The power system was originally developed for powering subsea ROVs. As a result the build standard’s PCBs are coated with a solution with a high resistance to condensing salt moisture. Special fans are also used that are tolerant to salt moisture.

No mounting bars are positioned on the underside of the unit, so many customers prefer to secure the power supply using a U-clamp over the body or to fix in at the sides of the top and bottom of the RUG-HP-E with L-brackets. Another common method is to mount the into an enclosure vertically with a flange removed.

Each unit comes in a 19" rackmounting case as standard. Units can be optionally treated to a laboratory rack or flight case integration. Having a power system mounted into a flight case on castors is often advantageous, especially when the equipment is needed by multiple departments. 

Multiple power systems can be fitted into the same flight case. Door hangers are fitted for convenience. Existing ETPS systems can also be retrospectively integrated into new flight cases where requested.

The RUG-HP-E is an incredibly flexible product platform. We don’t just offer standard models. You can specify your own nominal voltage and current ranges. For example you might have a DUT that needs exactly 850V at 15kW. We can provide a new unit with exactly those output ranges.

The power supply can be operated in constant current or constant voltage mode. Where more functionality is required, the RUG-HP is available from our advanced series with extra operating features. This includes adjustable resistance, constant power mode and PV simulation for testing PV inverters in the field.

Where the power system is being supplied for use in a specific country, we can tailor the three phase input voltage to match the local grid conditions. A single phase input is possible up for 4kW and 5kW models on request (option /1P). 3kW models are built with a single phase input as standard.

Units can also be built with a user specified nominal DC input voltage in the range of 250VDC-750VDC ±10% (option /DC). For example, if you chose a 560VDC nominal then the power supply would be built with an input range of 504VDC–616VDC.

Each unit has an RS-232, LAN and isolated analogue interface with user switchable ranges (0-5VDC/0-10VDC) as standard. If computer control is required then any combination of integrated RS-485, GPIB and USB interfaces can be specified. ATE options are offered for system integration.

All new RUG-HP-E units are provided with free operating software. Live values of the power systems can be viewed remotely in a simple and intuitive way. This is particularly useful when operating the power supply in a location that is remote to the DUT.

Passive Overvoltage Protection (Option /POP)

Transient suppression diodes are fitted within the unit across the output stage. This is used to detect and clamp transient voltage spikes.

Decoupling Diode (Option /DDS)

Built-in diodes in the positive lines to guard against the DUT's voltage being fed back to the PSU. Rated at 150% of the nominal output of the model. The decoupling diode is commonly used when the RUG-HP-E is used to charge battery packs.

Freewheeling Diode (Option /FD)

Built-in diode arrangement across the output. This can permanently cycle the maximum current through the output stage. The main applications area is when the RUG-HP-E is used for testing electric drives and inductive loads. The worst case fault condition of the DUT should be considered. If the DUT actively generates back towards the power supply and there is nothing else in circuit to sink the current then there's the potential for voltage to rise above the nominal value and the rating of the DC filter which would cause damage.

Interlock AC or DC (Option /LOCK-AC or LOCK-DC)

This is an external option and provides a physical disconnection at either the AC input or DC output. Higher power systems in the range may require additional rack space compared to standard units for either of these options. There is a choice of operating the hardware interlock via closing the contacts or applying an external voltage.

Safety Cover Set (Option /SC)

Metal covers for the input and output terminals with cable glands. Screws are M4 × 8mm.