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High Voltage Disconnectors
High quality and reliability delivered.
Answers for energy.
High-Voltage Disconnectors
available up to 800kV
Years of experience in high-voltage switching
technology go into the design and production of the
disconnectors that set an international trend. Customers
know Siemens as a powerful partner – a supplier
of attractive products and solutions at competitive
prices with high quality standard. We comply with
our customer’s demand for reliability, safety and costeffectiveness and serve them throughout the world.
Irrespective of your application our disconnectors
provide the best solution for your requirements every
time.
In the modern period, the switchyards are going for
unmanned stations and with the advent of digital relays,
the system is totally computerized and all actions are
being carried out away from the switchyard through
remote operation control, SCADA systems etc. Any failure
in operation on a command or maloperation can create
disastrous consequences like power loss, loss of equipment
or outages triggering even the grid failure.
Siemens Ltd. has an integrated facility for design, testing
and manufacturing of disconnectors at Hyderabad. Largest of its kind in India, this plant, manufacturers center
break, double break, pantograph and knee type disconnectors. The products range from 36kV upto 800kV for
various current ratings from 630A to 3150A* as well as
associated earth switches and drive mechanisms.
•
Expertise in manufacturing disconnectors for varied
climatic conditions.
•
Suggestions on possible interchangeability of
components/modifications at design stage itself to
optimize the resultant performance.
•
Accessories like insulators, support structure and
terminal connectors can also be supplied as per the
customers requirements.
•
Highly experienced service team for on-site supervision
of erection, commissioning and testing.
The disconnectors are supplied throughout India
covering almost all the switchyards/substations, power
stations, paper, sugar, cement, and petrochemical
Industries etc.
2
Under these circumstances, this would call for a very reliable
& quality conscious product in disconnectors.
Product Portfolio
Horizontal Double Break Disconnector
Double Break Dicconnector can be installed in locations,
which have minimal overhead clearance, as blades swing
open to the side rather than lifting upwards. Double
break disconnectors are normally supplied with earth or
without earth switch based on the requirement and they
can be either with mechanical gang or with electrical
gang operation in order to ensure the smooth operation
of all the three poles simultaneoulsy.They are excellent
for installations, which have large amount of fault current due to reverse loop contact design. The design of
two breaks per phase in series provides much greater line
charging or magnetizing current interrupting capability
with standard arcing horns.
Special Features in our Double Break Isolators:
Successfully type tested design meeting the
requirements of IEC 62271-102.
Successfully tested for short circuit level of 40kA,
50kA and 63kA.
Confirming to mechanical endurance of class M2
as per IEC requirements.
Horizontal Centre Break Disconnector
Centre Break Disconnector can be installed in locations,
which have minimal overhead clearance, as blades swing
open to the side rather than lifting upwards. An economic
advantage of using Centre Break Disconnector is that it
requires only six insulators per Disconnector versus nine
insulators required for Double End Break Disconnector.
Centre break disconnectors are normally supplied with
earth or without earth switch based on the requirement
and they can be either with mechanical gang or with
electrical gang operation in order to ensure the smooth
operation of all the three poles simultaneoulsy.
Special Features in our Centre Break Isolators:
Successfully type tested design meeting the
requirements of IEC 62271-102.
Successfully tested for Short circuit level of 40kA,
50kA.
Confirming to mechanical endurance of class M2
as per IEC requirements.
3
Pantograph Disconnector
Pantograph Disconnectors can be installed in locations
where coupling of buses/current transfer are required at
two different heights. Current transfer will take place from
the top-level bus to the bottom level bus through this type
of disconnector.
Pantograph disconnectors are normally supplied with one
earth switch and without earth switch based on the requirement and they are usually electrically gang operated in order to ensure smooth opeartion of all the three
poles simultaneously.
Special Features in our Pantograph Isolators:
Successfully type tested design meeting the
requirements of IEC 62271-102.
Successfully tested for Short circuit level of 40kA.
Confirming to mechanical endurance of class M2 as
per IEC requirements.
Horizontal Knee Type Disconnector
A particular advantage of using Horizontal knee type
disconnector is reduced vertical dimension and these
disconnectors can be used for any conventional application. The reliable and safe performance of our disconnector is ensured through silver plated contacts, a special
mechanism to achieve the high contact pressure and
4
completely free rotating unit bearings. Our disconnectors
can withstand short circuit current rating upto 50kA/1sec
and the applicable standard is IEC 62271-102.
Note: Further information will be provided on specific
request from customer
Operating Mechanisms
Siemens Disconnectors come with two types of operating mechanism depending on
the customer’s requirement
Motor Operating Mechanism
Snap action auxiliary switches with silver-plated
contacts for customer’s use.
Motor coupled with a reduction worm gear to
increase the output torque.
Provision for padlock.
Electrical interlock between breaker and
disconnector.
Motor rated for 415Volts, 3 phase AC or
220V/110V DC to meet the customers’
requirement.
Robust mechanical interlock between disconnector
and earth switch.
Local/remote control facility.
Manual Operating Mechanism
Single phase preventer and overload protection
device.
Hand lever operated or through reduction gear
depending on customer’s requirement.
Pole discrepancy relay in case of individual pole
operation.
Electro-Mechanical interlock.
Local manual operation in case of emergency
operation.
Provision for padlock.
Snap action for auxiliary contacts for customer’s
use.
5
Product Range & Technical Data
Horizontal Double Break Disconnector
Technical Particulars
Unit
Rated voltage (kV)
[kV]
36
72.5
123
145
245
420
Rated frequency
[Hz]
50
50
50
50
50
50
Rated current
[A]
3150
3150
3150
3150
3150
3150*
Rated short circuit withstand value
[kA]
25
40
40
40/50
40/50
40/50/63
S
3
3
3
3/1
3/1
3/1/1
Rated PF withstand voltage across isolating distance
[kVr]
80
160
265
315
530
610
Rated PF withstand voltage between live terminals
[kVr]
70
140
230
275
460
520
[kVp]
195
375
630
750
1200
1425
[kVp]
170
325
550
650
1050
1665
[kVp]
-
-
-
-
-
1245
[kVp]
-
-
-
-
-
1050
Rated short circuit duration
Rated Values
and ground
Lightning Impulse withstand across Isolating
distance
Lightning Impulse withstand between live terminals
and ground
Switching Impulse withstand across Isolating
distance
Switching Impulse withstand across between live
terminals and ground
Horizontal Centre Break Disconnector
Technical Particulars
Unit
Rated voltage (kV)
[kV]
36
72.5
123
145
245
420
Rated frequency
[Hz]
50
50
50
50
50
50
Rated current
[A]
3150
3150
3150
3150
3150
3150*
Rated short circuit withstand value
[kA]
25
40
40
40
40
40/50
S
3
3
3
3
3
3/1
Rated PF withstand voltage across isolating distance
[kVr]
80
160
265
315
530
610
Rated PF withstand voltage between live terminals
[kVr]
70
140
230
275
460
520
[kVp]
195
375
630
750
1200
1425
[kVp]
170
325
550
650
1050
1665
[kVp]
-
-
-
-
-
1245
[kVp]
-
-
-
-
-
1050
Rated short circuit duration
Rated Values
and ground
Lightning Impulse withstand across Isolating
distance
Lightning Impulse withstand between live terminals
and ground
Switching Impulse withstand across Isolating
distance
Switching Impulse withstand across between live
terminals and ground
6
Pantograph Disconnector
Technical Particulars
Unit
Rated voltage (kV)
[kV]
-
-
-
-
245
420
Rated frequency
[Hz]
-
-
-
-
50
50
Rated current
[A]
-
-
-
-
3150
3150*
Rated short circuit withstand value
[kA]
-
-
-
-
40
40
S
-
-
-
-
3
3
Rated PF withstand voltage across isolating distance
[kVr]
-
-
-
-
530
610
Rated PF withstand voltage between live terminals
[kVr]
-
-
-
-
460
520
[kVp]
-
-
-
-
1200
1425
[kVp]
-
-
-
-
1050
1665
[kVp]
-
-
-
-
-
1245
[kVp]
-
-
-
-
-
1050
Rated short circuit duration
Rated Values
and ground
Lightning Impulse withstand across Isolating
distance
Lightning Impulse withstand between live terminals
and ground
Switching Impulse withstand across Isolating
distance
Switching Impulse withstand across between live
terminals and ground
Horizontal Knee Type Disconnector
Technical Particulars
Unit
Rated voltage (kV)
[kV]
-
-
-
-
-
800
Rated frequency
[Hz]
-
-
-
-
-
50
Rated current
[A]
-
-
-
-
-
3150*
Rated short circuit withstand value
[kA]
-
-
-
-
-
50
S
-
-
-
-
-
1
Rated PF withstand voltage across isolating distance
[kVr]
-
-
-
-
-
1150
Rated PF withstand voltage between live terminals
[kVr]
-
-
-
-
-
830
[kVp]
-
-
-
-
-
2100(+455)
[kVp]
-
-
-
-
-
2100
[kVp]
-
-
-
-
-
1175(+650)
[kVp]
-
-
-
-
-
1550
Rated short circuit duration
Rated Values
and ground
Lightning Impulse withstand across Isolating
distance
Lightning Impulse withstand between live terminals
and ground
Switching Impulse withstand across Isolating
distance
Switching Impulse withstand across between live
terminals and ground
* The rating of disconnector for 4500A is available against specific request.
7
A worldwide 24 hours service is available, which immediately
sends out service personnel and/or delivers spare parts as needed.
Customer Support Center: Toll free Phone no. in India: 1800 2667 480
Email: energysupport.in@siemens.com
XX-XX-XXX-XXX
Siemens Ltd.
Plot No 89 and 90, IDA -Gandhinagar,
Balanagar(Post), Hyderabad-500037,
Andhra Pradesh,India
Fax:+91 40 23079992
www.siemens.com/energy
Product upgradation is a continuous process. Hence, data in
this catalog is subject to change without prior notice. For the
latest information, please get in touch with our Sales Offices.