HV CIRCUIT BREAKER DEAD TANK TYPE
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Transcript of HV CIRCUIT BREAKER DEAD TANK TYPE
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Customer Benefits
Explosion-proof design
Special accuracy classes:TPS, TPX, TPY, TPZ, PR
Mineral & synthetic oil-filled;PCB free
Low maintenance
Extensive experience in highly
active seismic regions
Compact construction
Built for long life
Non-corrosive hardware
Hermetically sealed for long life
Stable accuracy over a long
period of time
CTHCurrent Transformers72.5 to 765 kV
T&D
INSTRUMENT TRANSFORMERS
For years, tens of thousands of CTH have been
installed all over the world. In all types of climates
and under even the most severe conditions, our
units give complete satisfaction to the most
exacting customers.
The CTH operates both as a sensor and an
essential interface between the high voltage
transmission network and the low voltage systems.
The great success of this series is the achievement
of a very careful design entirely focused towards
addressing two major goals: security and long life.
> Metering - Relaying
> Performance: Un: 72.5 to 765 kV
In: up to 4800 A
In short-circuit : up to 80 kA1 (Isc dyn: 200 kA peak)Secondary cores : from 4 to 8
> Characteristics : High quality paper-oil insulation
Top core design with metal head
Oil expansion by stainless steel bellows
Bellows position indicator
Secondary cores in aluminum boxSingle, double or triple ratio at the primary side depending
of the voltage level
> Compliance with IEC, ANSI / IEEE or equivalent standards
LIFE TIME
Excellent field experience confirms the soundness of our technical concepts, and
our clients have expressed their total satisfaction with our products.
CTH have been designed for a 30 year life-time but many well out-live this service life.
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CTH maintains accuracy with minimal maintenance
during a life-time of at least 30 years.
INSULATOR
The head of the current transformer is mounted abovea porcelain insulator suitable for the required voltage
and environment.
The standard CTH resists medium intensity seismic
events. For highly active seismic regions, the design isadapted accordingly (special porcelain insulators,
damping device at the base of the transformer).
Custom design options also include the utilization of
composite insulators which can be quoted on request.
EXPLOSION-PROOF DESIGN
In case of an exceptional catastrophic failure (direct
lightning strike for instance), the CTH current
transformers reduce considerably the consequences ofsuch failure, thanks to the following designarrangements:
> Reduced oil volume,
> Internal ground conductors with sufficient cross
section for handling the fault current,
> Tank head designed to prevent projection of parts in
case of fault,
> Special design to prevent the transmission, inside
the porcelain insulator, of the over-pressure wave
that originates in the head at the time of the fault.
The efficiency of this design has been tested in various
laboratories and the porcelain remains intact.
MAINTENANCE
The CTH current transformer is a reliable apparatusthat requires only a limited amount of maintenance
operations. Its role of sensor and interface is essential
for effective and secure network operation. However,preventive maintenance carried out by experts is
recommended to ensure the longevity of your
installations and the safety of your personnel.
We offer you a full range of services, from preventive
maintenance, to corrective maintenance to" la carte maintenance" or replacement of material.
As instrument transformer experts for many decades,you can always count on our expertise and our spare
parts stock.
We have the necessary resources to helpyou keep your installations operating efficiently,
reliably and without risks for your employees
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Available versions
Our policy is one of continuous development. Accordinglythe design of our products may change at any time.Whi lstevery effort is made to produce up to date literature, thisbrochure should only be regarded as a guide and isintended for information purposes only. Its contents do notconstitute an offer for sale or advise on the application of
any product referred to in it. We cannot be heldresponsible for any reliance on any decisions taken on itscontents without specific advice.
AREVA T&D Worldwide Contact Centre:
http://www.areva-td.com/contactcentre/
Tel.: +44 (0) 1785 250 070
www.areva-td.com
VIPREHVB-L3-CTH-GB--
AREVA-2004.
AREVA,
theAREVAlogoandanyalternativeversionthereofaretradem
arksandservicemarksofAREVA.
A l l t d t d k t i d h i
h t h i t d t t h t f t h i P
i t d i B l i
According to IEC 60044-1
( ) Other value on request.
Owing to the flexibility of the range of models, there are various available size of the heads. Several metering or
relaying cores can be accommodated with rated primary current up to 4800 A, and with short circuit withstand
current up to 80 kA r.m.s. 1 sec. and 200 kA peak. Various type of insulators can be used according to the
environmental conditions of the site.
Indicatives values only - All indicated dimensions must be confirmed with order.
ELECTRICAL CHARACTERISTICS
Type
CTH 72
CTH 100/123
CTH 145
CTH 170
CTH 245
CTH 300
CTH 362
CTH 420
CTH 550
CTH 765
Highest system voltage
kV r.m.s.
72,5
100
123
145
145
170
170
245
245
300
300
362
362
420
420525 (550)
525 (550)
765
765
Rated 1 min. 50/60 Hz
withstand voltage
kV r.m.s.
140
185
230
230
275
275
325
395
460
395
460
460
510 (575)
570
630 (680)630
680 (860)
880
975
Rated lightning impulse test
voltage (BIL) 1.2/50 s
kV peak
325
450
550
550
650
650
750
950
1050
950
1050
1050
1175 (1300)
1300
1425 (1550)1425
1550 (1800)
1950
2100
Switching impulse test
voltage 250/2500 s
kV peak
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750
850
850
950
1050
10501050
1175
1425
1550
DIMENSIONS
Type
CTH 72
CTH 100CTH 123
CTH 145
CTH 170
CTH 245
CTH 300
CTH 362
CTH 420
CTH 550
CTH 765
TotalHeight
mm
2385
23852385
2535
2735
3470
3740
4500
4500
5150
7550
TotalWeight
kg
375
375375
385
380
445
475
850
850
1200
3540
Oil
l
53
5353
54
55
88
94
190
190
300
980
Min. creepagedistance
mm
3075
30753075
3625
4250
6125
8250
10913
10913
13425
19511
INQUIRY CHECK LIST
>Applicable standards
> Rated frequency
> Highest system voltage
> Test voltages (power frequency,
lightning impulse)
> Primary/secondary rated currents
> Short time current and duration
> Core rating (burden, accuracy)
> Environmental conditions (altitude,
temperatures, pollution, seismicconditions)
> Options:
- Composite insulator
- Surge arrester on secondary
winding
- Ground cable connector- Primary terminal- Damping devices for use in highly
active seismic regions
>Available accessories :
- Tg F tap
- OIl sampling valve
- Lifting bar- Oil sampling tools kit
- Shocks indicators during shipment
