Nortech EasyGrid V1 User manual

EasyGrid User Guide
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Nortech EasyGrid
User Guide
MAN-00084 R 10.0

EasyGrid User Guide
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All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form, be it electronically, mechanically, or by any other means such as photocopying,
recording, or otherwise, without the prior written permission of FISO.
Information provided by FISO is believed to be accurate and reliable. However, no responsibility is
assumed by FISO for its use or for any infringements of patents or other rights of third parties that may
result from its use. No license is granted by implication or otherwise under any patent rights of FISO.
FISO’s Commerce and Government Entities (CAGE) code under the North Atlantic Treaty Organization
(NATO) is L0294.
The information contained in this publication is subject to change without notice.
© 2011 FISO Technologies Inc.
Words that FISO considers trademarks have been identified as such. However, neither the presence nor
absence of such identification affects the legal status of any trademark.
Units of measurement in this document conform to SI standards and practices
FISO Technologies Inc.
500, Ave St-Jean-Baptiste, suite 195
Québec (Québec)
G2E 5R9, Canada
Tel : [phone]
Fax : [phone]
[email protected]
www.fiso.com

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1Table of Content
2Product Certification ...................................................................................................................1
2.1 CE Information............................................................................................................................... 1
2.2 Independent Laboratory Testing................................................................................................... 2
3Safety Information......................................................................................................................3
3.1 Safety Conventions........................................................................................................................ 3
3.2 Safety Information......................................................................................................................... 3
3.3 Unpacking and Inspection ............................................................................................................. 5
4First Steps...................................................................................................................................6
4.1 Introducing the Nortech EasyGrid................................................................................................. 6
4.2 Quick Start ..................................................................................................................................... 7
4.2.1 Powering the EASYGRID ........................................................................................................ 7
4.2.2 Connecting Temperature Sensors ......................................................................................... 8
4.2.3 Reading Temperature Measurements .................................................................................. 9
5System Overview ...................................................................................................................... 10
5.1 System Overview......................................................................................................................... 10
5.2 TPT-62 Temperature sensor........................................................................................................ 11
5.2.1 EasyDisk (patent pending)................................................................................................... 12
5.2.2 MiniDisk............................................................................................................................... 12
5.3 EasyThrough ................................................................................................................................ 13
5.3.1 EasyPlate.............................................................................................................................. 14
5.4 EasyRing....................................................................................................................................... 15
5.5 EasyCover .................................................................................................................................... 16
5.6 Fiber Optic Extension .................................................................................................................. 17
5.7 Signal Conditioner Protection Enclosure..................................................................................... 18
6Hardware Configuration............................................................................................................ 19
6.1 Dimensions .................................................................................................................................. 19
6.2 Front Panel Overview .................................................................................................................. 20
6.3 Bottom Panel Overview............................................................................................................... 21
6.4 Maintenance Panel Overview ..................................................................................................... 21
6.5 TFT Display................................................................................................................................... 22
6.6 System and Communication Status LED...................................................................................... 23
6.7 USB Communication Port............................................................................................................ 23
6.8 Power Input................................................................................................................................. 24
6.9 Power Switch............................................................................................................................... 24
6.10 Analog Output ............................................................................................................................. 25
6.11 RS-485/RS-422 Ports ................................................................................................................... 26
6.12 Programmable Relay Terminal Block .......................................................................................... 28
6.13 System Relay................................................................................................................................ 29
6.14 Protective Conductor Terminal ................................................................................................... 29
6.15 Optical Connector........................................................................................................................ 30
7Monitoring ............................................................................................................................... 32
7.1 Temperature & Relay Values....................................................................................................... 33
7.2 Relay Status ................................................................................................................................. 34
7.3 Temperature Statistics ................................................................................................................ 35

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7.4 Diagnostics................................................................................................................................... 36
7.5 General Information.................................................................................................................... 38
7.6 Transformer Information............................................................................................................. 39
8Settings .................................................................................................................................... 40
8.1 Temperature Parameters ............................................................................................................ 41
8.2 Relay Settings .............................................................................................................................. 43
8.2.1 Advanced Config.................................................................................................................. 49
8.3 Statistics Reset............................................................................................................................. 51
8.4 Analog Outputs............................................................................................................................ 52
8.5 Display Settings ........................................................................................................................... 55
8.6 Data Logging................................................................................................................................ 57
8.7 General Settings .......................................................................................................................... 61
8.8 Communication ........................................................................................................................... 64
9Nortech Client Software ............................................................................................................ 67
9.1 Getting Started ............................................................................................................................ 67
9.1.1 Installing the Program ......................................................................................................... 67
9.2 Main Window .............................................................................................................................. 68
9.3 Connecting to the EasyGrid......................................................................................................... 69
9.4 Firmware Update......................................................................................................................... 70
10 Digital Communication Protocol ................................................................................................ 71
10.1 Nortech........................................................................................................................................ 71
10.2 MODBUS...................................................................................................................................... 72
10.2.1 Communication Configuration ............................................................................................ 73
10.2.2 Supported Functions ........................................................................................................... 74
10.2.3 Modbus Data Format Description ....................................................................................... 74
10.2.4 Modbus Register map ......................................................................................................... 75
10.2.5 Modbus Message Description ............................................................................................. 79
10.2.6 Modbus Example................................................................................................................. 82
10.3 Ethernet Protocol Configuration ................................................................................................. 83
10.4 IEC 61850..................................................................................................................................... 86
10.5 IEC 60870-5-104 .......................................................................................................................... 87
10.6 DNP 3.0........................................................................................................................................ 88
11 System Installation.................................................................................................................... 89
11.1 General ........................................................................................................................................ 89
11.2 Handling Optical Cable ................................................................................................................ 90
11.3 Assembly Diagram....................................................................................................................... 92
11.4 Sensor Installation....................................................................................................................... 93
11.4.1 Winding Spacer with Easy Disk............................................................................................ 93
11.5 Sensor Handling until Routing..................................................................................................... 96
11.6 During Dry out Phase................................................................................................................... 96
11.7 Probe Routing.............................................................................................................................. 97
11.8 Tank Wall Assembly Installation.................................................................................................. 98
11.9 External Optical Extension Installation........................................................................................ 99
12 Troubleshooting...................................................................................................................... 100
12.1 Solving Common Problems........................................................................................................ 100
12.2 Resetting to Factory Defaults .................................................................................................... 101
13 Cleaning Procedure ................................................................................................................. 102
13.1.1 General Operation............................................................................................................. 102

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13.1.2 Cleaning the Male ST Connector ....................................................................................... 103
13.1.3 Cleaning the ST Mating...................................................................................................... 104
13.1.4 Typical Results ................................................................................................................... 104
14 Gallium Arsenide Principle ...................................................................................................... 105
14.1 Gallium Arsenide Theory ........................................................................................................... 105
14.1.1 The Principle...................................................................................................................... 105
14.1.2 The Temperature Sensor................................................................................................... 106
15 Warranty ................................................................................................................................ 107
15.1 General Information.................................................................................................................. 107
15.2 Liability ...................................................................................................................................... 107
15.3 Exclusions .................................................................................................................................. 107
15.4 Certification............................................................................................................................... 107
15.5 Service and Repairs ................................................................................................................... 108
15.6 Transportation........................................................................................................................... 109
15.7 FISO Service Center ................................................................................................................... 109

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2Product Certification
2.1 CE Information
Electronic test equipment is subject to the EMC Directive in the European
Union. The EN61326 standard prescribes both emission and immunity
requirements for laboratory, measurement, and control equipment.
This unit has been tested and found to comply with the limits for a Class A
digital device. Please refer to the Declaration of Conformity.

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2.2 Independent Laboratory Testing
This unit has undergone extensive testing according to the European Union Directive and Standards. All
pre-qualification tests were performed internally, at FISO, while final tests were performed externally, at
an independent, accredited laboratory. This guarantees the unerring objectivity and authoritative
compliance of all test results.
Use of shielded remote I/O cables, with properly grounded shields and metal connectors, is
recommended in order to reduce radio frequency interference that may emanate from these cables.
Shielded I/O cables are recommended to improve protection against lightning surge if unit or cables are
installed in an outdoor area. See certificate and tests of compliance.
EasyGrid has been extensively tested to stringent environmental standards to ensure it remains reliable
when used under published specifications.
Conducted Emissions CISPR 11: 2009 Group 1, Class A
Radiated Emissions CISPR 11: 2009 Group 1, Class A
Vibration Response IEC 60255-21-1 (1988) Severity Class 2
Shock Response IEC 60255-21-2 (1988) Severity Class 2
Seismic Test IEC 60255-21-3 (1993-09) Severity Class 2, Method A
Bump Test IEC 60255-21-2 (1988) Severity Class 2
Vibration Endurance IEC 60255-21-1 (1988) Severity Class 2
Shock Withstand IEC 60255-21-2 (1988) Severity Class 2
Burst Immunity IEC 60255-22-1:2005 2.5 kV
RF Immunity IEC 60255-22-3:2007 10 V/m
Conducted Immunity IEC 60255-22-6:2001 10 Vrms
ESD Immunity IEC 61000-4-2:2008 ±15 kV Air / ±8kV Contact
RF Immunity IEC 61000-4-3:2006 10V/m (80 MHz –1 GHz)
RF Immunity IEC 61000-4-3:2006 3V/m (1.4 GHz –2.7 GHz)
EFT Immunity IEC 61000-4-4:2004 ±4 kV
Surge Immunity IEC 61000-4-5:2005 ±2 kV / 1kV
Conducted Immunity IEC 61000-4-6:2008 3 Vrms
Power Frequency Magnetic IEC 61000-4-8:2009 100 A/m Permanent
Field Immunity IEC 61000-4-8:2009 300 A/m Short Duration
Pulse Magnetic Field Immunity IEC 61000-4-9:1993 1000A/m
A1:2000
Voltage Variation Immunity IEC 61000-4-11:2004 N/A
Transport Vibrations MIL-STD-810G Method 514.6,
Figure 514.6C-I, Table 514.6C-II

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3Safety Information
3.1 Safety Conventions
Before using the product described in this manual, you should understand the following conventions:
DANGER
Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Do not proceed unless
you understand and meet the required conditions.
WARNING
Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. Do not proceed unless
you understand and meet the required conditions.
CAUTION
Indicates a potentially hazardous situation which, if not avoided,
may result in component damage. Do not proceed unless you
understand and meet the required conditions.
IMPORTANT
Refers to information about this product you should not
overlook.
3.2 Safety Information
The level of radiation is below the level known to cause eye injury through accidental short-term
exposure. However, avoid prolonged exposure to light emitted from the fiber and do not stare directly at
a light beam, visible or not.
The following safety instructions must be observed whenever the Nortech EasyGrid is operated. Failure
to comply with any of these instructions or with any precaution or warning contained in the Nortech
Fiber Optic Thermometer and Software user’s guide is in direct violation of the standards of design,
manufacture and intended uses of the Nortech EasyGrid. FISO assumes no liability for the customer
failure to comply with these safety requirements. THIS PRODUCT IS NOT DESIGNED FOR USE IN LIFE
SUPPORT OR CRITICAL APPLICATIONS.
In no case will FISO be liable to the buyer, or to any third parties, for any consequential damage or
indirect damage which is caused by product failure, malfunction, or any other problem.
When using any electrical appliance, basic safety precautions should be followed, including the
following:

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FISO recommends using the power supply delivered with your Nortech EasyGrid and verify that the
voltage specifications indicated on the power supply are compatible with the AC voltage and frequency
delivered at the power outlet.
Do not operate in wet/damp conditions.
Do not expose to outdoor conditions. Install the unit in a protective enclosure.
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
WARNING
This equipment must be used as specified or the protection provided by the equipment may be
compromised. You must use this product in a normal mode and should not deviate from the written
instructions provided.
CAUTION
There are no user serviceable parts inside the Nortech EasyGrid, other than the ones specified in the
Maintenance Section. Adjusting parts inside the unit can affect instrument performance. If you adjust
parts, you will need to verify the equipment for good performance. Refer servicing of any other parts to
qualified personnel.

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3.3 Unpacking and Inspection
The Nortech EasyGrid unit is shipped inside a custom box designed for give maximum protection during
shipment. If the shipping box external surface is damaged, notify your shipping department immediately.
Your shipping department may want to notify the carrier.
If the shipping box is not damaged, carefully remove and identify all of the components listed below.
Contact FISO or your local representative if any of the components are missing. We recommend you save
the shipping box for future storage or transportation.
The Nortech EasyGrid package should include the following components:
Nortech EasyGrid
USB interface cable
Nortech Client software installation CD
Optical connector one click cleaner
Calibration Certificate
Nortech EasyGrid Hardware & Software User’s Guide

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4First Steps
4.1 Introducing the Nortech EasyGrid
Nortech EasyGrid fiber optic temperature measurement system is designed for real-time monitoring of
transformer hotspots.
It can be configured to have 4 to 18 channels. Modules can be daisy chained to a maximum of 32, which
gives the possibility to have up to 576 channels in a single system. Each unit has multiple serial
interfaces: USB and RS485/RS422. Supported communication protocols are Nortech and MODBUS (RTU
and ASCII). Optional modules are available for IEC 61850, IEC 60870-5-104 and DNP 3.0.
EASYGRID
Data Logging
Life of the Transformer
Relays
0, 8 or 16 form C with user-configurable set points
5A 250VAC; 5A 30VDC
Relay System
1 form C for fail-safe system fault
3A 250VAC; 3A 30VDC
Power requirement
24VDC ±10%, 40W
Number of Channels
4 to 18
Sensing range
-40°C to 225°C
Resolution
0.1°C
Accuracy
±1°C
Sampling Rate
1 Hz
Display
7” TFT
Serial port
USB and RS-485/422
Standard Communication
Protocol
MODBUS (ASCII, RTU)
Nortech Proprietary Protocol
Optional Communication
Protocol
IEC 61850
IEC 61870-5-104
DNP 3.0
Analog output
4-20 mA (or optional 0-1 mA)
Light source
Life of the transformer
Weight
2.9 Kg
Dimension (HxWxD)
300 mm x 235 mm x 98 mm
Relative humidity
95% RH non-condensing (Tested at 25°C and 55°C)
Warranty
4 years
Note: All specifications are given at room temperature, except where noted. All technical specifications
are subject to change without notice.

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4.2 Quick Start
4.2.1 Powering the EASYGRID
The EasyGrid requires 24 volts DC (±10%) power. The power input terminal block is located on the side
of the unit.
WARNING
Make sure to have a power supply providing the specified power and compatible with your local power
outlet
1. Make sure that power switch is off when connecting the power supply to the unit.
2. Wire the power input terminal block to a power supply providing the required voltage and
respect polarity.
3. Power up the unit using the ON/OFF switch located on the panel above the relay terminal block.
Power Input
ON/OFF Switch

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4.2.2 Connecting Temperature Sensors
The Nortech EasyGrid is compatible with all TPT-62 sensors. No calibration factor or calibration
procedures are required to get accurate temperature measurements.
1. Remove the protective cap from the Male ST Connector and ST Mating
2. Using the One Click tool clean the Male ST connector and the ST Mating
3. Align the male connector key with the mating slot.
4. Insert the connector in the mating
5. Twist to lock

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4.2.3 Reading Temperature Measurements
With the power switch to ON and sensors connected you can read the temperature of each sensor on
the EasyGrid display.

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5System Overview
5.1 System Overview
The Nortech EasyGrid signal conditioner is design to monitor fiber optic temperature sensors installed
inside high voltage power transformers. Immunity to electrical interference and high dielectric constant
procured by fiber optic sensors allow direct contact with high voltage components. It is the only
technology that monitors the true winding temperature in real-time.
To be functional in its target environment, the Nortech EasyGrid is part of a system that includes the
fiber optic sensors and all the components in between. The figure below gives you a general idea of a
typical installation.
In this section we will describe the different component required to have a complete winding
temperature measurement system. Note that all components specified in this document are available at
FISO; contact your sales representative if you need more details.

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5.2 TPT-62 Temperature sensor
The TPT-62 sensor is the commonly used sensor for transformer temperature monitoring. The sensor
possesses a resilient construction and has dielectric resistant materials featuring complete immunity to
EMI and RFI environments. The construction of the cable is specially designed for permanent installation
in oil filled transformer.
Temperature Range
-40°C to 225°C
Resolution
0.1°C
Accuracy
±1 °C
Sensor dimension
1.1mm
Certification
ASTM D-3426
ASTM D-149
IEC 243-1
IEC 243-3
There are 3 tip types available for the TPT-62.

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5.2.1 EasyDisk (patent pending)
The TPT-62 can be factory fitted with an EasyDisk at the sensor tip. This FISO patent pending protection
disk offers many advantages and is strongly recommend for insertion in the windings.
Optimal location of the sensor tip in the spacer
Sensor tip protection
Quick and easy installation in a winding spacer
Increased protection during installation
Spiral wrap inserted in and locked on the disk
Increased protection at the winding exit
5.2.2 MiniDisk
The MiniDisk is another option for the TPT-62. Designed for areas where the EasyDisk is to large but
when the customer needs to quickly lock the sensor in place.
Installation of a sensor in a tight area
Easy Installation
Accurate positioning of the sensor tip

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5.3 EasyThrough
The EasyThrough allows connection of the optical sensor through the transformer tank wall. The
EasyThrough consists of two ST-type mating sleeves, a 3/8” NPT stainless steel fitting with an optical
fiber inside the fitting.
Maximum Operating
Temperature
150 °C
Maximum Pressure
20 bar / 2000 kPA / 390 psi
Fitting Type
3/8” NPT
Thread
ASPT; 60° thread angle, taper
angle of 1°47’, truncation crest
are flat
Material
Stainless Steel

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5.3.1 EasyPlate
The EasyPlate is a stainless steel circular plate that completes the integration of the Nortech direct
winding temperature measurement system.
NPT Type
3/8” NPT pipe thread
NPT holes
1.43 cm (0.56”)
Material
Stainless Steel

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5.4 EasyRing
The EasyRing is a carbon steel circular ring that can be welded to the tank wall to interface perfectly with
the EasyPlate. Its Viton O-ring ensures that no leak is possible between the ring and the plate.
Material
Carbon Steel
O-Ring Material
Viton