STS brochure

STS brochure
Est.1968
Static Transfer Switches
STSt 100 - 3000A
STSi 100 - 3000A
Concept
Static Transfer Switches (STS) are essential for
achieving highly reliable and redundant supply to
critical systems.
The STS provides power to items requiring a single
AC supply by selecting from one of many input AC
supplies. If one supply becomes unavailable the STS
automatically transfers the critical load to an
alternative AC supply source. Manual selection of
supply is also possible.
Supply A
Supply B
Qa
Qb
STS
Maintenance
bypass B
Maintenance
bypass A
Qc
Qe
Qd
Load
Applications
STSs are suitable for back up power supply
protection where multiple independent supplies
are available on stand-by and ready for use
when required.
Typical STS applications include:
• data centres to eliminate single points of (power
supply) failure
• active maintenance bypass for UPS
• fault isolation
Thycon’s Point of Wave Transfer
Technology ... ensures the STS transfers
to the same point of the alternative
supply’s waveform therefore minimising
inrush to supply sensitive loads such as
transformers, drives and motors.
STS features and benefits
• Thycon’s Point of Wave Transfer Technology
• microprocessor-based diagnostics and controls
• high fault clearing capability
• high overload capacity
• soft-start control
• fibre optic firing control
• robust technology
• no moving parts
• fuseless design
• high efficiency
• high reliability
• long life
• cost effective
• low maintenance cost
• compact, modular construction
• indoor or outdoor enclosures
• Australian made
Principle of operation
Thycon provides two classes of static transfer switch
for the various requirements of critical systems:
• Thycon STSt
• Thycon STSi
Both classes statically interrupt the supply to the load
the instant a failure of the incoming AC source is
detected. The load is isolated and then immediately
re-connected to the alternative source.
Both the STSt and STSi implementation use breakbefore-make transfer characteristics to ensure that
two supply sources can be truly independent and
that the failure of one has no impact on the other.
1
Computer server room
The Thycon STSt and STSi inhibit transfer and raise
an alarm condition in the system monitor under the
following fault conditions:
• open circuit switching device within the STS
• short circuit switching device within the STS
• supply phase synchronism out of tolerance
• output phase voltage imbalance
• control fault
• load fault
• device over-temperature
• ambient over-temperature
Thycon STSt
The Thycon STSt uses thyristor switch technology
that can:
• switch supplies in typical conditions in less than
5ms (1/4 power cycle)
• switch supplies to the same point of the alternative
supply’s waveform
• switch with up to ±15 degrees phase shift between
supplies (user defined)
•
•
switch supplies in less than 0.5ms under any fault
condition
switch with up to ±180 degrees phase shift in
supplies without feeding or damaging the
overtaking supply or load
Today, a single IGCT can switch in excess of 4000A
and 6000V.
Like the Thycon STSt this technology also uses large
safety factors, is proven to achieve high reliability and
longevity but is higher in cost.
STSt can have break times of 5 milliseconds under
fault conditions as thyristors naturally turn off at zero
current crossovers or by external commutation. In
certain fault conditions, these break times can take in
excess of 10 milliseconds. An IGCT however, will
guarantee turn-off within microseconds and ensure a
break time of approximately 500 microseconds.
This proven, robust technology uses large safety
factors, achieves high reliability and longevity and is
very economical. Today, single thyristors can switch
in excess of 5000A and 10,000V.
Installation and testing
To ensure high reliability, independent sources
with high MTBF and low MTTR must be connected
to the STS.
Thycon STSi
The Thycon STSi uses IGCT (Integrated Gate
Commutated
Thyristor)
switch
technology
which can:
It is essential that the STS load transfer time is
suitable for the system load requirements and that
the faulty supply cannot feed or damage the
overtaking supply or load.
2
Data centre
The STS offers modular design for quick and easy
site installation. All that is required is the installation of
power cables and control/monitoring cabling. The
STS is tested comprehensively prior to delivery and
needs minimal site commissioning.
This proven, robust technology uses large
safety factors, achieves high reliability and
longevity and is very economical.
An STS can also be provided as a complete
containerised assembly that can be placed in the
harshest Australian conditions and easily relocated to
other sites.
availability of engineers and parts at minimum
cost to the customer. Qualified engineers perform
the maintenance with the full back up and resources
of Thycon.
Reliability and maintenance requirements
Thycon has been supplying static switches for
40 years and has demonstrated their high reliability
and low maintenance demands in critical
applications in defence, telecommunications,
computer centres and manufacturing.
Power electronic converters can be forced or
naturally cooled, which contributes to high reliability
and low ongoing maintenance. The power
components
(switchgear
and
instrument
transformers) are all standard commercial products
of proven reliability and life expectancy.
Training and support
Training and support can be provided to on-site
personnel to ensure that they are fully versed in the
operation, maintenance and fault rectification of the
Thycon STS.
Thycon STS maintenance requirements are
dependent on environmental and application
conditions.
We
accommodate
customer
requirements from basic to full warranty
maintenance. Each maintenance plan ensures the
equipment operates in top condition with maximum
Control and monitoring
Smart digital signal processing provides fast and
accurate control of the STS. Point of wave transfer
technology ensures minimal transfer inrush to
transformer loads and out of synch transfer during
fault conditions.
An optional soft-start mechanism at turn-on can
provide low inrush current to transformer loads
during automatic or manual transfers.
STSs can be controlled and monitored from the unit
itself and remotely via serial, TCP/IP or SCADA.
3
Static interrupter
Control and status
The STS provides
control interface.
a
simple
mimic
and
The STS system monitor mimic diagram enables the
operator to see the path of power flow at a glance.
Push buttons are used to transfer the STS from
supply A to supply B. LEDs indicate the status of the
STS including A and B supply selection, A and B outof-synch alarm and general alarm.
Monitoring
The STS system monitor is a smart LCD panel
featuring a simple and effective user interface that
incorporates advanced diagnostic facilities enabling
immediate access to:
•
•
•
•
•
power monitoring – voltage / current / kW / kVA /
power factor / harmonic distortion
operating status and alarms
event history
password protected user defined settings
service control and test options
The system monitor stores the last 200 system
events in a non-volatile information buffer for fast,
efficient fault diagnosis and status indication even
after a re-start or a complete power outage.
... stores the last 200 system events in a
non-volatile information ... even after a restart or a complete power outage.
Low-level interface
In the form of 8 standard voltage-free contacts,
operating status of the equipment to a remote
monitoring system can be performed.
High-level interface
Real-time performance monitoring of the STS is
performed via serial or TCP/IP connection. A basic
hardcopy of operating events and data can be
obtained by connecting a printer. An optional highlevel interface via Modbus, SNMP or web html can
be provided for immediate performance monitoring
and analysis. Additional features enable you to notify
your network server of alarm conditions, perform
automatic low battery autonomy shutdowns of the
critical load and send emails to designated
recipients.
STS data such as real-time waveforms, alarms and
system events can be stored in solid state, nonvolatile memory holding up to 500 MBs of
information. Connecting the STS to a PC using any
of the available ports allows you to maintain a full
history of the equipment over its lifetime.
4
s
M
A
ss
s
B
c
X
STS
STS monitor
Options
Soft-start facility
A soft-start mechanism at turn-on provides low
inrush current to transformer loads.
Thycon’s Point of Wave Transfer Technology can be
used to provide superior transfer characteristics
when the alternate supply is out of synch during a
fault-initiated transfer. This world-leading technology
ensures the STS transfers to the same point of the
alternative supply’s waveform therefore minimising
inrush to supply sensitive loads such as
transformers, drives and motors.
Remote monitoring
Modem connection enables the STS to dial and
notify Thycon or a remote user automatically
whenever an alarm condition arises. Thycon’s
Service Centre automatically logs data, performs
analysis and diagnostics and then alerts our 24-hour
staff if further intervention is required. All STS
utilisation and incidents found or reported are logged
and a full report is provided for each occurrence. The
report highlights remedial actions, cautions and
follow up recommendations. Alternatively, the remote
user can interrogate the STS at will.
... a complete containerised assembly
that can be placed in the harshest
Australian conditions and easily relocated
to other sites.
Thycon power system monitor
The STS monitor offers the user a web-based
interactive diagnostic tool and database
management system for continuous real-time
monitoring of STS system utilisations, alarms, events
and variables. The database management logs data
to your PC’s hard disk for future analysis and display.
Container modules
The STS can be provided as a complete
containerised assembly that can be placed in the
harshest Australian conditions and easily relocated to
other sites. Each module is self-contained enabling
use in applications varying from city building rooftops
to coastal oil rigs to outback mining stations.
5
Thycon STS advantages
Design advantages
Simple, reliable design
Uncomplicated design facilitates high strength, durability and reliability. The power circuit uses
simple, robust switches to enable fast and efficient transfer.
Robust technology
Robust construction achieves reliable performance and long equipment life, as proven by
40 years of Thycon installations.
Component rating
Commercially available standard mains frequency thyristors are used as single devices up to
2.4kA. No series or parallel matching of components is required to achieve high-power
applications.
Thyristor technology
Use of thyristors (SCRs) eliminates the need for special high-speed semiconductor fuses
resulting in a simpler design with increased reliability. Thyristors have the highest power and
fault tolerance of all semiconductor devices and can withstand faults of up to 10 times the
current for 1000 times the period of IGBT and transistor switching technologies.
Fuseless design
Operates without power fuses. Power components are liberally over-rated so that simple and
reliable methods of circuit breaker protection can be used. This greatly reduces downtime and
eliminates the need for stock control of spare fuses.
Surge protection
Built-in surge protection increases the attenuation of over-voltages caused by distribution faults
and lightning.
Compatibility
The control panel provides the operator with an efficient, user-friendly interface.
Modular construction
Construction from standardised components and modules ensures high mean time between
failures (MTBF) and low mean time to repair (MTTR).
Environment
No special ventilation or air conditioning is required. The equipment is at home in computer
rooms or in harsher environments without de-rating. Thycon equipment can be containerised
and installed in the extremes of Australian environments.
Performance advantages
Point of Wave Transfer
Technology
Thycon’s world-leading Point of Wave Transfer Technology enables fast, dynamic transfers
without the fear of “out of synch” consequences during supply fault conditions. This technology
allows transfer to the same point of the alternate supply to ensure the load can never see an
out of synch transfer and prevents inrush current effects of loads during automatic transfers.
Fault current capability
Supplies 10-20 times the rated current under load fault short circuit conditions.
Efficiency
System operates up to 99% efficiency resulting in low running costs and heat dissipation.
6
Technology comparison
Parameter
Bi-directional
Integrated Gate
Thyristor
Commutated Thyristor
Static Transfer
Static Transfer
Switch - STSt
Switch - STSi
Rating range
200 - 2800 amps
300 - 2000 amps
Efficiency
99%
98.6%
Fault capacity
up to 100kA
up to 30kA
Over load capability at 150%
120s
120s
Over load capability at 1000%
1000ms
500ms
Allowable crest factor
>5
>5
Device safety margin (typ)
1000%
500%
Manual transfer time (asynchronous)
0 - 1s
0 - 1s
Fault transfer time
< 5ms
< 1ms
Fault detection time
0.5ms
0.5ms
Operation during load fault
Remains online until
Remains online until
protection activates
protection activates
OR
OR
disconnects output to
disconnects output to
protect weak source.
protect weak source.
(< 5ms)
(< 1ms)
Failure mode
Short circuit
Short circuit
Operational reliability factor
0.999
0.995
MTBF
250,000 hrs
200,000 hrs
MTTR
1 hr
1 hr
Transfer mode
Break before make
Break before make
Make/break
< 0.1ms
< 0.01ms
Remote transfer capability
Yes
Yes
Voltage protection
Yes
Yes
Protection method
Thermal/magnetic
circuit breaker
Thermal/magnetic
circuit breaker
Specifications are subject to change without notice
7
THYCON INDUSTRIAL PTY LTD
THYCON INDUSTRIAL PTY LTD
THYCON INDUSTRIAL PTY LTD
THYCON INDUSTRIAL PTY LTD
20 AUDREY AVE COBURG
9 WRIGHTS RD DRUMMOYNE
10 LISTER CRESENT AINSLIE
11 PRESTON ST COMO
3058 VIC AUSTRALIA
2647 NSW AUSTRALIA
2602 ACT AUSTRALIA
6152 WA AUSTRALIA
PH 61 3 9319 9000
PH 61 2 9911 6601
PH 61 2 6161 1548
PH 618 9367 0620
FAX 61 3 9319 9001
FAX 61 2 9911 6602
FAX 61 2 6161 7789
FAX 61 8 9457 2597
ABN 17 068 011 049
EMAIL info@thycon.com.au
WEB www.thycon.com.au
24-HOUR SERVICE 1800 670 700
Published by Thycon
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