500kVA Three Phase Step Down Dry Type Power Transformer

• Customization: Available
• Application: Power
• Phase: Three
• Cooling Method: Dry-type Transformer
• Winding Type: Multi-winding Transformer
• Usage: Single-phase Transformer, Power Transformer, Distribution Transformer
• Frequency Characteristics: Power Frequency
• Shape of Core: EI
• Brand: Junke
• The Installation Height: <1000m
• Capacity: 30kVA-2500kVA
• Fire Class: F1
• Ambient Class: E2
• Transport Package: Wooden Package
• Trademark: JUNKE
• Origin: Wenzhou
• Production Capacity: 1000PCS/Month

Product Description

Product Parameter

Rated Capacity (kVA)	Voltage Combination			Connection group symbol	No-load loss (W)	Under the different insulation heat-resisting rank load loss(W)			No-load current %
	H.V.(kV)	High Voltage Tapping	L.V.(kV)			130°c (B)(100°c)	155°c (F)(120°c)	180°c (H)(145°c)
30	6 6.3 6.6 10 10.5 11	±2x2.5 ±5	0.4	Dyn11 Yyn0	130	605	640	685	2
50					185	845	900	965	2
80					250	1160	1240	1330	1.5
100					270	1330	1415	1520	1.5
125					320	1565	1665	1780	1.3
160					365	1800	1915	2050	1.3
200					420	2135	2275	2440	1.1
250					490	2330	2485	2665	1.1
315					600	2945	3125	3355	1
400					665	3375	3590	3850	1
500					790	4130	4390	4705	1
630					910	4975	5290	5660	0.85
800					1035	5895	6265	6715	0.85
1000					1205	6885	7315	7885	0.85
1250					1420	8190	8720	9335	0.85
1600					1665	9945	10555	11320	0.85
2000					2075	12240	13005	14005	0.7
2500					2450	14535	15445	16605	0.7

Transformer Detail
1.Three leg core:Made of grain oriendted low loss electrolami nations insulated on both sides.
2.Resilient spacers:To insulate core and windings from mechanical vibrations,resulting in low noise emissions.
3.HV winding:Consisting of vacuum potted single foil type aluminum or copper coils.
4.LV winding:Made of copper or aluminum strip.Turns firmly glued together by means of insulating sheet wrapper material.
5.Insulation:Mixture of epoxy resin and quatrz powder.Makes the transformer maintenance free,moistureproof,tropicalized,flame resistant and self extinguishing.
6.Clamping frame and truck:Rollers can be swung around for lengthways or sideways travel.
7.LV terminals:Normal arrangement:top,rear.Special version:Bottom,available on request at extra charge.
8.HV terminals:Variable arrangerments,for optimal station design.HV tapping links on low voltage side for adjust ment to system conditions,reconnectable in deenergized state.
9.Cross flow fans:Permitting a 50% increase in the rated power.

Temperature monitoring
By PTC thermitor detectors in the LV winding
Paint finish on steel parts
Multiple coating,RAL 5009.On request:Two component varnish or hot dip galvanizing(for particularly aggressive environments)
Ambient class E2
Climatic category C2 (if the transformer is installed outdoors,degree of protection IP 23 must beassured)
Fire class F1

 

Standard Feature

Dry Transformer Features

Safe, fire prevention, no pollution, can be installed directly in the load center;
Simple maintenance and installation, low comprehensive operating costs;
The moisture -proof performance is good, and it can run normally at 100%humidity;
Lost loss, small local discharge, small noise, and strong heat dissipation capacity, can run 150%of the rated load operation;
Equipped with a complete temperature protection control system; High reliability has reached the international advanced level;
Passed UL certification, the coil adopts special technology to enhance its ability to resist salt spray and moisture, and improve
operational reliability. all metal parts reach the
anti-corrosion level of C4 and above, and have strong adaptability to the offshore environment.
 

 

Temperature control device:
The transformer adopts the BWDK series signal thermometer. The temperature measuring element is embedded in the upper half of the
low-voltage coil, which can automatically detect and display the respective working temperature of the phase coil, and has the
function of over temperature alarm and trip.