ABB Switzerland Ltd REG 316*4 1MRB520049-Uen / Rev. F
3-228
III. Binary outputs:
· alarm stage pick-up
· alarm
· trip stage pick-up
· trip
· 2nd. parallel star-point
· MTR adjustment active
· REs adjustment active
· injection open-circuit internally
· injection open-circuit externally
IV. Measurements:
· ground fault resistance Rfs
· measurement transformer ratio MTR"
· grounding resistor REs".
Explanation of measurements:
Rfs:
Ground fault resistances between 0 and 29.8 k
W can be de-
termined and displayed. A display of 29.9 k
W or 30 kW indi-
cates a ground fault resistance >29.8 k
W. A value of 29.9 kW
or 30 kW is displayed when there is no ground fault.
A whole number fault code between 100 and 111 is displayed
in cases when it is not possible to compute the ground fault
resistance.
· 100.0 means no injection for more than 5 s.
· 101.0 means incorrect frequency. Either the injection fre-
quency on the REX 010 or the rated frequency on the
REG 316*4 is incorrectly set.
· 102.0 means external open-circuit.
· 109.0 means that both the binary inputs ‘AdjREsInp’ and
‘AdjMTRInp’ are enabled.
No other codes will normally be generated, but if they are,
they are a diagnostic aid for service people.
MTR":
The value measured for MTR is displayed when the input
‘MTR-Adjust’ is enabled.
During normal operation, the value entered for MTR via the
HMC is displayed.
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