The schooner "MARIA" off Liverpool, UK & our founder, Mr. JOHN HOLT (1841-1915)
John Holt EngineeringJohn Holt Leasing ServicesJohn Holt VenturesJohn Holt LogisticsJohn Holt & Co (Liverpool)John Holt Fire protectionYamaha NigeriaJohn Holt AssemblingAlmarine
Power transformers
   
Holtstar transformers
Oil Distribution Transformers with conservator
Ranging from 25 kVA to 2500 kVA

Quality Holtstar high-power transformers for Nigerian market from Europe for indoor and outdoor installation. The tank is made of welded reinforced steel sheet, fully painted with special epossidic enamel, corrosion proof. Transformers is filled with mineral oil according to CEI standard. Equipped with earthing terminal, lifting lugs, bidirectional rollers and auxiliary terminal box.

 
Power, kVA
Loses,
Po (W)
Uk, %
High,
mm
Weight, kg Price
25
200
4.0
1120
300
50
235
4.0
1165
350
63
250
4.0
1175
400
100
380
4.0
1200
500
125
440
4.0
1240
600
160
500
4.0
1240
700
200
660
4.5
1270
800
250
770
4.5
1300
950
315
990
4.5
1360
1100
400
1150
5.0
1430
1300
500
1350
5.0
1455
1500
630
1850
6.0
1525
1700
800
1950
6.0
1590
2100
1000
2200
6.0
1815
2700
1250
2500
6.0
1930
3250
1600
3200
6.0
2100
3900
2000
3600
6.0
2180
4600
2500
4400
6.0
2310
5400
Specifications are subject of change whithout notice