ELETTRO MAULE, ISO 9001 certified company, has considerable experience in the manufacture of: Off load tap changers for transformers. Production includes tap changers with hand control set and also with remote motorized control set . Sizes of the tap changers are from 30A up to 1600A and for rated voltages from 10 kV to 72 kV. Our tap changers are appreciated by our customers because : of our choice for special materials, our precise and accurate manufacture combined with the easy to assembly of all components. Above mentioned qualities lead our products to be unique. Our production is composed by : Standard and non-standard versions, this to suit different customer’s needs. All the different tap changers versions shown in the catalog allow the customer to choose the tap changer that better meets his requirements. We can offer different accessories that will fulfill special needs, or requests : such as Installation in different environments, protection from wrong handling or similar Different accessories are: • Control set with stainless steel shaft - oil tightness ; • Security lock to prevent unauthorized maneuvers; • Control set with Aluminum protection cover. • Tinned or silvered contacts/pins/ clamps. We performed on our tap changers strict controls to check mechanical characteristics and electrical continuous performances. The Prototypes have been tested at CESI in Milan, as follows: • Verification of temperature-rise limits (ref. IEC 214 '89); • Verification of the resistance to the short-circuit current (ref. IEC 214 '89); • Dielectric test (ref. IEC 60-1 '89). Tap changers passed all tests; Results are documented with reports n ° CESI: MP 96/030008, AT 96/017493, MP 96/030007, AT 96/023881, MP 96/035302, AT 96/034397, 99/005049 MP, MP 99/005050.