Post Glover’s PulserPlus Pro Reduces Risk of Arc Flash by 98%
 

The electrical industry generally accepts that 98% of all electrical system failures begin as ground faults. Such failures typically require that equipment be taken offline, creating lost productivity (and profits) due to unplanned downtime. Post Glover’s PulserPlus Pro keeps plants running 24/7/365.

High-resistance grounding (HRG) limits the fault current so that ground faults do not develop into more serious equipment problems or potentially deadly arc flashes. With a high-resistance-grounding system:

  • There is no need to immediately trip the system, allowing continued process operation and orderly management of downtime.

  • Thermal damage to equipment is dramatically limited due to the low fault current.

  • Overall plant safety is improved since arc flash hazard is reduced by 98%.

  • Ground faults are easy to locate and repair, saving maintenance time and money.

The PulserPlus Pro further enhances this already proven technology by adding features not available in many existing systems:

  • Both under-voltage and under-current detection and alarm—you don’t need to choose between them anymore.

  • Pulse rate adjustable from 10 to 50 pulses per minute, allowing for custom setup within your system, which lets you differentiate between noise and leakage currents.

  • Two separate, adjustable time-delay settings, one fundamental and one for third harmonics, to prevent nuisance alarms or trips.

  • Alarm and form C contacts to allow remote monitoring and alarm for ground fault, high harmonics, loss of ground, and discretionary contact. Three sets of dry contacts are included for indication of system changes. One set each is provided for ground fault, high harmonic content, and loss of ground indication.

  • Full generator-winding protection provides third-harmonic trip to allow protection of the generator. All generators produce a small amount of third harmonics caused by fractional-pitch windings. In the event of a fault near the neutral of a wye generator, these values will drop. Separate set points for third-harmonic under-current and under-voltage levels can be used to alarm this condition.

  • High harmonics filtering and detection with third-harmonic over-voltage and over-current trip.

  • Factory-installed communications features, including the ability to integrate into network monitoring and protection systems via RS232, Modbus, or Ethernet protocols.

  • Data-logging for fault isolation and trending data.

The PulserPlus Pro is available in either a full-height, free-standing enclosure or a smaller unit suitable for wall-mounting. Standard designs are manufactured for limiting fault currents to less than 10 amps, with the ability to be adjusted in the field by the customer to a lesser value (if the system charging current permits).

Post Glover’s PulserPlus Pro is the only digital high-resistance grounding system with pulsing available today. Engineered for use up to 600 V and available in indoor or outdoor enclosures, Post Glover HRG systems can be used to protect either wye or delta-connected systems. The third-generation PulserPlus Pro represents the state of the art in network-grounding protection. Talk to a McNaughton-McKay sales engineer to learn more and see how PulserPlus Pro HRG systems can enhance your application.