Emax UL
30/132
L2275
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
B
A
D
C
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E
F
G
S
T
Q
N
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P
M
L
H
R
Fig. 35
Fig. 36
12.4.5.1
Selection of the threshold value
For correct setting of protection Iinst, linked to the size of the power circuit breaker, work on the 10 relative dipswitches located on the top part
of the trip unit (see Figure 35), consulting the label placed to their side.
The protection, which can only be set by ABB personnel,
cannot be excluded.
In the diagrams of the label relative to the settings, the
position of the dipswitch is indicated by the white part.
In the diagram at the side, the dipswitch
is set to the top position (Off)
Modification of the set threshold can lead to permanent damage of the power circuit breaker and of the installation itself,
with consequent damage to the operator.
12.5 Other functions
12.5.1 Watchdog
Operation of the management circuits of the PR111/P-A, and the relative SW, are constantly monitored from a special control circuit (inside the
microcontroller) in order to prevent it blocking during operation.
12.5.2 Simple test of the trip unit
Using the TT1 test unit (see par. 12.11.1) connected to the special dedicated test connector (see ref. G Fig. 36), it is possible to check correct
operation of the activation chain (microprocessor, cabling and SA). In the case of a positive outcome, the power circuit breaker is opened. The
function is only available with nil busbar current.
12.5.3 Complex test of the trip unit
Using the PR010/T test unit (see par. 12.11.2) connected to the trip unit by means of the front TEST connector (see ref. H Fig. 36), it is possible
to carry out a complete series of tests, with reports which can be downloaded to a PC.
12.6 User interface
Caption for the front of the PR111unit:
linst setting dip-switch
lins
t se
tting
lab
el
