Unit Operativa Trasformatori - Monselice ABB Issued by: Matteo Scattolin

Written by: Angelo Cammisuli, Marco Piovan Rev. 3 Document Num:

1LIT000000M0027 Date: 29/07/2011

IMPACT RECORDER

Istructions for use to the Customer

Index

1. General information.......................................................................................... 3

2. Removal instructions ........................................................................................ 5

3. Data management ............................................................................................. 7

3.1 Data storage ................................................................................................. 8

3.2 Data analyisis ............................................................................................. 10

3.3 Requested actions ....................................................................................... 10

Template for removal date registration ....................................................................................... 12

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1. General information

The Impact Recorder is provided in order to record events that may occur during

transportation.

The device is started and then firmly fixed inside of a metal box by ABB personnel. The

box is subsequently closed and installed on the transformer body before dispatch by

ABB personnel.

ABB Monselice is equipped with two types of Impact Recorder which operations and

performance are identical. The models are presented in the following pictures: model

RD 317 (Picture 1) and model RD 248 (Picture 2).

Picture 1: impact recorder RD 317 Picture 2: impact recorder RD 248

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Picture 3: impact recorder box fixed on transformer Picture 4: example of general displacement

Picture 3 and 4 show how the impact recorder box looks like with its cover, and where it

is typically installed on the transformer. The box can be installed in any wall of the tank,

or alternatively on its cover. Once the transformer is delivered on site and it is placed on

its final position, the impact recorder box must be removed from the transformer body

and sent back to ABB Monselice for data analysis.

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2. Removal instructions

Referring to picture 5, remove the bolts highlighted in red by means of a proper

spanner.

Picture 5: bolts to be removed

Then, the battery of the impact recorder has to be removed. In order to remove the

battery, proceed as follows:

Remove the cover of the impact recorder box by loosing the fixing bolts

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Loose the 4 bolts which fix the impact recorder to the plate at the bottom of the box

Open the cover of the battery: this is located differently, depending on the impact recorder model. On the side for RD 317 with one bid screw which is also the cover

(Picture 6) and on the bottom for RD 248 with four small screws at the corners of

the battery cover (Picture 7)

Picture 6: bolts to be removed Picture 7: bolts to be removed

Remove the battery and place it into the impact recorder box Close the battery cover with its screw/screws Fix the impact recorder again to the plate inside of the box Close the cover of the impact recorder box with its screws

After all this, the Template for removal date registration (or a paper according to it)

has to be completely filled in (transformer item number, transformer positioning date on

final site, removal date of impact recorder, location, operators name and signature).

Impact recorder box, together with the form just mentioned here above, has to be

packed (see picture 8 and 9) and shipped to the following address (which is also shown

on the cover):

ABB S.p.A. Power Products Division

Unit Operativa Trasformatori

Via Campestrin 6A

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35043 Monselice (PD) Italy

Picture 8 example of the package Picture 9: removal date on the package

3. Data management

Purpose of impact recorders is to monitor the transformer shipping from ABB

plant to final destination in order to verify that the impacts are within 4g (each axis),

normal acceptable value for transformer safety.

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3.1 Data storage

There are three different kind of data registration:

1. Summaries: one time every 8 hours, the instrument records the acceleration value in

three directions, ambient temperature and time. Considering memory capacity, 170

days and 16 hours of registration are permitted.

Picture 10: Example of Summaries

2. Time Slots: one time every 300 seconds, the instrument records the acceleration

value in three directions, ambient temperature and time. In this case, the data are

shown in a chart (see picture 11). Considering memory capacity, 91 days of

registration are permitted.

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Picture 11: Example of Slots

3. Events: the impact recorder is normally in stand by and when it detects acceleration

over 1g, it becomes ready to operate: as soon as the acceleration value is over 3g it

records it (in three directions) with time and temperature value. Events record has no

time limit: impact recorder continues working until it has enough battery, also after

that it has already finished to record all the summaries.

Picture 12: Example of Events

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3.2 Data analyisis

Considering the explanation here above, slot and summaries are not so

important to verify transformer condition during transportation.

On the contrary, the events are essentials in order to analyze possible strong impacts

happened during transformer transportation.

In order to complete the data analysis and to prepare the report, the following

dates have to be clearly identified:

- Impact recorder installation (by ABB)

- Transformer departure (by ABB)

- Delivery of transformer (by customer)

- Impact recorder removal (by customer)

In this way it is possible to divide the events in two different groups:

- Events related directly to the transformer and its transport operation from Italy

to final site.

- Events related only to the impact recorder box and its operations of installation

on the transformer, transportation from final site to Italy and removal from the

transformer.

3.3 Requested actions

Starting from ABB experience and after deep investigation, the safety limit for

transformer was so fixed: 4g.

For that reason, after the analysis of impact recorder data, there could be two different

situations:

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During transportation, there were only events with acceleration values (in any directions) lower than safety limit (4g) or not related to the transformer:

in this case, the transformer could be energized.

During transportation, there were events with acceleration values over 4g (even only in one direction): in this case, before the transformer energization,

further investigations are needed.

The following tests have to be carried out:

- Insulation resistance measurement (IEC 60076)

- Winding resistance measurement (IEC 60076)

Then, these results will be analyzed and compared with the data of Monselice

test room report.

After that, we will be able to decide if the transformer could be energized or if

other actions are needed in order to verify its condition (further tests, active part

inspection, etc..).

Rev.0 Unit Operativa Trasformatori - Monselice 10-08-2006ABB Impact Recorder

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Template for removal date registration

Transformer serial number: 1LIT __ __ __ __ __ __ - __ __

Transformer has been placed on final site on (date and time dd/mm/yyyy, hh:mm):

__ __ / __ __ / __ __ __ __ GMT+1 (Italian Time Zone)

__ __ : __ __ LOCAL Time Zone

Impact recorder box has been removed on (date and time dd/mm/yyyy, hh:mm):

__ __ / __ __ / __ __ __ __ GMT+1 (Italian Time Zone)

__ __ : __ __ LOCAL Time Zone

Location:

Operators name ....

Operators signature: