DOCA0091EN-08

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.

Refer to the ComPact NSX MicroLogic 5/6/7 Trip Units - User Guide Related Documents for more information regarding the relationship between alarm priority and FDM121 display.

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

A/E

Description

0x19F9

6650

R

INT16U

A/E

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)

A/E

% of Ir pick-up value. The factory setting is 90.

0x19FC

6653

Reserved

0x19FD

6654

R

1

s

INT16U

1

A/E

Pick-up time delay (fixed to 1 s)

0x19FE

6655

R

1

%

INT16

(1)

A/E

% of Ir drop-out value. The factory setting is 85.

0x19FF

6656

Reserved

0x1A00

6657

R

1

s

INT16U

1

A/E

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

A/E

Description

0x1A03

6660

R

INT16U

A/E

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

A/E

% of Ig pick-up value. The factory setting is 90.

0x1A06

6663

Reserved

0x1A07

6664

R

1

s

INT16U

1

A/E

Pick-up time delay (fixed to 1 s)

0x1A08

6665

R

1

%

INT16

40–100

A/E

% of Ig drop-out value. The factory setting is 85.

0x1A09

6666

Reserved

0x1A0A

6667

R

1

s

INT16U

1

A/E

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

A/E

Description

0x1A0D

6670

R

INT16U

E

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

E

% of IΔn pick-up value. The factory setting is 90.

0x1A10

6673

Reserved

0x1A11

6674

R

1

s

INT16U

1

E

Pick-up time delay (fixed to 1 s)

0x1A12

6675

R

1

%

INT16

50–80

E

% of IΔn drop-out value. The factory setting is 85.

0x1A13

6676

Reserved

0x1A14

6677

R

1

s

INT16U

1

E

Drop-out time delay (fixed to 1 s)

0x1A15– 0x1A16

6678– 6679

Reserved