11kV 1000kVA Distribution Transformer

Short Description:

11kV 1000kVA distribution transformer manufactured by WEIFAN GROUP in China. It uses Dyn11 and the core is laminated with quality cold-rolled silicon steel sheets. Fully sealed structure, which prolongs the service life. Lower noise value than standard requirement....

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11kV 1000kVA Distribution Transformer

Features of 11kV 1000kVA Distribution Transformer:

1. The transformer connection group uses Dyn11 to reduce the impact of harmonics on the power grid and improve the quality of power supply.

2. The transformer core is laminated with quality cold-rolled silicon steel sheets, which greatly reduces the no-load loss and no-load current. The core is bound to ensure the tightness of the core and reduce noise.

3. Fully sealed structure, which prolongs the service life. A positioning mechanism is added to the body to prevent displacement during transportation. All fasteners are equipped with fastening nuts to ensure that the fasteners are not loose during long-term operation.

4. Lower noise value than standard requirement. After this series of transformers have been transported normally, the relevant parts can be installed without core inspection, and they can be put into operation once the acceptance test is qualified.

Technical Data of 11kV 1000kVA Distribution Transformer:

Item	Description	Schedule 2 (TENDERER OFFER) -1000kVA
1	Quantity	1
2	Transformer Rating kVA	1000
3	System Frequency Hz	50
4	Transformer external paint	Dark Admiralty Grey colour No. 632 as per BS 381C
5	Corrosive environment	High
6	Dimensions
6.1	Overall height mm	1800
6.2	Overall length mm	2090
6.3	Overall width mm	1430
7	Total mass KG	2261
8	Tank type	Breathing
9	Tank sealing;	Bolted
10	Under-base;	660×820
11	Skids and Jacking lugs for concrete plinth mounting	40
12	Details of jacking pads	See drawing
13	Lifting lugs
13.1	For cover	YES
13.2	For tank	YES
14	Terminations	Cable box
15	Position of bushings	11kV: Top, LV: Cable Box
16	Medium-volage bushings
16.1	material/colour	Brown Porcelain
16.2	creepage distance mm	25 mm/kV
16.3	phase to earth clearance mm	≥125
16.4	phase to phase clearance mm	≥125
17	Low-voltage bushings
17.1	material/colour	Brown Porcelain
17.2	creepage distance mm	25 mm/kV
18	Cooling method	ONAN
19	Core type	Laminated stackings
20	Core clamping	Channel
21	HV Winding	Cu
22	LV Winding	Cu
23	Primary voltage V	415
24	Secondary voltage V	11000
25	Number of phases;	3 Phase
26	Rating of neutral terminal	As phase terminal
27	Tap Changer	NLTC, ±2X2.5% Tapping range
28	Vector symbol	dYN11
29	Losses corrected to 75°C
29.1	no-load losses W	1799
29.2	full load cu losses W	11250
29.3	full load total losses W	13049
29.4	25% loading W	4815
29.5	50% Loading W	7830
29.6	75% Loading W	10855
29.7	125% Loading	16892
29.8	Transformer efficiency at unity % power factor, rated voltage and full load (75°C)	0.988
30	Impedance voltage
30.1	maximum tap %	≤5.3
30.2	nominal tap %	≤5
30.3	minimum tap %	≤4.75
31	Insulation level
31.1	medium-voltage kV	35/85
31.2	low-voltage kV	5