LH Series

Up to 500kV Regulated High Voltage DC Power Supplies

The LH open stack family are sophisticated 4 kW power supplies with extremely low ripple and noise. They are air insulated fast response units with tight regulation. LH open stack series models consist of a rack style driver chassis, a high voltage stack assembly, and a remote control unit.

Specifications

Specifications apply from 5% to 100% rated voltage. (Operation is guaranteed down to zero voltage with a slight degradation of performance.)

  • Input: 187-228 V RMS, 3Ø, 48-63 Hz, 5500 VA maximum at full load. Less than 16A/Ø at 208 VAC. A five-position terminal block with protective cover is provided on the rear panel of the driver chassis. Mains service must be protected with fuses or circuit breakers with a maximum rating of 100 A for 200/208 VAC models & 60 A for 400 VAC models.
  • Efficiency: Typically 80% at full load
  • Output: Continuous stable adjustment from 0 to rated voltage or current by panel mounted 10-turn potentiometers with 0.05% resolution, or by external 0 to 10 V signals is provided. Repeatability better than 0.1% of setting. Voltage accuracy is 0.5% of setting + 0.2% of rated.

Features

  • Arc Quench: The HV output is inhibited for a short period after each load arc to help extinguish the arc
  • Embedded Microcontroller Control: Integral RS-232, USB and optional Ethernet communications provide remote control program and monitor
  • Air Insulated: The LH Series features “air” as the primary dielectric medium. No oil or encapsulation is used to impede serviceability or increase weight
  • Low Ripple: Typically, ripple is less than 0.1% peak to peak of rated voltage at full load
  • Parallelable: One master supply and up to 4 slave supplies provide a maximum of 12 – 20 kW depending on kV
  • Pulse-Width Modulation: Off-the-line pulse-width modulation provides high efficiency and a reduced parts count for improved reliability
  • Constant Voltage/Constant Current Operation: Automatic crossover from constant-voltage to constant-current regulation provides protection against  overloads, arcs, and short circuits
  • Constant Current/Current Trip: A rear-panel selector switch on the remote chassis allows selection of either current mode
  • Tight Regulation: Voltage regulation is better than 0.005% for allowable line and load variations. Current regulation is better than 0.1% from short circuit to rated voltage

Specifications Table

Dimensions: 
See Datasheet
Input Voltage:
187-264 VAC, 3 Phase or 340-460 VAC, 3 Phase
Efficiency: 
Up to 85%
Operating Temp: 
-20 to +40 °C
Worldwide Safety Approvals: 
IEC61010-1:2010
EMC: 
EN61000-6-4:2007, Class A
EN61000-6-2:2005

Ask for Assistance

Selecting the right power supply for your application is not a small task. Let our technical sales engineers guide you through the process of choosing the right solution for your needs.

Below some parameters usually required to size and select the right power supply:

  • Power & control requirements
  • Output & Input Voltage / Multioutput Voltage / Variable Voltage
  • Redundancy level
  • Mounting
  • Inrush Current
  • Environmental specifications (Temperature, altitude, vibration, shock)
  • Specific Industries Standards (Railway, Military, Medical)
  • Terminals

Contact Our Team

Contact our team of experienced engineers to discuss your unique power conversion and backup needs. We offer a wide range of highly reliable components that can be integrated and customized to create a solution that meets or exceeds your requirements.

For power automation systems please contact us at power.systems.automation@heliosps.com.au