ABB Comem eOLI22 Manual de usuario

ALLRELEVANTFIREREGULATIONMUSTBE

STRICTLY OBSERVED.

WARNING

—

TRANSFORMER COMPONENTS

Electronic Liquid level indicator eOLI/eOLI22 and Comem

eViewer

Quick start

1. Safety

1.1 Safety instruction

Make sure that any personnelinstalling:

• are technically qualified and competent

• fully comply with these assembling

instructions

Improper operations or misuse could cause

danger to:

• life and limb

• to the equipment and other assets of the

operator

• to the proper function of the equipment

Safety instructions inthis manual are shown in

three different forms to emphasizeimportant

information

1.2 Specified applications

The liquid level indicator is used in oil-insulated

transformer to indicate the conservator tank oil

level. Inside the device are usually installed up to

four micro-switches to signal somecritical oil

levels. The micro-switches can givealarm or

transformer power off signals

It is important to observethe limit values

indicated on the nameplate and in the operating

instruction before commissioning the device

1.3 Safety notes on the equipment

operation

Electricalinstallation is subject to the relevant

national safety rules.

It is mandatory to connect the grounding cable

THISINFORMATIONINDICATESPARTICULAR

DANGERTOEQUIPMENTAND/OROTHER

PROPERTYOFTHEUSER.SERIOUSORFATAL

INJURYCANNOTBEEXCLUDED.

CAUTION

THIS INFORMATION INDICATES PARTICULAR DANGER TO

LIFE AND HEALTH. DISREGARDING

SUCH A WARNING

CAN LEAD TO SERIOUS OR

FATAL INJURY.

WARNING

THIS NOTE GIVES IMPORTANT AND SPECIFIC

INFORMATION CONCERNING THE EQUIPMENT.

NOTE

INSTALLATION, ELECTRICAL CONNECTION AND

FITTING

THEDEVICEMAYONLYBEPERFORMED

BY QUALIFIED

PERSONNEL AND ONLY IN ACCORDANCE WITH THIS

INSTRUCTION

MANUAL. IT IS THE RESPONSIBILITY OF

THE

USERTOENSURETHATTHEDEVICEISUSED FOR

SPECIFIEDAPPLICATIONONLY.

FORSAFETYREASONS,PLEASEAVOIDANY

UNAUTHORIZEDANDIMPROPERUSAGE.

ALL RELEVANT FIRE PROTECTION REGULATIONS

MUST BE STRICTLY FOLLOWED

CAUTION

2. Technical features

EXPECTED USE : EXTERNAL

MAXIMUM ALTITUDE : 2000 M

MAXIMUM HUMIDITY : 80%

POLLUTION LEVEL : GRADE III

NOTE

FOR COMEM eOLI/eOLI22

The electrical micro switches operate at an advance angle

≤

°5

with respect to the min or max indications of the oil level in the

conservator. When there is a double contact, for e.g. double

MIN and/or double

MAX (schemesY o W) the second contact operates at

about 5° after the first contact.

NOTE

TRANSFORMER COMPONENTS

—

3. Installation

3.1 Comem eOLI

Insert thearm with float through the machined

hole on theconservatorPlace the o-ring on the

slot behind the gauge

(Fig.1/B) . Align the flange (Fig.1/C - stud length:

20±1 mm) with the threaded pins or holes

(Fig.1/A) (depending on the conservator flange

type). The gauge has to be assembled onthe

flange using four screws M4x12 (Fig.1/D). The oil

level indicator flange has to be assembled using

the items showed in the table 1.

Table 1

Fig 1

3.1 Comem eOLI22

Insert thearm with float through the machined

hole on the conservator. Place the o-ring in the

slot behindthe flange (Fig.1/C). Insert the flange

on the threaded pins (Fig.1/A) of the conservator

flange and fix it with the items showedin the

table 2 (Fig.1/B). Fixthe gaugeon the flange

using 4 screws M4x12 (Fig.1/D).

3.3 Comem eViewer

Arrange the transformer with a dedicated place

followingthe schemein the figure 3. The

connectioncan be donein two alternativeway:

• threaded pin andnut M6

• screws M6

Fig.3

3.4 Modbus parameter

In order to implement a communication network

with eOLI/eOLI22 communicating in Modbus

RTU, the following communication parameters:

shall be considered:

Speedof data transmission (baud rate

): 9600

bits/s

Data bits (number of bits

): 8

Parity bit

: None

Stop bit

: 1

Fig.2

Table 2

SELF-DEHYDRATING BREATHER COMEM ESDB - INSTRUCTION MANUAL

—

4. Electrical connection

4.1 Micro switch wiring

Wire the electrical cablesin accordance with theordered

model following the electricalscheme

showed in the Fig.4.

4.2 Analog output and Modbus

communication wiring (Comem eOLI and

eOLI-22)

4.2.1 Power voltage

Connect the power voltage (as written on the

label on the terminal box cover – Fig.5)to

terminals 1-2 24 Vdc ±10% polarized

4.2.2 Analog output

Terminals for analog output 4-20 mA: 6-7

Maximum resistance: 450 Ω

4 mA = 0% (minimum arrow position)

20 mA = 100% (maximumarrow position)

4.2.3 Modbus communication

Digital output RS485: terminals 3-4

(for the Modbus registerand address, check the

complete manual instruction Manual instruction)

4.3 Comem eViewer wiring

4.3.1 Power voltage

Connect the power voltage (as written inside the

terminal box, Fig.5) to terminals 1-2.

24 Vdc ±10%

4.3.2 Analog input

Connect the analog signal (as written inside the

terminal box, Fig. 5) to terminals 6-7 4-20 mA:

- Negative Comem eViewer (3) with negative

Comem eOLI (7).

- Positive Comem eViewer (4) with positive

Comem eOLI (6)

4.3.3 Comem eViewer – Comem eOLI/eOLI22

connections

The following scheme (Fig.6) describesthe

connections for signalremoting between an

electronic liquid level indicator and the eViewer.

Fig.4

Fig.5

Fig.6

TRANSFORMER COMPONENTS

—

5. Troubleshooting

Issue What to do

eOLI/eOLI22 do not provide any 4-

20mA/Modbus output

Check that the eDevice is properly fed with

24 VDC between terminals 1 (

) and 2 (

) –

Blue LEDs (one fixed and one blinking)

shall be powered on

Not possibleto read Modbus output

on eOLI/eOLI22 If the eDevice is properly powered on (see

below row),check the Modbus ID and

Pointer onthe dial is always at the

lowest position Check that the floating element is not

damaged

eViewer does not indicate any value

even if it is connected to the

eOLI/eOLI22

Check the polarity connection of the 4-

20mA terminals

For further information check the complete manual instruction (Manual instruction) or contact ABB at

IT-support.comem@abb.com

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