SDMO Nexys 2 Manuale utente

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SDMO

Nexys 2

Instructions for use

Réf. constructeur : V 20/09/2004 Réf. GPAO : 33502017201_1_1

2/22 Ref. GPAO : 33502017201_1_1

1. Introduction to MICS Nexys .........................................................................................................................................................3

2. Description ....................................................................................................................................................................................3

2.1. Standard configuration.....................................................................................................................................................3

2.1.1 Presentation of the front panel.........................................................................................................................................4

2.1.2 Introduction to pictograms...............................................................................................................................................5

2.1.3 Introduction to the rear panel...........................................................................................................................................6

2.2. Safeguards........................................................................................................................................................................6

3. Use ................................................................................................................................................................................................7

3.1. Manual mode ...................................................................................................................................................................8

3.1.1 Starting the generating set ...............................................................................................................................................8

3.1.2 Stopping the generating set..............................................................................................................................................9

3.2. Automatic mode...............................................................................................................................................................9

3.2.1 Starting the generating set ...............................................................................................................................................9

3.2.2 Stopping the generating set............................................................................................................................................10

3.3. Special features of automatic mode ...............................................................................................................................11

3.4. Emergency stop..............................................................................................................................................................11

4. Alarms and faults ........................................................................................................................................................................12

4.1. Display...........................................................................................................................................................................12

4.2. Appearance of a fault or an alarm..................................................................................................................................12

4.3. List of faults which will cause the generating set to stop and generate a pictogram......................................................13

4.4. List of faults which will cause the generating set to stop and generate a fault code......................................................14

4.5. List of alarms associated with a pictogram....................................................................................................................15

5. Special notes................................................................................................................................................................................15

6. Fault finding ................................................................................................................................................................................17

7. Maintenance ................................................................................................................................................................................17

7.1. Replacing the fuse..........................................................................................................................................................17

8. Programming visualisation..........................................................................................................................................................18

9. Viewing the different screens......................................................................................................................................................19

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1. Introduction to MICS Nexys

MICS Nexys is a command / control module designed to control the generating set.

This module, with a 12V direct current supply, is incorporated into the following control consoles:

N 2500

Circuit breaker rating ≤125 A

N 3500

Circuit breaker rating ≤250 A

N 4500

Circuit breaker rating ≤630 A

Fig. 1.1 – View of control consoles

2. Description

2.1. Standard configuration

The MICS Nexys comprises a polycarbonate control panel housing on which the following components are mounted:

oon the front side:

¾an emergency stop button

¾a key switch for starting up or shutting down the entire module (ON/OFF)

¾a protection fuse

¾three push-buttons

¾an LCD screen

oon the rear side

¾an electronic card with 5 connectors, used for the electrical connection of the generating set to the Nexys module

¾a standard configuration electronic "measurements" card for 40 kVA and higher

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2.1.1 Presentation of the front panel

Fig. 2.1 – View of the front side

cEmergency stop button for switching off the generating set in the event of a fault which could endanger personnel or

damage equipment

dKey switch for starting up/shutting down the module and RESET function

eElectronic card protection fuse

fScreen-scroll button, press successively to access the various screens which are available

gSTOP button, press to switch off the generating set

hSTART button, press to switch on the generating set

iNormal operation LEDs and alarm and fault warning LEDs

jSlot reserved for panel fascia options

kMounting bolt.

lLCD for displaying alarms and faults, operating states, electrical and mechanical quantities

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Fig. 2.2 – Description of the LEDs

A lit LED indicates:

cModule being supplied (green, lights up and remains lit)

dEmergency stop activated (control panel or external emergency stop) (red, lights up and remains lit)

eVisualisation of starting phase and speed/voltage stabilisation (flashing) and generating set operating OK or set ready to

generate (green, lights up and remains lit)

fGeneral alarm (orange, flashing)

gGeneral fault (red, flashing).

2.1.2 Introduction to pictograms

The pictograms are as follows:

Operating temperature

Fuel

Overspeed

Non-starting fault

Starting on external command

Preheating

Air intake

Oil pressure

Battery

Delay

Fig. 2.3 – View of pictograms

¾The "fuel level" pictogram is used to display the fault, the alarm and the fuel level.

¾The "operating temperature" and "oil pressure" pictograms are used to display the fault and analog value

¾The "overspeed" and "non-starting fault" pictograms are used to display the fault.

¾The "battery" pictogram is used to display the "alternator charge" fault and to indicate the battery voltage.

1 2 3 4 5

Symbols for electric and

mechanical sizes

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2.1.3 Introduction to the rear panel

Fig. 2.4 – View of the front side

c"Base" electronic card

d"Measurements" electronic card (optional if the power rating of the generating set is less than 30 kVA)

eSlot for options.

2.2. Safeguards

The following options may be added to the standard configuration:

oMeasurements card (if the power rating of the generating set is less than 30 kVA)

oConnected directly to the base card, used for measuring and displaying:

-Electrical quantities (phase-to-neutral voltages "V" and phase-to-phase voltages "U", phase currents

"I")

-Analogue motor quantities (oil pressure, temperature of coolant and level of fuel in daily service tank)

oAuto. pack

9Comprising a preheating switch for the motor cooling circuit, a 12 V – 2.5 A charger connected to the Nexys

module via a wiring harness, a terminal block (2 terminals) and a wiring harness for connecting the external

starting command

oExternal starting command

92-strand wiring harness with customer connection to 2 terminals on the control console

oReport pack (remote information report)

9Provides the following information, on voltage-free switch:

Generating set ready to generate

General fault

Low fuel level fault or alarm (depending on configuration)

oSpeed potentiometer

9Used for adjusting the motor speed by means of a potentiometer located in the panel fascia (this adjustment is

only possible for motors equipped with an electronic regulation system)

oVoltage potentiometer

9Used for adjusting the alternating voltage supplied by the alternator by means of a potentiometer located in the

panel fascia (the potentiometer must be connected to a regulator enabling external adjustment)

7/22 Ref. GPAO : 33502017201_1_1

oHorn

9Connected to the "horn" output (2 fast-on connectors located on the electronic card), can be used to sound an

audible warning in the event of a fault of any type. A "horn off" button may be pressed to inhibit operation of the

horn (only the horn).

oAuxiliary emergency stop button

oPower detection

9Used for starting the generating set in automatic mode following:

A loss of power (one or more phases)

A decrease or increase in mains voltage (time and threshold-adjustable)

A direction of rotation check

oDifferential protection

9This may be provided either:

By a "vigi" unit connected directly to the circuit breaker (current delay and threshold)

Or by a time and threshold-adjustable differential relay.

oProtection against insulation faults

oUsed on "IT" systems, unearthed or impedance-earthed neutral, and set up by adding a "PIM" (Permanent

Insulation Monitor)

oAutomatic filling

oUsed to automatically top up the fuel in the daily storage tank. The fuel pump option comprises a control module

connected to the thermal-magnetic circuit breaker for protecting the engine.

o600 Volts

oThis option is used mainly for the Canadian market (600 Volts). A three-phase transformer is positioned

between the alternator and the Nexys database measurement input. When performing the 600 Volt configuration,

a weighting coefficient is applied to the voltage measurement.

3. Use

The command / control module supports two possible modes:

¾manual mode

¾automatic mode.

8/22 Ref. GPAO : 33502017201_1_1

3.1. Manual mode

3.1.1 Starting the generating set

Danger

Check that the generating set circuit breaker has triggered.

nconnect the generating set battery.

oturn the key switch to the ON position (without forcing it)

9All of the LEDs light up for 2 seconds, to confirm that they are operating correctly.

9If the LEDs do not light up, check the protection fuse and replace it if necessary.

9All the items on the screen are displayed for 2 seconds.

9Only the "ON" LED remains lit to indicate that the module is powered up.

9The following screen appears.

The first line displays the motor speed in RPM.

The second line displays the battery voltage in

volts (V).

9Check the battery voltage (min. 12 V)

pPress (once briefly) the green "START" button.

9If the motor is equipped with an air preheating system, there is a 10-second delay before the motor starts

(preheating activation period).

9The following screen appears

The third line displays the air preheating time

remaining (with pictograms representing a

resistor and an hourglass).

9If the motor is not fitted with an air preheating system or once the preheating delay has elapsed, the engine starts

up (start of a cycle comprising 3 attempts to start up the engine).

9The following screen appears.

Warning

The number of successive and automatic starting attempts is limited to 3.

9/22 Ref. GPAO : 33502017201_1_1

Note: the LED flashes as soon as the START button is pressed and continues to flash until the frequency

stabilises if a "measurements" card has not been inserted and until the frequency and voltage stabilise if a "measurements"

card has been inserted.

Following stabilisation, the LED light comes on continuously.

3.1.2 Stopping the generating set

ntrigger the circuit breaker located at the base of the centre console

oLet the motor run under no load for 1 to 2 minutes to allow it to cool.

ppress the "STOP" button to stop the generating set.

qswitch off the MICS Nexys module by switching the key to "OFF" (without forcing it).

3.2. Automatic mode

3.2.1 Starting the generating set

Danger

When the command / control module is operational (key switch turned to ON), the generating set may

start without warning, upon issue of an external starting command (if the module is equipped with this

option).

When the external command is activated, the "AUT" pictogram appears.

Sequence Screen display

n5-second delay (if this programming has been

performed) to take micro breaks on the line into

account.

The third line on the screen displays the time

remaining for the line micro break.

At the end of this delay, two scenarios are possible:

Generating set with air preheating option

Sequence Screen display LED status

oAir preheating for 10 seconds

pStarting

Flashing:

qGenerating set runs at a stable speed

Continuously lit:

In this case, charging is possible.

10/22 Ref. GPAO : 33502017201_1_1

Generating set without air preheating option

Sequence Screen display LED status

oStarting

Flashing:

pGenerating set runs at a stable speed

Permanently lit:

In this case, charging is possible.

Note:

The MICS Nexys does not control opening and closing commands for the N/E reversing switch.

In this case, and if the N/E switch is a third-party component, it must have its own control mechanism for the N/E switching

components.

3.2.2 Stopping the generating set

When the power is restored (controlled by the SDMO switch), there is a time delay. After this (120 seconds), the external

command disappears, the "emergency" switch is triggered and the "normal" switch is deactivated.

When the external command disappears, the "AUT" pictogram continues to flash followed by the cooling delay.

The LED remains lit.

The following screen appears.

When this is complete (120 seconds), the generating set switches off and the "AUT" pictogram goes out.

(1) The emergency switch is controlled by the reversing switch control.

(2) The motor cooling delay is integrated into the Nexys module.

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