electro mecanica, typevd-gsmi 34.5kv vacuum breaker & grounding breaker -(interlocked)
DESCRIPTION
Combined 34.5kV Vacuum Circuit Breaker and Grounding Breaker. Inovative Switching and Grounding of Wind Collection Circuits.TRANSCRIPT
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Innovative Switching & Groundingof Wind Collection Circuits
VDH/GSMITM
- Page 1 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
- Page 2 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
- Page 3 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
- Page 4 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
EMA Electromecanica S.A. now offers model VDH/GSMI 38 kV class, high speed grounding switch which eliminates the need of Grounding Transformers on wind farm collection systems.
The complete assembly provides 200 kV BIL and is available at 1200 & 2000 A ratings, manufactured and tested to meet ANSI C37 and IEC 62271-100 standards.
VDH/GSMI: The Switch
VDH/GSMI model combines a vacuum circuit breaker with a high-speed, mechanically-interlocked grounding breaker within the same outdoor enclosure.
- Page 5 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
- Page 6 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
- Page 7 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
VDH/GSMI Electrical Ratings
34.5
KV
Rated
Voltage
3412.5------Grounding
Breaker
60
68
85
106
25
31.5
40
25
31.5
40
1200
200038
Circuit
Breaker
HzkAkA (3 sec)kAAKV
Rated
Frequency
Making
Capability
(Peak)
Short Time
WhitstandCurrent
Symmetrical
InterruptingCapability
Rated
ContinuousCurrent
Rated
MaximumVoltage
80
kV
Dielectric
Strength
Withstand 60
Hz-1 min
---------Grounding
Breaker
1212 to 16
4 to 113040
200
Circuit
Breaker
msecmsecmsecmsecmseckV
Maximum
Electrical
Switching
Time
Rated
Mechanical
Switching
Time
Rated Arcing
Time
Rated
Opening
Time
Rated
Closing Time
Dielectric
Strength
Impulse Full
Wave (BIL)
- Page 8 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
mminchesDimension
147.6
70.9
70.9
C
B
A
3750
1800
1800
C
BA
Dimensions & Weight
kgpounds
4070Weight 1850
- Page 9 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Enclosure is metal enclosed, self-supporting and free standing construction, with weatherproof design suitable for installation in an unprotected environment.
All exterior parts fabricated from steel sheet with an electro-chemical process as anticorrosive protection which provides longlasting perfomancein corrosive or contaminated environments.
Design Characteristics
Roof assembly specifically fabricated in aluminium to prevent eddy currents around bushings.
Easy installation and accessibility, minimal maintenance and long service life.
- Page 10 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Front View (without door) / Main Components
Connector
Bushing
Control Push-Buttons& Indicating Lamps
Supporting Frame
Operating & CommutationMechanism
Grounding Bar
- Page 11 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Section View / Main Components
Connector
Bushing
Current Transformer
Operating & CommutationMechanism
Vacuum Circuit Breaker
Main Busbars
Mechanical Interlock
Vacuum Grounding Breaker
Supporting Frame
Auxiliary & Terminal BlocksCompartment
Grounding Bar
- Page 12 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
The Main Breaker & Grounding Breaker Unit
Vacuum interrupters manufactured by EATON
Three-pole double vacuum circuit breaker “VED”series manufactured by EMA
Operating mechanism with stored energy springoperated device
Main breaker (upper vacuum interrupters) connectsgenerator collection circuits to the transformer bus
High speed, mechanically interlocked groundingbreaker (lower vacuum interrupters) connectscollection circuits automatically to ground
Complete switching sequence (time duration foropening main breaker through closing groundingbreaker) is mechanically accomplished in less than 1 cycle @ 60 Hz (between 12 to 16 milliseconds), with a maximum electrical switching of 12 milliseconds.
- Page 13 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Switching Oscillogram
In this oscillogram, channel 1 is the analog representation
of the main breaker contact traveling, while channel 2 is
the representation of the contact mechanical positions of
both main breaker and grounding breaker, connected in a
parallel circuit.
This shows that complete switching sequence (time
duration for opening circuit breaker thru closing grounding
breaker) was accomplished in 14.76 msec, and the main
breaker contact traveled more than 75% of its total stroke
when the grounding breaker closed.
- Page 14 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Bushings
Standard creepage distance 31 mm/kV
Cycloaliphatic epoxy resin or Porcelain type
Dimensions suitable to fit up to 2 CT’s per phase
Designed for very heavy pollution levels
Extra creep bushings optionally available
- Page 15 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
Bushing Current Transformers
Cast resin or tape wrapped type
600 V insulation level
Single or multi ratio
Relaying or metering type
Quantity, ratio and accuracyaccording to project requirements
Installed around the bushings on theunderside of the roof
Shorting terminal blocks forsecondary terminations located in theauxiliary compartment of the enclosure
- Page 16 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
VDH/GSMI: Advantages, Features and Benefits
Typically over $40,000 per circuit first cost savings
Advantages, features and benefits of use of the VDH/GSMI model as compared to grounding transformer + conventional substation breaker include:
Elimination of grounding transformers core losses which saves substantial $ overproject life
Lower procurement lead times
Lower time required to install
Lower installation labor & material costs
Higher MTBF (Mean Time Between Failures)
Lower MTTR (Mean Time To Repair)
Typically better delivery times
- Page 17 -
COMBINED 34.5 KV VACUUM CIRCUIT BREAKER & GROUNDING BREAKERMECHANICALLY INTERLOCKED ‘VDH/GSMI’ SERIES
ELECTROMECANICA
U.S. Wind Projects / Service Backup
Over sixteen (16) large U.S. wind projects are now utilizing EMA Grounding Switches for their collection circuits, located in:
Texas
Wisconsin
Oregon
California
EMA Electromecanica S.A. maintains a Service Agreement with National Switchgear Systems Inc. located at Lewisville, TX, to provide 24/7 USA parts and service backup.
Kansas
New York
- Page 18 -