13
System Safety Layout
Conduit/ducting requirements are dependent on local electrical regulations.
Substitution of components may impair intrinsic safety. Probe, probe wiring and con
-
sole wiring are intrinsically safe only when connected via this barrier.
Field Cable Ducting / Cable Trays
Explosion could occur if other wires share ducts with intrinsically safe cir
-
cuits. Ducting from probes or sensors must not contain any other wiring.
FAILURE TO COMPLY WITH THE FOLLOWING WARNINGS AND SAFETY PRECAU
-
TIONS COULD CAUSE DAMAGE TO PROPERTY, ENVIRONMENT, RESULTING IN SE
-
RIOUS INJURY OR DEATH.
Minimum diameters for underground probe ducting are:
• Up to 20 cables -100 mm diameter
• Up to 50 cables -150 mm diameter
Run suitable diameter cable ducting and / or cable trays from the TLS Console to each Mag-FLEX probe location.
For underground tanks, all cable duct entry points must be sealed to prevent the escape of hydrocarbon vapour
and liquid and the ingress of water. Cable duct & cable tray plans must be designed to suit local site requirements
and must conform to local/national regulations and industry standards.
For multiple TLS installations, the Mag probe and Mag-FLEX cabling for one TLS system must be contained in
separate cable duct or tray to those cables belonging to another TLS system. Combining cables from different TLS
systems will be in violation of the intrinsically safe approval for this system and is not permitted. Combining cables
from different systems may also result in improper system operation.
Unless specified otherwise, any draw pits should be sited at 10 metre intervals or where acute cable duct angles
are unavoidable.
Ensure that all ducting is equipped with cable pull through ropes and that all visible cable ducts are properly fixed
and finished off in a neat and tidy manner.
All above ground cable runs should be properly secured and adequately protected from accidental damage.
Cable Specifications For Intrinsically Safe Apparatus Cabling
Cable must be installed to comply with local and national regulations in force at the time of installation. It is the
Installer’s responsibility to ensure that the installation complies with all relevant local and national legislation and
codes of practice.
Do not run the Mag-FLEX probe cable from the tank to the TLS Console in the same cable duct as non-intrinsically
safe wiring.
Gilbarco Veeder-Root requires the use of shielded cable for Mag-FLEX cabling. The cable must have a minimum
conductor CSA of 0.75 mm² and must meet with intrinsically safe system installation requirements. The cable
capacitance, inductance and L/R ratio must conform to the intrinsically safe output characteristics of the TLS
Console and the intrinsically safe input characteristics of the Mag-FLEX probe.
Field Cable, ATG to Probe 2 x 0.75 mm² shielded: i.e. Gilbarco Veeder-Root cable p.n. 222-001-0029.
The TLS Console to Mag-FLEX probe cable length must not exceed 300 meters.
NOTICE
WARNING
WARNING
WARNING
NOTICE
Содержание Mag-FLEX
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