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3 hanging protection functions
This paragraph enables the user set the protection functions implemented the PR121/P unit.2 Initial settings
ABB SACE will see applying the adhesive labels the PR121/P for all the variables relating the circuit-breaker (e.
E.7.5.
It should noted that ABB SACE provides sensible definition for each possible setting (see par. 2
Page No. 12.
C ith .5. 12. 12. 12.m°.
Before putting the PR121/P into service, nonetheless absolutely essential for the user carefully define each param eter
that can changed.5. ccu 5In and 4In. Description
13 DIP switch for setting trip time and type curve
14 Position indicator for the DIP switches for the mains frequency
15 Position indicator for the DIP switches for setting the neutral protection
16 Rating plug
17 Position indicator for the DIP switches for setting the threshold I1
18 Position indicator for the DIP switches for setting the threshold I2
19 Position indicator for the DIP switches for setting the threshold I3
20 Position indicator for the DIP switches for setting the threshold I4
21 Position indicator for the DIP switches for setting the time t1
22 Position indicator for the DIP switches for setting the time t2
23 Position indicator for the DIP switches for setting the time t4
24 DIP switch for setting the mains frequency and adjusting the neutral protection
25 Test" test and info button
26 Test connector for connecting testing the release using external device (PR030/B battery unit, BT030 wireless
comm unication unit and SACE PR010/T unit)
27 Serial number the PR121/P protection release
12.
An example how set the DIP switch for the protection function given below, where 2000A:
Frequency lnN
x I
60 Hz
50 B
II 0,4 0.
12.3.
12.5.g. Type circuit-breaker,
Rating Plug size, etc.
38/158
.Ref.
Model 2234 Apparatus Scale
L 2778
Doc.5) relating the settings, the position the DIP itch indicated the hite part.g.
12.1 Exam ple settings
In the diagram the fron plate (see par.1 Trip Test
Before you start, advisable run test ("Trip Test") the whole chain pressing and holding the button Test" for least positive outcome
is shown the circuit-breaker opening (see Watchdog).5. Only the setting methods and which values can
be selected are explained here.). For all other information the technical characteristics the protection functions, see par.5.4).025 In
Il 850A
t 3s@ 2.
A param eter settings can ade the PR121/P unit alarm conditions.: 1In and 1In, the relay sig ttin siste cy" error.2.550A (3*l1) Frequency Hz
I 50%n
A lty fig tio itc ttin rro ich sig lle LED (see
par. able the test, you need connect the PR030/B battery unit.1)
