Pure sine wave DC/AC inverter CSI 1K F31-HSA

for marine applicationsfor the mining industryfor the transportation industry

Overview
CSI 1K F31-HSA series DC-AC inverters use microprocessor-controlled high-frequency PWM technology to generate up to 1 kVA of pure sine wave output. The design includes a DC-DC boost stage that raises the input voltage to a higher DC bus which feeds the DC-AC inverter to produce continuous, low-distortion AC. Output options include 115 Vac continuous at 60 Hz or 400 Hz, and 230 Vac continuous at 50 Hz. Output neutral is chassis-referenced; isolated floating output is available on request. Typical full-load efficiency is approximately 80%. Optional features include an output-fail alarm (Form C) and remote shutdown.

Mechanical construction and cooling
The units are convection-cooled via a custom heatsink assembly (HSA) with fins attached to the under-surface. This arrangement permits mounting on uneven or thermally non-conductive surfaces (e.g. wood, plastic, brick) and operation without fans or external heatsinking. The heatsink assembly can be chassis-mounted or fitted to a 19 in panel. Designed to operate over -25°C to +50°C for full specification without derating.

Applications
The CSI 1K F31-HSA series is intended for power utilities, mining, marine, industrial automation and transportation systems requiring clean, reliable AC power from DC sources.

EMI, safety standards and electronic protection
Input and output filtering reduces ripple and conducted emissions. The input stage meets EN55032 Class A with margins; Class B available as an option. The product conforms to EN62368-1 and equivalent UL/CSA safety standards. Electronic protections include 1000 Vdc input-to-chassis/output isolation, inrush current limiting, output current limiting with short-circuit protection, and thermal shutdown with automatic recovery if cooling is insufficient.

Key Specifications

• Power rating: 1000 VA industrial DC-AC sine wave inverter (24 Vdc version derated to 750 VA)
• Output: 115 Vac continuous @ 60 Hz or 400 Hz; 230 Vac continuous @ 50 Hz
• Input voltages: 24 Vdc (derated), 36 Vdc, 48 Vdc, 125 Vdc, 250 Vdc
• EMI: EN55032 Class A (Class B optional)
• Standards: Designed to meet UL458 equivalent and EN62368-1
• Cooling: Convection via heatsink assembly (HSA) with fins; fanless operation
• Mounting: Heatsink assembly allows mounting on uneven and non-conductive surfaces; compatible with chassis or 19 in panel mounting
• Operating temperature (full spec): -25°C to +50°C
• Protections: 1000 Vdc input-to-chassis/output isolation; inrush limiting; current limiting and short-circuit protection; thermal shutdown with auto-recovery
• Typical efficiency at full load: ≥ 80%
• Ruggedized construction; internal boards conformal coated
• Enclosure including heatsink assembly dimensions: 572 x 150 x 356 mm (W x H x L)

Technical specifications

• Series: CSI 1K F31-HSA
• Rated power: 1000 VA (24 Vdc version derated to 750 VA)
• Inputs: 24 Vdc (derated), 36 Vdc, 48 Vdc, 125 Vdc, 250 Vdc
• Outputs: 115 Vac @ 60 Hz or 400 Hz; 230 Vac @ 50 Hz
• Cooling method: Convection via heatsink assembly with fins (HSA); fanless operation
• Mounting: Chassis or 19 in panel compatible; allows mounting on thermally non-conductive surfaces
• Operating temperature: -25°C to +50°C (full specification)
• Efficiency: typically ≥ 80% at full load
• Protections: input-to-chassis/output isolation 1000 Vdc; inrush limiting; current limiting and short-circuit protection; thermal shutdown with automatic recovery
• Standards compliance: EN55032 Class A (Class B optional); EN62368-1; UL458 equivalent