a.             

BRAND

Indicate

HEMG

b.             

ORIGIN

Indicate

CHINA

c.             

Year of production

No earlier than 2019

2019

d.        

MANUFACTURING STANDARDS TO COMPLY

IEC 60076

Power Transformers

IEEE Std C57.12.10 - 2010

IEEE Standard Requirements for Liquid Immersed Power Transformers-

IEEE C57.12.90

Standard Test Code for Liquid-Immersed Distribution, Power and Regulating Transformers

IEC 60137       

Bushing for alternating voltages above 1000 V

IEC 60214       

On-Load Tap-Changers

IEC 60044-1

Current transformers

IEC 60099-4

Surge arresters

IEC 60529

Stabilized Power Supplies, DC Output

YES,COMPLY

e.        

e.       TRANSFORMER FEATURES

E.1

Number of phases

3

3

E.2

Frequency

60 Hz

60HZ

E.3

Voltage High Voltage AT (H winding)

46 kV

46KV

E.4

Voltage (1) Nominal MT Medium Voltage (X winding)

23 kV

23KV

E.5

Voltage (2) Medium Voltage nominal MT (X winding)

6.3 kV

6.3KV

e.6

Maximum operating voltage phase-phase, system 46 kV, 15%

52.9 kV

52.9KV

e.7

Maximum operating voltage phase-phase, system 23 kV, 15%

26.45 kV

26.45KV

e.8

Maximum operating voltage phase-phase system 6.3 kV, 15%

7,25 kV

7.25KV

e.9

Type earthing system

Multigrounded

Multigrounded

e.10

Operation of power transformer

The processor may operate continuously 46/23 kV or 46 / 6.3 kV with a power of 15 MVA in any combination.

46/23kv-15mva,

46kv/6.3kv-15mva

e.11

internal insulation

Nominal System Voltage RMS

Basic Insulation Level (BIL), CREST [kV], wave 1.2 / 50 microseconds [kV]

6.3 kV

95

95kv

23 kV

150

150kv

46 kV

250

250kv

e.12

external insulation

Nominal System Voltage RMS

Basic Insulation Level (BIL), CREST [kV], wave 1.2 / 50 microseconds [kV]

6.3 kV

125

125kv

23 kV

200

200kv

46 kV

325

325kv

Features trasformador (step down transformer)

Operating conditions

46 / 23-6.3 kV

46/23-6.3kv

e.13

cooling rated capacity with full capacity

OFAF of 46/23 to 6.3 kV type (NOT other cooling system is supported)

15 MVA

OFAF OF 46.23K TO 6.3KV-15MVA

e.14

Temperature rise of the windings at an ambient temperature of 30 ° C

Less than or equal to

60 ° C

60

hottest spot (hot spot)

78 ° C

78

AT connection

DELTA

DELTA

MT connection

STAR (Grounded Wye)

STAR(GROUNDED WYE)

Connection Group 46/23 - 6.3 kV

DYN1

DYN1

Selector 23 to 6.3 kV

E.15

Number of Positions

Must have two positions, one for 23kV and the other to 6.3 kV, plate not use switching is accepted, must be by a selector with external control.

ONE EXTERNAL CONTROL  TO SELECT 2 POSIGION FOR 23KV OR 6,3KV

E.16

Ground insulation level

It must be in the ability to withstand oscillating voltages and transferred result waves 1.2 / 50 microseconds (BIL) both connection 23 kV, and the 6.3 kV and ground insulation must be ≥ 350 kV (BIL).

GROUND INSULATION LEBEL BIL 350KV/(1.2/50MS) FOR 23KV AND 6.3KV AND GROUND INSULATION

E.17

Level of isolation between adjacent contacts

It must be in the ability to withstand oscillating voltages and transferred result waves 1.2 / 50 microseconds (BIL) both connection 23 kV, and the 6.3 kV and isolation between contacts must be ≥ 250 kV (BIL).

ISOLATIONG BETWEEN ADJACENT CONTACTS BIL 250KV/(1.2/50MS) FOR 23KV ,6.3KV AND ISOLATION CONTACTS

E.18

Signals to the hub

Positions 1 and 2 of the selector 23 to 6.3 kV must reach a controller where all parameters or signals that can be controlled transformer concentrate, and this should take their parameters and signals to a hub signals via protocol IEC 61850.

SEL

f.        WORKING CONDITIONS

F.1

Mounting height

3000m

3000M

F.2

Variation range of room temperature

It should operate in a range of 0 ° C to 40 ° C

0 ° C to 40 ° C

F.3

Wiring and auxiliary equipment

Tropicalizado for fungi and parasitic plants

YES

F.4

heating

Heaters in each of the boards on which equipment is installed risk of deterioration by moisture such as relays, terminal blocks, auxiliary contacts, etc.

YES

F.5

Degree of protection cubicles

IP 55

IP55

F.6

Degree of seismicity

0.5 g

0.5G

F.7

Installation

Exterior

OUTDOOR

f.8

Number of Bushing

High Voltage AT

3

3

Medium Voltage MT

4 (including the Neutral to 23-6.3 kV)

4

F.9

The positive sequence impedance reference temperature of 15 MVA, 350 kV BIL, 46 kV, and 75 ° C in center tap and the tap between the ends

≤8%

7.99%

F.10

Tap changer to be installed in high voltage windings (H windings) to 46 kV.

OLTC load tap changer ± 8 steps (1.875% each step), arc extinguishing vacuum insulation ground contacts wave 1.2 / 50 [BIL] least 350 kV.

V2CIII/HM

F.11

transformer type

Step down

SETP DOWN

Oil immersed

OIL IMMERSED

Suitable for outdoor installation.

SUITABLE FOR OUTDOOR

a.        

g.       Rising temperatures, above ambient temperature of 30 ° C

G.1

Oil temperature

According to applicable standards (state value and standard).

≤55ºC/IEC

G.2

Hottest point temperature oil (hot spot)

According to applicable standards (state value and standard).

≤65ºC/IEC

G.3

Winding temperature

According to applicable standards (state value and standard).

≤65ºC/IEC

G.4

hottest spot winding temperature (hot spot)

According to applicable standards (state value and standard).

≤75ºC/IEC

h.       LOSSES

H.1

Lost uncharged (core) 100% of rated voltage

< 15 kW

 Mandatory annex preliminary calculation

≤15KW

H.2

Load losses (copper) AT nominal position to power OFAF (15 MVA) at 75 ° C

46/23 kV

<72 kW

Mandatory annex preliminary calculation

≤72KW

H.3

Losses in rated load position (Copper), 15 MVA (OFAF), 75 ° C

46 / 6.3kV

<76 kW

Mandatory annex preliminary calculation

≤76KW

h.4

Impedance transformer to power OFAF (15 MVA) AT nominal position to 75 ° C

<8%

Mandatory annex preliminary calculation

≤8%

i.         BUSHINGS OFFERED

i.1

High voltage side 46 kV

Brand and product code

BFSD72.5-630ª/XND

i.2

Low voltage side 23 kV (these installations are used bushing at 6.3 kV)

Brand and product code (phases)

BFSD24-2500A/XND

Brand and product code (neutral)

BFSD24KV-2500A/XND

j.         DIELECTRIC OF A FREQUENCY INDUSTRIAL BUSHING (BIL levels requested and considered correct height to 3000 m)

J.1

High voltage side 46 kV

350 kV

350

J.2

Low voltage side 23 kV

250 kV

250

k.        ADDITIONAL FEATURES OF THE TRANSFORMER BUSHING

k.1

Material bushings AT and BT

autolimpiable hydrophobic polymer

AUTOLIMPIABLE HYDROPHOTIC POLYMER

k.2

minimum distance between phases 46 [kV]

630 mm

1813MM

k.3

minimum distance between phases 23 [kV]

380 mm

600MM

k.4

Type bushings

Condenser type (for 46 kV) insulation class E type for AT and BT.

RIP/E-CLASS

RIP (resin- impregnated paper)

RIP

IEC 60137, IEC 60071-2

IEC60137.IEC60071-2

K.5

AT degree of pollution and BT

TYPE III

TYPE III

K.6

Terminals supply 46 kV

For copper and aluminum wire

MCM 600-1000; IEC 60273

MCM600-1000,IEC60273

K.7

Terminals supply 23 kV - 6.3 kV

For copper and aluminum conductors 2 phase,

MCM 500-1000; IEC 60273

MCM500-1000,IEC60273

K.8

Neutral Terminal Supply

For copper and aluminum wire

Caliber as recommended factory

MCM500-1999,IEC60273

l.         Load Tap Changer OLTC

L.1

Load tap changer

Brand and product code

V2CIII.HM

l.2

Certificate of Compliance IEC 60214

append certificate

IEC60214

l.3

Location of OLTC

Side of 46 [kV]

60KV SIDE

L.4

Switching technology

in vacuo

VACUUM

l.5

Rated voltage regulation

8 steps of 1.875% w / u

+8X1.875%

L.6

Regulation under the nominal voltage

8 steps of 1.875% w / u

-8X1.875%

L.7

Location exchanger taps

Internal to the main transformer Cuba

YES

L.8

Step voltage supported

Indicate - V

862.5V

L.9

BIL complete isolation level OLTC

350 kV

350KV

L.10

Switch Type

Three phase

L.11

Overload capacity

Up to 10% of the nominal power, for times> 2 hours at c / or positions, being maximum or minimum voltage duration range.

10%

L.12

It allows manual operation

YES

YES

I.13

Location of the operating lever

Height of 1.10 meters from the base of the transformer, must have locking attachments installing locks or other securities.

YES

l.14

Protection

Protection load tap changer must be made with a flow relay, installed between the changer and the oil conservator. The relay flow test device must have clear visual indication and remote operation. The flow relay must be connected to the trip circuit of the transformer. His position will be sent via IEC 61850 protocol, the hub of signals.

QJ4  RELAY

L.15

Oil level indicator

The level indicator oil must provide an alarm signal if the level is below the threshold to a controller where all parameters or signals that can be controlled transformer concentrate, and this should take their parameters and signals to a hub signals via IEC 61850 protocol.

MT-160SK/MESSKO

L.16

Operation Counter

It shall indicate the accumulated number of operations performed.

500000

L.17

Position indicator

Position indicator must be sent a signal to the relay voltage regulation, which will record this information and take its parameters and signals to a hub signals via IEC 61850 protocol.

REG-D/a-Eberle

L.18

Selection Switch operation

Manual - Off - Auto - Remote

Yes

L.19

regulator voltage relay

(Voltage Sensitive Device), for automatic control of the operation exchanger taps under load. This device must be adjustable between 60 and 130 VAC.

REG-D/a-eberle

The power supply equipment will be 125 VDC.

125vdc

The relay will come protected against transient surges that can damage the relay or its internal programming.

yes

It must be of the digital type, LCD type and resources to enable easy identification of the mode of operation and current position. The indications on the screen must be presented in Spanish.

In spenish

Should be available in the controller itself, a key type "LOCAL" / "REMOTE" to enable remote commands are prevented when local operation. It must be provided a potential free contact for remote signal from the key position, either as a digital input to change its status.

yes

It should be available in the controller itself, a key type "AUTO" / "MANUAL". It must be provided a potential free contact for remote signal from the key position, either as a digital input to change its status.

yes

The voltage regulator should allow to choose the type of position signal takes between corona resistance, analog signal (4-20 mA) and BCD, which will be chosen in accordance with the convenience of installation in each application.

yes

The voltage regulator should be allowed to choose the type of remote communication protocol IEC 61850 communication must be available via the RS-232 interface and / or USB.

The regulator must comply with all requirements of IEC 61850.

The controller box should be metallic, with available land connection and minimum degree of protection IP54 (in accordance with IEC 60529 standard).

Compensating module voltage drop on the line (line-drop-compensator), with resistance elements and adjustable reactance that allow compensation voltage drop caused by the charging current.

yes

It shall provide the module with the hardware needed for parallel operation of voltage control equipment installed in a similar transformer by the methods of master-follower and circulating currents.

yes

Time delay relay to allow an adjustment range from 0 sec to 300 sec in the operation load tap exchanger in both directions, both lift and voltage reduction.

yes

Conductors and terminal blocks (terminal blocks) that are required. should be assigned an additional 10% of terminal blocks.

yes

Cubicles needed to accommodate all instruments and control devices, protection or basic elements of load tap exchanger.

yes

The control cubicle must have heaters, controlled by thermometer and hygrometer, to prevent condensation of moisture on the instruments and interior lighting.

yes

It must have a device to calibrate and regulate the voltage for values of bandwidth from 0.5%.

yes

Low Voltage Lock

yes

Overcurrent blocking

yes

Automatic acceleration over voltage

yes

m.     COOLING SYSTEM

M.1

Cooling the OFAF be redundant (forced oil and forced air) and type pumps.

Control transformer cooling system must be done by electronic device microprocessor, said control system must ensure proper working temperature of the oil, so that the cooling does not operate with temperatures below 30 degrees.

Expected logic operation should contemplate the percentage of rated power provided as a reserve. The manufacturer must provide type tests, checking in accordance with the following standards: IEC 61000, IEC 60068.

yes

m.2

Pumps should be flowmeter and be separated by reels expansion main line and their respective control valves by flanges.

Pumps must be able to withstand reinforced continuous transport and mechanical stresses of operation once the cooling system is fully assembled

yes

n.       Heat exchanger

n.1

Exchanger capacity

The heat exchanger must be able to maintain temperatures within the limits defined over an additional 20% booking dirt or clogging in the cooling body.

yes

n.2

Alarm and protection

Exchangers must have alarms and overload protection.

The operation of these elements must be manually and automatically by action of thermometers, both temperature measuring oil as windings and the transformer must be provided with all necessary control elements in different conditions or states transformer cooling, they must have free auxiliary contacts for monitoring signals from the hub.

yes

o.       MATERIALS AND FINISHES

o.1

Cuba and expansion tank

ASTM A283 steel conforming

O.2

Operating pressures

> 25% at maximum pressure operation resulting oil preservation system used.

Yes

O.3

Test protocol

As stated in dd.4 tests.

yes

o.4

positive and negative maximum pressures

Indicate name plate

98Mpa(positive)max

133Mpa(negative)max

O.5

Isolation valves (expansion tank)

Indicate

DIN25/3PCS

O.6

consistent with the type of welding grade steel

Accordance with ASME Section 8, free of burrs and corrosive substances.

YES

O.7

Access bushing connections, CTs, OLTC, etc.

Manholes and handholes

YES

O.8

Accommodation packages

The surfaces where the packaging is placed must be machined smooth and flat and have sufficient rigidity to ensure adequate compression of the gaskets.

YES

O.9

Guides inside the tank

Guides must be provided in the tank to facilitate movement of the core and the windings when these are introduced or taken out of the tank.

YES

O.10

Studs welded to the tank grounding

3 (three) as follows:

2 (two) in the base of the walls of the main tank diagonally opposite sides; 1 (one) on deck or main tank walls near the neutral bushing.

YES

You must accommodate a range between 2/0 AWG gauge driver 300 MCM.

YES

O.11

Cuba base

It is made of steel beams welded to the tank bottom. The base will have a minimum of four (4) points of support for cats (jacks), strong enough to raise the fully assembled and oil filled transformer.

YES

o.12

Cuba top cover

Should be subject only to bolts, welding is not supported.

YES

o.13

Tank integrity

Should remove any drilling or hole on the wall or tank cover. The offeror must fix or support accessories without drilling.

YES

o.14

Parts exposed to water accumulation

It is required by design to prevent the accumulation of water in the tank cover, in all caps and surfaces of the boards, and conservative changer tank.

YES

o.15

windings

Copper

Able to withstand dielectric tests specified in the rating.

YES

o.16

Winding insulation

Class E 120 ° C

CLASS E120ºC

o.17

Nucleus

Type grain oriented sheet should be of high quality.

GRAIN ORIENTED SHEET

o.18

Core insulation

Class B 130 ° C

B130ºC

O.19

Insulation paper

Heat stabilized ANSI / IEEE C57.100

ANSI/IEEE C57.100

O.20

Noise levels

According to NEMA Standards Publication No. standard 1-993 (R2000).

75DB

o.21

Descriptive characteristics of the core

Without deformation resistance

Short efforts, maneuvers, operation and transportation. In any case cause deformation.

YES

Displacement of core laminations

Avoid travel by transportation, handling, operation, etc.

YES

O.22

Connection of the core

column type and structure.

Grounded at a single point by easily accessible external connection, to check the insulation core.

YES

o.23

Ground connection removed

Without oil

> 200 MW 1000 V DC to a moisture content of <70%

YES

With oil

> 200 MW 2000 V DC

YES

o.24

Cutting burr mill

<0.025 mm

YES

O.25

Ability to withstand short circuit

Specify the level of short circuit that can withstand the transformer AT and MT.

YES

o.26

Thickness of the outer paint

> 140 microns

160MICRONS

O.27

wood used

IEC 61061

IEC61061

o.28

Core-drying process Coils

VAPOR PHASE

YES

o.29

Degree of Polymerization

> 1050 units

1100

IEC 450

IEC

o.30

Control cables

Flexible soft copper K class, XLPE insulated, flame retardant, exceeding 14 AWG, operating temperature 105 ° C. The connections must be made on terminal blocks.

YES

o.31

Cable Labeling

Bidirectional according to the wiring sheets and delivered flat.

YES

o.32

external wiring

Rigid pipe must be used to wire all control signals and protection, supervision and communication transformer to the control board and flexible metal shell only for the arrival of drivers to accessories. The tubes were manufactured from galvanized steel ASTM A-653, A-527 ASTM standards.

YES

p.       Conveyors, MOBILIZATION AND ANCHOR TRANSFORMER

p.1

To raise the transformer

With the main tank should provide hooks or other attachments that allow lifting both the main tank and the transformer, fully armed and with oil.

The surfaces of these additions must be free of sharp terminals that could damage the cables or ropes used.

YES

p.2

Mobilization transformer

This base should be designed to suit engineering manufacturer in order that the transformer ready for transport, with oil or oil being the center of gravity does not fall outside the base when an inclination of the transformer 15 degrees is made with to the horizontal.

The mobile substation must be designed for movement on the roads of Ecuador, so the maximum degree of vibration is indicated support and the trailer must be designed to absorb this vibration, without decreasing the useful life of equipment.

The allowable speed of the mobile substation will be to circulate at 40 [km / h] pavement, for which it must be defined in the detailed engineering elements to avoid vibration or movements that cause damage to the transformer life.

YES

p.3

anchoring

The transformer must be anchored to the platform, it must be supplied with your system antisísmico anchor (Anti-Earthquake Clamping Device), the supplier shall establish as a method of calculating the guidelines established by the IEEE 693-2005 standard, with a level of qualification seismic 0.5g (Moderate). The contractor must provide planes with details of anchors and mechanical stresses to be considered in detail by manufacturing, which justifies the transformer unit and platform not suffer slipping and vibration is minimized motion.

YES

p.4

BARRIERS

The entire substation will have guardrails for circulation, the same as serve as protection and difficult access to computers when they are energized.

YES

q.       REFRIGERATION

Q.1

Kind

OFAF heat exchanger type (Oil Forced Air Forced).

YES

Microprocessor controlled electronic device which ensures operating temperatures <30 ° C.

YES

r.        ASSOCIATED WITH FANS COOLING SYSTEM

r.1

Operation

Exchanger fans must be within the noise limits transformer; Three-phase voltage supply must be 210/121 volts.

YES

R.2

Protection

Fans must have alarms and overload protection, independent.

YES

R.3

Functioning

The operation of these elements must be manually and automatically by action of thermometers, both temperature measuring oil as windings and the transformer must be provided with all necessary control elements in different conditions or states transformer cooling, they must have free auxiliary contacts from the SCADA monitoring and / or control center EEQ.

YES

R.4

start

It is required to start by two steps by means of auxiliary relays to be installed to prevent multiple motors to start simultaneously.

YES

s.        THERMOMETER OIL TEMPERATURE MEASUREMENTS

S.1

Oil thermometer (OTI)

Brand and code

MT-160SK.EMSSKO

S.2

Degree of protection

IP55

IP55

S.3

MPE

+/- 2 ° C

(+/-2ºC0

S.4

Rank

0-120 ° C

0-120

S.5

sensitive element

The sensitive element of the thermometer (temperature sensitive bulb) must be located at the top of the tank, at the site where the maximum temperature of the oil is obtained.

YES

s.6

Measuring principle

The principle of temperature measurement should be done by Bourdon type system, with a capillary installed in a thermowell 1 ".

YES

s.7

Thermometer Microswitchs

The meter of oil temperature (OTI) should have a transmission system of the type temperature organic liquid pressure (Organic liquid filled pressure system), with adjustable microswitches contact ungrounded (contacts nongrounded), these will be used in the following purposes:

Contact 1. Start of stage I of fans, adjustable between 65 degrees Celsius and 90 degrees Celsius.

Contact 2. Start stage II of fans, adjustable between 65 degrees Celsius and 90 degrees Celsius.

3. Contact alarm signal on oil temperature, adjustable between 85 degrees Celsius and 115 degrees Celsius.

Contact 4. Alarm signal and power circuit breaker tripping, adjustable between 95 degrees Celsius and 115 degrees Celsius.

YES

s.8

Additional transmission of temperature value

The meter of oil temperature (OTI) must have an additional transmission system temperature value to a controller and this should send information via IEC 61850, a switch communications to be sent to central control EEQ and / or SCADA.

YES

t.        MEASURING SYSTEM OF TEMPERATURE WINDING

T.1

Thermometer windings (WTI)

Brand and code

MT-160STK/MESSKO

T.2

Degree of protection

IP55

IP55

T.3

MPE

+/- 2 ° C

+/- 2 ° C

t.4

Rank

0-120 ° C

0-120 ° C

T.5

Measurement type

thermal imaging, located in a phase of one of the windings.

YES

T.6

Thermometer Microswitchs

It must have four sets of the type microswitch contacts, ungrounded (nongrounded), which will be used for the following purposes.

Contact 1. Start of the first stage fan, adjustable between 65 degrees Celsius and 90 degrees Celsius.

Contact 2. Start the second stage fans, adjustable between 75 degrees Celsius and 105 degrees Celsius.

Contact 3. alarm signal on winding temperature, adjustable between 90 degrees Celsius and 140 degrees Celsius.

Contact 4. Alarm signal and power circuit breaker tripping, adjustable between 95 degrees Celsius and 140 degrees Celsius.

YES

t.7

Contacts Thermometer

Oil indicator (OTI) as the winding temperature indication (WTI), for different applications must be factory calibrated.

YES

T.8

Additional transmission of temperature value

The temperature gauge windings (WTI) must have an additional transmission system temperature value to a controller and this should send information via IEC 61850 protocol.

YES

u.       PRESSURE RELIEF DEVICE

u.1

Pressure relief valve

Brand and code

MPREC/MESSKO

u.2

In case of overpressure

a tubular system is included to drive the oil.

YES

u.3

Activation time

<2ms

YES

u.4

Signal transmission

This device signals will be entered signal to a hub where all mechanical transformer protection focus, and this information should be sent via IEC 61850 protocol.

YES

u.5

Safety valve

Cover involving the entire valve, avoiding interference climate and does not interfere with viewing semaphore or flag.

YES

You must have at least 4 contacts for alarm, and connection must be in junction box with IP-65 grade.

 PRESERVATION OF OIL SYSTEM

v.       SYSTEM EXPANSION TANK OR CONSERVATIVE

v.1

Pressure support

Equipment preservation oil must withstand a pressure of absolute vacuum at sea level or an internal pressure of 103 kPa for 24 hours, without permanent deformation.

YES

v.2

Expansion tank accessories

It must additionally include the following:

•      A valve for filter placed on top.

•      A valve serves to sampling, filtering and drained total positioned at the bottom.

•      It must have equalization valve between the diaphragm synthetic rubber and the expansion tank.

•      A connecting pipe between the main tank and the conservator tank to couple Buchholz relay.

•      A magnetic oil level indicator.

•      A record that allows cleaning and inspection inside the conservator tank.

•      To prevent oil contact with the atmosphere, it should be provided a system diaphragm seal synthetic rubber resistant to oil in the conservator tank (elastic bag).

•      It must have a vent or air dryer silicagel (Dehydrating Breather), they will not be accepted devices using silica gel with cobalt content and must be maintenance free.

YES

w.      ACCESSORIES

w.1

Valves Cuba, exchanger, expansion tank, OLTC

Bronze or brass and flanged connection

W.2

Level indicator transformer oil

Brand and indicate code

MTO/MESSKO

The oil level indicator should have auxiliary contacts ungrounded (nongrounded contacts) to alarm and trip, to point out that the minimum acceptable oil level has been reached.

YES

The oil level indicator must allow replacement of the display unit without changing or removing the measuring unit.

YES

An additional signal, the oil level should enter into a hub and this will be sent via IEC 61850 protocol.

YES

W.3

Oil gauge OLTC

Brand and indicate code

I-J INTERNATIONAL

W.4

valves

The transformer must be supplied with special bronze valves for electrical equipment for the following purposes:

•      Sampling oil from the lower part of the tank.

•      To lower connection filter press (filter press), and total oil drain tank (2 inches).

•      For upper press connection filter (2 inches).

•      To fully isolate each pump exchanger for maintenance.

•      To drain oil exchanger.

•      To isolate each of the tanks attached to the main tank, p. Axis.; the curator of the main tank.

•      Each of the valves must be equipped with blind flange.

YES

W.5

Pressure gauge and vacuum

Brand and indicate code

The scale of the gauge should be between 0.7 kilograms per square centimeter above atmospheric pressure and 0.7 kilograms per square centimeter under atmospheric pressure.

YES

Suitably sized dial diameter about 10 cm and conveniently located for visibility distance.

Send signals to monitor the transformer and send it in IEC 61850, a transformer monitoring equipment.

W.6

Buchholz relay

Indicate brand and code

BC80/EMB

You must have alarm contacts operated by accumulation of gases produced by an incipient fault and trip contacts to get out of the transformer through the tripping of circuit breakers, high and medium voltage when a large amount of gas starts to flow due to an internal fault in the transformer or regulator.

YES

Operating temperature of -50 ° C to + 80 ° C. Safety glass must be tempered with UV filter. Must have two windows on each side of the relay for inspection floats independently.

YES

Alarm contacts (2 reversible) and shooting (2 reversible) should not have contact with the transformer oil. Floats must be solid. IP55. It must be supplied with a test report indicating results team functional testing and sealing with helium gas.

YES

With test button for all contacts for gas, oil level and flow. In the case of operation flow, the float must remain in the actuated position, clearly indicating its operation.

YES

With reset option, sampling and test functionality option for air injection.

YES

This device signals will be entered signal to a hub where all mechanical transformer protection focus, and this information should be sent via IEC 61850 protocol.

YES

w.7

Control cabinet

IP 55

IEC 60259

YES

W.8

Impact Recorder

For transportation from the factory to the site of delivery:

digital display (for sample results)

Acceleration X / Y / Z

IP55. This element will be delivered to the provider after analyzing the data.

YSD-2200,108X48X30

x.       TRANSFORMER OIL

X.1

Oil

Indicate brand and product code

45#/KUNKUN

x.2

Quantity

The amount required for the transformer plus 10%

YES,10% PLUS

x.3

Rule

IEC 60296 and IEC 60156

IEC60295,IEC60156

x.4

PCB content and PDD'S

None

NONE

x.5

Mineral oil

inhibited

INHIBIED

x.6

New

YES

YES