Woodward MRI3, Manual, Page: 38 / 68

Woodward Manual MRI3 GB
38 DOK-TD-MRI3 Rev.A
5.6 Adjustment of the clock
When adjusting the date and time, LED
 lights up. The adjustment method is as follows:
Date: Year
Y=00
Month M=00
Day D=00
Time: Hour
h=00
Minute m=00
Second s=00
The clock starts with the set date and time as soon as the supply voltage is switched on. The time
is safe-guarded against short-term voltage failures (min. 6 minutes).
Note:
The window for parameter setting of the clock is located behind the measured value display. The
parameter window can be accessed via the <SELECT/RESET> key.
5.7 Additional functions
5.7.1 Blocking the protection functions and assignment of the output relays
Blocking of the protective functions:
The MRI3-IHE is equipped with a blocking function that can be parameterized arbitrary. Connecting
supply voltage to terminals D8/E8 blocking of those functions which were selected by the user
takes place.
It is possible to choose between two types of protective blocking:
1. Blocking of the individual protection stages. The excitation of the blocked protection
stage is blocked.
2. Blocking of the individual tripping stages. The individual protection stages are excited
and the set tripping time expires. Tripping only takes place when:
a) the voltage at the blocking input D8/E8 is reduced;
b) the voltage at the blocking input D8/E8 is applied, the tripping time and the
blocking time have expired. (refer to Chapter 5.4.8)
Parameter setting is to be carried out as follows:

After the <ENTER> and <TRIP> keys have been actuated simultaneously, the display
shows the text "PR_B" (the protection stages are blocked) or "TR_B" (the tripping stages
are blocked).

The settings can be changed by actuating the keys <+> or <->. In this procedure, the LEDs
I>; I>>; IE>; IE>> are simultaneously alight in case of protective blocking "PR_B" and LEDs
tI>; tI>>; tIE>, tIE>> simultaneously emit light in case of trip blocking "TR_B".

Actuation of the <ENTER> key with a one-time en-try of the password will store the set
function.

After this actuate the <SELECT/RESET> key to call up the first blockable protection
function.

The display will show the text "BLOC" (the respective function is blocked) or "NO_B"
(the respective function is not blocked.

Actuation of the <ENTER> key will store the set function.

By pressing the <SELECT/RESET> pushbutton, all further protective function that can be
blocked are called one after the other.

After selection of the last blocking function renewed pressing of the <SELECT/RESET>
pushbutton switches to the assignment mode of the output relays.