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Emax UL
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15.2.10.2 Programming contacts K51/1 …. K51/8 of the PR020/K
Using a PR020/K, connected to the PR113, the user has the possibility of combining up to 7 different situations, selectable from the previous table
(Table 9), with the relays available in the PR020/K itself.
It is also possible to connect two or three PR020/Ks with the PR113.
The only points to note are that the Vaux must be common to all the PR020/Ks, and that one must be configured as master, whereas another as
slave.
In this way it is possible to activate up to (7 + 8 + 3 =) 18 contacts without potential (relay), plus 6 replicated, (see par. 15.7.2).
15.2.10.3 Watchdog
The PR113 unit provides some watchdog functions able to guarantee correct management of the trip unit malfunctions. These functions are as
follows:
!
Watchdog of correct operation of the microprocessor (by means of a Watchdog signal generated by the microprocessor). In the case of a
fault, signaling takes place by means of the front “
µ
P Fault” LED lighting up (also operational in self-supply) and closing of the monostable contact
k51/
µ
P (only with Vaux).
!
Watchdog for presence of Auxiliary power supply.
Signaling by means of front ‘Vaux ’ LED.
!
Watchdog for correct connection of the current sensors (CT). In the case of a fault, signaling takes place by means of a special alarm message
and the “emergency” LED lighting up.
!
Watchdog for correct connection of the opening solenoid (SA). In the case of a fault, signaling takes place by means of a special alarm message
and the “emergency” LED lighting up.
15.2.10.4 Self-Test
!
User interface devices with the “Self-test” function. Select [On] and press ¿ to check correct operation of:
•
Display (all the pixel of the matrix light up)
•
Contrast (this is decreased, increased and then reset)
•
Led (n°6)
•
Magnetic Flags (n°5)
•
Relay tripped contact (k51/Y01)
•
mPfault, k51/p1 and k51/p2 contacts (only with Vaux)
In the case of Warning or Emergency, the test is immediately abandoned, still guaranteeing all the protection functions. The test is interrupted
by pressing the “RESET” key.
The functions are guaranteed when there is Vaux or in self-supply with at least single-phase 0.5xIn.
In the absence of both, the energy can be supplied by the PR120/B accessory power supply unit.
On this page - only with Vaux - it is also possible to see the status of the power circuit breaker (“CB STATUS”), thereby checking correct cabling
of the input.
15.2.10.5 Complex test of the trip unit
It is possible to carry out a complete series of tests, with a report which can be downloaded to a PC by using the PR010/T test unit (see par. 15.7.1)
connected to the trip unit by means of the front TEST connector.
The page shown at the side will be displayed by selecting the sub-menu “4. Test” from the main menu screen.
At this point it is possible to check correct operation of:
!
Actuation chain (microprocessor, cabling and SA) with the “Trip Test” function. Select [On] and press the
TEST pushbutton. In the case of a positive result the power circuit breaker is opened. The function is only
available with busbar current nil (use Vaux, PR120/B or PR010/T).