Protect your system from second ground faults

with the industry’s only I-Gard SMART HRG

UngroundedUngrounded
High Resistance GroundedHigh Resistance Grounded
Solidly GroundedSolidly Grounded
High Resistance GroundedHigh Resistance Grounded
High Resistance GroundedHigh Resistance Grounded
I-Gard Smart High Resistance GroundedI-Gard Smart High Resistance Grounded

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STANDARD HRG TO I-GARD SMART HRG

STANDARD HRG
BENEFITS

  • Continuity of operation under single ground fault condition
  • Ability to easy locate ground faults via pulsing capability
  • Reduce damage on equipment by limiting damaging ground fault current to low levels, typically 10 A or less
  • Reduced probability of an arc flash incident

I-GARD SMART HRG
INCREASED BENEFITS

  • Continuity of operation of critical processes under second ground fault condition
  • Faulted phase and feeder indication enables safer and quicker fault location
  • Can monitor up to 50 feeders with 16 trip priorities
  • Option for First Fault Trip, First Fault Time Delay or First Fault Alarm Only
  • Arc flash detection module DSP-ADM reduces the impact of an arc flash

What are the I-GARD SMART HRG features and benefits?

Click on the letters below to reveal what the acronym stands for.

Selective Instantaneous Feeder Trip (SIFT) on 2nd Ground Fault

Mitigate 95-98% of arc flash incidents on 1st phase-to-ground fault

Assisted fault location through pulsing system and indication/alarm of faulted phase and feeder

Resistor integrity monitoring. It continuously monitors neutral and resistor continuously to meet the new CSA code requirement.

Time Selective feeder isolation. Feeders can be programmed to trip on 1st fault, 1st with time delay, trip on 2nd fault. It allows the user to set priority levels

Grounding Methods COMPARISON CHART

metre
Ungrounded
Solidly
Grounded
Standard HRG
Advanced HRG I‑Gard Smart
Process continuity under ground fault condition

Ungrounded

Y

Solidly Grounded

X

Standard HRG

Y

Advanced HRG I-Gard SMART

Y
Control transient overvoltages

Ungrounded

X

Solidly Grounded

Y

Standard HRG

Y

Advanced HRG I-Gard SMART

Y
Ability to locate ground fault

Ungrounded

X

Solidly Grounded

Y

Standard HRG

Y

Advanced HRG I-Gard SMART

Y
Process continuity of critical process with second ground fault

Ungrounded

X

Solidly Grounded

X

Standard HRG

X

Advanced HRG I-Gard SMART

Y
Arc Flash Mitigation for safety

Ungrounded

X

Solidly Grounded

X

Standard HRG

X

Advanced HRG I-Gard SMART

Y
Contact i-Gard today and one of our specialized engineers will be happy to discuss upgrading your specific system.

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905-673-1553

1-888-737-4787

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Why the concern over a Second Ground Fault?


According to IEEE 242-2001 Section 8.2.5. Ungrounded Systems: A second ground fault occurring before the first fault is cleared results in a phase-to-ground-to-phase fault, usually arcing, with current magnitude large enough to do damage, but sometimes too small to activate the overcurrent devices in time to prevent or minimize damage.

On standard HRG systems, a second ground fault on a different phase will lead to a phase to ground to phase fault requiring the entire system to shut down with loss of continuity and possible losses of material in process.

High Resistance Grounding is a proven technology that provides process continuity even under a single ground fault condition.

The SMART HRG from I-Gard is the only HRG system that ensures process continuity of your most critical processes even under second ground fault conditions.

The SMART HRG system offers feeder indication and second fault protection which ensures that your most critical process is operational at all times, providing an opportunity for increased revenue.

The SMART HRG system can be configured with the time delay feeder trip.

Feeder indication of a ground fault shortens the time needed to find a fault and removes personnel from the risk involved in starting the search at the main switchgear.

  • Feeder identification feature provides information of where to start looking for a ground fault.
  • With feeder time delay you control how long the ground fault is on the system and reduce the likelihood of a second ground fault.

The SMART HRG solution offers HRG and Arc Flash Mitigation functions in the same system.

  • Once a certain level of light produced by an arc flash event is detected, the I-Gard sensors react in 1 milliseconds sending a trip signal to the relay.
  • Detecting and interrupting an arc flash as quickly as possible reduces the incident energy levels and ensures workplace safety.

I-Gard Smart HRG Systems


DSP-OHMNI SYSTEM

dsp-ohmni-modules.png->descriptionDSP-OHMNI system and DSP-TDM Touchscreen Display Module
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Pulsing and Modular Ground Fault and Arc Flash Protection System

  • Phase and feeder indication resulting in quicker fault location
  • Monitors and protects up to 50 feeders on one relay
  • Available 1st fault alarm, 1st fault trip or 1st fault delay trip
  • Unique Selective Instantaneous Feeder Trip (SIFT) on occurrence of 2nd ground fault, selective tripping based on up to 16 different priorities.
  • MODBUS RTU, TCP/IP communication available via Touchscreen Display Module (TDM)
  • Arc Flash Detection Module (DSP-ADM)

SENTINEL

Multi-Feeder Ground Fault Relay

  • Multi-feeder ground fault alarm indication with 2nd ground fault protection
  • DSP-OHMNI relay inside
  • Main-Tie-Main coordination
  • Arc Flash Detection Module (DSP-ADM)
  • NEMA 2 enclosures contains current limiting resistor and ground fault relay with isolation switch
  • NEMA 3 option available
Sentinel SMART HRG systemSentinel SMART HRG system
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I-Gard SMART HRG DIAGRAM


Smart Diagram

DSP-ADM, ARC-FLASH DETECTION MODULE

  • Uses air pressure and light sensors to detect and initiate a trip signal in presence of electric arcs
  • Continuously monitors 21 possible fault sources

Resources


Webinar Recording & Presentation: SMART HRG vs Standard HRG (April 28th, 2020 Webinar)

  • Webinar Recording & Presentation: SMART HRG vs Standard HRG (April 28th, 2020 Webinar)
  • SMART (Advanced ) HRG vs Standard HRG
  • International Association of Electrical Inspectors Case of Advanced HRG
  • The Case for Advanced (SMART) HRG
  • UL E107725 1.8 Certification
  • Case Study: Ungrounded to HRG in Food and Beverage Segment
  • Case Study: Healthcare best practices: A consultant’s Perspective
  • Case Study: Ungrounded to HRG in Industrial and General Segments
  • Case Study: Making Mining Safer and More Reliable
  • Case Study: Solid Grounded to HRG in Pulp and Paper Segment