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Static Control System for Safe Road Tanker Loading in Hazardous Locations
Earth-RiteRTR with tri-mode sensing
Verifies tanker type personality
Confirms good static ground connection before connecting tanker
Monitors low resistance static path from tanker to ground during loading
Provides interlock control contact
Red/green LED status indication
Meets NFPA 77 recommended practice
Intrinsically safe sensing circuit
CSA U.S. and Canadian approvals
ATEX, IECEx certification
Easy to install & operate
Earth-Rite RTR is the most advanced Tanker Truck Grounding System for protecting personnel and plant assets from static discharge hazards during loading & offloading operations. Tri-mode sensing insures that product transfer can only commence and be sustained when three key provisions are met.
Mode 1 • Tanker Truck Personality Recognition Confirms RTR clamp is correctly connected to the tanker itselfnot falsely connected to other conductive metal objects such as the loading gantry or other parts of the truck not bonded to the container.
Mode 2 • Static Ground Verification Confirms RTR clamp is connected to a verifiable static dissipative grounding point.
Mode 3 • Continuous Ground Loop Monitoring Confirms clamp connection and ground connection is good throughout the transfer process by insuring loop resistance does not exceed 10Ω.
Operator friendly interface provides GO / NOGO indication when the tanker is correctly grounded. Bright pulsating green LEDs are activated during the MODE 3 continuous ground loop monitoring stage.
Control / Interlock capability includes two relay contacts for pump, valve, and PLC control integration, plus connection to devices such as strobe lights and horns confirming transfer is under way.
Compliance with NFPA77 and CENELEC CLC/TR: 50404 to insure less than 10Ω ground loop resistance.
Hazardous location approvals includes CSA for the U.S. and Canada, compliance with the ATEX Directive for use in the European Community, and certification to IECEx standards for other international users.
Earth-Rite RTR Basic Specification
Approvals & Certification
CSA US & Canada "Division Approval": Cl I Div 1 Grps A-D; Cl II Div 1 Grps E,F,G; Cl III Div 1 CSA US "Zone Approval": Class I, Zone 1, AEx d(ia) IIC T4; Class II, Zone 21, A21, IP66, T80C CSA Canada "Zone Approval": Class I, Zone 1, Ex d(ia) IIC T4; DIP A21, IP66, T80C
ATEX/IECEx: Ex d[ia] IIC T6 Gb(Ga), Ex tb IIIC T80C IP66 Db, Ta= -40C to +55C
Clamps
Body material: 304 stainless steel
Contact points: two, tungsten carbide
Body length: 9"/235mm
Cable
Hytrel coated spiral dual conductor cable, fitted with in-line quick-connects.
Monitored Resistance
10 ohms upper limit.
Status Indication
Red / green LED indication.
Power Supply
AC powered version: 110/120V or 220/240V AC 50-60 Hz
DC powered version: 12V or 24V DC
Output Relay Contacts
Two voltage free change-over switch contacts, 250VAC, 5A, 500VA max. resistive load