COMEM Combined Resin Silicon Bushings CRS User manual

Combined Resin Silicon Bushings CRS
EN-IT-DE-ES-FR
INSTRUCTION MANUAL

2
CONTENT INDEX
Content index
Safety ...........................................................4
Product description ......................................4
Installation....................................................4
Electrical connection....................................5
Technical features........................................6
Operation and maintenance .........................6
Appendix A - Overall dimensions
and drawings ............................................. 29
CRS (24-72.5KV/1250-6300A)...................29
CRS (24-36KV/250-630A) ..........................30
Fixing ange................................................31
Indice dei contenuti
Sicurezza......................................................9
Descrizione del prodotto ..............................9
Installazione .................................................9
Connessioni elettriche............................... 10
Caratteristiche tecniche ............................ 11
Funzionamento e manutenzione ............... 11
Appendice A - Dimensioni e disegni............29
CRS (24-72.5KV/1250-6300A)...................29
CRS (24-36KV/250-630A) ..........................30
Fixing ange................................................31
Inhalt
Sicherheit ...................................................14
Produktbeschreibung ................................ 14
Installation................................................. 14
Elektrische Verbindungen.......................... 15
Technische Merkmale ............................... 16
Betrieb und Instandhaltung ....................... 16
Anlage A - Gesamtabmessungen und
Zeichnungen.............................................. 29
CRS (24-72.5KV/1250-6300A)...................29
CRS (24-36KV/250-630A) ..........................30
Fixing ange................................................31
Índice de contenidos
Seguridad ...................................................19
Descripción del producto........................... 19
Instalación................................................. 19
Conexiones eléctricas ............................... 20
Características técnicas............................ 21
Funcionamiento y mantenimiento............. 21
Apéndice A - Dimensiones generales y
Planos........................................................ 29
CRS (24-72.5KV/1250-6300A)...................29
CRS (24-36KV/250-630A) ..........................30
Fixing ange................................................31

3
Index du contenu
Sécurité ......................................................24
Description du produit............................... 24
Installation................................................. 24
Connexions électriques............................. 25
Caractéristiques techniques...................... 26
Utilisation et entretien ............................... 26
Annexe A – Dimensions hors tout et
Dessins ..................................................... 29
CRS (24-72.5KV/1250-6300A)...................29
CRS (24-36KV/250-630A) ..........................30
Fixing ange................................................31

4
Safety
Installation
Safety instructions
Make sure that any person installing and operating the CRS:
• Is technically qualied and competent
• Fully comply with these assembling instructions
Improper operations or misuse could cause danger to:
• life and limb.
• to the equipment and other assets of the operator.
• to the equipment proper function.
Safety instructions in this manual are shown in three diffe-
rent forms to emphasize important information.
Safety notes on the equipment operation
Electrical installation is subject to the relevant national
safety rules.
This information indicates particular danger to life and health.
Disregarding such a warning can lead to serious or fatal injury.
All relevant fire regulation must be strictly followed.
This information indicates particular danger to equipment or
other property of the user. Serious or fatal injury cannot be
excluded.
Installation, electrical connection and fitting the device may only
be performed by qualified personnel and only in accordance to
this instruction manual.
It is the responsibility of the user to ensure that the device is
used for specified application only.
For safety reasons, please avoid any unauthorized and improper
usage.
This notes give important or specific information concerning the
equipment or as to work with the equipment.
WARNING
WARNING
CAUTION
CAUTION
The operating and installation requirements described in this
manual must be strictly followed. If not, the device can be
damaged or a malfunction may occur.
Ground tap must be grounded using the provided cable. Ground
tap cannot be used for monitoring purpose.
CAUTION
Electrical connections may only be carried out by qualified,
skilled personnel trained in the applicable health and safety
regulations of the relevant country. Care must be taken over
electrical connection to avoid ionization phenomena.
Choose the section of the connections to be used and connect
them applying the torque recommended in Table 1 as a function
of the rated current of the CRS insulation bushing.
CAUTION
NOTE
Cable connection
Product description
CRS is a non-condenser bushing. CRS has to be ground-
connected by using the pins close to the xing ange.
These bushings are designed to operate with the upper
part in air and the lower part immersed in the transformer
oil. CRS insulation bushings have been designed and
produced in conformity with the IEC 60137 standards.
Figure 1
Figure 2
COMBINED RESIN SILICON BUSHINGS CRS
This document is issued by means of a computerized system. The digitally stored original is electronically approved. The approved document has a date entered in the `Approved'-field. A manual signature is not required.
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly fobidden.
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DRAWING SHEET ISO 5457:1999-A2T
LAST REVISION
DESCRIPTION
MODIFICATO CODICE RIFERIMENTO SET - Changed P/N kit
REPLACED
REVISION
TOLLERANZE GENERALI SECONDO - GENERAL TOLERANCES ACCORDING TO ISO 2768
m
SCALE
NO
MATERIAL WEIGHT - kg
- - -
-
PROCESS PART NUMBER
- - 5COH046700
1/11
A
Development
NH-546
SHEETITERREVSTATUSDOCUMENT ID
ITABB-9AAE306693 ARCING HORN SET FOR CRS 52kV
RESPONSIBLE DEPARTMENT
ISTRUZIONI CRS
COMEM
TITLE / SUPPLEMENTARY TITLERESPONSIBLE COMPANY
Component Drawing-
PROJECT IDWORK ORDER IDBASED ON DOC IDDOCUMENT KINDAPPROVED ON
--Diego Boro
APPROVED BYREVIEWED BYCREATED BY
© COPYRIGHT ALL RIGHTS RESERVED
This document is issued by means of a computerized system. The digitally stored original is electronically approved. The approved document has a date entered in the `Approved'-field. A manual signature is not required.
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly fobidden.
F
E
D
C
B
8765432
A
1 109 11 12
G
H
1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
DRAWING SHEET ISO 5457:1999-A2T
LAST REVISION
DESCRIPTION
MODIFICATO CODICE RIFERIMENTO SET - Changed P/N kit
REPLACED
REVISION
TOLLERANZE GENERALI SECONDO - GENERAL TOLERANCES ACCORDING TO ISO 2768
m
SCALE
NO
MATERIAL WEIGHT - kg
- - -
-
PROCESS PART NUMBER
- - 5COH046700
1/11
A
Development
NH-546
SHEETITERREVSTATUSDOCUMENT ID
ITABB-9AAE306693 ARCING HORN SET FOR CRS 52kV
RESPONSIBLE DEPARTMENT
ISTRUZIONI CRS
COMEM
TITLE / SUPPLEMENTARY TITLERESPONSIBLE COMPANY
Component Drawing-
PROJECT IDWORK ORDER IDBASED ON DOC IDDOCUMENT KINDAPPROVED ON
--Diego Boro
APPROVED BYREVIEWED BYCREATED BY
© COPYRIGHT ALL RIGHTS RESERVED

5
Assembly on the transformer tank
Make a hole with diameter D (see Table 6) in the tran-
sformer tank, ensuring there are no uneven surfaces that
could cause problems for correct operation of the bu-
shing. The stud bolts for securing the bushing (see Table
6) must be placed along a circumference of diameter
D0-D3 coaxial with the hole made previously (Figure 1).
Position the gasket provided (Figure 1).
The bushing must be positioned as shown in Figure 2,
apply a tightening torque of 30 Nm (15 Nm in case of
250/630 A bushing) to x the nuts on the ange. Connect
a ground tap of the CRS bushing to a stud bolt with the
cable provided (Figure 3). The end of the cable with the
cable terminal diameter 5.3 mm must be correctly secured
to the ground tap using the material provided. The other
end of the ground wire must be secured to a stud bolt
using a nut and washer. Before performing any operations
check that there are no traces of paint on the contact
surface. The ground wire must be installed to ensure an
electrical contact with minimum resistance.
Figure 3
Table 1
Rated current [A] Recommended torque [Nm]
250 12
630 20
1250 30
2000 55
3150 60
5000/6300 Flag screw: 40
Cable terminal with 5.3 mm
hole, screw
Cable terminal with 13 mm hole, washer, nut Ground wire
Ground tap
Electrical connections may only be carried out by qualified,
skilled personnel trained in the applicable health and safety
regulations of the relevant country.
Care must be taken over electrical connection to avoid
ionization phenomena.
Choose the section of the connections to be used and connect
them applying the torque recommended in Table 1 as a function
of the rated current of the porcelain bushing.
CAUTION
Rated current (A) Recommended torque (Nm)
250 12
630 20
1250 30
2000 55
3150 60
4500 75
6300 110
5000-8000 115
Table 2
Electrical connection
Thread of bolt Recommended torque (Nm)
M10 25
M12 40
M16 90
Table 3
When the wires are connected to an upper terminal connector
(figure 7) tighten the bolts with a torque as in table 2. Make
sure that the connection is well performed in order to avoid
overheating.
CAUTION
Figure 4

6
Technical features
Standard Rated
voltage
kV
Rated
current
A
Lighting
impulse
kV
Dry power
frequency
kV
Partial
discharges
1.5Um/√3
pC
Creepage
distance
mm
Arcing
distance
mm
Lee
protected
line min.
mm
Pollution Operating
load
Nm
Oil withstand
temperature
range
°C
IEC 60137
24 250 150 55 10 710 285 240 P2
500 -20°C / 100°C
630
36 250 200 77 10 1320 500 480 P4
630
24 1250 150 55 10 1360 515 435 P4 625
-60°C/+120°C*
36 1250 200 77 10 1360 515 435 P4 625
24 2000 150 55 10 1565 515 637 P4 1000
3150 1575
36 2000 200 77 10 1565 515 637 P4 1000
3150 1575
24 5000 150 55 40 1300 490 503 P4 1575
6300 1575
36 5000 200 77 40 1300 490 503 P4 1575
6300 1575
52
1250
250 105 40 1630 563 662 P4
625
2000 1000
3150 1575
72.5 1250 325 140 90 2250 775 807 P4 625
2000 1000
* For -60°C we can deliver a special gasket upon request
Table 4
Operating conditions
The CRS insulation bushings can be used up to an altitude
of 1000 m. For installation at higher altitudes please
contact COMEM. Ambient temperature of air:
• MAX temp according IEC 60137
• MIN temp -20°C for CRS 24-36kV 250/630A; -40°C for
other CRS (on demand until -60°C, not for CRS 24-36kV
250/630A).
Transformer oil temperature:
• for normal load: max 100°C;
• daily average: 90°C.
Temporary over-voltages are allowed in accordance to the
standard IEC 60076-7.
Adaptor
To meet the different customers demands concerning the
connection typologies, the lower and upper part of the bolt
are realized with two adaptors (see Fig.4/A and 4/B).
The adaptors are screwed on the main bolt and, to avoid
their unscrewing (during transportation or operation) they
are xed with a grain and Loctite 270 (e.g.Fig. 4/C). This
type of connection guarantee robust and safety xing dur-
ing the operation. Do not unscrew the adaptor; the risk is
to damage irreparably the thread therefore this operation
is not allowed.
Operation and maintenance
Silicon shield re-conditioning
In case the silicon sheds show little damage along the
bushing life due to external agents (e.g. small holes), it
is possible to re-condition them by following the below
actions:
1. Clean the interested surfaces with water or soap
2. Insert in the hole the silicon material (the mix has to be
prepared in COMEM and the endurance is about 20
days storage in a refrigerator at 4÷6°C)
3. Heat the interested surface with a dryer (temperature in
the range 100÷130 °C) for 3 minutes.
4. Verify the consistence of the silicon (touching with the
ngers, it has to became hard).
5. To improve the esthetical aspect pass the surface with
thin sand paper.
Packaging
All CRS insulation bushings are shipped inside a cardboard
box positioned on a pallet to facilitate transport and storage.
If after the point 4 the polymerization is not completed, start again
from the point 3.
NOTE
COMBINED RESIN SILICON BUSHINGS CRS

7
This document is issued by means of a computerized system. The digitally stored original is electronically approved. The approved document has a date entered in the `Approved'-field. A manual signature is not required.
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly fobidden.
F
E
D
C
B
8765432
A
1 109 11 12
G
H
1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
DRAWING SHEET ISO 5457:1999-A2T
LAST REVISION
DESCRIPTION
MODIFICATO CODICE RIFERIMENTO SET - Changed P/N kit
REPLACED
REVISION
TOLLERANZE GENERALI SECONDO - GENERAL TOLERANCES ACCORDING TO ISO 2768
m
SCALE
NO
MATERIAL WEIGHT - kg
- - -
-
PROCESS PART NUMBER
- - 5COH046700
1/11
A
Development
NH-546
SHEETITERREVSTATUSDOCUMENT ID
ITABB-9AAE306693 ARCING HORN SET FOR CRS 52kV
RESPONSIBLE DEPARTMENT
ISTRUZIONI CRS
COMEM
TITLE / SUPPLEMENTARY TITLERESPONSIBLE COMPANY
Component Drawing-
PROJECT IDWORK ORDER IDBASED ON DOC IDDOCUMENT KINDAPPROVED ON
--Diego Boro
APPROVED BYREVIEWED BYCREATED BY
© COPYRIGHT ALL RIGHTS RESERVED
Rating plate data
The rating plate data is indicated on the metal ange of
each CRS bushing in accordance with the standard
IEC 60137:
• name of manufacturer;
• standard of reference IEC 60137;
• operating frequency fr;
• rated voltage Um;
• rated current Ir;
• year of manufacture;
• serial number of the CRS insulation bushing.
Figure 5
B
A
C
Acceptance
Upon receiving the bushing, the Customer must carry out
the following operations:
• Examine the outer surface of the packaging to check
that it is intact.
• Open the packing crate removing the lid.
• Check that the fastening elements are intact and well secured.
• Check that there are no breakages.
If damages are found, please contact COMEM, providing
the data on the shipping list and the serial number of the
CRS bushing.
Storage
The CRS bushing must be stored in the original packag-
ing indoors. Permissible storage temperatures are in the
range of -40 °C to 60°C.
Lifting
The CRS bushing has a sturdy packaging; nonetheless,
some precautions must be taken during handling to pre-
vent damaging the insulation bushing. As long as the CRS
is packaged, it must be handled using the pallet.
Insulation bushings out of the crate: to remove the
insulation bushing from the crate, screw an eyebolt tightly
into the upper end of the conductor. The rope for lifting
the bushing must be fastened to the eyebolt so that the
bushing cannot be damaged during transport.
The best position for transport out of the crate is vertical.
A horizontal position is not recommended as the silicone
sheds could be damaged.
The bushing must not be handled using the sheds, as this
could compromise correct operation
Cleaning
During the periodic maintenance of the transformer sheds
cleaning is recommended. If the bushing has a high level
of pollution due to the environment where it is installed,
we recommend cleaning at more frequent interval than
standard maintenance and physical cleaning with prefera-
bly isopropyl alcohol.
Bushing disposal
In case of bushing disposal, refer to the country current
regulation. CRS main materials are:
• Aluminum
• Copper
• Liquid silicon rubber LSR
• Epoxy resin Anticorodal ange.

8
Troubleshooting
Fault Physical phenomenon Solutions
Oil loss from the ange of
the bushing Leakage
Tighten the stud bolts to the recommended torque of 30 Nm.
Check correct positioning of the gasket.
Check the surface of the tank to ensure no uneven parts or excessive roughness.
There are hissing noises at
the ange Corona effect
The ground wire is not grounded.
The ground wire is not connected correctly because the contact surfaces are
insulated (i.e. check whether the contact surfaces are painted).
There are hissing noises at
the connection in air Corona effect Check whether the conductor connected to the bushing has any edges that cause increased electric eld density.Check the connection at the air end of the bushing.
Electric discharge at the air
end outside the bushing Electric discharge
Check the connection at the air end of the bushing.
Check the studs length (MAX 40 mm). Verify the presence of stud sharp edges
and remove them (a possible solution should be to apply a second nut to avoid
the sharp edges in the top part of the studs (for more details contact COMEM)
Abnormal distribution of
temperatures in the bushing. Thermal effect Check the connections applying the torque recommended in Table 2 and 3.
Check that the section of the conductors for connection to the bushing is correct
If the problem is not mentioned in the cases above, please contact COMEM
(S.R. 11 Signolo, 22 36054 Montebello Vicentino (VI) -Italy Tel [phone]
E-mail: [email protected]
Table 5
COMBINED RESIN SILICON BUSHINGS CRS

9
Sicurezza
Installazione
Istruzioni di sicurezza
Assicurarsi che il personale incaricato di installare e opera-
re sull’isolatore passante:
• sia tecnicamente qualicato e competente.
• rispetti pedissequamente queste istruzioni
d’assemblaggio.
L’uso improprio di questi oggetti potrebbe determinare
pericolo per:
• vita e arti
• attrezzatura e altri beni dell’operatore
• corretto funzionamento dell’attrezzatura.
Le istruzioni di sicurezza di questo manuale sono riportate in
tre diversi formati per sottolineare informazioni importanti.
Note di sicurezza sul funzionamento dell’apparecchiatura
L’installazione elettrica è soggetta alle leggi nazionali di
sicurezza.
Questa informazione indica un particolare pericolo per la vita e
la salute. Ignorare questo tipo di avvertimento potrebbe causare
ferite gravi o fatali
Il regolamento antincendio deve essere rigorosamente rispettato.
Questa informazione indica un particolare pericolo per
l'attrezzatura o altri beni dell'operatore. Ferite gravi o fatali non
sono da escludersi.
L'installazione, la connessione elettrica e il montaggio
dell'isolatore devono essere effettuati da personale qualificato e
solo secondo questo manuale di istruzioni.
E' responsabilità dell'utente assicurarsi che l'isolatore sia
utilizzato per la sua corretta applicazione.
Per questioni di sicurezza, evitare usi non autorizzati o impropri.
Questa nota offre informazioni importanti o specifiche
sull'attrezzatura o su come operarvi
AVVERTIMENTO
AVVERTIMENTO
ATTENZIONE
ATTENZIONE
Leggere attentamente questo manuale d'istruzioni prima di
mettere in esercizio l'isolatore.
La messa a terra deve essere assicurata tramite i cavi forniti a
corredo. La vite di terra non deve essere utilizzata a scopo di
monitoraggio.
ATTENZIONE
Le connessioni elettriche devono essere eseguite
esclusivamente da personale qualificato e formato secondo
le normative nazionali vigenti in materia di sicurezza e salute.
Particolare attenzione deve essere posta al fine di evitare
fenomeni di ionizzazione. Scegliere adeguatamente la sezione
del connettore da utilizzare e quindi collegarlo applicando una
coppia di serraggio come da tabella 1 (tale valore è in funzione
della corrente nominale del CRS).
ATTENZIONE
NOTA
Cablaggio
Descrizione del prodotto
Il CRS è un isolatore passante del tipo “non a condensato-
re”. Il CRS deve essere collegato a terra tramite le apposite
viti sopra la angia di ssaggio. Tali isolatori sono pro-
gettati per operare con la parte superiore in aria e la parte
inferiore in olio. Il CRS è stato progettato e prodotto in
conformità alla norma IEC 60137.
Figura 1
Figura 2
This document is issued by means of a computerized system. The digitally stored original is electronically approved. The approved document has a date entered in the `Approved'-field. A manual signature is not required.
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly fobidden.
F
E
D
C
B
8765432
A
1 109 11 12
G
H
1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
DRAWING SHEET ISO 5457:1999-A2T
LAST REVISION
DESCRIPTION
MODIFICATO CODICE RIFERIMENTO SET - Changed P/N kit
REPLACED
REVISION
TOLLERANZE GENERALI SECONDO - GENERAL TOLERANCES ACCORDING TO ISO 2768
m
SCALE
NO
MATERIAL WEIGHT - kg
- - -
-
PROCESS PART NUMBER
- - 5COH046700
1/11
A
Development
NH-546
SHEETITERREVSTATUSDOCUMENT ID
ITABB-9AAE306693 ARCING HORN SET FOR CRS 52kV
RESPONSIBLE DEPARTMENT
ISTRUZIONI CRS
COMEM
TITLE / SUPPLEMENTARY TITLERESPONSIBLE COMPANY
Component Drawing-
PROJECT IDWORK ORDER IDBASED ON DOC IDDOCUMENT KINDAPPROVED ON
--Diego Boro
APPROVED BYREVIEWED BYCREATED BY
© COPYRIGHT ALL RIGHTS RESERVED
This document is issued by means of a computerized system. The digitally stored original is electronically approved. The approved document has a date entered in the `Approved'-field. A manual signature is not required.
We reserve all rights in this document and in the information contained therein. Reproduction, use or disclosure to third parties without express authority is strictly fobidden.
F
E
D
C
B
8765432
A
1 109 11 12
G
H
1 2 3 4 5 6 7 8 9 10 11 12
A
B
C
D
E
F
G
H
DRAWING SHEET ISO 5457:1999-A2T
LAST REVISION
DESCRIPTION
MODIFICATO CODICE RIFERIMENTO SET - Changed P/N kit
REPLACED
REVISION
TOLLERANZE GENERALI SECONDO - GENERAL TOLERANCES ACCORDING TO ISO 2768
m
SCALE
NO
MATERIAL WEIGHT - kg
- - -
-
PROCESS PART NUMBER
- - 5COH046700
1/11
A
Development
NH-546
SHEETITERREVSTATUSDOCUMENT ID
ITABB-9AAE306693 ARCING HORN SET FOR CRS 52kV
RESPONSIBLE DEPARTMENT
ISTRUZIONI CRS
COMEM
TITLE / SUPPLEMENTARY TITLERESPONSIBLE COMPANY
Component Drawing-
PROJECT IDWORK ORDER IDBASED ON DOC IDDOCUMENT KINDAPPROVED ON
--Diego Boro
APPROVED BYREVIEWED BYCREATED BY
© COPYRIGHT ALL RIGHTS RESERVED

10
Montaggio sul cassone del trasformatore
Forare il cassone del trasformatore con un foro di
diametro D (vedi tabella 6, in appendice), assicurandosi
della perfetta planarità della supercie. Posizionare i
prigionieri (tabella 6) di ssaggio lungo una circonferenza
di diametro D0-D3 coassiale al foro (gura 1). Posizionare
la guarnizione fornita a corredo (gura 1).
L’isolatore passante deve essere quindi installato come
mostrato nella gura 2, applicando una coppia di serraggio
di 30 Nm (15 Nm nel caso di correnti nominali di 250/630
A) per ssare i dadi nella angia. Eseguire la messa a
terra installando il cavo dedicato tra la vite di terra e un
prigioniero (vedere gura 3). L’estremità del cavo con
occhiello da 5.3 mm deve essere ssata al collegamento
a terra tramite l’apposita vite. L’altra estremità (occhiello
da 13 mm) deve essere invece ssata ad un prigioniero
utilizzando una rondella ed un dado. Durante queste ope-
razioni vericare l’assenza di vernice o altro residuo sulle
superci di contatto.
Figura 3
Tabella 1
Corrente nominale [A] Coppia di serraggio suggerita [Nm]
250 12
630 20
1250 30
2000 55
3150 60
5000/6300 Viti sulla bandiera: 40
Estremità del cavo con
occhiello da 5,3 mm, vite
Estremità del cavo con occhiello
da 13 mm, rondella, dado Collegamento a terra
Vite di terra
Le connessioni elettriche possono essere realizzate solamente
da personale qualificator e preparato, formato sulle norme di
salute e sicurezza vigenti nel paese di riferimento. È necessario
curare le connessioni elettiche allo scopo di evitare fenomeni
di ionizzazione. Scegliere la sezione delle connessioni da
utilizzare e connetterle applicando le coppie raccomandate nella
tabella 1 in funzione della corrente nominale dell’isolatore.
ATTENZIONE
Corrente nominale (A) Coppia raccomandata [Nm]
250 12
630 20
1250 30
2000 55
3150 60
4500 75
6300 110
5000-8000 115
Tabella 2
Connessioni elettriche
Quando I fili sono connessi ad un terminale superiore (figura 7)
stringere il tirante con le coppie indicate in tabella 2. Assicurarsi
che le connessioni siano realizzate in maniera adeguata allo
scopo di evitare il surriscaldamento.
ATTENZIONE
Figura 4
Filetto del tirante Coppia raccomandata [Nm]
M10 25
M12 40
M16 90
Tabella 3
ISOLATORI COMBINATI RESINA-SILICONE CRS