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Solar IDT Specifications

The document provides the technical specifications for 2MVA, 33kV inverter duty transformers to be used in a 5.2MWp solar park. It lists 42 parameters for the transformers including their ratings, cooling type, voltage levels, insulation class, impedance, efficiency levels, noise levels, temperature rises, and compliance to relevant standards. The transformers are required to supply power to the solar park located in Maharashtra, India.

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Vamsi Pavuluri
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7K views3 pages

Solar IDT Specifications

The document provides the technical specifications for 2MVA, 33kV inverter duty transformers to be used in a 5.2MWp solar park. It lists 42 parameters for the transformers including their ratings, cooling type, voltage levels, insulation class, impedance, efficiency levels, noise levels, temperature rises, and compliance to relevant standards. The transformers are required to supply power to the solar park located in Maharashtra, India.

Uploaded by

Vamsi Pavuluri
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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Technical specifications of Inverter Duty Transformers for 5.

2MWp Solar Park

Sl. No. Parameter description 2 MVA, 2 WDG, 33kV

1 Application Solar PV Power Plant


2 Service Inverter Duty Transformer, Outdoor
3 Type Continous
4 kVA Rating (Output) 2000
5 Cooling and Core Assembly ONAN and 1 CCA
6 HV Voltage (V) 33000
7 LV Voltage (V) 600V
8 No. of windings 1 on HV, 1 on LV
9 No. of phases 3
10 Rated frequency 50 HZ ± 3%
11 System fault level at 33kV 25kA
12 Short circuit Thermal withstand time 1 sec
13 Temperature rise above 50°C
a) In Oil by Thermometer 55°C
b) In winding by resistance 60°C
14 Basic Insulation Level
170 kVp
a) Impulse withstand voltage on HV side
70 kVrms
b) Power frequency voltage on HV side
3 kV
c) Voltage withstand level of LV winding
d) Voltage rise time withstand level of min. 1000V/micro second against ground
LV winding
15 Connection
a) HV side Delta
b) LV side Star
16 Vector Group Dyn11
17 Type of radiator Detachable
18 Winding on LV side and HV side Copper
19 Core Material CRGO
20 Insulation Class Class A

21 Tap Changer provision details Taps in range of -10% to +10% @ 2.5%

22 Tap provision on HV side


23 Method of tap changer control OCTC

24 % Impedance at 75°C rated current and 6% between HV and LV


frequency
25 Terminals
a) HV side Cable Box
b) LV side Cable Box
26 Paint shade Epoxy, Pebble Grey. Shade no. RAL7032
27 No. of WTI's and OTI's required 1 set
IEC 60076 and other standards related to
28 Reference Standard Transformers
29 Quantity required 2 nos
Village Kombhalne, Taluka Akole, Dist. Ahmednagar,
30 Location of supply
Maharashtra.

TO BE COMMITED BY MANUFACTURER
29 No Load Loss at Normal Voltage &
frequency (max)
30 Full load losses at 75°C at principal tap
(max)
31 Efficiency at 75°C and UPF
i) 100% Load
ii) 75% Load
iii) 50% Load
iv) 25% Load
32 Efficiency at 75°C and 0.8 PF
i) 100% Load
ii) 75% Load
iii) 50% Load
iv) 25% Load
33 Regulation at
i) Unity PF
ii) 0.8 PF
34 Maximum flux density
i) At rated voltage
ii) At 110% of rated voltage
35 Type of voltage variation
(CFVV/VFVV/CBVV)
36 HV winding resistances in Ohm
Phase 1
Phase 2
Phase 3
37 LV winding resistances in Ohm
Phase 1
Phase 2
Phase 3
38 Noise level in dB
39 Maximum hot spot temperature rise
40 Clearances in mm
41 Standard accessories & fittings
42 Approximate weight of
a) Core
b) Winding
c) Tank & Fittings
d) oil
e) Total weight
f) Oil quantity in Ltr.
g) Size of Main Tank
43 Shipping dimensions

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