LEM SATURN 100 plus Instrucciones De Uso página 43

Measuring
Function
Display Meaning
Fl-Circuit No measurement
Breaker Test possible, Fl circuit
Fl breaker has tripped
during pre-testing in
Phase 1
No measurement
possible, Fl circuit
breaker has tripped
during pre-testing in
phase 2.
Fl circuit breaker failed
to trip at I ∆N within 200
ms
Early tripping in phase
1 or 2
Contact voltage > 50 V,
hence no tripping test.
Early tripping in phase
1
A
Measure- Contact voltage > 100
ment of V, hence no
earthing / computation possible
grounding and no tripping test.
resistance
Overrange
R A
A
No measurement
possible
Legend: = flashing display
Notes
Fl circuit breaker defective,
trips at less than 50% I ∆N
High leakage currents in
system + pre-testing current
trip Fl circuit breaker.
Incorrect test current set
Leakage current in system +
50% I ∆N trip Fl circuit
breaker defective, trips at
less than 50% I ∆N .
Fl circuit breaker defective or
misconnected. Possibly
repeat selective Fl test with
S
Fl. Incorrect test current
set. Insulation fault between
zero wire and PE.
Fl circuit breaker defective,
trips at less than 50% I ∆N
Leakage currents in system +
50% I ∆N .
Earthing / grounding too high,
incorrect test current
selected.
Incorrect test current
selected, bias loads in
network (e.g. fault currents)
Earthing / grounding too high,
possibly incorrect test current
selected
Incorrect range selected or
earthing / grounding
resistance greater than 10
kΩ
Measuring circuit interrupted
(e.g. Fl has tripped)
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