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User Guide
Fault symptoms
The types of faults comprise:
• One or more of the conductors disrupted (open circuit).
• Short circuit between two or more conductors.
• Combination of disruptions and short circuit.
The table below show the symptoms for a given combination of heating cable and type of fault.
Cable
Fault
Single conductor
with screen
Twin conductor
without screen
Twin conductor
with screen
= No action!
= Not possible!
16 | ©Danfoss | FEC | 2022.07
DEVItector™ II V2
Disruption of
Screen
Will not show
No heat
Fault no. 1
No heat
Fault no. 2
Will not show
No heat
Fault no. 1
Conductor
Screen and
(L or N)
Conductor
RCD-relay cut off
or fuse is burnt out
Fault no. 3
RCD-relay cut off
or fuse is burnt out
Fault no. 4
Short circuit between
Conductors
(L and N)
Fuse is burnt out
Fault no. 5
Burnt fuse
Fault no. 5
BC421332622232es-ES0101
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