Megger SFC250, SmartFuse 250 User Manual

Consultation with Megger

1

SFC250

SmartFuse 250

USER GUIDE

Issue: 6 (04/2018) - EN
Article number: 85431

Consultation with Megger

2

Consultation with Megger

3

Consultation with Megger

The present system manual has been designed as an operating guide and for
reference. It is meant to answer your questions and solve your problems in as fast and
easy a way as possible. Please start with referring to this manual should any trouble
occur.

In doing so, make use of the table of contents and read the relevant paragraph with
great attention. Furthermore, check all terminals and connections of the instruments
involved.

Should any question remain unanswered or should you need the help of an authorized
service station, please contact:

Megger Limited Seba Dynatronic

Mess- und Ortungstechnik GmbH

Archcliffe Road
Kent CT17 9EN

T: [phone]
F: [phone]
E: [e-mail]

Dr.-Herbert-Iann-Str. 6
D - 96148 Baunach

T: [phone] – 0
F: [phone]
E: [e-mail]

Hagenuk KMT
Kabelmesstechnik GmbH

Megger USA

Röderaue 41
D - 01471 Radeburg / Dresden

T: [phone] – 0
F: [phone]
E: [e-mail]

Valley Forge Corporate Centre
2621 Van Buren Avenue
Norristown, PA 19403 USA

T: [phone]
F: [phone]

 Megger

All rights reserved. No part of this handbook may be copied by photographic or other means unless Megger
have before-hand declared their consent in writing. The content of this handbook is subject to change without
notice. Megger cannot be made liable for technical or printing errors or shortcomings of this handbook.
Megger also disclaims all responsibility for damage resulting directly or indirectly from the delivery, supply, or
use of this matter.

Terms of Warranty

4

Terms of Warranty

Megger accept responsibility for a claim under warranty brought forward by a customer
for a product sold by Megger under the terms stated below.

Megger warrant that at the time of delivery Megger products are free from manufacturing
or material defects which might considerably reduce their value or usability. This
warranty does not apply to faults in the software supplied. During the period of warranty,
Megger agree to repair faulty parts or replace them with new parts or parts as new (with
the same usability and life as new parts) according to their choice.

This warranty does not cover wear parts, lamps, fuses, batteries and accumulators.

Megger reject all further claims under warranty, in particular those from consequential
damage. Each component and product replaced in accordance with this warranty
becomes the property of Megger.

All warranty claims versus Megger are hereby limited to a period of 12 months from the
date of delivery. Each component supplied by Megger within the context of warranty will
also be covered by this warranty for the remaining period of time but for 90 days at
least.

Each measure to remedy a claim under warranty shall exclusively be carried out by
Megger or an authorized service station.

This warranty does not apply to any fault or damage caused by exposing a product to
conditions not in accordance with this specification, by storing, transporting, or using it
improperly, or having it serviced or installed by a workshop not authorized by Megger.
All responsibility is disclaimed for damage due to wear, will of God, or connection to
foreign components.

For damage resulting from a violation of their duty to repair or re-supply items, Megger
can be made liable only in case of severe negligence or intention. Any liability for slight
negligence is disclaimed.

Since some states do not allow the exclusion or limitation of an implied warranty or of
consequential damage, the limitations of liability described above perhaps may not
apply to you.

Contents

5

Contents

Consultation with Megger ............................................................................................... 3

Terms of Warranty ........................................................................................................... 4

Contents ........................................................................................................................... 5

1 General Notes ................................................................................................... 7

2 Technical description ...................................................................................... 9

2.1 Abbreviations ...................................................................................................... 9

2.2 System description ........................................................................................... 10

2.3 Technical data .................................................................................................. 12

2.4 Connections, controls and display ................................................................... 14

2.4.1 Information plate ............................................................................................... 18

3 User interface ................................................................................................. 19

3.1 Access to the user interface ............................................................................. 19

3.1.1 Local operation ................................................................................................. 19

3.1.2 Access through a web browser ........................................................................ 20

3.2 Elements of the main screen ............................................................................ 20

4 Start-up ............................................................................................................ 24

4.1 Preliminary configuration in the office .............................................................. 24

4.2 Installation on site ............................................................................................. 27

4.3 Completing configuration, power up and commissioning ................................. 33

5 Controlling and monitoring in running operation ....................................... 34

5.1 Performing switching operations with the remote control ................................ 34

5.2 Monitoring, analysis and fault location ............................................................. 37

5.2.1 Event and measurement data evaluation ......................................................... 37

5.2.2 Fault location in pulse mode (optional „fault location“ function required) ......... 42

6 Configuration .................................................................................................. 45

6.1 Defining basic settings ..................................................................................... 45

6.2 Pairing and enabling the remote control .......................................................... 47

6.3 Modifying the notification and network settings ............................................... 49

6.3.1 Modifying the notification settings .................................................................... 49

6.3.2 Modifying LAN and WLAN settings .................................................................. 50

6.3.3 Ensuring Internet accessibility .......................................................................... 51

6.3.4 Specifying the outgoing mail server ................................................................. 54

6.4 Configuring trigger events for connected measurement equipment ................ 54

6.5 Updating the firmware ...................................................................................... 55

Contents

6

7 Deinstallation .................................................................................................. 57

8 Maintenance and care .................................................................................... 58

9 Troubleshooting ............................................................................................. 63

General Notes

7

1 General Notes

This manual contains basic instructions for the commissioning and operation of the
device / system. For this reason, it is important to ensure that the manual is always
available to the authorised and trained operator. He needs to read the manual
thoroughly. The manufacturer is not liable for damage to material or humans due to non­observance of the instructions and safety advices provided by this manual.

Locally applying regulations have to be observed!

The following signal words and symbols are used in this manual and on the product
itself:

Signal word /

symbol

Description

DANGER Indicates a potential hazard which will result in death or serious

injury if not avoided.

WARNING Indicates a potential hazard which may result in death or serious

injury if not avoided.

CAUTION

Indicates a potential hazard which may result in moderate or minor
injury if not avoided.

NOTICE

Indicates a potential hazard which may result in material damage if
not avoided.

Serves to highlight warnings and safety instructions.
As a warning label on the product it is used to draw attention to

potential hazards which have to be avoided by reading the manual.

Serves to highlight warnings and safety instructions that explicitly
indicate the risk of an electric shock.

Serves to highlight important information and useful tips on the
operation of the device/system. Failure to observe may lead to
unusable measurement results.

It is important to observe the generally applicable electrical regulations of the country in
which the device will be installed and operated, as well as the current national accident
prevention regulations and internal company directives (work, operating and safety
regulations).

After working on the system, it must be voltage-free and secured against reconnection
as well as having been discharged, earthed and short-circuited.

Use genuine accessories to ensure system safety and reliable operation. The use of
other parts is not permitted and invalidates the warranty.

The system may only be installed and operated by an authorised electrician. DIN VDE
0104 (EN 50191), DIN VDE 0105 (EN 50110) and the German accident prevention
regulations (UVV) define an electrician as someone whose knowledge, experience and
familiarity with the applicable regulations enables him to recognise potential hazards.

Anyone else must be kept away!

Safety precautions

Labelling of safety

instructions

Working with products

from Megger

Operating staff

General Notes

8

The product meets the following security requirements of the European Council
Directives:

• EMC Directive (2004/108/EC)

• Low Voltage Directive (2006/95/EC)

• RoHS Directive (2011/65/EU)

This product includes software components that are covered by the GNU Lesser
General Public License (LGPL). You are hereby granted the right to request the source
code of the following components licensed according to LGPL v.2.1, modify it and
distribute it:

• Libroxml 2.3.0

• GNU C Library 2.19

• Qt 5.4.0

The operating safety is only guaranteed if the delivered system is used as intended (see
page 10). Incorrect use may result in danger to the operator, to the system and the
connected equipment.

The thresholds listed in the technical data may not be exceeded under any
circumstances.

The equipment may only be used when working properly. When irregularities or
malfunctions appear that cannot be solved consulting this manual, the equipment must
immediately be put out of operation and marked as not functional. In this case inform the
person in charge who should inform the Megger service to resolve the problem. The
instrument may only be operated when the malfunction is resolved.

Declaration of

Conformity (CE)

Use of LGPL software

Intended application

Behaviour at

malfunction of normal

operation

Technical description

9

2 Technical description

2.1 Abbreviations

The following abbreviations are used in this manual:

APN Access Point Name

CSV Comma-separated values

DHCP Dynamic Host Configuration Protocol

(network communication protocol)

GPS Global Positioning System

GSM Global System for Mobile Communications

LAN Local Area Network

M2M Machine-to-Machine

LH Niederspannungs-Hochleistungs-Sicherung (low-voltage high-power fuse)

SIM Subscriber Identity Module

SMS Short Message Service

SSID Service Set Identifier

(ID / name of a wireless network)

UMTS Universal Mobile Telecommunications System

URL Uniform Resource Locator

VPN Virtual Private Network

WLAN Wireless Local Area Network

WPA Wi-Fi Protected Access

(encryption method for a wireless network)

Technical description

10

2.2 System description

The use of the SmartFuse 250 allows the low-voltage power supply to be safely
disconnected and automatically restored in the event of faults and overload. The
possibility to configure how often and how fast the power network is reconnected and to
be informed about any events increases the reliability and stability of the power supply
for consumers and minimises downtime.

To this end, the SFC250 is inserted into the fuse holder (sizes NH 2 and NH 3; fuse
value ≤250 A) in place of the normal NH fuse link. After successful installation and
configuration the SFC250 behaves similar to a normal fuse element. Unlike a normal
fuse, after being tripped, the SFC250 can switch the fused circuit back on if desired
(after a short wait).

The consumer does not, as is the case for classic fault location using high voltage, have
to be completely disconnected from the power supply network. This is often not even
possible, for example because the residents are not accessible, leading to a risk of
property damage to the household appliances and building wiring. Instead, the pre­location of detected faults can be carried out under voltage either directly with the
internal location algorithm (optional) or with a reflectometer connected in parallel.

For pinpointing the fault position (with the help of a surge wave receiver or the Fault
Sniffer), the SmartFuse 250 can be switched to pulse mode, in which flash-overs are
continuously provoked at the fault location. Pulse mode can be started and stopped
from remote during pinpointing of the fault using a mobile device (GSM connection) or
the SFC250-RC remote control.

Alternative corrective actions, which require the use of a test van, can be scheduled with
some lead time, because in most cases the SFC250 can maintain the supply of the
fused network section for a certain period.

The SmartFuse 250 combines the following features in one device:

• Intelligent monitoring of the low-voltage network

• Minimised downtimes

• Cable fault location with households connected

• Safe installation in the distribution box

• Intuitive user interface

• Variable control via Touchscreen, Smartphone, Tablet, PC or remote control

• Monitoring of up to three phases with one supply module

Intended use

Features

Technical description

11

The delivery scope includes at least the following components:

Quantity Component Description Item number

1 … 3 Power module

SFC250-PM

Fuse unit incl. Thyristor switch and
measuring technology

1005787

1 Supply module

SFC250-SM

Control and processing unit incl.
communication interfaces

1005924

1 Remote control

SFC250-RC

Incl. antenna and batteries 1006110

1 Connection cable,

black/blue

1.5 m long line with Kelvin terminal
for connecting to the neutral
conductor

90015363

1 Plug-in power

adapter

Universal power supply
(90 … 264 VAC; 12 VDC / 2.08 A) for
configuration of the device in the
office

90025083

1 Transport case 90014263

10 Fuse F1.25 A / 500 V, 6.3x32 mm,

breaking capacity: 50 kA

90013082

1 Manual 85431

Check the contents of the package for completeness and visible damage right after
receipt. In the case of visible damage, the device must under no circumstances be taken
into operation. If something is missing or damaged, please contact your local sales
representative.

The following optional accessories can also be ordered from the sales department if
required:

Accessory Description Item number

Upgrade kit
SFC 250-1-2-VS

To upgrade a single-phase set to a two-

phase

set

1010753

Upgrade kit
SFC 250-1-3-VS

To upgrade a single-phase set to a three­phase set

1010754

"Fault location" option
SFC 250-FL

Automatic fault location with display of the
determined distance and fault pinpointing in
pulse mode

90015840

SFC 250-CA Adapter for connecting up to three power

modules to a supply module

1009649

Additional emergency
backup

Size: SQB1 (with flush end connections);
rated breaking capacity: 200 kA (AC 700 V)

90007524

External GPS receiver
SFC 250-GPS

Incl. cable (approx. 3 m) 2007960

SFC 250-HC Robust and waterproof 7“ tablet for remote

control of the SmartFuse 250

1008357

Fork adapter
SFC 250-GA

Adapter for narrow fuse bases 2009960

Scope of delivery

Check contents

Optional accessories

Technical description

12

2.3 Technical data

The SmartFuse 250 is defined by the following parameters:

Parameter Value

Triggering threshold

10 A … 250 A (adjustable)

Reclose attempts

0 – unlimited

Waiting time until reclose

1 – 120 seconds

Surge energy control1

1 – 50 half-waves

Operating temperature

-20°C to 50°C

Operating humidity

50% at 40 °C
90% at 30°C

Storage temperature

-25°C to 70°C

Memory for mains failure

Non-volatile event memory

Power supply
Power and supply module

100 … 240 V, 50 Hz / 60 Hz (direct tap at
low-voltage distributor)

Power consumption

20 VA + 1 W/A load current

The power module is defined by the following parameters:

Parameter Value

Load current

max. 250 A continuous current

Short-circuit/surge current

max. 9000 A

Internal fuses

F1: 1 x 800 A and
F2: 1 x 1.25 A

Cut-out capacity

200 kA

Compatibility

Fuse holders NH 2 or NH 3

Display elements

LED for indicating the switching status

Weight

3 kg

Dimensions (W x D x H)

130 x 155 x 82 mm

Ingress protection rating (in accordance
with IEC 60529 (DIN VDE 0470-1))

IP 20

1

with "fault location" option

Technical description

13

The supply module is defined by the following parameters:

Parameter Value

Display

Illuminated 3.5-inch colour touch screen
(resistive)

Indicator elements

LED for indicating the switching state (when
the cover is closed)

Memory

microSD card, 16 GB

Interfaces and connections

• GSM / UMTS (SIM card required)

• WLAN (IEEE 802.11x) with WPA2

safety standard

• Ethernet

• Radio interface (868 MHZ)

(communication with remote control)

• USB 2.0

• GPS receiver (integrated)

• Connection for external GPS receiver

(optional)

• Neutral conductor connection

• Trigger output (15 ... 20 V voltage pulse

with fuse tripping)

• Connection coupling for direct

connection of a power module or for
connection of the three-phase adapter

Weight

900 g

Dimensions (W x D x H)

160 x 103 x 97 mm

Ingress protection rating (in accordance
with IEC 60529 (DIN VDE 0470-1))

IP 42

Protection class (in accordance with
IEC 61140 (DIN VDE 0140-1))

II

The remote control is defined by the following parameters:

Parameter Value

Batteries

2 x Mignon (AA)-Batterie Alkali-Mangan

Operating time

>10 hours with fresh batteries

Radio interface

868 MHZ
(communication with remote control)

Weight (incl. batteries and antenna)

200 g

Dimensions (W x D x H)

62 x 31 x 150 mm

Ingress protection rating (in accordance
with IEC 60529 (DIN VDE 0470-1))

IP 40

Technical description

14

2.4 Connections, controls and display

The supply module has the following connection, display and control elements:

Element Description

Touchscreen

Ethernet port

Trigger output (see page 32)

Connection cable for direct connection to a power module or for connection
to the three-phase adapter SFC 250-CA

USB port

SIM card slot

microSD card slot

The microSD card contains the software needed for operation and
may only be removed from the device and the content changed upon
express instruction of an authorised service technician.

Supply module

Inside of cover

Outside of cover

Technical description

15

Element Description

12 V DC input for connecting the supplied power supply

Stylus for operating the touch screen

Connection cable for connecting to the neutral conductor

Socket for connecting the external GPS module (see page 32)

The power module has the following connection and display elements:

Element Description

Blade contacts

Status indicator

The power switch is switched off and there is no mains voltage in
the fuse-protected phase output.

The power switch is on and the protected circuit connected to the
power network.

Ongoing start or update procedure. If the LED is white over a longer
period, this may indicate firmware incompatibility (see page 63).

The supply module does not supply power (see page 63).

Grip lugs for attaching a fuse plug-in grip

Connection cable for direct connection to the supply module or to the three­phase adapter SFC 250-CA

Power module

Technical description

16

The remote control features the following connection, display and control elements:

Element Description

BNC coupling for connecting the antenna

LED for display of the wireless connection (is lit when wireless connection is
established)

LEDs for display of the amount of current

Buttons for switching the power switch on and off, or for triggering a pulse in
pulse mode.

The integrated LED signals the status of the power switch the same way as
the LED on the power module (see previous page).

Buttons for switching the remote control on and off.
The integrated status LED can assume the following states:

Remote control switched on

Low battery power

Remote control switched off

Remote control

Technical description

17

The connection adapter is used to connect up to three power modules to a supply
module and has the following connection and display elements:

Element Description

Connection cable to the supply module

Sockets for connecting up to three power modules

Power LED
The LED lights up as soon as the power module connected to the PM-A

socket has been installed in the control cabinet and provides mains voltage.
From this moment on, the connected supply module is also supplied with
voltage and automatically switched on.

Connection adapter

SFC 250-CA

Technical description

18

2.4.1 Information plate

The information plate is attached to the backside of the supply module and provides the
following information necessary for the operation of SmartFuse 250:

Element Description

The factory preset login information for access via web browser

The factory preset name of the wireless network (WLAN SSID) and the
password for authentication (WLAN PW)

[optional] License key for activation of the "fault location" option

User interface

19

3 User interface

3.1 Access to the user interface

The user interface can be accessed both locally on the supply module and remotely
(using a web browser). The latter requires a data connection between the SFC250 and
the device (PC, smartphone or tablet).

In general, the software can be operated remotely just like as it is operated on the

device itself. However, when the symbol indicates in the status bar (see page 23)
that the cover of the supply module is open, it is not possible to make changes to the
settings.

3.1.1 Local operation

Local operation is performed using the stylus on the touch screen of the supply
module and is in principle always possible as long as the supply module is supplied with
voltage from the power module or the power supply unit.

User interface

20

3.1.2 Access through a web browser

The supply module provides various network interfaces, through which users can
connect to the device and access the user interface.

In general, the user interface can be accessed from any internet-connected device (PC,
smartphone or tablet) that has a JavaScript-capable web browser.

The following table provides an overview of the advantages/limitations of each network
interface and the requirements and steps needed to obtain access:

GSM connection WLAN connection LAN connection

When is the use of this
network interface
recommended?

Complete remote control over the

internet, including notifications

(see page 49)

Wireless access in the

vicinity (for example, for

configuration after

installation)

Preliminary configuration in the

office

Which requirements
need to be fulfilled?

The activated supply module must

be equipped with a suitable SIM

card and accessible via the

internet (see page 51)

The smartphone / tablet

may be up to 15 m from the

activated supply module

The activated supply module

must be connected via the

Ethernet port with a

network socket of the local

network

What steps are
necessary?

Connect to the wireless

network of the supply
module and enter the

password.

The factory preset network

name and password can be

found on the nameplate

(see page 18

) on the bottom

of the supply module.

Locally on the supply module,

ensure that the stored network

settings (see page 50) can be

used to log on in the local

network.

On the terminal device you are using, open a JavaScript-capable web browser.

Enter the IP address / URL of the
supply module in the address line

of the browser or call up the direct

link in the portal of the

commissioned service provider

(see page 53).

Enter the IP address stored

in the WLAN settings as

URL in the address bar of

the browser.

If the browser attempts to
connect to this IP over the
Internet, you must disable

the mobile data connection

of your device

Enter the IP address of the

supply module into the address

bar of the browser.

The IP address used by the

network can be read locally on

the supply module if necessary

(see page 50).

Depending on the connection type and quality, it may take up to two minutes before the
login screen appears.

Log in with the corresponding login information.

The factory preset login information can be found on the information plate (see page 18) on the

backside of the supply module.

3.2 Elements of the main screen

Main screen