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Earth-Rite® II FIBC Ground Monitoring System

Earth-Rite®

The Earth-Rite II FIBC system validates and monitors the resistance of Type C FIBC bags ensuring that the conductive elements of the bag are capable of dissipating electrostatic charges in compliance with IEC 61340-4-4.

Standard test methods for specific applications – Electrostatic classification of flexible intermediate bulk containers (FIBC) and NFPA 77 “Recommended Practice on Static Electricity”.

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Earth-Rite®

Standard test methods for specific applications – Electrostatic classification of flexible intermediate bulk containers (FIBC) and NFPA 77 “Recommended Practice on Static Electricity”.

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The Earth-Rite II FIBC system can be installed and setup to ensure that operators ground the bag before filling or emptying operations are started. During the bag filling / emptying process the Earth-Rite II FIBC system continuously monitors the resistance of the bag so that if it rises above the recommended upper monitoring resistance level* this dangerous situation can be indicated to operators and the process halted, either manually or via the system’s pair of NO/NC volt free contacts. This feature ensures the generation and accumulation of static charges on the bag is stopped mitigating the risk of an incendive electrostatic spark discharge.

To compensate for normal wear and tear on Type C bags it is important to ensure the bag maintains its capacity to dissipate charge and also ensure the ground connection between the bag and plant earth grounding point is functioning correctly. Newson Gale can also provide FIBC grounding systems that can validate and monitor Type C bags designed with an upper resistance threshold of 8 1 x 10 ohms (100 meg-ohm) or 7 1 x 10 ohms (10 meg-ohm).

Features and Benefits

Attention grabbing LEDs

Three green LEDs continuously pulse informing operators that the FIBC bag to be protected from static discharges is correctly grounded. When the system is not in use, or when it detects the resistance in the static dissipative loop is higher than the upper monitoring resistance level*, a red LED illuminates the indicator panel located in the static dissipative GRP indicator station.

Continuous Ground Loop Monitoring

Monitors the resistance of the static dissipative loop through the FIBC bag back to the Earth-Rite FIBC via the plant earth grounding point. If the system detects that resistance in the loop is higher than theupper monitoring resistance level*, it engages a pair of output contacts.

Two volt free output contacts

The primary contact can interlock with electro-mechanical devices or PLC systems to shutdown the flow of product. The secondary contact can interface with attention grabbing audible alarms or strobe lights to provide an extra degree of safety over the hazard.

Easy Installation

Simple to mount GRP enclosures complemented by straightforward cabling and PCB system wiring. Flexible hazardous area enclosure location options with separate IS monitoring / indicator and Power supply PCBs. Power supply PCB can run off both 240 V and 110 V mains / line supply and 24 V / 12 V DC voltage supply.

Technical Specifications

Power Supply & Monitoring Unit
XP (Class I, II, III – Div 1 Installations)

Power supply (AC version)	110/120 V or 220/240 V AC, 50-60 Hz 12 V or 24 V DC
Power rating	10 watt
Ambient temperature range	-40F to +12oF (-40C to +5oC)
Ingress protection	Type 4X (IP 66)
Weight	9.9 lbs (4.5 kg) nett
Construction	Intrinsically Safe
Monitoring Circuit	9.9 lbs (4.5 kg) nett
Operational Series Ground Resistance	≤ 1 x 10 or 1 x 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 ¾” NPT (supplied with 4 stopper plugs)
Enclosure Material	GRP with carbon loading
Terminals	2 x AWG #14 conductor capacity
Stowage Device	Insulated 0.79″ diameter pin
Cable Entries	1 x M20
Clamp Cable Connection	Quick Connect
Clamp Design	1 pole with single stainless steel contact
Body	Stainless Steel
Certification	Ex II GD T6
Cover	Cover Blue Cen-Stat Hytrel sheath (Static dissipative, chemical & abrasion resistant)
Clamp Design	1 pole with single stainless steel contact
Conductors	1 x AWG #12 steel
Length	16 ft (5m) extended, 3 ft (1m) unextended (other lengths available – please inquire)
Body	Stainless Steel
Certification	Ex II GD T6

Power Supply & Monitoring Unit
XP (Class I, II, III – Div 2 Installations)

Power supply (AC version)	108/125 V or 216/250 V AC, 50-60 Hz 12 V or 24 V DC
Power rating	10 watt
Ambient temperature range	-13°C to +131°C
Ingress protection	Type 4X, (IP 66)
Weight	3.3 lbs (1.5 Kg) nett
Construction	Carbon-loaded GRP
Monitoring Circuit	Intrinsically Safe
Operational Series Ground Resistance	≤ 1 x 10 or 1 x 10 Ohm
Output Relay Contact Rating	2 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 0.19″ diameter pin
Cable Entries	1 x M20
Clamp Cable Connection	1 pole with single stainless steel contact
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	1 x AWG #12 steel
Length	5 metres extended, 1 metre unextended (other lengths available, please inquire)
Length	32 ft. extended, 3 ft. unextended (other lengths available – please inquire)

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
Bond-Rite REMOTE
OhmGuard (both 10 ohm and 100 ohm variants)

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.