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Earth-Rite® II Plus Ground Monitoring System

Earth-Rite®

Precision and reliability is what the Earth-Rite II PLUS provides to HAZMAT professionals and engineers who are tasked with protecting personnel and plant assets from the ignition hazards of static electricity during tank car, LACT & skid unit and tote loading/unloading operations.

Conductive metal objects like tank cars, LACT units, skids, totes, and IBCs that come into contact with electrostatically charged liquids can accumulate hazardous levels of electrostatic charge that could discharge static sparks with energies far in excess of the minimum ignition energies of a vast range of combustible gases and vapors. The ignition of combustible atmospheres by static electricity can be prevented by ensuring that such objects are grounded.

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Earth-Rite®

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The Earth-Rite II PLUS is the ideal solution for grounding and bonding a broad range of equipment at risk of igniting combustible gases and vapors. In combination with demonstrating the full range of Class I, Div. 1 approvals for all gas and liquid vapor groups, the Earth-Rite II PLUS ensures a continuously monitored 10 ohm, or less, connection is present between the grounded object and a designated true earth grounding point. This feature provides equipment specifiers with the ability to demonstrate compliance with the grounding and bonding recommendations of NFPA 77*, API RP 2003* and IEC 60079-32*. *NFPA 77, “Recommended Practice on Static Electricity.” *API RP 2003, “Protection Against Ignitions Arising Out of Static, Lightning, and Stray Currents.” *IEC 60079-32, “Explosive atmospheres: electrostatic hazards, guidance”.

Attention Grabbing LEDs

Three green LEDs continuously pulse informing operators that the object to be protected from static discharges is grounded. When the system is not in use, or when it detects the resistance in the static grounding path is higher than 10 ohms*, a red LED illuminates the indicator panel located inside the XP enclosure.

Continuous Ground Loop Monitoring

Monitors the resistance of the ground loop from the grounded object through ® to the site’s verified true earth grounding point. If the Earth-Rite PLUS detects that resistance in the ground loop is higher than 10 ohms*, it engages a pair of dry output contacts that can be interlocked with the product transfer system.

Two dry output contacts

The primary contact can be interlocked with electro-mechanical devices or PLC systems to shut down the flow of product. The secondary contact can interface with attention grabbing audible alarms or strobe lights to provide an extra layer of protection over the hazard.

Easy Installation

Simple “bolt-on” enclosures complemented by straightforward cabling and PCB system wiring requirements. Flexible hazardous location enclosure options and power supplies which can run off both 240 V / 110 V AC and 24 V / 12V DC.T

Technical Specifications

XP (Class I, II, III – Div 1 Installations)

Compliant with IEC 60079-32-1 & NFPA 77	The monitoring set-point of 10 ohms resistance is compliant with the standards for static control in hazardous areas: IEC 60079-32-1 & NFPA77.
Operator friendly interface	Simple GO / NO GO indication informs operator when the road tanker is connected to ground. When a positive ground connection is made the pulsing hi-visibility indicators are activated during the MODE 3\| Continuous Ground Loop Monitoring stage.
Control / Interlock capability (Two dry output contacts)	The first output contact can be used to interlock with flow control devices (e.g. pumps, valves, PLCs) to ensure product cannot flow unless the RTR has established a ground path for the tanker truck. The second output contact can operate attention grabbing devices (e.g. strobe lights) to warn personnel that a hazardous product transfer is underway. * Optional Intrinsically safe switching PCB is also available,
Wide operating temperature range	The RTR system can operate in extreme weather conditions without modifications or enhanced protection: -40°F to +122°F.
Detachable Clamp & Cable	Quick Connect system provides flexible and easy removal of grounding clamp and cable from the hazardous area for maintenance.
Universally Approved Enclosure	Suitable for installation in the highest range of gas and vapor environments.

Power Supply & Monitoring Unit

Power Supply	110/120 V or 220/240 V AC, 50-60 Hz 12 V or 24 V DC
Power rating	10 watt
Ambient temperature range	-13°F to +131°F (-25°C to +55°C)
Ingress protection	Type 4X, (IP 66)
Weight	4.4 lbs (2 Kg) nett
Construction	Carbon-loaded GRP
Monitoring Circuit	Intrinsically Safe
Operational Series Ground Resistance	Nominally ≤10 Ohm
Output Relay Contact Rating	2 off dry contacts, 250 V AC, 5 A, 500 VA max resistive 30 V DC, 2 A, 60 W max resistive
I.S Switching PCB (NAMUR compatible)	30 V DC, 500 mA Li = 0H, Ci = 0F Optional extra – See system options
Cable Entries	7 x M20 (4 x plugged)
Enclosure Material	GRP with carbon loading
Terminals	2 x AWG #14 conductor capacity
Stowage Device	Insulated ¾” Ø pin
Cable Entries	1 x M20
Clamp Cable Connection	Quick Connect
Clamp Design	2 pole with tungsten carbide teeth
Body	Stainless Steel (SS 304)
Certification	Ex II 1 GD T6
Approval	FM Approved
Cover	Cover Blue Cen-Stat Hytrel sheath (Static dissipative, chemical & abrasion resistant)
Cable	Blue Cen-Stat Hytrel sheath (Static dissipative, chemical & abrasion resistant)
Conductors	2 x AWG #18 copper
Length	32 ft. extended, 3 ft. unextended (other lengths available – please inquire)

System Options

Newson Gale supplies a range of product options that enhance the control and general safety of transfer processes and aid engineers with system installations and routine system service checks. Contact Newson Gale or your local Newson Gale representative for more information on the range of options available.

Universal Resistance Tester

The URT is designed to provide owners of Newson Gale Earth-Rite and ® Bond-Rite static grounding systems with a means of regularly testing the grounding settings for their system on a routine basis.

Periodic testing with the URT verifies that the grounding system’s GO/NO GO settings are working in compliance with the recommendations of:

NFPA 77: “Recommended Practice on Static Electricity.

IEC 60079-32-1: “Explosive atmospheres. Part 32-1: Electrostatic hazards, guidance.”

The easy to use tester consists of a pair of switches that enable an electrician to set up the resistance level at which the grounding system should be working and conduct a PASS / FAIL test at the required setting.

Earth-Rite and Bond-Rite products that can be tested with the URT:

Earth-Rite II PLUS
Earth-Rite II FIBC (both 10 meg-ohm and 100 meg-ohm variants)
Bond-Rite CLAMP
Bond-Rite EZ
BBond-Rite REMOTE
OhmGuard (both 10 ohm and 100 ohm variants)

Retractable Cable Reel

The Retractable Cable Reel is supplied for grounding system installations where customers want to ensure the grounding clamp and cable are returned to the static grounding system by operators and drivers on completion of the product transfer process. The reel can be used in conjunction with the Earth-Rite II RTR, Earth-Rite II MGV and Earth-Rite II PLUS.

Certified for ATEX Zone 1 and 21 hazardous areas.
Self-retracting with up to 15 m (50 ft.) of Hytrel protected cable.
Silver plated ultra low resistance slip ring contacts.

Ex Strobe Light

The strobe light is mounted in an elevated position and when the equipment is correctly grounded, flashes continuously informing personnel that a transfer process is underway and is protected from the static hazard. The strobe light can be used in conjunction with the Earth-Rite II RTR, and

Earth-Rite II PLUS.

ATEX and Class/Div approved versions
Bond115 V / 230 V AC and 24 V / 48 V DC options
Amber, Green & Red strobe colour options

Intrinsically Safe (I.S) Switching PCB

The I.S Switching PCB is an additional circuit board added to Newson Gale system enclosures that enable users to directly interface with, and switch intrinsically safe circuits without the need for additional equipment. The I.S Switching PCB is designed not to affect the I.S signals electrical parameters and is compatible with the Earth Rite II RTR, MGV, PLUS and FIBC platforms.

30 V DC, 500 mA
Li = 0H, Ci = 0F
Suitable for Ex ia, ib, ic rated instrinsically safe circuits only
NAMUR Compatible

Sun Shield

Designed for operating environments subject to intense sunlight, the ERII Sun Shield prevents direct sunlight hitting the indicators on the Earth-Rite II RTR and Earth-Rite II PLUS static grounding systems.

The Sun Shield casts a shadow over the indicators during peak sunlight hours so that operators can easily view the ground status indicators. The shield is constructed from stainless steel and can be fitted to any installation in a matter of minutes.

2-Pole Surface Mountable connector

With this assembly operators tasked with earthing mobile process equipment will have a dedicated earthing point to attach the easy to use screw thread connector. The ‘plug and play’ connector can interface with all Newson Gale 2 core systems to provide earth monitoring capability on a wide range of mobile processes and equipment where generic earthing clamps cannot be used.

The conical shape design prevents powder deposit build up over time and aids in clean down operations.