ST950S Plus+ Installation and Commissioning Manual
Table 38. Smartloop Variant Selection Table
Variant
Example Loop Type
Loop Inductance
/001
Low inductance values and/
or short feeder lengths (this
is the usual variant required
for most site installations)
Approx. 20 – 150µH
/002
Medium inductance values
and/or medium feeder lengths
Approx. 150 – 300µH
/003
High inductance values
and/or high feeder lengths
Approx. 260 – 2000µH
Loop feeder length is normally in the range of 0 - 300M but is extendable up to 1000M where the
recommended loop cable core size is 1.5 mm
2
or 2.5 mm
2
.
The following provide a guide for users:
•
Short feeder <100m
•
Medium feeder 100-300m
•
Long feeder >300m
The use of resin (torpedo) joints, or other cable connection methods, should ensure that any loop
feeder/tails or Plus+ network connection can be achieved in a secure and waterproof manner. The use
of other cable connections are also applicable, for example ‘bottle’ joints.
Important:
When using bottle joint ensure that it is mounted vertically to ensure it remains waterproof.
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