Catalog for Transformer Explosion Prevention and Fire Extinguishing System

8/13/2019 Catalog for Transformer Explosion Prevention and Fire Extinguishing System

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INCREDIBLE SOLUTIONS

CTR MANUFACTURING INDUSTRIES LTD

CTR

TRANSF ORMER EXPLOSIO N PREVENTION AND

FIRE EXTINGUISHING SYSTEM


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l

l System can be installed on existing transformers at site with minimal outage period.

l System can be tested on energised transformers, unlike the other systems.

l Multi signal activation, eliminates possibility of mal-operation.

l Patented in over 80 countries.

l Low investment compared to other systems. l Minimal post-fire and no secondary damage.

l Low maintenance and running cost compared to other systems.

l Fool proof design to avoid ingress of nitrogen due to climatic changes into energised

transformer.

l Suitable for indoor, outdoor and unmanned substations.

l Models available to protect OLTC and cable box.

l Extinguishes external fire in bushing and/or radiator also.

l Back up provision ensures nitrogen injection for fail safe operation.

l Suitable for oil filled generator / furnace / rectifier / power transformers and reactors.

l Approved by leading transformer manufacturers and utilities worldwide.

On receipt of required activating signals, depressurizing commences by draining of a

predetermined quantity of oil. Simultaneously Nitrogen is injected under pressure at a pre-

detemined flow rate to create a stirring action thereby bringing the temperature of top oil surface

below ignition point. Additionally in case of external fire, it is extinguished within 30 seconds

maximum. Nitrogen gas occupies the space created by oil drain and acts as an insulating layer

between the top layer of oil in the transformer tank and oxygen in the atmosphere. TransformerConservator Isolation Valve blocks the passage of oil and isolates conservator oil thereby

preventing escalation of fire.

Reliable l Dedicated system l Saved over 5000 MVA of transformers from explosion

TYPICAL INSTALLATION

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Internal heavy faults result in short circuit and consequent imbalance of input and output current

leads to operation of differential relay. Faults lead to consequent oil surge / turbulance in the

transformer tank leading to operation of buchholz relay and/or Rapid pressure rise relay.

Immediate reduction of pressure is achieved by partially draining oil from the top of the

transformer tank. Conservator oil is isolated simultaneously due to operation of TCIV. The

drained oil is collected in the covered oil pit / tank. Refer to exhibit 1A.

TRANSFORMER CONSERVATOR ISOLATION VALVE (TCIV)

BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER

OPERATINGSIGNALSFROM

CONTROLROOM /RELAYPANEL

CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

CIVILWORK

DIFFERENTIALRELAY

BUCHHOLZ /OIL SURGE RELAY

RAPID PRESSURERISE RELAY

CONSERVATOR OIL ISOLATION BYTRANSFORMER CONSERVATOR

ISOLATION VALVE (TCIV)

OIL DRAIN

MASTER TRIP /HV+LV CB TRIP

NITROGENINJECTION

NITROGENINJECTION

RAPIDPRESSURERISE RELAY

(RPRR)

COVEREDOIL PIT/TANK

QUICK DEPRESSURISATIONVALVE ASSEMBLY

EXHIBIT 1A

AUTO EXPLOSION PREVENTION MODE

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AUTO EXTINCTION MODE

5

FIRE DETECTOR

OIL DRAIN


NITROGENINJECTION



RAPID PRESSURERISE RELAY

Simultaneous with oil drain, nitrogen gas is injected at a predetermined flow rate and pressure

from the bottom side valves of the transformer tank. Stirring action by the nitrogen gas of the

transformer oil reduces the temperature of the top layer of the oil eliminating the possibility of fire

on the top surface of the oil. Continuous nitrogen injection for upto 45 minutes cools the oil to

ambient temperature. Refer to exhibit 1B.

BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

OPERATINGSIGNALSFROMCONTROLROOM /RELAYPANEL

CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

TRANSFORMER

NITROGENINJECTION

RAPIDPRESSURE

RISE RELAY(RPRR)

COVEREDOIL PIT/TANK

CIVILWORK


EXHIBIT 1B


BUCHHOLZ /OIL SURGE RELAY


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EXHIBIT 2A

TYPICAL LOGIC 1

Upon receipt of system activation signals, immediate draining of top layer of oil in the transformer

tank commences, reducing any pressure in the transformer tank. The top layer of oil gets

drained and collected in a covered oil pit / tank. Refer to exhibit 2B.


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER


CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

NITROGENINJECTION

6

COVEREDOIL PIT/TANK


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER


CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

NITROGENINJECTION

System will also operate in case of bushing failure or transformer tank rupture. Since oil from

conservator will flow at an abnormal rate resulting in operation of TCIV, which isolates the

conservator oil preventing aggravation and spread of fire. Consequently buchholz relay operates

due to non availability of oil in the relay. Refer to exhibit 2A.

RAPIDPRESSURE

RISE RELAY(RPRR)

COVEREDOIL PIT/TANK

CIVILWORK

CIVILWORK


(RPRR)



EXHIBIT 2B


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EXHIBIT 2C


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN


CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

NITROGENINJECTION

TRANSFORMER

Simultaneous with oil drain, nitrogen gas is injected at a predetermined flow rate and pressure

from the bottom side valves of the transformer tank. Stirring action by the nitrogen gas of the

transformer oil reduces the temperature of the top layer of the oil extinguishing any fire on the top

surface of the oil. Continuous nitrogen injection for upto 45 minutes cools the oil to ambient

temperature. Refer to exhibit 2C.

COVEREDOIL PIT/TANK


(RPRR)

REMOTE MANUAL MODE

EXTINGUISHINGRELEASE SWITCH ON



OIL DRAIN


NITROGENINJECTION

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In case of an emergency, the system can also be operated in remote manual mode by breaking

the glass window provided on the control box and by turning on extinguishing release switch to

'ON' position.

CIVILWORK


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LOCAL MANUAL MODE

In case of an unlikely event of failure of power source, the system can be still be operated

manually from the cubicle.

OPERATE ANOTHER LEVERFOR NITROGEN INJECTION



OPERATE FIRST LEVER FOROIL DRAIN

8

FIRE DETECTOR

BUCHHOLZ RELAY


OIL DRAIN

NITROGENINJECTION


(RPRR) TRANSFORMER


CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

COVEREDOIL PIT/TANK

OLTC

TYPICAL LAYOUT OPTIONAL FOR OLTC PROTECTION


CIVILWORK


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TYPICAL LAYOUT FOR OPTIONAL CABLE BOX

FIRE DETECTOR

BUCHHOLZ RELAY


OIL DRAIN

NITROGENINJECTION


(RPRR) TRANSFORMER


CUBICLE

CONTROL

BOX

N2

N2 RELEASEDEVICE

COVEREDOIL PIT/TANK

QUICKDEPRESSURISATION

VALVE ASSEMBLY

Service engineers are available for supervision of system installation, commissioning

and training. CTR warranty is valid, if system is commissioned by CTR representative

authorised in writing. Worldwide representatives are available for spares and service.

Marketing enquiry questionnaire form PTFS 1005 should be entered completely for

prompt response and offering of most appropriate model. Operation and maintenance

manual is supplied in English language, unless specifically requested for otherwise.

Please also specify number of copies required both in digital and hard format and to

whom these should be delivered.

INSTALLATION AND COMMISSIONING

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CIVILWORK


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TESTIMONIALS

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SOME INTERNATIONAL PATENTS

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Depressurisation : Commences before static pressure build up and

consequent explosion

Fire Extinguishing period : Maximum 30 seconds from commencement of

N2 injection

0Fire detector heat : 141 C

sensing temperature

Transformer conservator : Settable for flow rate depending

isolation valve upon transformer and conservator pipe size.

Control Box : 110 V DC / 125V DC/220 V DC and 110 V AC/230 V AC

Cubicle : 110 V AC / 230 V AC

:Cubicle

Dimensions in mm

L B H

250 MVA and above 1600 600 1900 600

10 MVA to 249 MVA 1200 500 1900 500

2 MVA to 10 MVA 1200 500 1700 450

Below 2 MVA 1200 500 1200 350

Height includes 100 mm for Base

Control Box :Dimensions in mm

L B H

Electro-mechanical 500 320 700 45

PLC 500 320 700 40

PLC with mimic 500 320 700 40

PLC with SCADA 500 320 700 40

TECHNICAL HIGHLIGHTS

Transformer rating

Types Weight in Kgs

12

Weight in Kgs


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DMJ:fpPTFS.1005.D.0412.R2 TURNOVER

Conservator pipe angle :mmConservator pipe dia :

d

g

d=0

g=0

No

Type DType C

Yes

Dimension :

If yes : Arrangement

Builtin onload Tapchanger :

c

a

Type B

Type A

B =

Main Dimensions of tank :

CUSTOMER

PROTECTION

TRANSFORMER

/R

EACTOR

DETAILS

Oil temp.indicator trip1 Nr. NOpotential free

HV circuit breakers &LV circuit breakersignal, 1 Nr Each, NCpotential free

Restricted Earth

fault relay signal

1 Nr. No

potential free

1 Nr. NOpotential free

Buchholz Signal

125 V 110 V 48 V 24 V

230 V

230 V

110 V 50 Hz 60 Hz

110 V 50 Hz 60 Hz

Lts Oil Qty in Cable box : Lts

Trs. Sr. Nr. :

Voltage Ratio :

Top cover Drg Nr.:

(Enclosed)

Enquiry Ref :

Quantity :

Oil Qty in tank :

(Enclosed)

Rating : MVA/MVAR

G.A. Drg Nr. :

D.C. Supply available in Control Room :

A.C. Supply available near Transformer :

A.C. Supply available in Control Room :

Customer :

Work Order Nr/Tender Nr :

End User :

Manufacturer :

MK ENQUIRY QUESTIONAIRE FORM

SR.NR.

POONA

CTR FIRE SYSTEMS DIVISION

"

Cuthere

Oil Qty in Conservator :

Confirm availability of spare contacts in relay panel :Differentialrelay signal1 Nr. NOpotential free

Winding temp.indicator trip1 Nr. NOpotential free

Master relay(86) Trip1 Nr. NOpotential free

If numeric relay for Differential relay :

Remarks :

Self reset Manual reset

H =

a =

c =

mm

mm

mm

mm

B L

H

H

B L

d =

g =

mm

mm

Degree

L = mm

OLTC oil surgerelay trip1 Nr. NOpotential free

Rapid Pressurerise relay signal1 Nr. NOpotential free

13

Lts

Tank

Cable box

Tank

Cable box

Tank

Cable box

Tank

Cable box

Tank Cable box Tank Cable box

TRANSFORMER

/REACTOR

DETAILS

220 V


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Arrangement of Bushing :

a) HV

LV

TV

others

HV

LV

TV

others

HV

LV

TV

others

p p

b) c)

p = mm p = mm

d)

p

HV

LV

TV

others

e)

p

HV

LV

TV

othersp = mm p = mm

f)

p

p = mm

HV

LV

TV

others

g) HV

LV

TV

others

HV

LV

TV

others

h)

Cooling details :if OF type, NR. OF PUMPS :

KW/HP :

HEAD :

FLOW :

Installation : New Post

Dist. from Trs. to Control Room through Cable Trench :

Dist. from Relay panel to Control Room through Cable Trench : mtrs

Valve Schedule Drawing to be attached : Drg. Nr :

Availability of valves :

Between Conservator and Buchholz Relay :

Between Buchhloz Relay and Transformer :

** If valve not available enclose detailed pipe drawing for Tank and conservator along with buchholzvalve flange details.

Available

Available

Not Available

Not Available

**

**

Oil pit/tank :Available Not Available Dist from Trs : mtrs

Capacity : LtsDimensions ( L X B X D ) mm :

mmSize of pipe connecting Trs. to Oil pit :

Site Details :

Sub-station layout drawing to be attached

Sub-station foundation drawing to be attached

Sub-station cable trench drawing to be attached

Drg. Nr.

Drg. Nr.

Drg. Nr.

Manuals : Nrs. Language : English Other ............

Packing : Export Domestic

Instructions required for packing :

NAME :

DESIGNATION :

FOR CTR USE Quotation Nr. :

SIGNATURE :

DATE :

STAMP

OR

SEAL

PTFS.1005.D.0412.R2

DMJ:fp

GENERAL

INSTALLATION

TRANSFORMER

/REACTOR

DETAIL

S

mtrs

14

Tank Cable box

Tank Cable box

Tank Cable box

Tank Cable box

**

**

Qty


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CTR : System : Cubicle

: Control box

: Transformer conservator

isolation valve (TCIV)

: Required number of fire

detectors

: Signal box

Other : Fire survival cable

: Fire resistant low smoke

(FRLS) cables

: Pipe connections between

Transformer and Cubicle

: Pipe connections between

cubicle and oil pit

TRANSFORMER On transformer : Oil drain opening.

MANUFACTURER / : Nitrogen injection openings

BUYER : : Brackets for Fire detector

fixing

: TCIV fixing arrangement.

: Signal box fixing

arrangement.

USER : Other : Civil work for cubicle.

: Civil work for piping.

: Civil work for Oil pit / Oil gas

separation Tank.

: Oil gas separation tank (optional)

: Potential free contacts in relay

panel.

: Power supply.

: Oil for topping up transformer.

# Rights reserved to amend design data without prior notification.

SCOPE OF SUPPLY / WORK

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FIRE SYSTEMS DIVISIONCTR MANUFACTURING INDUSTRIES LTD

NAGAR ROAD, PUNE 411014, INDIA.

PHONE : 91 20 26633402/3/4/5. FAX : 91 20 26633425

[email protected] / [email protected]

CTR Pune

PM FS.1005

APRIL 2013

CTR

WORLDWIDE MARKETING NETWORK

CTR Pune

INSTALLATIONS

INDIA

ECUADOR

Documents

Catalog for Transformer Explosion Prevention and Fire Extinguishing System