CRE Technology SCR2.0 Manuel utilisateur

www.cretechnology.com

SCR

Synchroscope and synch check relay

User manual - Technical documenta

www.cretechnology.com

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

Content

1PRESENTATION........................................................................................................................................................................5

2INSTALLATION..........................................................................................................................................................................6

2.1 Environmental Requirements..........................................................................................................................................6

2.2 Unpacking.......................................................................................................................................................................6

2.3 Preparation.....................................................................................................................................................................6

2.4 Mounting the Unit...........................................................................................................................................................6

2.5 Wiring the Unit................................................................................................................................................................6

3HUMAN-MACHINE INTERFACE.................................................................................................................................................9

3.1 LED display......................................................................................................................................................................9

3.2 Digital display................................................................................................................................................................10

4PROGRAMMING....................................................................................................................................................................11

5OPERATION ...........................................................................................................................................................................12

5.1 Power-up ......................................................................................................................................................................12

5.2 Status information ........................................................................................................................................................12

5.3 Synchronization checking ..............................................................................................................................................12

6OTHER FEATURES ..................................................................................................................................................................14

6.1 Dead Bus Enable............................................................................................................................................................14

6.2 Synchronization checking delay .....................................................................................................................................14

7MISCELLANEOUS ...................................................................................................................................................................15

7.1 Troubleshooting............................................................................................................................................................15

7.2 Declaration of conformity..............................................................................................................................................15

7.3 Technical specifications.................................................................................................................................................15

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

DOCUMENT CONTROL

Version

Date

Changed by

Details

July 22nd, 2014

A. Mesnard

First edition

Aug. 25th, 2014

A. Mesnard

Minor, chronogram completed

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

1PRESENTATION

The unit SCR2.0 is a metering and control module used in manual synchronization and protection panels. It

monitors the voltage and frequency of two power networks and shows the measured values on its 3-digit 7-

segment display. The 24-led circular synchroscope indicates the true instantaneous phase angle between the

networks.

It is powered by a battery.

It can check the synchronization between a generator and its busbar, or a generator busbar and mains.

The measured/calculated parameters are:

Generator phase-to-neutral voltage

Generator frequency

Busbar phase-to-neutral voltage

Busbar frequency

Busbar-generator frequency diﬀerence

Busbar-generator voltage diﬀerence

Busbar-generator phase difference

The unit is installer-friendly and user-friendly. In addition, programmable parameters give an extended

control over the operation. The programmed values are stored in a non volatile memory; thus all information

is retained even in the event of complete loss of power.

Designation: SCR 2.0 / A60 X2

WARNING

THIS UNIT DOES NOT CHECK THE PHASE SEQUENCE

First make sure the two AC supplies feature the same sequence of the phases

Failure to follow this instruction can damage the equipment

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

2INSTALLATION

The unit is designed for panel mounting, which provides user with access only to the front panel.

2.1 Environmental Requirements

Operating temperature: -20°C (-4°F) to 70°C (158°F)

Storage temperature: -30°C (-22°F) to 80°C (176°F)

Maximum humidity: 95% without condensation

2.2 Unpacking

Make sure the packaging contains:

the unit

two clamping sets packaged apart

a delivery bill

Unpack and keep the packaging in event of return.

Make sure the unit does not show scratches or visible defaults. Otherwise describe them on the bill.

2.3 Preparation

1. Cut out the panel to 92x92 mm minimum (3.6 in. x 3.6 in.)

2. Make sure the cut-out is smooth and clean

2.4 Mounting the Unit

Tool: cross-head screwdriver size 1.

To mount the unit:

3. Pass the unit through the panel

4. In the rear, insert the tab of a clamping set into the hole on one side of the unit, and screw the unit

against the panel

5. Repeat on the other side

6. Tighten equally on both sides

2.5 Wiring the Unit

Tool: insulated screwdriver Ø2.5 mm (0.1 in.), tightening torque: 0.8 Nm (7 lb-in) max.

Wires: 0.2…2.5 mm² (AWG 25 …14)

Accessories: 7-terminal cable connector, protective gloves, carpet if the floor is wet

WARNING

THE UNIT IS NOT PROTECTED

Use external fuses for Busbar phase: L1, Generator phase: L1, Battery positive: BAT(+).

Install the fuses as nearly as possible the unit, in a place easily accessible to the user. Fuse rating: 6A.

The disconnection device must NOT be ﬁtted in a ﬂexible cord.

Failure to follow this instruction may damage the unit

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

LOWER CONNECTOR: digital inputs and outputs, unit power supply

To check the connection, press the Lamp test button. (The led SYNCH OUT is not tested.)

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH

The unit must only be installed and serviced by qualified electrical personnel

Apply appropriate personal protective equipment (PPE) and follow safe electrical

work practices

Turn off power before installing or removing fuses, and before installing the unit

Use a properly rated voltage sensing device to confirm the power is off

Do not use renewable link fuses in fused switch

Failure to follow this instruction will result in death or serious injury

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

UPPER CONNECTOR: phase L1 and neutral on both sides of the breaker

1. Make sure the cable connector is NOT plugged on the upper connector

2. Take on protective gloves

3. Connect the wires on the cable connector in accordance with the National Wiring Regulations

Term

Function

Technical data

Description

GENERATOR PHASE-L1

Generator phase input,

0-300VAC

Connect the generator phase there. The generator

phase voltage upper and lower limits are

programmable

unused

GENERATOR NEUTRAL

Input, 0-300VAC

Neutral terminal of the generator phase

unused

BUSBAR NEUTRAL

Input, 0-300VAC

Neutral terminal of the busbar phase

unused

BUSBAR PHASE-L1

Busbar phase input,

0-300VAC

Connect the busbar phase there. The busbar voltage

upper and lower limits are programmable

4. Plug the cable connector onto the upper connector

5. Lock the rear door.

DANGER

EXPOSED TERMINALS

Do not touch or use non-insulated tools near terminals L1 and N. These terminals are

unprotected and will expose the user to dangerous voltages

Failure to follow this instruction will result in death, serious injury or equipment

damage

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

3HUMAN-MACHINE INTERFACE

The information is displayed as follows:

3.1 LED display

The Synchronoscope shows the instantaneous phase difference between the generator voltage and the

busbar voltage.

When both networks are synched, the uppermost led at 12:00, marked 0º, is ON

When the generator frequency is higher than the busbar frequency, the synchroscope turns clockwise

When the generator frequency is lower than the busbar frequency, the synchroscope turns counter-

clockwise.

The Status shows the current status of the busbar and generator voltages and the synchronization checking

status.

The SYNCH OUT illuminates when the SYNCH CHECK relay output is ON.

SCR 2.0 indicates the nature of the displayed value by lighting one unit led in three (VAC, Hz or degree).

LED

Colour

Description

Synchroscope

Red or

amber

When both busbar and generator voltages are in range, the synchroscope illuminates.

Only one of the leds turns on at a time. The led indicates the phase difference between

the generator phase and the busbar phase.

Right-hand side illuminated: the generator phase is leading (in advance) the busbar

Left-hand side illuminated: the generator phase is lagging

Light cycling clockwise: generator frequency > busbar frequency

Light cycling counter-clockwise: generator frequency < busbar frequency

BUS status

Amber

ON when the busbar voltage is in range

GEN status

Amber

OFF if the generator voltage is out of range

Blinks if the generator voltage is in range, but SCR2.0 is waiting for a checking request

Steadily ON if the synchronization coupling is enabled

Output state

Amber

ON when the SYNCH CHECK relay is energized.

The synchronization checking can be initiated or terminated:

locally by pressing the SYNCH button

remotely via the SYNCHRONIZATION (CHECK) ENABLE input signal

The led SYNCH OUT is not energized by the Lamp test

Unit

Red

SCR2.0 selects VAC, Hz or Deg. depending on the position in the MENU

A60 X2 9 0020 B EN user manual technical documentation www.cretechnology.com

3.2 Digital display

The unit has a three-digit seven-segment display. It shows on request:

Readings (symbol, then value) in a sequence

Programmable parameters (number, then value) in a sequence

Scan the various readings using the MENU button. The sequence is:

U1: busbar phase-to-neutral voltage

U2 : generator phase-to-neutral voltage

dU: voltage diﬀerence between busbar and generator phases

F1: busbar frequency

F2: generator frequency

dF: frequency difference between busbar and generator

deg: phase difference between busbar and generator phases (degrees)

Hold down the button to display the value.

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