HVD 450

The HVD 450 is a unique, wear-free switching and management system for discharging high voltage DC links. Discharging is done through a discharge resistor provided by the customer.

Instead of using mechanical contactors to switch the discharging process, the HVD 450 comes with a unique high voltage transistor which works wear-free. This gives the device a long service life and eliminates the need to regularly replace expensive high-voltage contactors. In addition, the HVD 450 enables intelligent monitoring of the discharging process and stops it in the event of faults

Measures: Voltage

731_ManualHVD450EN
Datasheet

Measure. Monitor. Repeat.

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Key Benefits & Features

  • SiC-based solid state contactor
  • Wear-free switching of high voltage DC links
  • Fast discharge times due to high current (8A per device, multiple devices in parallel are possible to multiply the current)
  • Integrated current and voltage monitoring
  • Robust and intelligent replacement for discharging contactors
  • Status outputs and signalling of potential hazards

HVD 450

Typical Applications

  • Discharge of DC links up to 1500 V
  • Energy storage discharge systems in high-voltage applications
  • Replacement of mechanical contactors in discharge circuits
  • Real-time monitoring of voltage and current during discharge
  • High-voltage systems requiring wear-free, reliable discharge control
  • Industrial and energy applications using PLC-controlled discharge systems

As industries shift to higher voltages of up to 1500V in DC links, efficient energy storage and discharge systems are crucial. Traditionally, mechanical contactors were used but faced wear and tear when switched under load.

The HVD 450 eliminates this issue by seamlessly switching discharge circuits without wear down, ensuring long-lasting performance. It integrates precise current and voltage monitoring for realtime surveillance of the discharge process. Control is simple and efficient with a standard 5-24V signal from a PLC.

The device provides comprehensive feedback on the discharge process, including potential errors or hazards. Experience the future of discharge technology with the HVD 450.

SectionTerminalDescriptionSpecification
Load OutputT-21/22 (+)
T-25/26 (−)
DC link discharge outputMax. DC link voltage (Uc): ≤ 1500 V
Max. discharge current (Ic): ≤ 8 A
Limit current alarm (Ig): ≥ 9.6 A
Residual voltage: < 10 V
Discharge time constant (τ): 100 ms … 10 s
DC Link InputT-17/18 (+)
T-25/26 (−)
DC link voltage measurementMeasurement range: 0 … 1500 VDC
Discharge Status OutputT-5 (+)
T-6 (−)
Discharge status signalSignal: ON = LOW (~3 V)
Open collector output
Output rating: 5 … 30 VDC, I ≤ 50 mA
Error Status OutputT-7 (+)
T-8 (−)
Error indication signalSignal: ON = LOW (~3 V)
Open collector output
Output rating: 5 … 30 VDC, I ≤ 50 mA
Start Signal InputT-9 (+)
T-10 (−)
Discharge start commandStart signal level: 5 … 30 VDC (High level)
Power SupplyT-3 (+)
T-4 (−)
Auxiliary power supplySupply voltage: 24 VDC (18 … 30 VDC)
Power consumption: max. 1 W
Protective EarthT-1 / T-2PE / groundingAdditional grounding via ME-MAX board contact when mounted on grounded DIN rail
LED IndicatorsFront LEDsDevice status indicationGreen LED: Power / supply on
Red LED: Error / failure
Yellow LED: Discharge active

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