Specifications

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Doc. No
Model
Apparatus
Scale
Page No
1SDH000460R0002
L5439
12.6.3. Replacing an electronic release
To complete the procedure for installing PR121/P take the following steps:
1. With the circuit-breaker open and possibly disconnected, install the protection unit on the circuit-breaker.
2. Power the unit with the PR030/B ONLY.
3. If there are no errors other than the configuration error (see par. 12.7.1), press and hold the “i Test” button for a few seconds
until all the red LEDs start to flash to confirm that installation is complete.
4. Remove the PR030/B.
5. Power the relay from any supply (Vaux, PR030/B, PR010/T).
6. Make sure there are no configuration errors (“Alive” LED on).
7. Circuit-breaker and release can now be put into service.
12.7. Definition of the alarms and signals for the PR121/P unit
12.7.1. Optical signals
The following table shows how the LEDs are managed in accordance with the IEC standard 60073 (and clause 4.2.3.2 in particular).
4.2.3.2).
The LED alerts you to the status of the function set on its zone; e.g. in the figure in par. 12.5 the LED referenced as 1 identifies
the status of the function L. Also see the table below:
Type of information
Flashing
slowly
(0,5Hz)
Flashing fast (2Hz)
LED flashing
with two 0.5 sec
pulses every 2 sec
LED flashing
with one
pulse every 3
sec
LED on permanently
All LEDs All LEDs Single LED All LEDs LED LED All LEDs Single LED
RED RED RED ORANGE RED ORANGE ORANGE RED RED ORANGE
TC error or TC discon-
nected

CS error or disconnected

Rating Plug/Install. error

Protection timing alarm

Last trip
(1)

Test button pressed and no
failure detected
(2)

Hardware Trip
(3)

(4)

L prealarm

(7)
Configuration error
(5)

Settings inconsistency

Normal relay operation
(6)

(1) Information on the “Last trip” is displayed when the LED relating to the protection unit that has been tripped comes on. The
LED remains on for 2 sec, or permanently if an outside power supply (from the PR030/B) is being used).
(2) The information is displayed with all the LEDs on for as long as the test button is pressed and held, or for 2 sec.
(3) When enabled, Hardware trip causes opening of the CB in 1 sec., activates in case of “Cs Error” or “Rating Plug Error”, or
when Ne protection is set to “ON” on the 3p CB without external neutral (configuration error).
When Vaux and/or PR030/B are installed (connected during the event), trip cause is displayed (CS Error, Rating Plug Error).
When no Vaux and/or PR030/B are installed, the general “Hw trip” indication is retained and can be viewed by pressing the
“I-Test” key.
(4) Orange L led and red I led on.
(5) The values entered differ from those stored. Therefore, the relay must be installed (see 12.6.3).
(6) If other signals are not present, unit’s operating mode is indicated 3 sec after the unit has been turned on.
(7) The pre-alarm range is 0.9xI1 and (1.05...1.2)xI1.