The Siemens SITAS 4AM4342-5FT10 is a 315VA control transformer configured for 500V primary supplies, converting to 230V at 1.37A for auxiliary circuits. The 500V level is commonly found in mining operations, heavy manufacturing plants, and regions following older IEC 60038 distribution standards where 500V (rather than 400V) is the three-phase line voltage.

500V Supply Context

500V three-phase systems are prevalent in specific industrial sectors: underground mining (IEC 60364-7-710), heavy process industries, and legacy installations in certain regions. The primary taps at 475V, 500V, and 525V (+-5%) accommodate voltage variation within these networks. The transformer generates a standard 230V single-phase auxiliary supply for control circuits, instrumentation, and service outlets without requiring a separate LV distribution transformer.

Performance & Build

EI 105/60 laminated core at approximately 90% efficiency. The 1,120VA short-time (S6) rating — 3.6x continuous — handles high-inrush loads reliably. IP00 open-frame, 107x111x120mm, ~4.6kg, screw mounting with screw-type and tab terminals.

Certifications

Certified to EN 61558-2-2 and EN 61558-2-4 with CE, cRUus (UL/CSA recognized), and EAC approvals. Class B insulation, 40 C ambient.