MR MESSKO MFLOC 2.0 User manual

Flow Indicator
MESSKO® MFLOC 2.0
Operating Instructions
BA6500372-01 EN

© All rights reserved by Messko GmbH
Dissemination and reproduction of this document and use and disclosure of its
content are strictly prohibited unless expressly permitted.
Infringements will result in liability for compensation. All rights reserved in the event
of the granting of patents, utility models or designs.
The product may have been altered since this document was published.
We reserve the right to change the technical data, design and scope of supply.
Generally the information provided and agreements made when processing the
individual quotations and orders are binding.
The original operating instructions were written in German.

Table of contents
3BA6500372-01 EN
1 Introduction...........................................................................5
1.1 Manufacturer.................................................................................... 5
1.2 Safekeeping..................................................................................... 5
1.3 Notation conventions ....................................................................... 5
1.3.1 Hazard communication system .................................................................... 5
1.3.2 Information system....................................................................................... 7
1.3.3 Instruction system ........................................................................................ 7
1.3.4 Typographic conventions ............................................................................. 8
2 Safety.....................................................................................9
2.1 Intended use .................................................................................... 9
2.2 Fundamental Safety Instructions ................................................... 10
2.3 Personnel qualification................................................................... 11
2.4 Personal protective equipment ...................................................... 13
3 Product description............................................................15
3.1 Scope of delivery ........................................................................... 15
3.2 Function description....................................................................... 15
3.3 Design/versions ............................................................................. 15
4 Packaging, transport and storage ....................................17
4.1 Purpose ......................................................................................... 17
4.2 Suitability, structure and production............................................... 17
4.3 Markings ........................................................................................ 17
4.4 Transportation, receipt and handling of shipments........................ 17
4.5 Further transport ............................................................................ 19
4.6 Storage of shipments..................................................................... 19
5 Mounting .............................................................................20
5.1 Attaching the flange to a pipe ........................................................ 20
5.2 Fastening the flow indicator to a pipe ............................................ 22

Table of contents
4 BA6500372-01 EN
5.3 Electrically connecting the micro-switches .................................... 24
5.3.1 Cable recommendation .............................................................................. 24
5.3.2 Connection via terminal box....................................................................... 25
5.3.3 Connection via ANSI plug / MIL plug ......................................................... 27
5.4 Tests .............................................................................................. 28
6 Removal...............................................................................29
7 Maintenance and care ........................................................32
8 Disposal...............................................................................33
9 Technical data.....................................................................34
10 Drawings .............................................................................38
10.1 10120555....................................................................................... 39
10.2 10120525....................................................................................... 40
10.3 10120554....................................................................................... 41

1 Introduction
5BA6500372-01 EN
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
This technical document is intended solely for specially trained and autho-
rized personnel.
1.1 Manufacturer
The product is manufactured by:
Messko GmbH
Gewerbegebiet An den Drei Hasen
Messko-Platz 1
61440 Oberursel
Germany
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Internet: www.reinhausen.com/messko
Further information on the product and copies of this technical document are
available from this address if required.
1.2 Safekeeping
Keep this technical file and all supporting documents ready at hand and ac-
cessible for future use at all times.
1.3 Notation conventions
This section contains an overview of the symbols and textual emphasis
used.
1.3.1 Hazard communication system
Warnings in this technical file are displayed as follows.

1 Introduction
6 BA6500372-01 EN
1.3.1.1 Warning relating to section
Warnings relating to sections refer to entire chapters or sections, sub-sec-
tions or several paragraphs within this technical document. Warnings relat-
ing to sections have the following format:
WARNING
Type of danger!
Source of the danger and its consequences.
► Action
► Action
1.3.1.2 Embedded warning information
Embedded warnings refer to a particular part within a section. These warn-
ings apply to smaller units of information than the warnings relating to sec-
tions. Embedded warnings use the following format:
DANGER! Instruction for avoiding a dangerous situation.
1.3.1.3 Signal words and pictograms
The following signal words are used:
Signal word Definition
DANGER Indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING Indicates a hazardous situation which, if not avoided, could result
in death or serious injury.
CAUTION Indicates a hazardous situation which, if not avoided, could result
in minor or moderate injury.
NOTICE Indicates measures to be taken to prevent damage to property.
Table1: Signal words in warning notices

1 Introduction
7BA6500372-01 EN
Pictograms warn of dangers:
Pictogram Definition
Warning of a danger point
Warning of dangerous electrical voltage
Warning of combustible substances
Warning of a tipping hazard
Warning of a hot surface
Table2: Pictograms used in warning notices
1.3.2 Information system
Information is designed to simplify and improve understanding of particular
procedures. In this technical file it is laid out as follows:
Important information.
1.3.3 Instruction system
This technical file contains single-step and multi-step instructions.

1 Introduction
8 BA6500372-01 EN
Single-step instructions
Instructions which consist of only a single process step are structured as fol-
lows:
Aim of action
üRequirements (optional).
► Step 1 of 1.
ðResult of step (optional).
ðResult of action (optional).
Multi-step instructions
Instructions which consist of several process steps are structured as follows:
Aim of action
üRequirements (optional).
1. Step 1.
ðResult of step (optional).
2. Step 2.
ðResult of step (optional).
ðResult of action (optional).
1.3.4 Typographic conventions
The following typographic conventions are used in this technical file:
Typographic convention Purpose Example
UPPERCASE Operating controls,
switches
ON/OFF
[Brackets] PC keyboard [Ctrl] + [Alt]
Bold Software operating con-
trols
Press Continue button
…>…>… Menu paths Parameter > Control pa-
rameter
Italics System messages, error
messages, signals
Function monitoring alarm
triggered
[► Number of pages]. Cross reference [► 41].
Table3: Typographic conventions

2 Safety
9BA6500372-01 EN
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
▪ Read this technical file through carefully to familiarize yourself with the
product.
▪ This technical file is a part of the product.
▪ Read and observe the safety instructions provided in this chapter in partic-
ular.
▪ Observe the warnings in this technical file in order to avoid function-re-
lated dangers.
▪ The product is manufactured on the basis of state-of-the-art technology.
Nevertheless, risks to life and limb for the user or impairment of the prod-
uct and other material assets may arise in the event of improper use.
2.1 Intended use
The flow indicator monitors the flow of the cooling medium (water, mineral in-
sulating oil, alternative insulating fluids) in the cooling circuit of a trans-
former.
The device is designed solely for use in electrical energy large-scale fixed in-
stallations and facilities. If used as intended and in compliance with the re-
quirements and conditions specified in this technical document as well as
the warning notices contained in this technical document and attached to the
product, the product does not pose risk of personal injury or damage to prop-
erty or the environment. This applies throughout the entire service life of the
product, from delivery, installation and operation to removal and disposal.
Intended use refers to the following:
▪ Use the product only with the transformer specified in the order.
▪ Operate the product in accordance with this technical document, the
agreed-upon delivery conditions and the technical data.
▪ Ensure that any necessary work is only performed by qualified personnel.
▪ Use the provided equipment and special tools solely for the intended pur-
pose and in accordance with the specifications of this technical document.

2 Safety
10 BA6500372-01 EN
2.2 Fundamental Safety Instructions
To prevent accidents, disruptions and damage as well as unacceptable ad-
verse effects on the environment, those responsible for transport, installa-
tion, operation, maintenance and disposal of the product or parts of the prod-
uct must ensure the following:
Personal protective equipment
Loosely worn or unsuitable clothing increases the danger of becoming
trapped or caught up in rotating parts and the danger of getting caught on
protruding parts. This results in danger to life and limb.
▪ All necessary devices and personal protective equipment required for the
specific task, such as a hard hat, safety footwear, etc. must be worn. Ob-
serve the "Personal protective equipment" [►Section 2.4, Page 13] sec-
tion.
▪ Never wear damaged personal protective equipment.
▪ Never wear rings, necklaces or other jewelry.
▪ If you have long hair, wear a hairnet.
Work area
Untidy and poorly lit work areas can lead to accidents.
▪ Keep the work area clean and tidy.
▪ Make sure that the work area is well lit.
▪ Observe the applicable laws for accident prevention in the relevant coun-
try.
Explosion protection
Highly flammable or explosive gases, vapors and dusts can cause serious
explosions and fire.
▪ Do not install or operate the product in areas where a risk of explosion is
present.

2 Safety
11BA6500372-01 EN
Safety markings
Warning signs and safety information plates are safety markings on the
product. They are an important aspect of the safety concept. Safety mark-
ings are depicted and described in the chapter "Product description".
▪ Observe all safety markings on the product.
▪ Make sure all safety markings on the product remain intact and legible.
▪ Replace safety markings that are damaged or missing.
Ambient conditions
To ensure reliable and safe operation, the product must only be operated
under the ambient conditions specified in the technical data.
▪ Observe the specified operating conditions and requirements for the in-
stallation location.
Modifications and conversions
Unauthorized or inappropriate changes to the product may lead to personal
injury, material damage and operational faults.
▪ Only modify the product after consultation with Messko GmbH.
Spare parts
Spare parts not approved by Messko GmbH may cause physical injury and
damage the product.
▪ Only use spare parts approved by the manufacturer.
▪ Contact Messko GmbH.
Working during operation
You must only operate the product when it is in a sound operational condi-
tion. Otherwise it poses a danger to life and limb.
▪ Regularly check the operational reliability of safety equipment.
▪ Perform the inspection tasks described in this technical document regu-
larly.
2.3 Personnel qualification
The person responsible for assembly, commissioning, operation and inspec-
tion must ensure that personnel are sufficiently qualified.

2 Safety
12 BA6500372-01 EN
Electrically skilled person
The electrically skilled person has a technical qualification and therefore has
the required knowledge and experience, and is also conversant with the ap-
plicable standards and regulations. The electrically skilled person is also pro-
ficient in the following:
▪ Can identify potential dangers independently and is able to avoid them.
▪ Is able to perform work on electrical systems.
▪ Is specially trained for the working environment in which (s)he works.
▪ Must satisfy the requirements of the applicable statutory regulations for
accident prevention.
Electrically trained persons
An electrically trained person receives instruction and guidance from an
electrically skilled person in relation to the tasks undertaken and the poten-
tial dangers in the event of inappropriate handling as well as the protective
devices and safety measures. The electrically trained person works exclu-
sively under the guidance and supervision of an electrically skilled person.
Operator
The operator uses and operates the product in line with this technical docu-
ment. The operating company provides the operator with instruction and
training on the specific tasks and the associated potential dangers arising
from improper handling.
Technical Service
We strongly recommend having repairs and retrofitting carried out by our
Technical Service department. This ensures that all work is performed cor-
rectly. If repair work is not carried out by our Technical Service department,
please ensure that the personnel who carry out the repairs are trained and
authorized to do so by Maschinenfabrik Reinhausen GmbH.
Maschinenfabrik Reinhausen GmbH
Technical Service
P.O. Box 12 03 60
93025 Regensburg
Germany
Phone: [phone]
Fax: [phone]

2 Safety
13BA6500372-01 EN
E-mail: [email protected]
Internet: www.reinhausen.com
2.4 Personal protective equipment
Personal protective equipment must be worn during work to minimize risks to
health.
▪ Always wear the personal protective equipment required for the job at
hand.
▪ Never wear damaged personal protective equipment.
▪ Observe information about personal protective equipment provided in the
work area.
Personal protective equipment to be worn at all times
Protective clothing
Close-fitting work clothing with a low tearing
strength, with tight sleeves and with no protrud-
ing parts. It mainly serves to protect the wearer
against being caught by moving machine parts.
Safety shoes
To protect against falling heavy objects and slip-
ping on slippery surfaces.
Special personal protective equipment for particular environments
Safety glasses
To protect the eyes from flying parts and splash-
ing liquids.
Visor
To protect the face from flying parts and splash-
ing liquids or other dangerous substances.

2 Safety
14 BA6500372-01 EN
Hard hat
To protect from falling and flying parts and mate-
rials.
Hearing protection
To protect from hearing damage.
Protective gloves
To protect from mechanical, thermal, and electri-
cal hazards.

3 Product description
15BA6500372-01 EN
This chapter contains an overview of the design and function of the product.
3.1 Scope of delivery
The product is packaged with protection against moisture and is delivered as
follows:
▪ Flow indicator
▪ Fastening materials
▪ Gasket
▪ Technical documents
3.2 Function description
Flow indicators monitor the operation of pumps in the cooling circuit of a
power transformer. Various versions of the flow indicator enable the use of
water, mineral insulating oil or an alternative insulating fluid as an insulating
medium.
The pump status (PUMPON or PUMPOFF) is mechanically displayed by a
pointer on the flow indicator.
The pump status is electrically signaled by 2 permanently installed micro-
switches (changeover contacts).
3.3 Design/versions
The flow indicator consists of a display part and a transmitter part (flange
with paddle). Depending on the cooling medium used, the display part is la-
beled with WATER or OIL (mineral insulating oil, alternative insulating fluids).

3 Product description
16 BA6500372-01 EN
The micro-switches installed in the flow indicator are designed as
changeover contacts, which you can electrically connect using either a termi-
nal box or an ANSI plug / MIL plug.
Figure1: MESSKO®MFLOC 2.0
1 Nameplate 2 Pressure equalization element
3 Marking for mounting position 4 Paddle
5 Grounding screw 6 Display part
7 Type of cooling medium used 8 Transmitter part
9 MIL plug 10 Terminal box with M20x1.5 or ¾“
NPT cable screw connection
11 ANSI plug

4 Packaging, transport and storage
17BA6500372-01 EN
4.1 Purpose
The packaging is designed to protect the packaged product during transport,
loading, unloading and during periods of storage in such a way that no detri-
mental changes occur. The packaging must protect the goods against per-
mitted transport stresses such as vibration, knocks and moisture (rain, snow,
condensation).
The packaging also prevents the packaged goods from moving impermissi-
bly within the packaging.
4.2 Suitability, structure and production
The goods are packaged in a sturdy cardboard box or solid wooden crate.
These ensure that the shipment is secure when in the intended transporta-
tion position and that none of its parts touch the loading surface of the
means of transport or touch the ground after unloading.
Inlays inside the box or crate stabilize the goods, preventing impermissible
changes of position and protecting them from vibration.
4.3 Markings
The packaging bears a signature with instructions for safe transport and cor-
rect storage. The following symbols apply to the shipment of non-hazardous
goods. Adherence to these symbols is mandatory.
Protect against
moisture
Top Fragile Attach lifting
gear here
Center of mass
Table4: Shipping pictograms
4.4 Transportation, receipt and handling of shipments
In addition to vibrations, jolts must also be expected during transportation. In
order to prevent possible damage, avoid dropping, tipping, knocking over
and colliding with the product.
Should the packaging tip over or fall, damage is to be expected regardless of
the weight.

4 Packaging, transport and storage
18 BA6500372-01 EN
Every delivered shipment must be checked for the following by the recipient
before acceptance (acknowledgment of receipt):
▪ Completeness based on the delivery slip
▪ External damage of any kind.
The checks must take place after unloading, when the box or transport con-
tainer can be accessed from all sides.
Visible damage
If externally visible transport damage is detected upon receipt of the ship-
ment, proceed as follows:
▪ Immediately record the transport damage found in the shipping docu-
ments and have this countersigned by the deliverer.
▪ In the event of severe damage, total loss or high damage costs, immedi-
ately notify the sales department at Messko GmbH and the relevant insur-
ance company.
▪ After identifying damage, do not modify the condition of the shipment fur-
ther and retain the packaging material until an inspection decision has
been made by the transport company or the insurance company.
▪ Record the details of the damage on-site immediately with the transport
company involved. This is essential for any claim for damages!
▪ If possible, photograph damage to packaging and packaged goods. This
also applies to signs of corrosion on the packaged goods due to moisture
(rain, snow, condensation) infiltrating the packaging.
▪ Make sure you also check the sealed packaging.
Hidden damage
In the event of damage that is not detected until unpacking after receipt of
the shipment (hidden damage), proceed as follows:
▪ Make the party potentially responsible for the damage liable as soon as
possible by telephone and in writing, and prepare a damage report.
▪ Observe the time periods applicable to such actions in the respective
country. Inquire about these in good time.
With hidden damage, it is very hard to make the transportation company (or
other responsible party) liable. Any insurance claims for such damage can
be successful only if relevant provisions are expressly included in the insur-
ance terms and conditions.

4 Packaging, transport and storage
19BA6500372-01 EN
4.5 Further transport
Use the original product packaging for further transport.
If you transport the product to the final installation site in a mounted state,
observe the following information in order to protect the product against me-
chanical damage due to external influences.
Transport packaging requirements
▪ Select packaging suitable for the duration of transport or storage, taking
the climatic conditions into consideration.
▪ Ensure that the packaging protects the product against transport stress
such as shaking, vibrations and impacts.
▪ Ensure that the packaging protects the product against moisture such as
rain, snow and condensation.
▪ Ensure that the packaging allows for sufficient air circulation in order to
prevent the formation of condensation.
4.6 Storage of shipments
When selecting and setting up the storage location, ensure the following:
▪ Store the product and accessories in the original packaging until installa-
tion.
▪ Protect stored goods against moisture (rain, flooding, water from melting
snow and ice), dirt, pests such as rats, mice, termites etc. and against
unauthorized access.
▪ Store crates and boxes on pallets, timber beams or planks as protection
against ground moisture and for improved ventilation.
▪ Ensure that the foundation has sufficient load-bearing capacity.
▪ Keep entrance paths clear.
▪ Check the stored goods at regular intervals. Also take appropriate action
after storms, heavy rain or snow etc.

5 Mounting
20 BA6500372-01 EN
DANGER
Electric shock!
Danger of death due to electrical voltage when assembling the
device.
► Switch off transformer on high and low-voltage side.
► Lock transformer to prevent unintentional restart.
► Make sure that everything is de-energized.
► Visibly connect all transformer terminals to ground (grounding leads,
grounding disconnectors) and short circuit them.
► Cover or cordon off adjacent energized parts.
NOTICE
Damage to the device and transformer!
An unfavorable installation position or excessive flow speed poses the risk
of property damage.
► Ensure that the maximum flow speed is 2.5m/s and that no turbulence
occurs at the installation location.
► Install the flow indicator only on the pressure side of the pump.
► Maintain a distance of at least 600 mm from the pump outlet.
► In the direction of flow, maintain a distance of at least 300 mm from
changes in cross-section, bends and other devices in the piping (addi-
tional pump, stop valve, non-return valve, etc.).
This chapter describes how to install the flow indicator on a pipe and electri-
cally connect the micro-switches.
5.1 Attaching the flange to a pipe
The flange must be even and clean to enable a flange joint with the least
possible stress. Even slight unevenness on a flange can cause the flange to
be curved too much, leading to cracks in the flange caused by the resulting
transverse stress. Impurities on the seal surfaces will lead to damage to the
surfaces or to the sealing materials, thus leading to leaks in the seals.