ABB Arc Guard System TVOC-2 Manuel du produit

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Current Sensing Unit

Installation and maintenance guide

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1SFC170015M0201 EN, REV B*

Current Sensing Unit

Installation and maintenance guide

* Appendix for Arc Guard System™ – TVOC-2 Installation and maintenance guide EN

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

This chapter describes warning and information signs used

in this manual, which the user should pay attention to.

• The installation shall be performed by authorized

personnel only.

• The manual shall always be read through before

performing any tasks.

Usage of warnings and notes

There are two types of safety instructions throughout this

manual: warnings and notes. Warnings caution you about

conditions which can result in serious injury or death and/

or damage to the equipment, and advise on how to avoid

the danger. Notes draw attention to a particular

condition or fact, or give information on a subject.

The warning symbols are used as follows:

CAUTION

Caution icon indicates the presence of a hazard

which could result in personal injury.

WARNING

Warning icon indicates the presence of a hazard

which could result in damage to equipment or

property.

Electrostatic sensitive devices warning

Tells that electrostatic discharge is needed to

not damage the equipment.

INFORMATION

Information sign alerts the reader to pertinent

facts and conditions.

Electrostatic sensitive devices warning

The printed circuit boards contain components

sensitive to electrostatic discharge. Wear a

grounding wrist band when handling the boards.

Do not touch the boards unnecessarily. Use

grounding strip:

Personal safety

Service and repair should be performed

by authorized personnel only. Note that

unauthorized repair affects safety and warranty.

ABB personell have to, as a minimum, follow the

ABB CISE 15.4 instructions.

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Safety

Warning and information

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE 5

6 1.1 Introduction

6 1.2 Mounting of the component

7 1.3 Electrical installation of CSU

8 1.4 Connection of optical fibre cables

and detectors

8 1.5 Settings for operation

9 1.6 Control

10 1.7 Diagrams and layouts

—

Current Sensing Unit

Installation and

maintenance guide

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

6ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE

1.1 Introduction

This is a appendix to Arc Guard System™, TVOC-2

Installation and maintenance guide, which shows

operation connections between the TVOC-2 and the

Current Sensing Unit (CSU).

This appendix shows connection of Fibre cables and

Detectors, how to control, diagrams and layouts.

CAUTION

Risk of Electric Shock. Do not remove any current

range bridge connection when current circuits

are live!

WARNING

Safe working methods must be used to prevent

injuries. The safety equipment must not be

disengaged, bypassed or in any other way

modified so that the safety effect ceases.

INFORMATION

For further information about installation and

maintenance for the Arc Guard System,

see manual;

Arc Guard System™, TVOC-2 Installation and

maintenance guide 1SFC1700011M0201

1.2 Mounting of the component

This chapter describes how to mount the TVOC-2 and

the CSU. For mounting details of the TVOC-2 and the CSU,

see: Chapter 4, Mounting on page 24 in

Arc Guard System™, TVOC-2 Installation and

maintenance guide 1SFC1700011M0201.

1. Mount the Units

The TVOC-2 and the CSU should be mounted

according to figure 1.

The flange opening shall be facing downwards,

inside a cubicle, separately on a wall or stand.

1Loosen 2x screws on the CSU box.

2Open the hatch of the CSU box.

2. Earth the component

1Earth the component according to figure 2.

1.2-1

1.2-2

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE 7

1.3 Electrical Installation of CSU

This chapter describes the electrical installation of the

CSU. For Wiring diagrams and layouts, see chapter

1.7 Diagrams and layouts.

CAUTION

Risk of Electric Shock. Do not remove any current

range bridge connection when current circuits

are live!

WARNING

Safe working methods must be used to prevent

injuries. The safety equipment must not be

disengaged, bypassed or in any other way

modified so that the safety effect ceases.

3. Connect supply voltage

1Connect the supply voltage to terminal 10...14.

Select the terminals according to desired voltage,

See 1.7.2 Simplified block diagram.

4. Connect the external current transformers

1Connect the current-circuits from the external

current transformers to terminal 1...6.

Single-, two- or three-phase connection is possible,

but single-phase connection results in a somewhat

longer function time.

5. Connect one side of current-circuit to earth

1One side of each current-circuit should be

connected to earth. 2By EMC-reasons this is best

done by earthing of the terminals 2, 4 and 6 inside

the enclosure.

6. Connect the Current transformers internal

1The internal connection in the CSU is selected

according to which secondary rating the chosen

transformers have. See table below.

Table 5

Secondary rating of

transformers

Connection Id

1A X24-X17, X25-X20, X26-X23

2A X24-X16, X25-X19, X26-X22

5A X24-X15, X25-X18, X26-X21

1.3-3

1.3-4

1.3-5

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

8ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE

1.4 Connection of Optical Fibre Cables

and Detectors

General

Before the detectors can be connected to the component

the protective covers on the input terminals must be

removed. Please note that unused optical inputs must

have their protective plugs inserted, to avoid incorrect

tripping signals coming from them.

When connecting the detectors to the component the

end sleeve of the optical fibre is pressed to the bottom

of the connection terminal. Please check that it can not be

removed easily by gently pulling the optical fibre cable.

7. Connect the detectors to the Arc Monitor

1Remove the protection plug. 2Connect the

detector cable to the detector inputs at the lower

right side of the Arc Monitor.

8. Connect the TVOC-2 to the CSU

1Connect a optical fibre cable to 21 or 22 in

the Arc Monitor. 2Connector the other end of

the fibre cable to 7 or 8 in the Current Sensing Unit.

Connect outsignal from the CSU

If more than one Current Sensing Unit is used, the

optical fibre cables are connected from output 7 or

8 to input 9 of the next Current Sensing Unit so that

the Current Sensing Units are connected in series.

1.5 Settings for Operation

9. Test or Operational position

The CSU can be switched to Test position or

Operational position by turning the S1 Switch.

Switch S1 1in figure 9

Position 1: Test

Position 2: Operation

Switch input 9 on or off

Input 9 of the CSU can be switched to on or off

position by turning the S1 Switch.

Switch S2 2in figure 9

Position 1: When input terminal 9 is not used.

Position 2: When input terminal 9 is used.

10. Set the nominal level with Potentiometer R21

The nominal overcurrent level is set with the

Potentiometer R21

The overcurrent level should be set as low as

possible. Adjustment must be done at max load

current. The potentiometer is turned clockwise until

both the yellow LED V27 1and the green LED V29

2are lit. It should then be turned back slightly until

the yellow LED is switched off. With this setting the

current sensing unit will indicate an overcurrent at

a level of approx. 140% of the max set current level.

1.4-7

1 2

1.4-8

2 1

1.5-9

1.5-10

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE 9

1.6 Control

Preform this test after installation, before using the unit.

Switch on the supply voltage.

Switch S1 to position 1, (the test position).

A red lit LED, V22, indicates that S1 is in test position.

11. Control the Overcurrent

An overcurrent is simulated by turning the

potentiometer R29 clockwise until both the yellow,

V27, and the green, V29, LEDs are switched off.

A fault is simulated, and it should be checked that

the circuit breaker trips.

12. Control the Normal current

A normal current is simulated by turning the

potentiometer R29 counter clockwise so that both

the yellow LED and the green LED are lit.

A fault is simulated again, in the same way as

above, and it should be checked that the circuit-

breaker does NOT trip.

Resetting to NORMAL RUN condition is done by setting

switch S1 in the Current Sensing Unit to position 2.

(The red LED V22 is switched off.)

1.6.1 Test when in use

WARNING

Since the breaking capacity of the

disconnectable terminal blocks are very low,

they must not be opened when there is current

flowing in the circuit.

To enable a test to be done when the Arc Monitor is in use,

the trip circuit can be disconnected by opening the inputs

21 1and 22 2.

DO NOT FORGET TO RECONNECT THE TERMINALS 21 2

AND 23 3AFTER THE TEST.

A control of the function is recommended after every arc

fault and should also be carried out regularly, e.g. once

a year. This applies to all units.

INFORMATION

If the dip switches on the TVOC-2 are configured

to have a CSU installed and the CSU cable is

disconnected, a fault indication will appear.

Fault indication will disappear when

reconnecting the CSU cable to the TVOC-2.

1.6-11

1.6-12

1.6.1-13

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

10 ABB CURRENT SENSING UNIT INSTALLATION AND MAINTENANCE GUIDE

1.7 Diagrams and layouts

1.7.1 Current Sensing Unit

Table 5

Current Sensing Unit 1

From another Current

Sensing Unit

V22 Red LED, switched on

when S1 is in test mode

S1 Test switch

Position 1: Test

Position 2: Operation

R29 Potentiometer for

simulating a test current

V29 Green LED switched

on for normal current

and switched off for

overcurrent

R21 Potentiometer for

overcurrent setting

V27 Yellow LED, switched

off at approx. 70% of

over-current level

S2 Operation condition

switch

Position 1: Input 9 is not used

Position 2: Input 9 is used

X15 Terminal pins for

X26 Choice of current range

Table 5

Current range Bridge connections

1A X24-X17, X25-X20, X26-X23

2A X24-X16, X25-X19, X26-X22

5A X24-X15, X25-X18, X26-X21

To a Current Sensing Unit, Arc

Monitor, or Breaker Fault Unit

Layout diagram

-60V

-24V

12 10 11 13 14

V29

V27

V22

≅110-125V

-220V, ∼230V

N L

*) 48 V DC with a wire

between 11 and 13

R29V22

S2 21

15 24

10 11 12 13 14

1-2

R21

V27V29

To a Current Sensing Unit, Arc

Monitor, or Breaker Fault Unit

Layout diagram

-60V

-24V

12 10 11 13 14

V29

V27

V22

≅110-125V

-220V, ∼230V

N L

*) 48 V DC with a wire

between 11 and 13

R29V22

S2 21

15 24

10 11 12 13 14

1-2

R21

V27V29

Draft, ne pas diffuser Tue Dec 18 2018 15:16:42 GMT+0100 (Romance Standard Time)

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