Pre-Alarms

General Description

EcoStruxure Power Commission software enables the configuration of the following 3 pre-alarms:

Long-time protection pre-alarm (PAL Ir)
Ground-fault protection pre-alarm (PAL Ig)
Earth-leakage protection pre-alarm (PAL IΔn)

Each alarm has a corresponding alarm code:

PAL Ir = 1013
PAL Ig = 1014
PAL IΔn = 1015

Each alarm has a priority level that manages the alarm display on the FDM121 display:

No priority = N/A (not affected)
Low priority = 1. No alarm display on the FDM121 display.
Medium priority = 2. The FDM121 display LED is steady ON.
High priority = 3. The FDM121 display LED blinks and a pop-up screen informs the user that the alarm is active.

For more information regarding the relationship between alarm priority and FDM121 display, refer to the following guides in Related Documents at the beginning of this guide:

DOCA0188•• ComPacT NSX MicroLogic 5/6/7 Trip Units - User Guide
48940-312-01 - MicroLogic 5 and 6 Electronic Trip Units for PowerPacT H-, J-, and L-Frame Circuit Breakers - User Guide

The pre-alarms registers describe the settings of the pre-alarms:

Address	Register	Description
0x19F9–0x1A02	6650–6659	Long-time protection pre-alarm (PAL Ir)
0x1A03–0x1A0C	6660–6669	Ground-fault protection pre-alarm (PAL Ig)
0x1A0D–0x1A16	6670–6679	Earth-leakage protection pre-alarm (PAL IΔn)

Long-Time Protection Pre-Alarm (PAL Ir)

A read request of 10 registers is necessary to read the long-time protection pre-alarm parameters.

Address	Register	RW	X	Unit	Type	Range	Description
0x19F9	6650	R	–	–	INT16U	–	The MSB gives the activity of the alarm: 0 = On, 1 = Off. The factory setting is 0 (On). The LSB gives the priority of the alarm: N/A, 1, 2, or 3. The factory setting is 2 (medium priority).
0x19FA	6651	–	–	–	–	–	Reserved
0x19FB	6652	R	1	%	INT16	⁽¹⁾	% of Ir pick-up value. The factory setting is 90.
0x19FC	6653	–	–	–	–	–	Reserved
0x19FD	6654	R	1	s	INT16U	1	Pick-up time delay (fixed to 1 s)
0x19FE	6655	R	1	%	INT16	⁽¹⁾	% of Ir drop-out value. The factory setting is 85.
0x19FF	6656	–	–	–	–	–	Reserved
0x1A00	6657	R	1	s	INT16U	1	Drop-out time delay (fixed to 1 s)
0x1A01–0x1A02	6658– 6659	–	–	–	–	–	Reserved
(1) For distribution application, the range is 40–100. For motor application, the range is 10–95.

Ground-Fault Protection Pre-Alarm (PAL Ig)

A read request of 10 registers is necessary to read the ground-fault protection pre-alarm parameters.

Address	Register	RW	X	Unit	Type	Range	Description
0x1A03	6660	R	–	–	INT16U	–	The MSB gives the activity of the alarm: 0 = On, 1 = Off. The factory setting is 0 (On). The LSB gives the priority of the alarm: N/A, 1, 2, or 3. The factory setting is 2 (medium priority).
0x1A04	6661	–	–	–	–	–	Reserved
0x1A05	6662	R	1	%	INT16	40–100	% of Ig pick-up value. The factory setting is 90.
0x1A06	6663	–	–	–	–	–	Reserved
0x1A07	6664	R	1	s	INT16U	1	Pick-up time delay (fixed to 1 s)
0x1A08	6665	R	1	%	INT16	40–100	% of Ig drop-out value. The factory setting is 85.
0x1A09	6666	–	–	–	–	–	Reserved
0x1A0A	6667	R	1	s	INT16U	1	Drop-out time delay (fixed to 1 s)
0x1A0B–0x1A0C	6668–6669	–	–	–	–	–	Reserved

Earth-Leakage Protection Pre-Alarm (PAL IΔn)

A read request of 10 registers is necessary to read the earth-leakage protection pre-alarm parameters.

Address	Register	RW	X	Unit	Type	Range	Description
0x1A0D	6670	R	–	–	INT16U	–	The MSB gives the activity of the alarm: 0 = On, 1 = Off. The factory setting is 0 (On). The LSB gives the priority of the alarm: N/A, 1, 2, or 3. The factory setting is 2 (medium priority).
0x1A0E	6671	–	–	–	–	–	Reserved
0x1A0F	6672	R	1	%	INT16	50–80	% of IΔn pick-up value. The factory setting is 90.
0x1A10	6673	–	–	–	–	–	Reserved
0x1A11	6674	R	1	s	INT16U	1	Pick-up time delay (fixed to 1 s)
0x1A12	6675	R	1	%	INT16	50–80	% of IΔn drop-out value. The factory setting is 85.
0x1A13	6676	–	–	–	–	–	Reserved
0x1A14	6677	R	1	s	INT16U	1	Drop-out time delay (fixed to 1 s)
0x1A15– 0x1A16	6678– 6679	–	–	–	–	–	Reserved