Introduction:
The Loading and Unloading of tank trucks, containers, mixers etc., containing flammable or combustible products has long been reconginzed as one of the most serious fire and explosion risks for hazardous industry operations. The primary guidelines are detailed in three primary standards: NFPA 77, API RP 2003 and CLCTR: 50404. An understanding of these standards and of current technology in static discharge prevention can contribute greatly to preventing tank truck load transfer incidents. The standards advise that a grounding system, which can measure and monitor resistance in the grounding circuit, can be utilized. The system should verify if the ground connection to the tank truck is complete before loading or unloading is initiated.
Specifications:
| Inputs | 1.True Earth Point at Loading area
2.Probe from Body of Earthed Tanker |
| Resistance Bandwidth | Range 10 Ohms |
| Protection | Intrinsically Safe |
| Output | Control Relay |
| Contacts | Two Relay Change over NO Contacts (Potential Free) |
| Contact Action | Relay Contacts to Change over when Equipment body is at same potential as identified
TRUE EARTH (Properly Earthed) |
| Indication | GREEN LED = Healthy Earth, RED LED = Unhealthy Earth |
| Relay Operation | GREEN LED = Healthy Earth, RED LED = Unhealthy Earth |
| Power Supply | 230V AC Input |
| Circuit Protection | Fuses (Internal Protection of the Circuit) |
| Certification | CIMFR / PESO – FLP & Intrinsic Safe Circuit |
| Equipment Marking | Ex D, Zone 1,2 IIA IIB IP66 |
| Ingress Protection | IP 66 |
– SS304 Clamp & 1 nos. of PU Anti-Static Spiral
Cable for the Safe Connection to the Equipment Body
– PCB Mounted in Hazardous area Certified FLP Enclosure.
