The Auxiliary Power Supply Circuit Board for 690V Inverters (Part Number: 790075P098 - Original Italian Name: SCHEDA ALIMENT.INVERTER 690V) engineered and manufactured by premier Italian power electronics specialist SECOM s.r.l. is a high-grade switched-mode power supply (SMPS) sub-assembly engineered to step down, isolate, and stabilize auxiliary operating voltages inside SECOM 690V industrial inverter drive systems.

PRODUCT OVERVIEW & SPECIFICATIONS (790075P098):
- Part Number: 790075P098
- Factory Code: SCHEDA ALIMENT.INVERTER 690V (SCHEDA DI ALIMENTAZIONE)
- Manufacturer: SECOM s.r.l. (Italy)
- System Architecture: Designed specifically for SECOM high-voltage inverter cabinets operating on 690V AC industrial distribution networks (internal DC-Link bus levels up to 1000V - 1200V DC).
- Sub-System Power Distribution: Provides isolated, conditioned DC rails (such as ±15V DC, +24V DC, and +5V DC) dedicated to powering internal electronic assemblies, including digital signal processors (DSP), gate driver firing boards (such as SECOM 110582), optical feedback interfaces, and measurement transducers.
- Ruggedized Circuit Architecture: Built with high-dielectric multilayer PCB substrate treated with heavy-duty conformal coating to guard against high humidity, atmospheric particulate deposition, and conductive metallic dust.

KEY ADVANTAGES:
- Wide High-Voltage Input Capability: Functions steadily from high-voltage DC bus links, withstanding substantial line voltage fluctuations and switching commutation spikes.
- Enhanced Galvanic Dielectric Isolation: High-breakdown isolation barriers isolate high-voltage power components from sensitive control logic, preventing destructive voltage back-feed.
- Comprehensive Self-Protection: Features autonomous protection circuits including Over-Voltage Protection (OVP), multi-channel Short-Circuit Protection (SCP) with auto-recovery, and Thermal Shutdown safeguards.

• Manufacturer: SECOM s.r.l.
• Origin: Italy
• Part Number: 790075P098
• Factory Designation: SCHEDA ALIMENT.INVERTER 690V
• Device Category: Inverter Auxiliary Switched-Mode Power Supply Board (SMPS)
• Target System Voltage: SECOM 690V AC Variable Frequency Inverter Cabinets (DC-Link voltages up to 1200V DC)
• Input Source: Internal high-voltage DC-bus or dedicated auxiliary AC input
• Output Voltage Channels: Multiple galvanically isolated DC outputs (Typically: +24V DC, ±15V DC, +5V DC depending on stack)
• Output Voltage Regulation: ≤ ±1.5%
• Galvanic Isolation Rating: ≥ 4.0 kV AC test voltage between primary and secondary circuits
• Integrated Protection Circuitry:
  - Short-Circuit Protection (SCP) on all secondary outputs with automatic restart
  - Input Over-Voltage Protection (OVP) and Under-Voltage Lockout (UVLO)
  - Internal thermal overload protection
• Circuit Board Coating: Industrial conformal coating against humidity and dust
• Operating Ambient Temperature: -10°C to +65°C
• Storage Temperature Range: -40°C to +85°C
• Standard Compliance: Designed in accordance with IEC / EN 61800-5-1 and EN 60950
• Typical Applications: Primary auxiliary power source in 690V rolling mill drive inverters, cement kiln induced draft fan drives, oil & gas pipeline compressor drives, and marine propulsion frequency converters.