LVB) with dimensions of
975 x 970 mm. The one leaf access door is provided with a system that allows to fix it
at 90º and avoids accidental closing. There is a physical barrier from the LVB access
area to the transformer access area.
•
Two side doors with dimensions of 982 x 1320 mm that allow access to the
transformer area. Both doors can be unlocked from the LVB compartment.
•
Two side grilles over
each of the transformer access doors, for air intake / exhaust,
allowing optimal ventilation. They are provided with a mosquito netting of 6 mm
maximum mesh.
•
Two cable access areas, one for MV cable incoming, with dimensions of
400 x 190 mm, at the
CTC
TS
back bottom and another one for LV cable outgoing,
with dimensions of 440 x 190 mm, at the front bottom.
•
Dielectric liquid collecting pit with a capacity of 400 l.
•
Electrical warning plate.
1.2. TRANSFORMER
•
Transformer up to 250 kVA, 36 kV
[1]
series.
1.3. LOW VOLTAGE BOARD
The
CTC
Transformer Substation can be supplied with the Low Voltage Board (LVB)
installed at the factory.
The LVB consists of a metal frame that supports the protection functional unit, which is made
up of vertical fuse holder bases BTVC. The busbar functional unit, made up of horizontal
bars, is fixed on these bases. To identify the horizontal bars different colours are used.
[1]
This functional unit is included in the
CTC
TS only upon request.
