ABB UniSec DY800 Handbuch
Medium voltage products
UniSec DY800 in accordance with Enel specifications
Installation, service and maintenance instructions for 24 kV
prefabricated assemblies with arc-proof metal enclosures and
multi-function apparatus
For your safety! 3
1. Packing and transport 4
2. Checking on receipt 5
3. Storage 6
4. Handling 7
5. Description 8
5.1 Rating and overall dimensions 8
5.2 Construction characteristics 10
5.3 Reference Standards 11
5.4 Interlocks 11
6. Instructions for the operating sequence of all
UniSec DY800 cubicles 13
7. Voltage and phase correspondence indicator 14
7.1 Voltage indicator 14
7.2 Phase correspondence check 14
8. Installation 15
8.1 General information 15
8.2 Normal installation conditions 15
8.3 Installation room 15
8.4 Fumes overpressure exhaust stack 17
8.5 Foundations and fixing bed 18
8.6 Joining and fastening the cubicles 18
8.7 Connections 21
9. Cable tests 23
10. Putting into service 24
11. Routine inspections 26
11.1 General information 26
11.2 Inspection schedule 26
3
Responsible behaviour safeguards your own and
others’ safety! Please consult us if further details if
required.
For your safety!
Foreword
The instructions in this manual refer to UniSec standardized
MV switchgear.
Please read the manual carefully to ensure that the product is
used correctly.
Besides this manual, it is always necessary to consult the latest
technical documentation (electric circuit and wiring diagrams,
tables with overall dimensions, foundation project, etc.),
especially regarding any variants requested in relation to the
standard configurations.
Only use original spare parts for maintenance operations.
• Make sure that the installation room (spaces, divisions and
ambient) is suitable for the electrical apparatus.
• Check that all the installation, putting into service and main-
tenance operations are carried out by qualified personnel
with suitable knowledge of the apparatus.
• Make sure that all the installation, service and maintenance
operations comply with the standards and laws so as to
ensure that the installations are constructed in accordance
with the rules of good workmanship and safety in the work
place. The personnel who access the switchgear must
possess PES or PEI qualification in accordance with IEC
EN50110 standards.
• Strictly comply with the indications in this instruction manual.
• Check that the rated performance of the apparatus is not
exceeded during service.
• Pay special attention to the notes indicated in the manual by
the following symbol:
• Check that the personnel operating the apparatus have
this instruction manual to hand as well as the necessary
information for correct intervention.
4
Strictly comply with the pictograms and
instructions on the packs.
The cubicles are packed in accordance with the instructions in
technical specification Enel DY 1135.
Each cubicle is protected by a plastic cover to prevent water
from infiltrating if it rains when the loading and unloading
operations are performed and to keep the dust off during
storage.
The cubicles are placed on wooden pallets and fixed in place
with four bolts, one per corner.
The loading platform of the vehicle that transports the cubicles
must be no more than 1.5 m from the ground so that the overall
height is 4 m maximum.
The loading platform must have a non-slip surface with a high
coefficient of friction.
The assemblies must be arranged cross-wise and back to back
on the platform with suitable material in between them so as to
prevent them from touching and pressing against each other.
Frame members must be arranged on the platform so as to
space out the units and prevent them from shifting in either the
longitidunal or cross-wise directions.
The units must be fastened to the structure of the vehicle with
ropes so as to avoid damage and prevent them from tipping
over when the transport vehicle is driven round bends or is
sharply braked.
The vehicle must also be covered with a tarpaulin.
1. Packing and transport
5
The cubicles must be unloaded from the transport vehicle with
the utmost care, as described in chap. 4.
Upon receipt, immediately check the condition of the pack, that
the apparatus is undamaged and that the data on the name-
plate (see figure) correspond to the information in the order
confirmation and shipping note.
If damage or discrepancies are discovered, immediately inform
ABB (either directly, or through your representative or supplier)
and the haulage contractor that delivered the goods.
The cubicles are supplied solely with the accessories specified
at the time of order and validated in the order confirmation.
The following items are to be found inside the cubicles:
– this instruction manual;
– a packet containing screws, nuts and busbar washers, etc.
for joining the cubicles;
– the shipping documents.
Example of the name plate affixed outside the pack
ABB PT S.p.A.
U.O. Sace
24 kV MV LINE
CUBICLE
TYPE UniSec ICS/1
ENEL Serial No.
162410
2. Checking on receipt
6
3. Storage
UniSec switchgear must be stored in a dry, dust-free place with
a non-corrosive atmosphere at a temperature between –25 °C
and +70 °C, with 95% relative humidity or less and without
condensation.
Please consult us if different requirements are involved.
7
> 1000
4. Handling
UniSec switchgear is normally placed on a wooden pallet and
fastened with four bolts, one per corner.
For handling purposes, the switchgear can be lifted by a crane
using ropes with snap hooks conforming to the safety stand-
ards, inserted through the eyebolts on the top of the units, or
with a fork lift truck. In this case, the forks must be inserted at
the sides where the cubicle is joined, for improved stability dur-
ing the handling operations.
• Make sure that the insulating parts of the
apparatus are not damaged when the cu-
bicles are handled.
• Before proceeding with any operation,
always make sure that the springs of the
operating mechanism are not loaded and
that the apparatus is in the open position.
• Keep the cubicles in the vertical position
when using a lift truck for handling pur-
poses.
Handling with a lift truck
Lifting with a crane
8
5. Description
5.1 Rating and overall dimensions
Cubicle
Maximum insulation voltage 24 kV
Rated insulation level, withstand voltage:
with lightning impulse to earth and and line-to-line 125 kV
with power-frequency to earth and and line-to-line 50 kV
with power-frequency between the open contacts of the disconnector 60 kV
Rated frequency 50 Hz
Continuous duty rated current for the busbars 630 A
Admissible short-time withstand current for the busbars and branch lines 16 kA
Admissible short-time peak current value for the busbars and branch lines 40 kA
Rated short-circuit time 1 s
External protection class IP3X
Internal arc withstand value:
IAC classification AF DY800/116/316 – AFL DY800/216
test voltage 24 kV
test current 16 kA
test duration 0.5 s
Multi-function apparatus type HySec –Integrated circuit-breaker
Rated voltage 24 kV
Rated insulation level, withstand voltage
Rated lightning impulse withstand voltage 125 kV
Rated frequency 50 Hz
Rated thermal current 630 A
Admissible rated short-time withstand current 16 kA
Electrical life class (ref. IEC 62271-100) E2
Admissible short-time peak current value 40 kA
Rated short-circuit time 1 s
Rated short-circuit breaking capacity 16 kA
Rated operating sequence O - 0.3 sec - CO - 30 sec - CO
Mechanical life 10000 operations Class M2
Rated breaking current values:
circuit mainly active 630 A
vacuum transformer 6.3 A
no-load line 10 A
no-load cable 16 A
capacitor bank 400 A class C2
Integrated three-position disconnector –Line Side
Rated insulation level, withstand voltage
Rated lightning impulse withstand voltage 125 kV
with impulse between the open contacts of the disconnector 145 kV
Rated current 630 A
Admissible rated short-time withstand current 16 kA
Rated short-time peak current 16 kA
Admissible rated short-circuit time 1 s
Mechanical life 1000 operations Class M0
Electrical life class (ref. IEC 62271-102) E0
Integrated three-position disconnector – Earth Side
Admissible rated short-time withstand current 16 kA
Rated short-time peak current 40 kA
Rated short-circuit making capacity 40 kA
Admissible rated short-circuit time 1 s
Mechanical life 1000 operations Class M0
Electrical life class (ref. IEC 62271-102) E1
UniSec switchgear must be stored in a dry, dust-free place
with a non-corrosive atmosphere at a temperature between
–25 °C and +70 °C, with 95% relative humidity or less and
without condensation.
Please consult us if different requirements are involved.
9
A
C
B
A
C
B
UniSec DY800/116 UniSec DY800/216
A
B
C
UniSec DY800/316
Overall dimensions
Dimensions (mm) Weights
(Kg)
A B C D
UniSec DY800/116 500 1850 1050 145 330
UniSec DY800/216 500 2250 1050 145 380
UniSec DY800/316 700 1950 1150 50 375
10
5.2 Construction characteristics
5.2.1 Cubicles
UniSec DY800 switchgear is internal arc-proof and suitable for
secondary distribution requirements.
UniSec DY800 switchgear uses a multi-function apparatus with
vacuum circuit-breaker and SF6insulated 3-position discon-
nector (line, isolated and earth).
The new integrated apparatus is made of two materials: the
top part, where the vacuum interrupters are housed, is made
of epoxy resin so as to guarantee the required degree of insula-
tion while the bottom part is in steel, thereby providing metal-
lic segregation and earthing between the busbar compartment
and cable compartment. This guarantees maximum safety for
the operators when work is performed in the line compartment,
even when the main busbars are energized.
Thanks to this technical solution, panel classification is LSC2A-
PM, in accordance with IEC 62271-200.
All the live parts of the integrated apparatus are SF6insulat-
ed and this guarantees a higher level of protection over time
against strongly aggressive outdoor environments.
The new technology featured by the integrated apparatus pos-
sesses the following advantages:
− it is the only disconnector apparatus with 3 positions and
circuit-breaker
− small size
− low amount of SF6used for insulation
− ease of use.
All the cubicles are internal arc-proof in accordance with the
provisions established by standard IEC 62271-200. The IAC
classification of the various types, restricted to authorized per-
sons alone (class A), complies with the 5 criteria established by
the standard. The 3 types of UniSec DY800 cubicles are clas-
sified in the following way:
− AF on the front side for UniSec units DY800/1 and DY800/3
− AFL on the front side and on the two sides for UniSec
DY800/2 units.
1 External taper bushings (only for
DY800/2)
2 Lifting bolts
3 Opening for gauging temperature
in busbar compartment
(Thermovision)
4 Fixing plate for troubleshooting
apparatus (RG)
5 Circuit-breaker and disconnector
control box
6 Cubicle rating plate
7 Tag holder
8 MV cable inspection window
9 Opening for gauging temperature in
cable compartment (Thermovision)
10 MV door opening handle
11 MV cable test panel
12 Grounding busbar
13 Lower structure for MV cable side
outlet (only for DY800/2)
The internal arc-proof characteristic is guaranteed with the panels
assembled, the doors closed and the screws tightened
5.2.2 Protection classes
UniSec switchgear is generally supplied with the following pro-
tection classes:
− IP2X protection class inside the switchgear with the door
open
− IP3X protection class for the external enclosure.
5.2.3 Main components
All three UniSec DY800 cubicles use the same, previously
described, multi-function apparatus comprising the following
functional components:
5.2.3.1 3-position disconnector (line, isolated, earth)
It is an SF6insulated disconnector; in the open position, the
moving contacts guarantee that the isolated position is main-
tained.
In the line closed position, the moving contacts fit into the fixed
upper contacts installed in the lower part of the circuit-break-
er’s vacuum interrupter.
In the closed earthed position, the moving contacts fit into the
fixed lower contacts in the metal structure.
5.2.4 Characteristic of the 3-position disconnector
operating mechanism
The disconnector is equipped with a three-position stored
energy operating mechanism operated by a dedicated lever.
5.2.5 Characteristics of the circuit-breaker operating
mechanism
The circuit-breaker is equipped with a three-pole operating
mechanism with the following circuits and devices:
− a three-pole voltage start-up closing circuit;
− a three-pole voltage start-up opening circuit;
− an anti-pumping device to prevent further closings other
than the first when opening occurs during the initial closing
request. This device must not be deactivated by functional
inhibitions.
1 Vacuum interrupter
2 Fixed contact of feeder disconnector SL
3 Moving contact of disconnector
4 Fixed contact of earthing switch ST
Andere Handbücher für UniSec DY800
1
Dieses Handbuch passt für folgende Modelle
3
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