ctr-transformer explosion prevention and fire extinguishing system

INCREDIBLE SOLUTIONS

CTR MANUFACTURING INDUSTRIES LTD

CTR

TRANSFORMER EXPLOSION PREVENTION AND FIRE EXTINGUISHING SYSTEM

FOR TRANSFORMER TANK PROTECTION

FOR HIGHER RATING TRANSFORMER TANK PROTECTION WITH PLC, MIMIC AND SCADA

FOR TRANSFORMER TANK, OLTC / CABLE BOX PROTECTION

l Reliable Dedicated system Saved over 4000 MVA of transformers from explosion

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

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

Multi signal activation, eliminates possibility of mal-operation Patented in over 80 countries.

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

Low maintenance and running cost compared to other systems.

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

Suitable for indoor,outdoor and unmanned substations. Models available to protect OLTC and cable box. Extinguishes external fire in bushing and/or radiator also.

Back up provision ensures nitrogen injection for fail safe operation.

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

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 fire, extinguishes 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. Transformer Conservator Isolation Valve blocks the passage of oil and isolates conservator oil thereby preventing escalation of fire.

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TYPICAL INSTALLATION

Iecomposition of oil due to arcing

oil surge / turbulance in Rapid

pressure rise relay

is achieved

nternal arcing results in insulation failure and consequent imbalance of input and output currents

leading to operation of differential relay. D results in generation

of gases and consequent transformer tank leading to operation of

and/or buchholz relay and / or pressure release valve (PRV). Immediate

reduction of pressure by partially draining oil from the top side of transformer tank.

Conservator oil is isolated simultaneously due to operation of TCIV. The drained oil is collected in

TRANSFORMER CONSERVATOR ISOLATION VALVE (TCIV)

BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER

OPERATINGSIGNALSFROMCONTROLROOM /RELAYPANEL

CUBICLE

CONTROLBOX

N2

N2 RELEASEDEVICE

PRESSURE RELIEF VALVE(PRV)

CIVIL WORK

DIFFERENTIAL RELAY

BUCHHOLZ / OIL SURGE RELAY

PRESSURE RELIEF VALVE

RAPID PRESSURE RISE RELAY

CONSERVATOR OIL ISOLATION BY TRANSFORMER CONSERVATOR

ISOLATION VALVE (TCIV)OIL DRAIN

MASTER TRIP / HV+LV CB TRIP

NITROGEN INJECTION

NITROGENINJECTION

RAPIDPRESSURERISE RELAY

(RPRR)

COVEREDOIL PIT/TANK

QUICK DEPRESSURISATION VALVE ASSEMBLY

EXHIBIT 1A

AUTO EXPLOSION PREVENTION MODE

AUTO EXTINCTION MODE

5

FIRE DETECTOR

BUCHHOLZ /OIL SURGE RELAY

OIL DRAIN


NITROGEN INJECTION

CONSERVATOR OIL ISOLATION BY TRANSFORMER CONSERVATOR

ISOLATION VALVE (TCIV)

PRESSURE RELIEF VALVE

RAPID PRESSURE RISE RELAY

Simultaneous with oil drain injection of nitrogen gas 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


CUBICLE

CONTROLBOX

N2

N2 RELEASEDEVICE


TRANSFORMER

NITROGENINJECTION


(RPRR)

COVEREDOIL PIT/TANK

CIVIL WORK


EXHIBIT 1B


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 p ressure in the transformer tank, the t op layer of oil being drained and collected in a covered oil pit / tank . Refer to exhibit 2B.


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER


CUBICLE

CONTROLBOX

N2

N2 RELEASEDEVICE


NITROGENINJECTION

COVEREDOIL PIT/TANK


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN

TRANSFORMER


CUBICLE

CONTROLBOX

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.


(RPRR)

COVEREDOIL PIT/TANK

CIVIL WORK

CIVIL WORK


(RPRR)



EXHIBIT 2B

EXHIBIT 2C


BUCHHOLZ RELAY

FIRE DETECTOR

OIL DRAIN


CUBICLE

CONTROLBOX

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

EXTINGUISHING RELEASE SWITCH ON

CONSERVATOR OIL ISOLATION BY TRANSFORMER CONSERVATOR ISOLATION

VALVE (TCIV)

OIL DRAIN


NITROGEN INJECTION


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.

CIVIL WORK

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 LEVER FOR NITROGEN INJECTION

CONSERVATOR OIL ISOLATION BY TRANSFORMER CONSERVATOR ISOLATION

VALVE (TCIV)

OPERATE FIRST LEVER FOR OIL DRAIN

FIRE DETECTORBUCHHOLZ RELAY


OIL DRAIN

NITROGENINJECTION


(RPRR)TRANSFORMER


CUBICLE

CONTROLBOX

N2

N2 RELEASEDEVICE

COVEREDOIL PIT/TANK


OLTC

TYPICAL LAYOUT OPTIONAL FOR OLTC PROTECTION


CIVIL WORK

TYPICAL LAYOUT FOR OPTIONAL CABLE BOX

FIRE DETECTORBUCHHOLZ RELAY


OIL DRAIN

NITROGENINJECTION


(RPRR) TRANSFORMER


CUBICLE

CONTROLBOX

N2N2

N2 RELEASEDEVICE

COVEREDOIL PIT/TANK


QUICK DEPRESSURISATIONVALVE 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

CIVIL WORK

TESTIMONIALS

SOME INTERNATIONAL PATENTS

Depressurisation : Commences before pressure build up and

consequent explosion

Fire Extinguishing period : Maximum 30 seconds from commencement of

N2 injection

Fire detector heat : 141 C

sensing temperature

Transformer conservator : Settable between 60 and 100 litre per minute,

isolation valve depending upon transformer and conservator 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

0

TECHNICAL HIGHLIGHTS

Transformer rating

Types Weight in Kgs

Weight in Kgs

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

Conservator pipe angle :mmConservator pipe dia :

dg

d=0g=0

No

Type DType C

Yes

Dimension :

If yes : Arrangement

Builtin onload Tapchanger :

ca

Type B

Type A

B =

Main Dimensions of tank :

Oil temp.indicator trip1 Nr. NOpotential free

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

Restricted Earthfault relay trip1 Nr. Nopotential free

1 Nr. NO potential free

Buchholz TripPRV Trip

125 V 110 V 48 V 24 V

230 V230 V

110 V 50 Hz 60 Hz110 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/MVARG.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 FORMSR.NR.

POONACTR FIRE SYSTEMS DIVISION

Oil Qty in Conservator :

Confirm availability of spare contacts in relay panel :Differentialrelay trip1 Nr. NOpotential free

1 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 trip1 Nr. NOpotential free

Lts

Tank

Cable box

Tank

Cable box

Tank

Cable box

Tank

Cable box

Tank

Cable box

Tank Cable box Tank Cable box

220 V

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 attachedSub-station foundation drawing to be attachedSub-station cable trence drawing to be attached

Drg. Nr.Drg. Nr.Drg. Nr.

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

Packing : Export DomesticInstructions required for packing :

NAME :

DESIGNATION :

FOR CTR USE Quotation Nr. :

SIGNATURE :

DATE :

STAMPORSEAL

PTFS.1005.D.0412.R2DMJ:fp

mtrs

Tank Cable box

Tank Cable box

Tank Cable box

Tank Cable box**

**

Qty

CTR : System : Cubicle /

Depressurisation Equipment

: 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 plinth for

Cubicle and supports. Oil pit/OGST

: Potential free contacts in relay

panel.

: Power supply.

: Topping up of transformer oil if

SCOPE OF SUPPLY / WORK

FIRE SYSTEMS DIVISION CTR MANUFACTURING INDUSTRIES LTD

NAGAR ROAD, PUNE 411014, INDIA.

PHONE : 91 20 26633402/3/4/5. FAX : 91 20 [email protected] / [email protected]

CTR Pune

PM FS.1005APRIL 2012

CTR

WORLDWIDE MARKETING NETWORK AND INSTALLATIONS

CTR Pune

INSTALLATIONS

INDIA

ECUADOR