DC Switch Tripper/Battery Charger 

PB Design is recognised as a leader in the design, manufacture and application of standby power systems. Since its foundation in 1979, the company has developed a leading-edge range of battery chargers and uninterruptible power supplies covering a full range of AC and DC standby power requirements.

PB Design has installed and commissioned its DC switch tripping/closing systems in electrical substations around the world for the past 40 years, in environments ranging from equatorial deserts to arctic tundra. The systems have justifiably earned a reputation for the highest reliability, availability and performance levels, even in the most hostile of environments.

  • Constant-voltage battery chargers provide low maintenance and high reliability
  • The alarm system includes SCADA interfaces for easy control integration
  • Choice of batteries from Vented or Valve Regulated Lead Acid (Sealed Lead Acid) to Vented Nickel Cadmium and Valve Regulated Nickel Cadmium to cover all applications
  • Designed manufactured in the UK to various international supply authority standards.


  • Thyristor (SCR) based for high reliability and long design life (>20 years)
  • Output voltages: 24, 30, 48, 60, 110, 220V
  • Single or three-phase input supply
  • Current ratings from 2A to 300A
  • Suitable for Vented or Valve Regulated Lead Acid (also referred to as Sealed Lead Acid), Vented Nickel Cadmium and Valve Regulated Nickel-Cadmium batteries
  • Digital meter showing voltage or current
  • Microprocessor-based alarm controller

Options available:

  • Choice of enclosures and paint colours
  • Integrated or external DC distribution
  • Choice of system alarm monitoring from entry-level to advanced features
  • Battery string monitoring
  • Dual charger capability for redundancy
  • Additional 8 no. volt-free relay outputs for Scada interface

DC Switch trippers combined with proven constant voltage battery charging technology, a choice of batteries and state of the art digital controllers, ensure you are installing the best possible protection for you or your client’s critical load requirements.

Standard outputs are available from 24 to 220V DC with other bespoke power outputs which can be made to order.

The integrated units are supplied in rugged mild or stainless steel cubicles or 19” racks, with standard ingress protection to IP31. Smaller wall mounted units are available where substation or plant room space is at a premium. The advanced control system incorporates digital metering of various battery parameters and a monitoring system that combines visual and audible indication with a selection of SCADA interfaces for external monitoring.

General Transformer Range

Distribution Liquid l Distribution Cast Resin l Medium Power l Power l Earthing l Rectifier l Motor Start l Phase Shift l Generator l Voltage Regulating l Auto l Multi-Tap ESP l Reactors l Solar l Wind Turbine l Furnace l Dual Ratio

Delivering Network Resilience and Reliability