Customization: | Available |
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Application: | Power |
Certification: | ISO9001-2000 |
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TECHNICAL SPECIFICATIONS |
BUYERS |
TECHNICAL SPECIFICATIONS OFFERED |
SHEET NUMBER WHERE HAS DECLARED Technical Specification |
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a. |
BRAND |
Indicate |
HEMG |
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b. |
ORIGIN |
Indicate |
CHINA |
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c. |
Year of production |
No earlier than 2019 |
2019 |
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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 |
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e. |
e. TRANSFORMER FEATURES |
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E.1 |
Number of phases |
3 |
3 |
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E.2 |
Frequency |
60 Hz |
60HZ |
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E.3 |
Voltage High Voltage AT (H winding) |
46 kV |
46KV |
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E.4 |
Voltage (1) Nominal MT Medium Voltage (X winding) |
23 kV |
23KV |
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E.5 |
Voltage (2) Medium Voltage nominal MT (X winding) |
6.3 kV |
6.3KV |
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e.6 |
Maximum operating voltage phase-phase, system 46 kV, 15% |
52.9 kV |
52.9KV |
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e.7 |
Maximum operating voltage phase-phase, system 23 kV, 15% |
26.45 kV |
26.45KV |
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e.8 |
Maximum operating voltage phase-phase system 6.3 kV, 15% |
7,25 kV |
7.25KV |
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e.9 |
Type earthing system |
Multigrounded |
Multigrounded |
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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 |
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e.11 |
internal insulation |
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Nominal System Voltage RMS |
Basic Insulation Level (BIL), CREST [kV], wave 1.2 / 50 microseconds [kV] |
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6.3 kV |
95 |
95kv |
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23 kV |
150 |
150kv |
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46 kV |
250 |
250kv |
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e.12 |
external insulation |
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Nominal System Voltage RMS |
Basic Insulation Level (BIL), CREST [kV], wave 1.2 / 50 microseconds [kV] |
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6.3 kV |
125 |
125kv |
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23 kV |
200 |
200kv |
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46 kV |
325 |
325kv |
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Features trasformador (step down transformer) |
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Operating conditions |
46 / 23-6.3 kV |
46/23-6.3kv |
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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 |
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e.14 |
Temperature rise of the windings at an ambient temperature of 30 ° C |
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Less than or equal to |
60 ° C |
60 |
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hottest spot (hot spot) |
78 ° C |
78 |
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AT connection |
DELTA |
DELTA |
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MT connection |
STAR (Grounded Wye) |
STAR(GROUNDED WYE) |
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Connection Group 46/23 - 6.3 kV |
DYN1 |
DYN1 |
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Selector 23 to 6.3 kV |
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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 |
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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 |
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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 |
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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 |
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f. WORKING CONDITIONS |
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F.1 |
Mounting height |
3000m |
3000M |
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F.2 |
Variation range of room temperature |
It should operate in a range of 0 ° C to 40 ° C |
0 ° C to 40 ° C |
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F.3 |
Wiring and auxiliary equipment |
Tropicalizado for fungi and parasitic plants |
YES |
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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 |
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F.5 |
Degree of protection cubicles |
IP 55 |
IP55 |
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F.6 |
Degree of seismicity |
0.5 g |
0.5G |
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F.7 |
Installation |
Exterior |
OUTDOOR |
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f.8 |
Number of Bushing |
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High Voltage AT |
3 |
3 |
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Medium Voltage MT |
4 (including the Neutral to 23-6.3 kV) |
4 |
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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% |
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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 |
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F.11 |
transformer type |
Step down |
SETP DOWN |
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Oil immersed |
OIL IMMERSED |
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Suitable for outdoor installation. |
SUITABLE FOR OUTDOOR |
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a. |
g. Rising temperatures, above ambient temperature of 30 ° C |
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G.1 |
Oil temperature |
According to applicable standards (state value and standard). |
≤55ºC/IEC |
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G.2 |
Hottest point temperature oil (hot spot) |
According to applicable standards (state value and standard). |
≤65ºC/IEC |
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G.3 |
Winding temperature |
According to applicable standards (state value and standard). |
≤65ºC/IEC |
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G.4 |
hottest spot winding temperature (hot spot) |
According to applicable standards (state value and standard). |
≤75ºC/IEC |
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h. LOSSES |
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H.1 |
Lost uncharged (core) 100% of rated voltage |
< 15 kW
Mandatory annex preliminary calculation |
≤15KW |
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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 |
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H.3 |
Losses in rated load position (Copper), 15 MVA (OFAF), 75 ° C 46 / 6.3kV |
<76 kW
Mandatory annex preliminary calculation |
≤76KW |
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h.4 |
Impedance transformer to power OFAF (15 MVA) AT nominal position to 75 ° C |
<8%
Mandatory annex preliminary calculation |
≤8% |
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i. BUSHINGS OFFERED |
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i.1 |
High voltage side 46 kV |
Brand and product code |
BFSD72.5-630ª/XND |
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i.2 |
Low voltage side 23 kV (these installations are used bushing at 6.3 kV) |
Brand and product code (phases) |
BFSD24-2500A/XND |
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Brand and product code (neutral) |
BFSD24KV-2500A/XND |
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j. DIELECTRIC OF A FREQUENCY INDUSTRIAL BUSHING (BIL levels requested and considered correct height to 3000 m) |
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J.1 |
High voltage side 46 kV |
350 kV |
350 |
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J.2 |
Low voltage side 23 kV |
250 kV |
250 |
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k. ADDITIONAL FEATURES OF THE TRANSFORMER BUSHING |
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k.1 |
Material bushings AT and BT |
autolimpiable hydrophobic polymer |
AUTOLIMPIABLE HYDROPHOTIC POLYMER |
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k.2 |
minimum distance between phases 46 [kV] |
630 mm |
1813MM |
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k.3 |
minimum distance between phases 23 [kV] |
380 mm |
600MM |
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k.4 |
Type bushings |
Condenser type (for 46 kV) insulation class E type for AT and BT. |
RIP/E-CLASS |
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RIP (resin- impregnated paper) |
RIP |
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IEC 60137, IEC 60071-2 |
IEC60137.IEC60071-2 |
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K.5 |
AT degree of pollution and BT |
TYPE III |
TYPE III |
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K.6 |
Terminals supply 46 kV |
For copper and aluminum wire MCM 600-1000; IEC 60273 |
MCM600-1000,IEC60273 |
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K.7 |
Terminals supply 23 kV - 6.3 kV |
For copper and aluminum conductors 2 phase, MCM 500-1000; IEC 60273 |
MCM500-1000,IEC60273 |
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K.8 |
Neutral Terminal Supply |
For copper and aluminum wire Caliber as recommended factory |
MCM500-1999,IEC60273 |
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l. Load Tap Changer OLTC |
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L.1 |
Load tap changer |
Brand and product code |
V2CIII.HM |
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l.2 |
Certificate of Compliance IEC 60214 |
append certificate |
IEC60214 |
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l.3 |
Location of OLTC |
Side of 46 [kV] |
60KV SIDE |
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L.4 |
Switching technology |
in vacuo |
VACUUM |
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l.5 |
Rated voltage regulation |
8 steps of 1.875% w / u |
+8X1.875% |
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L.6 |
Regulation under the nominal voltage |
8 steps of 1.875% w / u |
-8X1.875% |
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L.7 |
Location exchanger taps |
Internal to the main transformer Cuba |
YES |
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L.8 |
Step voltage supported |
Indicate - V |
862.5V |
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L.9 |
BIL complete isolation level OLTC |
350 kV |
350KV |
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L.10 |
Switch Type |
Three phase |
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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% |
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L.12 |
It allows manual operation |
YES |
YES |
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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 |
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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 |
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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
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L.16 |
Operation Counter |
It shall indicate the accumulated number of operations performed. |
500000 |
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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 |
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L.18 |
Selection Switch operation |
Manual - Off - Auto - Remote |
Yes |
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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 |
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The power supply equipment will be 125 VDC. |
125vdc |
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The relay will come protected against transient surges that can damage the relay or its internal programming. |
yes |
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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 |
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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 |
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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 |
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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 |
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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. |
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The regulator must comply with all requirements of IEC 61850. |
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The controller box should be metallic, with available land connection and minimum degree of protection IP54 (in accordance with IEC 60529 standard). |
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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 |
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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 |
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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 |
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Conductors and terminal blocks (terminal blocks) that are required. should be assigned an additional 10% of terminal blocks. |
yes |
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Cubicles needed to accommodate all instruments and control devices, protection or basic elements of load tap exchanger. |
yes |
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The control cubicle must have heaters, controlled by thermometer and hygrometer, to prevent condensation of moisture on the instruments and interior lighting. |
yes |
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It must have a device to calibrate and regulate the voltage for values of bandwidth from 0.5%. |
yes |
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Low Voltage Lock |
yes |
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Overcurrent blocking |
yes |
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Automatic acceleration over voltage |
yes |
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m. COOLING SYSTEM |
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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 |
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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 |
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n. Heat exchanger |
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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 |
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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 |
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o. MATERIALS AND FINISHES |
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o.1 |
Cuba and expansion tank |
ASTM A283 steel conforming |
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O.2 |
Operating pressures |
> 25% at maximum pressure operation resulting oil preservation system used. |
Yes |
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O.3 |
Test protocol |
As stated in dd.4 tests. |
yes |
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o.4 |
positive and negative maximum pressures |
Indicate name plate |
98Mpa(positive)max 133Mpa(negative)max |
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O.5 |
Isolation valves (expansion tank) |
Indicate |
DIN25/3PCS |
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O.6 |
consistent with the type of welding grade steel |
Accordance with ASME Section 8, free of burrs and corrosive substances. |
YES |
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O.7 |
Access bushing connections, CTs, OLTC, etc. |
Manholes and handholes |
YES |
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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 |
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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 |
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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 |
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You must accommodate a range between 2/0 AWG gauge driver 300 MCM. |
YES |
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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 |
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o.12 |
Cuba top cover |
Should be subject only to bolts, welding is not supported. |
YES |
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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 |
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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 |
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o.15 |
windings |
Copper Able to withstand dielectric tests specified in the rating. |
YES |
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o.16 |
Winding insulation |
Class E 120 ° C |
CLASS E120ºC |
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o.17 |
Nucleus |
Type grain oriented sheet should be of high quality. |
GRAIN ORIENTED SHEET |
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o.18 |
Core insulation |
Class B 130 ° C |
B130ºC |
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O.19 |
Insulation paper |
Heat stabilized ANSI / IEEE C57.100 |
ANSI/IEEE C57.100 |
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O.20 |
Noise levels |
According to NEMA Standards Publication No. standard 1-993 (R2000). |
75DB |
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o.21 |
Descriptive characteristics of the core |
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Without deformation resistance |
Short efforts, maneuvers, operation and transportation. In any case cause deformation. |
YES |
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Displacement of core laminations |
Avoid travel by transportation, handling, operation, etc. |
YES |
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O.22 |
Connection of the core |
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column type and structure. |
Grounded at a single point by easily accessible external connection, to check the insulation core. |
YES |
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o.23 |
Ground connection removed |
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Without oil |
> 200 MW 1000 V DC to a moisture content of <70% |
YES |
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With oil |
> 200 MW 2000 V DC |
YES |
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o.24 |
Cutting burr mill |
<0.025 mm |
YES |
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O.25 |
Ability to withstand short circuit |
Specify the level of short circuit that can withstand the transformer AT and MT. |
YES |
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o.26 |
Thickness of the outer paint |
> 140 microns |
160MICRONS |
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O.27 |
wood used |
IEC 61061 |
IEC61061 |
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o.28 |
Core-drying process Coils |
VAPOR PHASE |
YES |
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o.29 |
Degree of Polymerization |
> 1050 units |
1100 |
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IEC 450 |
IEC |
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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 |
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o.31 |
Cable Labeling |
Bidirectional according to the wiring sheets and delivered flat. |
YES |
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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 |
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p. Conveyors, MOBILIZATION AND ANCHOR TRANSFORMER |
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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 |
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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 |
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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 |
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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 |
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q. REFRIGERATION |
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Q.1 |
Kind |
OFAF heat exchanger type (Oil Forced Air Forced). |
YES |
|
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Microprocessor controlled electronic device which ensures operating temperatures <30 ° C. |
YES |
|
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r. ASSOCIATED WITH FANS COOLING SYSTEM |
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r.1 |
Operation |
Exchanger fans must be within the noise limits transformer; Three-phase voltage supply must be 210/121 volts. |
YES |
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R.2 |
Protection |
Fans must have alarms and overload protection, independent. |
YES |
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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 |
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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 |
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s. THERMOMETER OIL TEMPERATURE MEASUREMENTS |
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S.1 |
Oil thermometer (OTI) |
Brand and code |
MT-160SK.EMSSKO |
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S.2 |
Degree of protection |
IP55 |
IP55 |
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S.3 |
MPE |
+/- 2 ° C |
(+/-2ºC0 |
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S.4 |
Rank |
0-120 ° C |
0-120 |
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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 |
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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 |
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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 |
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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 |
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t. MEASURING SYSTEM OF TEMPERATURE WINDING |
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T.1 |
Thermometer windings (WTI) |
Brand and code |
MT-160STK/MESSKO |
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T.2 |
Degree of protection |
IP55 |
IP55 |
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T.3 |
MPE |
+/- 2 ° C |
+/- 2 ° C |
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t.4 |
Rank |
0-120 ° C |
0-120 ° C |
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T.5 |
Measurement type |
thermal imaging, located in a phase of one of the windings. |
YES |
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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 |
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t.7 |
Contacts Thermometer |
Oil indicator (OTI) as the winding temperature indication (WTI), for different applications must be factory calibrated. |
YES |
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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 |
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u. PRESSURE RELIEF DEVICE |
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u.1 |
Pressure relief valve |
Brand and code |
MPREC/MESSKO |
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u.2 |
In case of overpressure |
a tubular system is included to drive the oil. |
YES |
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u.3 |
Activation time |
<2ms |
YES |
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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 |
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u.5 |
Safety valve |
Cover involving the entire valve, avoiding interference climate and does not interfere with viewing semaphore or flag. |
YES |
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You must have at least 4 contacts for alarm, and connection must be in junction box with IP-65 grade. |
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PRESERVATION OF OIL SYSTEM v. SYSTEM EXPANSION TANK OR CONSERVATIVE |
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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 |
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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 |
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w. ACCESSORIES |
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w.1 |
Valves Cuba, exchanger, expansion tank, OLTC |
Bronze or brass and flanged connection |
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W.2 |
Level indicator transformer oil |
Brand and indicate code |
MTO/MESSKO |
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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 |
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The oil level indicator must allow replacement of the display unit without changing or removing the measuring unit. |
YES |
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An additional signal, the oil level should enter into a hub and this will be sent via IEC 61850 protocol. |
YES |
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W.3 |
Oil gauge OLTC |
Brand and indicate code |
I-J INTERNATIONAL |
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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 |
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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 |
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Suitably sized dial diameter about 10 cm and conveniently located for visibility distance. |
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Send signals to monitor the transformer and send it in IEC 61850, a transformer monitoring equipment. |
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W.6 |
Buchholz relay
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Indicate brand and code |
BC80/EMB |
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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 |
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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 |
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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 |
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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 |
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With reset option, sampling and test functionality option for air injection. |
YES |
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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 |
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w.7 |
Control cabinet |
IP 55 IEC 60259 |
YES |
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W.8 |
Impact Recorder
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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 |
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x. TRANSFORMER OIL |
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X.1 |
Oil |
Indicate brand and product code |
45#/KUNKUN |
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x.2 |
Quantity |
The amount required for the transformer plus 10% |
YES,10% PLUS |
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x.3 |
Rule |
IEC 60296 and IEC 60156 |
IEC60295,IEC60156 |
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x.4 |
PCB content and PDD'S |
None |
NONE |
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x.5 |
Mineral oil |
inhibited |
INHIBIED |
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x.6 |
New |
YES |
YES |
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