IG-049-EN version 02; 02/10/2017
7
General Instructions
ormaset
Kiosk-type prefabricated transformer substation
Main components
The
ormaset
enclosure consists of a concrete body with
access doors and metallic ventilations. It has three separate
compartments used for housing the following electrical
equipment:
1.
Medium voltage functions, with independent access.
2.
Transformer, accessible through the low voltage
compartment.
3.
Low voltage boards, with independent access.
The three compartments can be accessed through the two
independent accesses with double-leaf metallic doors,
which in their open positions are set at 90º or 180º.
The four-slope arrangement of the roof prevents water
from accumulating on it.
If it is necessary to replace part of the electrical equipment
housed inside
ormaset
, the roof has four embedded nuts
for installing four M20 hoisting eyebolts, which allow using
a crane for handling the roof.
3.2. Electrical equipment
The electrical equipment is located inside and anchored to
the enclosure, which can house the following elements:
• Ormazabal
's
cgmcosmos
(24 kV) or
cgm
.3 (36 kV)
medium voltage switchgear unit with full SF
6
gas
insulation allows maximum configurations of:
- 3L1P for the 24 kV series (3 feeder functions and 1
fuse protection function).
- 2L1P for the 36 kV series (2 feeder functions and 1
fuse protection function).
• Oil-filled medium voltage/low voltage distribution
transformer unit with rated power of 1000 kVA and
36 kVA. It has natural ventilation, in accordance with
standard EN 60076 and is equipped with medium
voltage plug-in terminals.
• Low voltage switchgear:
- AC-4 type switchboard, specifically built for
ormaset
.
- AM-4 type switchboard, specifically built for
ormaset
.
• Medium voltage interconnections using plug-in
terminals and low voltage interconnections direct by
cable.
The maximum possible configurations for 24 kV and 36 kV
are listed below, allowing other diagrams with fewer
medium voltage functional units and/or low voltage
switchboards:
Up to 24 kV
MV
3L1P
LVB
AC4 + AM4
Transformer
≤1000 kVA
Up to 36 kV
MV
2L1P
LVB
AC4 + AM4
Transformer
≤1000 kVA
Figure 3.2.
Detail of maximum configuration single-wire diagrams
for 24 kV and 36 kV
Summary of Contents for Ormazabal ormaset
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