Frequency Converters, Motor Drives & Military UPS Systems

For 60 Hz and 400 Hz at the same time on separate channels outdoors, the PowerGuard Outdoor: 12 kVA, 7 isolated outputs (5 × 60 Hz + 2 × 400 Hz), −32 °C … +55 °C, smart PDU included. For a variable 115–220 VAC output adjustable between 60 and 400 Hz from one unit, the PowerGuard 115/200 VAC 400 Hz Static Frequency Converter: 3-phase 360–440 VAC input, star or delta connection. For naval and land platforms that want transformer, converter and distribution in one cabinet, the AC-AC Frequency Converter Transformer System: 12 kVA, 2 × 400 Hz + 5 × 60 Hz outputs, per-output on/off, CAN-Bus. For low-power mission electronics that need 400 Hz and 28 VDC from the same unit, the PowerGuard TPS-115: 3-phase 115 VAC 400 Hz (600 VA) + 3 × isolated 28 VDC (600 W) from a 230 VAC input, 215 × 340 × 123 mm, fanless.

No. The "400" in the name is the input voltage: the PowerGuard 400/115 VAC AC-AC Inverter converts a 3-phase 400 VAC, 50/60 Hz input into a 115 VAC, 50 Hz output and splits a total of 10 kVA across four outputs (3.6 + 2.4 kVA three-phase, 2 + 2 kVA two-phase). The output is delivered through an isolated transformer, so it suits 115 VAC equipment at a site or platform connected to a 400 VAC grid. For equipment that needs 400 Hz, see the static frequency converters above.

Mil-Drive-55 is an FOC (field oriented control) drive for three-phase asynchronous motors: 5.5 kW nominal, 3 × 400 VAC / 0–500 Hz output, 14 A motor current, 400 VAC ±10% input. It supports resolver, incremental and absolute encoder and NTC temperature sensor inputs, and has dual-channel Safe Torque Off (STO), an emergency input and RS-485 and CAN-Bus communication. With a sealed aluminium enclosure and fanless passive cooling it operates from −32 °C to +55 °C, and is designed for applications such as turret drives, antenna positioning, hydraulic pumps and pedestal motion. Alternative power levels, additional I/O channels and custom communication protocols can be configured per project thanks to the modular design.

When the load must see no interruption at all if the mains or shore supply fails, the PowerGuard MIL-UPS-2K3 feeds the load through its inverter at all times with a double-conversion online topology; there is no transfer moment when the battery takes over. It runs from a 115 VAC ±20%, 45–65 Hz, 3-phase input, delivers 115 VAC 60 Hz pure sine at 2.3 kVA and provides 30 minutes of backup from a VRLA gel battery. It runs stably on capacitive loads down to a 0.3 power factor, and the manual bypass keeps the load running during maintenance. Radar, communication and console loads on naval and shore systems are the typical use.

Each product has its own interface; choose the one that matches your specification. The PowerGuard Outdoor is monitored from a browser through its built-in web server without additional software and communicates over Ethernet and RS-422 via KN9. The 115/200 VAC 400 Hz Static Frequency Converter uses RS-422 and Ethernet-based desktop software; the 400/115 VAC AC-AC Inverter and the MIL-UPS-2K3 are monitored and switched on and off remotely over Ethernet on the KN6 connector. The AC-AC Frequency Converter Transformer System uses CAN-Bus, the TPS-115 RS-485 HD (10 Mbps), and the Mil-Drive-55 RS-485 and CAN-Bus. Most units also carry an OLED display and/or BIT (built-in test) on the unit itself.

The PowerGuard Outdoor completed MIL-STD-810G CHG-1 environmental (temperature, vibration, shock) and MIL-STD-461E EMI/EMC testing at an ISO/IEC 17025 accredited laboratory, and the PowerGuard 115/200 VAC 400 Hz Static Frequency Converter has passed MIL-STD-810G CHG-1 and MIL-STD-461G testing at an accredited laboratory. The other products are designed to the standards stated in their datasheets: MIL-STD-810G and MIL-STD-461F for the Mil-Drive-55 and MIL-UPS-2K3, MIL-STD-810G and MIL-STD-1399B for the 400/115 VAC AC-AC Inverter, while the AC-AC Frequency Converter Transformer System has been assessed to military test methods. When requesting a report, ask for the standard and method number, the laboratory name, the test date and the serial number of the unit tested. For a quotation, send the input voltage and number of phases, output frequency, total power and number of outputs, indoor or outdoor use and the monitoring interface through the quote form.