Medium voltage switchgears for secondary distribution ()

Medium voltage switchgears for secondary distribution ()
MEDIUM VOLTAGE SWITCHGEAR
for secondary distribution
CATALOGUE
Code: P2490_xx
CONTENTS
1
About us
2
Medium Voltage Business Unit Portfolio
3
Overview
8
Medium Voltage Switchgear Types. Equipment used.
13
Technical features
14
Switchgear description
21
Switchgear Designs
25
Safety and user protection
26
Packaging
27
Storage, unpacking, assembly and installation
32
Benefits of P2490_xx Switchgear Range
32
Services provided for the product range
About us
Electroalfa is one of the Romanian market leaders on the fields
of electrical equipment manufacturing, stell fabricated parts and
EPC contracting, withe more than 23 years of experience.
Electroalfa today:
Our products and services portfolio includes the following:
3 factories in Botosani
Low and Medium Voltage Products
Production facilities and sales
representatives in Romania
Steel Fabricated Parts
Turnkey Projects
New R&D Center
Renewable Energy Production
A turnover around 35.5 million euro in 2013
A strong brand, based on high experience,
qualifications and enthusiasm of 380
professionals
For developing the most reliable products and being connected to the latest
technologies, we implemented and keep up to date an integrated quality
management system audited and certified by SRAC CERT.
Quality Management Systems
Certification SR EN ISO
9001:2008
Environmental Management
Systems Certification SR EN
ISO 14001:2005
Occupational Health and
Safety Management
Systems Certification OHSAS
18001:2007
About us
1
Medium Voltage Products
Electroalfa holds a portfolio of primary, secondary distribution
switchgear and transformer substations, product of highly
complexity and high added value.
All these are the result of two decades of research and
development in its own departments as confirmed by
independent laboratories.
The high functionality and the level
of safety for the equipment during
service are attributes that have
positioned on top our medium voltage
products by major customers in the
market.
Both the primary distribution and the
secondary distribution switchgear
are the products manufactured under
own Electroalfa solutions. These can
encompass a wide range of equipment
and are tested in independent
laboratories to ensure reliability and
durability.
2
Medium Voltage Business Unit Portfolio
Overview
24KV/ 630A/ 20KA Medium Voltage Switchgear of P24xx range,
manufactured by Electroalfa, are tested switchgear, built to be
used in secondary distribution systems for medium voltage as
follows Rated Voltage up to 24 kV, Rated Current up to 630 A
Max. Short time Current up to 20 kA.
Applications
LV/MV transformer substations,
compact transformer substations or
transformer substations in erected
buildings,
Power Supply for buildings such
as residential areas, hospitals,
office buildings, stadia, airports,
supermarkets, industrial facilities, etc.
Junction points .
Photovoltaic and
Wind Power Plants.
Overview
3
The P2490_xx range includes
switchgear for all the LV/MV
substations and for industrial
secondary distribution functions.
P2490_1
P2490_2
line switchgear with SF6-Insulated Load
Break Switch Disconnector
transformer switchgear with
SF6-Insulated Load Break Switch
Disconnector and HRC fuses
P2490_3
P2490_4
P2490_5
metering switchgear with SF6-Insulated
Load Break Switch Disconnector, voltage
metering transformers, HRC fuse
protected
coupling switchgear with SF6-Insulated
Load Break Switch Disconnector
busbar connection switchgear
P2490_6
P2490_7
P2490_8
metering switchgear with current and
voltage metering transformers
switchgear with SF6-Insulated Load
Break Switch Disconnector, vacuum
Circuit Breaker and microprocessor
protection block
connection switchgear for connecting the
power cable directly to the main busbar
P2490_9
P2490_10
IST internal services transformer
switchgear, SF6-Insulated Load Break
Switch Disconnector powered, HRC fuse
protected
metering switchgear with SF6-Insulated
Load Break Switch Disconnector, current
metering transformers, and voltage
metering transformers
4
Overview
The P2490_xx range switchgear are
for indoor use, metal clad, with simple
extensible busbar system.
Standards
The switchgear panels are designed
and tested in accordance with the
following European standards:
• SR EN 62271-200:2004
High-voltage switchgear and
controlgear AC metal-enclosed
switchgear. Part 200: AC metalenclosed switchgear for rated
voltages above 1kV and up to and
including 52kV .
• SR EN 62271-1:2009
High-voltage Switchgear And
Controlgear - Part 1: Common
Specifications.
• SR EN 62271-102:2007
High-voltage switchgear and
controlgear – Part 102: Alternating
current disconnectors and earthing
switches.
Quality Control System
During all the phases of
implementation of all its products, and
hence the medium voltage switchgear
panel as well, starting from the design,
procurement assessment, supply,
manufacture, flows and final tests and
checks Electroalfa has implemented
and maintains a system of
Integrated Management System that
meets the reference standards
of SR EN ISO9001:2008, SR EN
ISO14001:2005, OHSAS 18001:2007,
ISO / IEC 27001:2005 and SA
8000:2008, system evaluated and
certified by the awarding bodies SRAC
CERT Bucharest and IQNet.
This provides our customers the
guarantee of suitable products with a
high and constant quality level.
Overview
5
Type Tests
The Switchgear were type tested with
fully satisfactory results at ICMET
Craiova Laboratories.
6
Overview
Climate and ambient conditions
Location
indoors
Climate Group
WDr/CT (moderate: warm dry/ cold /temperate)
Maximum environment temperature, during use
+40°C
Maximum average temperature for 24 hours, during use
+35°C
Minimum environment temperature, during use
-5°C
Temperature during transport and storage
-25°C… +70°C
Humidity during use
Daily average value
maximum 95%
Monthly average value
maximum 90%
The average daily atmospheric vapor pressure
maximum 2,2kPa
The average monthly atmospheric vapor pressure
maximum 1,8kPa
Maximum altitude
1.000 m
The environment must be free of dust, no corrosive or flammable gases, vapors or salt beyond established by current
regulations for indoors electrical installations. For different values to the above consult the manufacturer.
Overview
7
Medium Voltage Switchgear Types:
Equipment used.
P2490_1 Line switchgear with SF6-Insulated
Load Break Switch Disconnector
P2490_2 Transformer switchgear with SF6Insulated Load Break Switch Disconnector and
HRC fuses
Basic Equipment
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
Basic Equipment
Type K operating mechanism
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
Voltage presence indicator
Type A operating mechanism
SF6 pressure indicator
HRC fuses socket
Three-phase main busbar system
Earthing Circuit below and above the fuses
Cables connection terminals
Voltage presence indicator
Mechanical interlocks
SF6 pressure indicator
Heating resistance
Three-phase main busbar system
Optional
Cables connection terminals
On/ Off Disconnector Actuator
Mechanical interlocks
Auxiliary contacts for switch disconnector and earthing
connection
Heating resistance
Auxiliary contacts for Voltage presence indicator
Fault Indicator
Phases sequence checking device
Optional
On/ Off Disconnector Actuator
Opening coil for the disconnector
Enlarged LV compartment
Auxiliary contacts for switch disconnector and earthing
connection
Front and side protective covers
Auxiliary contacts for Voltage presence indicator
Cable terminal ends
MV Fuses
Enlarged LV compartment
Front and side protective covers
Cable terminal ends
8
Medium Voltage Switchgear Types. Equipment used.
P2490_3 Metering switchgear with SF6Insulated Load Break Switch Disconnector,
voltage metering transformers, HRC fuse
protected
Basic Equipment
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
Type A operating mechanism
HRC fuses socket
P2490_4 Coupling switchgear with SF6Insulated Load Break Switch Disconnector
Basic Equipment
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
Type K operating mechanism
Voltage presence indicator
SF6 pressure indicator
Earthing Circuit below and above the fuses
Three-phase main busbar system incoming/ outgoing,
left/ right
SF6 pressure indicator
Mechanical interlocks
Voltage metering transformers
Heating resistance
Three-phase main busbar system
Optional
Mechanical interlocks
On/ Off Disconnector Actuator
Heating resistance
Auxiliary contacts for switch disconnector and earthing
connection
Optional
On/ Off Disconnector Actuator
Opening coil for the disconnector
Auxiliary contacts for switch disconnector and earthing
connection
Auxiliary contacts for Voltage presence indicator
Phases sequence checking device
Enlarged LV compartment
Front protective covers
Voltmeters
Voltage presence indicator
Auxiliary contacts for Voltage presence indicator
MV Fuses
Enlarged LV compartment
Front and side protective covers
Medium Voltage Switchgear Types. Equipment used.
9
P2490_5 Busbar connection switchgear
P2490_6 Connection switchgear for connecting
the power cable directly to the main busbar
Basic Equipment
Three-phase main busbar system incoming/ outgoing,
left/ right
Optional
Voltage presence indicator
Auxiliary contacts for Voltage presence indicator
Phases sequence checking device
Heating resistance
Front protective covers
Basic Equipment
Three-phase main busbar system
Voltage presence indicator
Heating resistance
Cables connection terminals
Optional
Auxiliary contacts for Voltage presence indicator
Fault Indicator
Phases sequence checking device
Enlarged LV compartment
Front and side protective covers
Cable terminal ends
10
Medium Voltage Switchgear Types. Equipment used.
P2490_7 Metering switchgear with current and
voltage metering transformers
P2490_8 Switchgear with SF6-Insulated Load
Break Switch Disconnector and vacuum Circuit
Breaker
Basic Equipment
Current metering transformers
Basic Equipment
Voltage metering transformers complete with HRC fuses
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing.
Three-phase main busbar system
Heating resistance
Optional
Voltage presence indicator
Auxiliary contacts for Voltage presence indicator
Voltmeters
Phases sequence checking device
Enlarged LV compartment
Front protective covers
Disconnector operation mechanism (Type A)
SF6 pressure indicator for the switch disconnector
Vacuum Circuit Breaker
Circuit Breaker operation mechanism
Three-phase main busbar system
Cables connection terminals
Earthing Circuit on Cable terminals
Voltage presence indicator
Mechanical interlocks
Heating resistance
Optional
On/ Off Disconnector Actuator
Circuit Breaker On/ Off switching motor
Auxiliary contacts for switch disconnector, circuit breaker
and earthing circuit
Auxiliary contacts for Voltage presence indicator
Current metering transformers
Digital protection relay
Phases sequence checking device
Enlarged LV compartment
Front and side protective covers
Cable terminal ends
Medium Voltage Switchgear Types. Equipment used.
11
P2490_9 IST internal services transformer
switchgear, SF6-Insulated Load Break Switch
Disconnector powered, HRC fuse protected
P2490_10 Metering switchgear with SF6Insulated Load Break Switch Disconnector,
current metering transformers, and voltage
metering transformers
Basic Equipment
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
Basic Equipment
Type A operating mechanism
SF6 Load Break Switch Disconnector with three positions
: on/ off/ earthing;
HRC fuses socket
Type K operating mechanism and SF6 pressure indicator
Earthing Circuit below and above the fuses
Current metering transformers
SF6 pressure indicator
Voltage metering transformers complete with HRC fusees
Internal services transformer
Three-phase main busbar system
Three-phase main busbar system
Heating resistance
Mechanical interlocks
Optional
Heating resistance
On/ Off Disconnector Actuator
Optional
Auxiliary contacts for switch disconnector and earthing
connection
On/ Off Disconnector Actuator
Opening coil for the disconnector
Voltage presence indicator
Auxiliary contacts for Voltage presence indicator;
Auxiliary contacts for switch disconnector and earthing
connection
Voltmeters
Voltmeters
Phases sequence checking device
Voltage presence indicator
Enlarged LV compartment
Auxiliary contacts for Voltage presence indicator
Front protective covers
MV Fuses
Enlarged LV compartment
Front and side protective covers
12
Medium Voltage Switchgear Types. Equipment used.
Technical Features
Nr.
Feature
U.M.
Value
1
Rated voltage – Ur
kV
24
2
Lightning impulse withstand rated voltage (phase to earth,
phase to phase) – Up
kV
125
3
Lightning impulse withstand rated voltage (across isolating
distance) – Up
kV
145
4
Industrial frequency withstand rated voltage,
50 Hz – Ud
kV
50
5
Industrial frequency withstand rated voltage for the
separation distance, 50 Hz – Ud
kV
60
6
Rated current– Ir
Main busbars
A
630
Switch disconnector
A
630
7
Breaking current – I1
A
630
8
Rated admissible short-time current-– Ik
KAef/1 s
20
9
Rated admissible peak current- – Ip
kAmax
50
10
Rated frequency
Hz
50
11
Arc resistance, front and side (switchgear equipped with
protective frontal covers or enlarged LV compartment and
protective upper side covers)
KA/sec
IAC AFL 16KA/1 s
12
Overall Dimensions
Width
mm
500 ÷1.000 (according to the design)
Depth
mm
985
Height
mm
1.600 (without secondary circuits panel)
2.000 (with secondary circuits panel)
13
14
Protection degree:
In operating position, with all doors and panels closed
IP 3X
Between adjacent interior compartments
IP 20
Main circuits busbar insulation
Shrinkable tube, terminals and air protection
Technical features
13
Switchgear description
The panels are designed to be used in the in secondary
distribution to supply electricity, from the client’s medium
voltage network, directly from the National Energy System
(NES) for transformer substations or distribution in industrial
units, by power stations located in the main usage points
The panels are modular and
metal enclosed, with compartments
and fitted with fixed equipment. The
equipment type allows a compact
design with small dimensions.
The medium voltage switchgear
panels consist of a metal housing
made of sheet metal panels
assembled with special rivets,
fasteners and point welding, ,
which accommodate the medium
voltage equipment according to
the operation requirements and the
metering, command, signalling and
protection low voltage equipment
The removable panels or the ones
which provide access to live parts
of the switchgear are provided with
warning signs: “Warning! High
Voltage! Electrocution Hazard!”.
14
Switchgear description
The switchgear enclosures are
provided with the following
compartments:
The all-purpose Busbar
Compartment
This section is the GSC-24 indoor
switch disconnector itself, sealed
inside the insulating resin
housing.
The Load Break Switch
Disconnector Compartment
Secondary Circuits and Operation
Mechanism
The enclosure material
provides good insulation features
and resistance to moisture and
atmospheric contaminants.
The insulating housing consists of
upper shell and lower shell, tightly
closed and the interior is filled with
SF6 gas at a pressure of 0.4 bar
minimum. The GSC-24 indoors
medium voltage switch disconnector
can be set in one of the following
positions: „closed”, „open”, „earthed”.
Connection Compartment
The all-purpose busbar compartment
is located at the top, at the rear
and includes the all-purpose
busbar placed on the load switch
disconnector terminals with
insulating shrink tube and silicone
insulation in areas of contact
with the upper terminals of the
disconnector.
It is separated from the secondary
circuit compartment by a metal
panel and from the by the cable
connection lower compartment
through the disconnector’s housing.
Access within this section is not
allowed in normal operation of other
substation panels.
to the earthing busbar by means of a
special provided screw.
The connection compartment is
situated at the lower side of the
enclosure and may include, depending
on panel type: the lower terminals
of the switch disconnector, the
capacitive voltage dividers and the
cable terminals. For the fused switch
disconnector panels, the fuses
are situated in this compartment
alongside the earthing disconnector
below the HRC fuses..
The compartment is metal enclosed
fixed with special rivets and
screws. Access to this section shall
be realised only if the earthing
disconnector is closed by opening
the compartment’s door. The medium
voltage connections are done via
single phase conductors enabling the
cable terminal. For shielded cables
is possible to link the shielding wire
The Secondary circuit compartment
is located in the front top part of
the panel and is accessible in normal
operation of the station. For secondary
circuits of low complexity, they are
partially located in the mechanism’s
sector, but also in two adjacent
sectors, each protected by metal
or plastic plates, easily accessible
and that can be opened with a tool.
For secondary circuits of higher
complexity the enclosure can be
provided with an additional circuit
panel fitted above the enclosure,
in line with the front panel. The
additional secondary circuits panel is
provided with side access door, that
can be handled by hand, which closes
with key and lock. The devices placed
in the secondary circuits panel are
accessible after opening the door. The
switchgear block diagram is placed on
the door of the joint mechanism and
secondary circuits compartment.
.
Switchgear description
15
Load Break Switch Disconnector
GSC-24 with Type K mechanism
GSC-24 is an indoors SF6 disconnector
for 24kV rated voltage, using SF6 for
arc extinguishing medium as well as
for electrical insulation.
GSC-24 is characterized by a small
size, convenient to install and operate,
and which allows good adaptation to
the requirements of integration into
existing installations.
GSC-24 with Type A mechanism
The GSC-24 load break switch
disconnector has the function of
control and protection of the electrical
equipment in power networks and
transformer substations.
The switch disconnector is provided in
two variants:
• with Type K mechanism designed to
equip line switchgear panels;
• with Type A mechanism that equip
the switch disconnector and fuses
combination, designed to protect
and control LV/ MV transformers
power supply in transformer
substations
Each of the two types of mechanisms
can be provided, according to
the customer’s request, manually
operated or motorized and manually
operated.
GSC-24 is manufactured in accordance
with the following standards: IEC
62271-1, IEC 60265-1, IEC 62271-105,
IEC 62271-102 and GB 3804.
The shape and dimensions of GSC-24 switch disconnector
Legend:
A. lower terminal, M10x22, maximum
torque 35Nm;
C. hexagon 24, for the main lower side
connection;
D. main upper side connection;
E. contact surface for the upper
terminal;
F. upper terminal, M8x30, maximum
torque 28Nm;
G. disconnector terminal, with
earthing role; M8x20 bolts, for fixing
the earthing bar.
16
Switchgear description
Switch Disconnector Main Circuit
Arc extinction
C. Earthing circuit operation (EC)
The main circuit of GSC-24 indoors
switch disconnector is sealed
inside the resin enclosure.
The GSC-24 load break switch
uses SF6 gas as arc extinguisher.
Whilst in on or off position, the
electric arc will spin through the
action of a magnetic field given by a
permanent magnet. Subsequently
the arc will be cooled and
extinguished by SF6 gas.
Closing the EC can be done only
by manual operation, inserting the
handle in entry 1 (Figure 1), rotating
clockwise, the upper cam rotates,
compresses the spring, which
accumulates energy.
The enclosure material provides good
insulation features and resistance
to moisture and atmospheric
contaminants. The insulating
housing consists of upper shell and
lower shell, tightly closed and the
interior is filled with SF6 gas at a
pressure of 0.4 bar.
A safety valve is provided at the
bottom rear of the casing. This is
a protection measure to a fault
situation, where the high pressure,
internal gas can come out through
the safety valve without affecting
the operator or the switchgear.
The GSC-24 switch disconnector can
be configured as per below:
Closed
Operating mechanism and
interlocking functions
There are two types of mechanisms
used for GSC-24:
• The type K, spring operated
mechanism, is used together with
the GSC-24 load switch, for line
switchgear.
• The type A, spring operated
mechanism, is used for the GSC-24
load switch combined with fuses, for
transformer panels.
1. The type K spring operated
mechanism
The operating principle of type K
spring operated mechanism is based
on the compression and release of the
main spring of the mechanism (see
Figure 1, Open Position).
Upon reaching maximum
compression, the continued rotation
of the crank activates the mechanism
that releases the energy of the main
spring and so connecting the mobile
contact on “Earthed” position of the
main circuit.
Opening the EC can be done only
by manual operation, inserting the
handle in entry 1 (Figure 1), rotating
counter clockwise, as per the label
affixed to the front cover of the switch
disconnector.
The type K operating mechanisms
can be motorized, upon request, for
opening/ closing the main circuit
switch disconnector.
These commands can be done
remotely or via buttons placed on the
front of the enclosure.
Open
A. Closing the main circuit
Earthed
GSC-24 load switch operation diagram.
Through operating the handle, entry
2 (Figure 1), clockwise, the lower cam
rotates, compresses the spring, which
accumulates energy.
Upon reaching maximum
compression, the continued rotation
of the crank activates the energy of
the main spring and so connecting the
mobile contact on “Closed” position of
the main circuit.
B. Opening the main circuit
Through operating the handle, entry
2 (Figure 1), counter clockwise, the
energy accumulated in the main spring
is released and the disconnector
switches the main circuit to “Open”
Switchgear description
17
Figure 1. Type K mechanism.
Legend:
A. Cable compartment lower door
interlocking;
B. Mounting points for voltage
presence indicator;
1. Entry for crank operation of the EC;
2. Entry for crank operation of the
switch disconnector;
3. Multifunctional plate;
4. Front plate;
5. Rear plate.
Figure 2. Type K mechanism, motorized .
18
Switchgear description
2. The type A spring operated
mechanism
The operating principle of type A
spring operated mechanism resembles
the type K mechanism, adding the
tripping function after tripping by
the fuse (striker pin tripping). For
the type A operating mechanism,
electromagnetic tripping is also
available, upon customer’s request.
The dimensions and the elements
listed for Type K are valid for Type A,
except those marked in Figure 3.
C. Earthing circuit operation (EC)
The EC operation for the Type A
mechanism is similar to the one for
Type K mechanism.
The type A operating mechanisms
can be motorized, upon request, for
opening/ closing the main circuit
switch disconnector.
These commands can be done
remotely or via buttons placed on the
front of the enclosure.
Warning!
For both mechanisms types K or A,
only when the switch disconnector
is open. one, and only one, of
the following operations can be
performed:
1. Closing the switch disconnector,
manually or electrical, or
2. Closing the cable terminals
earthing circuit, manually.
A. Closing the main circuit
Through operating the handle,
clockwise, the lower lever 1 rotates,
compresses the closing spring
12, and the opening spring 8,
simultaneously in order to provide
the required energy for the closing
operation.
When the lower lever 1 activates the
tripping pin and the lower sliding
wheel and releases the closing spring
causing the closing of the main
circuit..
Figure 3. Type A mechanism
B. Opening the main circuit
To open the main circuit press
the opening red push-button.
Alternatively the fuses tripping pin
or the opening electromagnet can
activate the tripping pin 2. These
operations cause the release of the
appropriate spring and the opening
of the main circuit by the load switch
disconnector..
Figure 4. Type A mechanism, motorized
Switchgear description
19
Operating Mechanism Interlockings
Figure 4. Interlocking mechanisms diagram.
The SF6 insulated GSC-24 type,
indoors medium voltage switch
disconnectors, including the fused
variant are provided with following
interlockings:
A. When the switch disconnector is
closed the earthing circuit cannot
be activated
B. When the earthing circuit is closed,
the switch disconnector in open
position for the main circuit cannot
be operated.
C. Padlock provision for blocking the
main circuit and/ or the earthing
circuit, to prevent forcing the
mechanism.
D. The interlocking between the
position of the switch disconnector
and the lower compartment,
the cables compartment: the
cables compartment cover can be
removed only if the disconnector
is set to “earthed” position.
Decoupling the disconnector
from the “earthed” position and
switching it to the “open” position,
can be done only if it is installed
correctly, with the cables lower
compartment cover in the normal
operating position.
20
Switchgear description
Legend:
X. Earthing Circuit open (front cover
installed);
Y. Earthing Circuit closed (font cover
installed); The difference between X
and Y: 15 mm.
A. Interlocking system.
Objective: providing access to the
medium voltage cables compartment
only when the cable terminals are
earthed.
Switchgear Designs. Dimensions.
P2490_1 Line switchgear with SF6-Insulated Load Break Switch Disconnector
Overall Dimensions
Width: 500 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Cable terminal height: 900 mm
Weight: 195 Kg
P2490_2 Transformer switchgear with SF6-Insulated Load Break Switch Disconnector and HRC fuses
Overall Dimensions
Width: 500 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Cable terminal height: 400 mm
Weight: 210 Kg
P2490_3 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, voltage metering
transformers, HRC fuse protected
Overall Dimensions
Width: 600 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Weight: approximative 300 Kg
(depending on the type of metering
transformers)
Switchgear Designs. Dimensions.
21
P2490_4 Coupling switchgear with SF6-Insulated Load Break Switch Disconnector
Overall Dimensions
Width: 500 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Weight: 200 Kg
P2490_5 Busbar connection switchgear
Overall Dimensions
Width: 500 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Weight: 125 Kg
P2490_6 Connection switchgear for connecting the power cable directly to the main busbar
Overall Dimensions
Width: 500 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Cable terminal height: 800 mm
Weight: 120 Kg
22
Switchgear Designs. Dimensions.
P2490_7 Metering switchgear with current and voltage metering transformers
Overall Dimensions
Width: 700 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Weight: approximative 350 Kg
(depending on the type of metering
transformers)
P2490_8 Switchgear with SF6-Insulated Load Break Switch Disconnector and vacuum Circuit Breaker
Overall Dimensions
Width: 800 mm
Depth: 1.120 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Cable terminal height: 400 mm
Weight: approximative 450 Kg
(depending on the type of metering
transformers)
P2490_9 IST internal services transformer switchgear, SF6-Insulated Load Break Switch Disconnector
powered, HRC fuse protected
Overall Dimensions
Width: 750 mm
Depth: 985 mm
Height: 1.600 mm
Maximum Height with Enlarged LV
compartment: 2.000 mm
Weight: approximative 350 Kg
(depending on the internal services
transformer type)
Switchgear Designs. Dimensions.
23
P2490_10 Metering switchgear with SF6-Insulated Load Break Switch Disconnector, current metering
transformers, and voltage metering transformers
Overall Dimensions
Width: maximum 1.000 mm
(depending on the type of metering
transformers)
Depth: 985 mm
Height: 1.600 mm
Maximum height with Enlarged LV
compartment: 2.000 mm
Weight: approximative 420 kg
(depending on the type of metering
transformers)
24
Switchgear Designs. Dimensions.
Safety and user protection
The Switchgear are environmentally
friendly and do not pose a risk the
life, health and safety of operating
personnel.
• improper manoeuvres – by
Mechanical interlocks and by
appropriate labelling indicating
correct operation and warnings.
This is achieved by the fact that the
products have been designed, built
and tested to protect the operating
personnel against:
It is recommended to follow the
directions on the labels and in the
operating instructions and not try
forcing the mechanisms via other
maneuvers.
• electric shock – by enclosing the
electrical equipment in housing
with protection class IP 3X, use of
protection barriers (screens) and
linking to all conducting inactive
parts (not live) to the protection
circuit;
• internal arc – The switchgear panels
were tested in ICMET Craiova
laboratories on front and side free
arc resistance. The panels provide
internal arc protection to EN 62271
- 200, and are classified IAC: AFL 16
KA 0.5s;
The equipment is provided with
a padlock provision to prevent
forcing the mechanism upon actuating
the earthing circuit and the main
disconnector.
1
After each manual maneuver remove
the operation crank from the entry.
Store the crank on a special support
near the enclosures.
2
Operating mechanical interlocks
The switchgear are equipped with
mechanical interlocks designed
to prevent misuse. Familiarity with
these interlocking is essential before
performing any manoeuvre with
medium voltage switchgear.
1. Ureche pentru blocarea cu lacăt a
acţionării CLP.
The available interlocks are:
• overloads and short circuits – via
appropriate sizing of the electric
circuits and the usage of HRC fuses
or of protection blocks;
• fire hazard – by using fire and heat
resistant materials and by avoiding
the risk of occurrence of sources
generating heat;
• mechanical hazard – by the absence
of sharp tips and edges, of moving
parts that can cause injury, by
providing mechanical rigidity and
sufficient stability of the product;
A. For the Switchgear
The lower cover of the cables
connection compartment can
be only opened whilst the
medium voltage cables earthing
disconnector is closed.
B. For the Switch Disconnectors
The SF6 insulated GSC-24 type,
indoors medium voltage switch
disconnectors, including the fused
combination, are provided with the
following interlockings:
• When the switch disconnector
is closed the earthing circuit
cannot be activated..
2. Ureche pentru blocarea cu lacăt a
acţionării separatorului principal.
• When the earthing circuit is
closed, the switch disconnector
in open position for the main
circuit cannot be operated.
Padlock provision
Safety and user protection
25
Installation
The indoor medium voltage
switchgear are placed on wooden
racks and packaged for land
transportation in shrink wrapped
polyethylene foil, provided with anticondensation slots (for road or rail
freight).
For sea, air shipping or upon
customer’s request the switchgear can
be delivered wooden crated, lined with
corrugated cardboard or polystyrene.
The accessories, accompanying
documents and equipment likely
to be destroyed during
transport are packed separately.
When the switchgear are part of
complex equipment, such as a
compact transformer substation
or a junction point, the enclosures
can be delivered fully installed in the
assembly, unless otherwise agreed
with the client.
Transport
The panels can be moved
by road, rail, air or sea, closed, in
normal operational position, packaged
and secured to avoid any mechanical
damage.
If the transport is made on rough
roads the maximum speed must be
30km/h.
The transport terms and conditions
are agreed with the client prior to
signing the contract. The packaging
requirements depend on these
circumstances.
26
Installation
Delivery
Handling
Equipment settings:
a.Switch Disconnectors in
“Open”position;
b.The blades of the earthing switch
must be in the “Closed” position;
c.Accessories and secondary circuits
devices likely to be damaged in
transport are delivered separately,
packed and kept in the original
packaging;
d.The HRC fuses are delivered in their
original packaging..
The switchgear must be kept in their
original packaging up to the place of
installation.
The handling of the medium
voltage switchgear, regardless of the
packaging method, is done as follows:
• using the forklift truck or the hand
pallet truck – the forks must cover
the whole panel depth;
• using the lifting rings, ordered with
the units and using cables with up to
60˚ opening.
Reception
Upon delivery the switchgear are to be
checked. In case of irregularities
notify the carrier and forward these
observations to the manufacturer.
The complaints about the
delivery are acceptable by
the manufacturer within 3 days of
receipt, provided that the carrier has
been notified as well.
Do not tilt the functional units more
than 15 ˚ to the vertical.
Storage, unpacking, assembly
and installation
The Switchgear must be stored in
original packaging. The storage room
must be protected from factors that
could cause damage, such as water,
steam, salt air, pollutants, micro
organisms, insects, rodents, etc.
It is prohibited to store on the side and
to over stack the enclosures.
Storage temperature must fall in the
-25 to + 70 ° C range.
For the relays and electronic
components of in the switchgear
observe their manufacturers’
instructions, on the storage
temperature range. If necessary, they
should be stored separately, following
storage temperatures indicated by
their manufacturers.
After 12 months storage, qualified
personnel must verify the state of
conservation of the equipment.
Preservation
Unpacking
The medium voltage switchgear
may be stored indoors, in a
well-closed, dry and protected from
external atmospheric factors. Provided
that the conditions above
are respected, the switchgear do not
require special conservation measures.
However, to prevent corrosion,
the mechanisms parts and the
galvanized components are greased
before packaging.
Unpacking the medium voltage
switchgear should follow the below
operations:
• Remove the plastic covers or for the
crated products, the lid and sides of
the crate;
• Remove from site all packaging
materials;
• Remove the wooden pallets as
follows:
• open the bottom lid (respecting
the operational interlocks, if any
earthing circuit is present, it must
be closed);
• unscrew the 4 bolts fastened to
the pallet;
• lift the enclosure, remove the
crossbars and place in the final
position.
To reduce dampness a Silica Gel sachet
is placed in each panel, not to be
removed during storage.
The packaging materials from
products and accessories must be
removed from the operation site,
managed as waste and disposed of
according to environmental
regulations.
Storage, unpacking, assembly and installation
27
Installation
Enclosures positioning: After unpacking, place the enclosures on the final position respecting minimum installation quotas
according to illustrations presented. The final installation position must be horizontal. Before installation check the horizontally
of surface. The cables entry is at bottom, from the cableway placed under the enclosures. The room where the switchgear will be
installed should provide clearance to ceiling of 600 ± 100 mm, insuring internal arc resistance. The distance from the enclosures to
the side walls and at the back to the rear wall should be 100 ± 30 mm.
Front View
Depth View
Top View
28
Storage, unpacking, assembly and installation
Mounting holes as per below drawings:
500 mm width enclosures:
P2490_1; P2490_2; P2490_6
750 mm width enclosures:
P2490_9
600 mm width enclosures:
P2490_3
800 mm width enclosures:
P2490_8
Following securing in place, proceed
to attach the panels between them
by fastening the sides together with
screws.
For the 4 holes marked in the drawing
above use M10x30 screws.
Cables compartment access:
700 mm width enclosures:
P2490_7
1.000 mm width enclosures:
P2490_10
Opening the doors or covers of the
cable connection compartment
is made only whilst the earth
disconnector is in “closed” position.
In this situation the mechanical
interlocks allow to lift and to open
the door or the cable connection
compartment cover
Floor mounting is accomplished using
4 x M10 bolts.
Storage, unpacking, assembly and installation
29
Side and front protective covers, or increased LV compartments installation
For each row of switchgear, a set of
side covers is installed, at the two ends
of the row.
Upon customer’s request the
enclosures will be resistant to internal,
front or the front and side arc. For
these options the switchgear will be
provided with:
• upper front protective covers or
additional LV Switchgear, in the
front. These will be placed above
each enclosure, up to 2 m from the
floor..
• upper side protective covers, on
the sides, at the ends of the row
of enclosures up to 2 m of the side
wall, relative to the floor..
Installation
Optional front protection
cover or increased LV
compartment.
Optional: side protection
cover, on top side.
Environment prerequisites
Environment maximum temperature
+ 40˚C
Environment minimum temperature
+5˚C (ensuring proper cable connections)
Environment average temperature for 24h
maximum + 35˚C
Maximum air relative humidity
maximum 80% la 20˚C
Maximum altitude
1.000 m (for higher altitudes refer to the
manufacturer)
The ambient air must be free of dust, fumes, gases, flammable or corrosive vapours or salt
30
Storage, unpacking, assembly and installation
Connecting medium voltage cables
The medium voltage cable connection
requires that cable channel depth
to be sufficient so as to ensure
the possibility of observing cable
mounting bend radius allowed for the
type of cable used.
Connecting medium voltage cables
according to the following sequence of
operations:
• Open the access compartment
covers of the connection cables
compartment;
• Remove the shutter pieces on the
floor of the enclosure;
• Raising the cable from the channel
through the enclosure, over a
sufficient distance for terminating
the connection;
• Terminating the cables .This
instruction does not relate to
making the terminal ends or the
crimping of cable lugs. These
operations must be done as
recommended by their suppliers;
Positioning and securing the cable
to the appropriate terminals:
Terminal screw tightening torque
is recommended in the following
table:
Switchgear Type P2490_1
Terminal Screw
Type
Recommended
tightening
torque [Nm]
M12 / group 8.8
75
Switchgear Type P2490_2
Terminal Screw
Type
Recommended
tightening
torque [Nm]
M10 / group 8.8
50
• After that reinstall the shutter
plates to the floor and secure the
appropriate cable with the fixing
clamp;
• Connect the cable’s earthing straps
to the earth bar;
• Fixing the cables must be done on
their outer shell. No cables to be
connected on terminations;
• Complete clean the cable
compartments, removing all foreign
bodies, then close, lock and secure
with screws the compartment
covers.
Fitting the secondary circuits
elements
• Re-establish the electrical
connections between enclosures as
per the electrical diagrams;
• Install the devices that have been
dismantled for transport and
connect their connecting wires as
per the electrical diagrams;
• Install, if appropriate, the
voltage indicator lamps on the
corresponding sockets ;
• The waste materials resulting
from the assembly and connection
operations must be removed
from the area and from within the
products, and managed as waste
in accordance with environmental
laws.
Storage, unpacking, assembly and installation
31
Benefits of P2490_xx
Switchgear Range
Easy installation
• Standardized products with unitary
sizes;
• Lightweight;
• Basic works for site preparation;
• Unitary solutions for switchgear
switchgear’s coupling;
• Good access for installation.
Safe and easy operation
• Simple and intuitive manual
operation of the On/ Off devices
• Clear and ergonomically placed
block diagram;
• Mechanical interlocks insuring the
correct operation of the equipment;
• Front switchgear display indicating
the switchgear operation.
Safety of operating personnel
• Metallic and closed switchgear;
• Fully equipped for internal arc
protection;
• Indicators are provided to signal the
presence of voltage on cables;
• Earthing protection circuits are
provided on all cable outgoings
Compact Design
• Efficient use of space;
• Optimal solution on electrical
insulation and accessibility within
the switchgear.
Expendability
• Designed to be quickly coupled with
new switchgear in the same range;
• Liberty of choice to expand the
substation to the left or right;
• Do not require special tools or
spares for expansion;
• No extra costs;
Certified Quality
• Complete type tests in independent
and accredited laboratories;
• Electroalfa’s certified quality
system;
32
Benefits of P2490_xx Switchgear Range
Services provided for the product range
Services provided for
the product range
• Electroalfa is a leading national
manufacturer of medium voltage
electrical equipment.
SCADA integration
• Can be equipped with motor
actuators for remote control;
• Auxiliary contacts for transmitting
status of On/ Off devices in SCADA
• Upon request can be fitted with
SCADA compatible, protection,
operation, metering blocks.
Great Value
• Free of charge consultation for
selecting the appropriate technical
solution for each application
required.
Upon delivery, Electroalfa can provide
installation, testing, parameterization
and commissioning, or technical
assistance to carry out the applications
required.
Complete training is also offered
for the end user’s operating and
maintenance personnel.
Electroalfa provides maintenance
services for the entire life of the
product or occasionally, on request,
in order to maintain the equipment
supplied in good working order
and adapted to new requirements,
providing additional functionality
through upgrades or replacements
for products as a whole or just
components thereof (measuring
transformers, digital protection, etc.),
delivery of spare parts, collection at
the end of life and replacement with
new products.
Manolesti Deal 33
Botosani 710003, Romania
T (40-231) 532186 (87,88,89)
F (40-231) 532185
[email protected]
www.electroalfa.ro
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