Siemens Sicam P855 7KG85 Series, Sicam P850 7KG85 Series Device Manual

Preface
Open Source Software
Contents

Power Monitoring Device
and
Power Quality Recorder

SICAM P850/P855
7KG85xx

V2.60

Device Manual

User Information 1
Overview 2
Device Design 3
Measurands and Recording 4
Getting Started 5
Connection Principle 6
Operation at Use of a PC 7
Operation at Use of the Display 8
Time Synchronization 9
Calibration 10
Maintenance, Storage, Transport 11

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Failures and LED Indications 12
Technical Data 13
Operational Indications 14
Operating Parameters 15

Glossary
Index

Disclaimer of Liability

Copyright

This document has been subjected to rigorous technical review
before being published. It is revised at regular intervals, and any
modifications and amendments are included in the subsequent
issues. The content of this document has been compiled for
information purposes only. Although Siemens AG has made best
efforts to keep the document as precise and up-to-date as possible,
Siemens AG shall not assume any liability for defects and damage
which result through use of the information contained herein.

This content does not form part of a contract or of business
relations; nor does it change these. All obligations of Siemens AG
are stated in the relevant contractual agreements.

Siemens AG reserves the right to revise this document from time to
time.

Document version: E50417-H1040-C482-A6.02
Edition 10.2018
Version of the product described: V2.60

Copyright Siemens AG 2018. All rights reserved.

The disclosure, duplication, distribution and editing of this
document, or utilization and communication of the content are not
permitted, unless authorized in writing. All rights, including rights
created by patent grant or registration of a utility model or a design,
are reserved.

Registered Trademarks

SIPROTEC

TM

and SICAMTM are registered trademarks of

SIEMENS AG. An unauthorized use is illegal.

All other designations in this document can be trademarks whose
use by third parties for their own purposes can infringe the rights of
the owner.

Preface

Purpose of this Manual

This manual describes the application, functions, installation, commissioning, and operation of the
Power Monitoring Device and Power Quality Recorder SICAM P850/P855 7KG85xx.

Target Group

This manual is intended for project engineers, commissioning and operating personnel in electrical systems
and power plants.

Scope of Vali dity of this Manual

This manual is valid for the Power Monitoring Device and Power Quality Recorder SICAM P850/P855
7KG85xx.

Further Support

For any questions concerning your system, please contact your Siemens representative.

The Siemens Customer Support Center provides around-the-clock support.

Phone: [phone]

Fax: [phone]

Internet: www.siemens.com/powerquality

e-mail: [e-mail]

Training Courses

If you are interested in our current training program, please contact our training center:

Siemens AG
Siemens Power Academy TD

Humboldtstr. 59
D-90459 Nuremberg

Tel.: [phone]

Fax: [phone]

Internet: http://www.siemens.com/poweracademy

e-mail: [e-mail]

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3SICAM P850/P855, 7KG85xx, Device Manual

Notes On Safety

This manual is not a complete index of all safety measures required for operation of the equipment (module,
device). However, it comprises important information that must be noted for purposes of personal safety, as
well as in order to avoid material damage. Information is highlighted and illustrated as follows according to the

degree of danger.

DANGER

DANGER means that death or severe injury will occur if the appropriate safety measures are not taken.

✧ Follow all advice instructions to prevent death or severe injury.

WARNING

WARNING means that death or severe injury can occur if the appropriate safety measures are not taken.

✧ Follow all advice instructions to prevent death or severe injury.

CAUTION

CAUTION means that minor or moderate injury can occur if the appropriate safety measures are not taken.

✧ Follow all advice instructions to prevent minor injury.

NOTICE

NOTICE means that damage to property can occur if the appropriate safety measures are not taken.

✧ Follow all advice instructions to prevent damage to property.

NOTE

is important information about the product, the handling of the product, or the part of the documentation in
question to which special attention must be paid.

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E50417-H1040-C482-A6, Edition 10.2018

Personnel Qualified in Electrical Engineering

Only qualified electrical engineering personnel may commission and operate the equipment (module, device)
described in this document. Qualified electrical engineering personnel in the sense of this manual are people
who can demonstrate technical qualifications as electrical technicians. These persons may commission, iso­late, ground, and label devices, systems and circuits according to the standards of safety engineering.

Use as Prescribed

The equipment (device, module) must not be used for any other purposes than those described in the Catalog
and the Technical Description. If it is used together with third-party devices and components, these must be
recommended or approved by Siemens.

If the device is not used in accordance with the Product Information and this manual, the scheduled protection
is impaired.

Problem-free and safe operation of the product depends on the following:

• Proper transport

• Proper storage, setup, and installation

• Proper operation and maintenance

When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper ac­tion is not taken, death, severe injury, or property damage can result.

• The equipment must be grounded at the grounding terminal before any connections are made.

• All circuit components connected to the power supply may be subject to dangerous voltage.

• Hazardous voltages may be present in equipment even after the supply voltage has been disconnected
(capacitors can still be charged).

• Equipment with exposed current transformer circuits must not be operated. Prior to disconnecting the
equipment, ensure that the current transformer circuits are short-circuited.

• The limit values stated in the document may not be exceeded. This must also be considered during testing
and commissioning.

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Used Symbols

No. Symbol Description

1 Direct current

IEC 60417-5031

2 Alternating current

IEC 60417-5032

3 Direct and alternating current

IEC 60417-5033

4 Three-phase alternating current

5 Earth (ground) terminal

IEC 60417-5017

6 Protective conductor terminal

IEC 60417-5019

7 Caution, risk of electric shock

8 Caution, risk of danger

ISO 7000-0434

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Statement of Conformity

This product complies with the directive of the Council of the European Communities on the
approximation of the laws of the Member States relating to electromagnetic compatibility (EMC
Council Directive 2004/108/EC - valid until April, 19th of 2016, Low Voltage Directive 2014/35/EU ­valid from April, 20th of 2016) and concerning electrical equipment for use within specified voltage
limits (Low-voltage Directive 2006/95/EC - valid until April, 19th of 2016, Low Voltage Directive 2014/
35/EU - valid from April, 20th of 2016).

This conformity has been established by means of tests conducted by Siemens AG according to the
Council Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 for the
EMC directives, and with the standard EN 61010-1 for the low-voltage directive.

The device has been designed and produced for industrial use.

The product conforms to the standard IEC 61557-12.

Further Standards

This product is UL-certified to Standard UL 61010-1, third edition, based on the specification stated in Chapter 13
(Technical Data).
UL File No.: E228586

Open-type Measuring Equipment

2UD1

For further information see UL database on the internet: http://ul.com.
Chose Online Certifications Directory and insert E228586 under UL File Number.

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E50417-H1040-C482-A6, Edition 10.2018

Open Source Software

The product contains, among other things, Open Source Software developed by third parties. The Open Source
Software used in the product and the license agreements concerning this software can be found in the
Readme_OSS.

These Open Source Software files are protected by copyright. Your compliance with those license conditions
will entitle you to use the Open Source Software as foreseen in the relevant license. In the event of conflicts
between Siemens license conditions and the Open Source Software license conditions, the Open Source Soft­ware conditions shall prevail with respect to the Open Source Software portions of the software.

The Open Source Software is licensed royalty-free. Insofar as the applicable Open Source Software License
Conditions provide for it you can order the source code of the Open Source Software from your Siemens sales
contact - against payment of the shipping and handling charges - for a period of at least 3 years since purchase
of the Product. We are liable for the Product including the Open Source Software contained in it pursuant to
the license conditions applicable to the Product. Any liability for the Open Source Software beyond the program
flow intended for the Product is explicitly excluded. Furthermore any liability for defects resulting from modifi­cations to the Open Source Software by you or third parties is excluded. We do not provide any technical sup­port for the Product if it has been modified.

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Contents

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Open Source Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

1 User Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

2 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Device Versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.2 Ordering Information, Scope of Delivery and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3 Device Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.1 Mechanical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.2 Display and Softkeys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

3.3 Electrical Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4 Measurands and Recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.1 Measuring and Recording System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.1 Functioning of the Measuring System according to IEC 61000-4-30 . . . . . . . . . . . . . . . . . . . . . . . 30

4.1.2 Recording of Measurands and Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4.2 Measurands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.2.1 Measurands in 1-phase Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.2.2 Measurands in 3-wire and 4-wire Networks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.2.3 Measurands Depending on the Connection Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.2.4 Data Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

4.3 Display of Measurands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

4.3.1 Measurands and Operational Measurement Uncertainty acc. to IEC 62586-1 Product Standard,

Class S, and Standards IEC 61000-4-30, Ed. 2 and IEC 61000-4-7 and IEC 61000-4-15. . . . . . . 65

4.3.2 Measurands and Operational Measurement Uncertainty acc. to IEC 61557-12. . . . . . . . . . . . . . . 66

4.3.3 Accuracy of the Frequency Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

5 Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

5.1 Unpacking, Inspecting the Delivery, and Installing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

5.2 Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

5.2.1 General Assembly Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

5.2.2 Environmental Protection Hints. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

5.2.3 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

5.3 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

5.3.1 Safety Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

5.3.2 Electrical Connection of SICAM P850/P855 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

5.4 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

5.5 Access Rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

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5.6 Meaning of the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

5.7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5.7.1 Initial Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

5.7.2 Changes During Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

5.7.3 Starting the Device with the Default IP Address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

6 Connection Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

6.1 Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

6.2 Communication Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

6.2.1 Ethernet Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

6.2.2 RS485 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

6.3 Connection Types and Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

6.3.1 Using SICAM P850/P855 in the Power Systems IT, TT, and TN. . . . . . . . . . . . . . . . . . . . . . . . . . 89

6.3.2 Connection Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

6.3.3 Examples - Standard Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

6.3.4 Example - Special Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

7 Operation at Use of a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

7.1 General Usage Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

7.2 Start and Design of the User Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

7.2.1 Initial Start of the Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

7.2.2 Enabling JavaScript . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

7.2.3 Changing the Buffer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

7.2.4 Changing the Compatibility Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

7.2.5 Changing the Security Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

7.2.6 Number of Connections via HTML . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

7.2.7 Layout of the User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

7.2.8 Starting the User Interface during Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

7.3 Configuration of the Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

7.3.1 Device Configuration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

7.3.2 Access to the Passive Set of Parameters by Multiple Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

7.3.3 Setting the Operational Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

7.3.4 HMI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

7.3.5 Recording and Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141

7.3.6 Setting Administrative Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158

7.4 Value View and Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

7.4.1 Process Connections and Automation Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176

7.4.2 Evaluation and Data Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177

7.5 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191

7.5.1 Firmware Upload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

7.5.2 Formatting the SD Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194

7.5.3 AC Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

7.5.4 Presets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195

7.5.5 Message Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199

7.5.6 Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201

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7.6 Example of a Parameterization and Measured Value Evaluation for SICAM P855 . . . . . . . . . . . . . . 204

7.6.1 Task Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

7.6.2 Initial Situation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204

7.6.3 Parameterization as Defined by the Task . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206

7.6.4 Performing the Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211

8 Operation at Use of the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213

8.1 General Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214

8.2 Starting Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216

8.3 Display Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217

8.4 Parameterization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

8.4.1 Menu Tree of the Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219

8.4.2 Measurands Submenus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

8.4.3 Submenus for Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222

8.4.4 Menu Tree of the Settings Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223

8.4.5 User-defined Screens Submenus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234

9 Time Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235

9.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

9.2 Internal Time Keeping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

9.2.1 Time Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

9.2.2 Status Bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236

9.3 External Time Synchronization per NTP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237

9.4 External Time Synchronization via Fieldbus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

9.5 Internal Time Synchronization via RTC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238

10 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239

10.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240

10.2 Calibrating the Alternating Voltage Measuring Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241

10.3 Calibrating the Alternating Current Measuring Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244

10.4 Calibrating the Measuring Voltage Input of Neutral Conductor VN . . . . . . . . . . . . . . . . . . . . . . . . . . 247

10.5 Calibrating the Phase Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250

11 Maintenance, Storage, Transport. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253

11.1 7KG85xxMaintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

11.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

11.3 Transport . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254

12 Failures and LED Indications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255

12.1 General Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 256

12.2 Commissioning during Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

12.2.1 Automatic Start of the Boot Loader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257

12.2.2 Manual Start of the Boot Loader . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 258

12.3 Indications Signaled by LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259

12.4 Troubleshooting and Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264

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13 Technical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 265

13.1 General Device Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

13.1.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 266

13.1.2 Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267

13.1.3 Communication Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269

13.1.4 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

13.1.5 General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271

13.2 Test Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

13.2.1 Electrical Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272

13.2.2 Mechanical Stress Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274

13.2.3 Climatic Stress Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

13.2.4 Safety Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275

13.3 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276

14 Operational Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 281

15 Operating Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285

15.1 Process Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

15.1.1 AC Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286

15.1.2 Binary Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287

15.1.3 LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289

15.2 Automation Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

15.2.1 Limit Violation 1-8 and 9-16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 290

15.2.2 Group Indications 1-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 291

15.3 HMI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

15.3.1 Display Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292

15.3.2 User Defined Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293

15.4 Recording and Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

15.4.1 Event Recorders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

15.4.2 Trigger Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 294

15.4.3 Recorder Management. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296

15.4.4 Memory Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298

15.4.5 Report Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299

15.4.6 Recording Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300

15.5 Administrative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

15.5.1 Time Synchronization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 301

15.5.2 Ethernet Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302

15.5.3 OPC UA PubSub (MQTT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303

15.5.4 Communication Serial . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304

15.5.5 Device and Language . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306

Glossary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307

Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 311

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1 User Information

Application

The multifunctional SICAM P850/P855 devices record and process measurands and events according to
IEC 61000-4-30 Power Quality (PQ) standard. The devices are used on all voltage levels of power-supply
systems. SICAM P850/P855 devices are used in 1-phase systems, 3-phase systems, and 4-phase systems
(with neutral conductor). The devices are used primarily in power utilities but also in other industrial and
commercial applications.

In addition to the measuring function, SICAM P850/P855 features various recorders (average, min and max
values) to record the measurements in programmable time intervals. Waveform capture is available in both
devices. For recording functionality the devices feature a 2-GB memory for data storage.

In SICAM P855 additionally, long-term data for power quality evaluation and events are analyzed and output
as report according to power quality standards, for example, EN 50160 and flexible data export in PQDIF,
COMTRADE or CSV.

The input circuits for voltage measurement are galvanically isolated and can be used in IT, TT, and, TN
networks. To ensure galvanic separation for current measurements, the lines connected to the current
measuring inputs are galvanically separated from the current transformers.

The measurements are obtained from the alternating quantities of current and voltage supplied to the AC
inputs. When no external voltage and current transformers are used, the device can process rated input
alternating voltages of up to V
and rated input alternating currents up to 5 A.

= 400 V (347 V for UL condition) and V

P-N

= 690 V (600 V for UL condition)

P-P

Measurands

The integrated web server can be used to set the parameters and display the measured values on HTML pages
from the connected PC or notebook. The softkeys located on the front of devices with an optional display
enable a limited parameterization and measured value output on the display.

An Ethernet interface and an optional RS485 interface are available for communicating with the control center
and other process automation systems. The RS485 interface supports the transmission of operating measured
values, counts and messages. The Modbus RTU or IEC 60870-5-103 communication protocol can be used,
depending on the device variant.

The following measurands can be recorded or calculated from the measured quantities:

• Alternating voltage and alternating current

• Unbalanced of alternating voltage and alternating current

• Active, reactive, and apparent power

• Active, reactive, and apparent energy

• Power frequency

• Phase angle

• Power factor and active power factor

• THDS (Subgroup Total Harmonic Distortion) of alternating voltage and alternating current

• Harmonics of alternating voltage and alternating current

• Flicker acc. to IEC 61000-4-15 (only SICAM P855)

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1 User Information

The uncertainty of operational measurements of the measurands is defined as per IEC 62586-1 product
standard, class S (leading standard), the IEC 61000-4-30 power quality standard, and the IEC 61557-12
standard.

For detailed information on measurands and measurements, see Chapter 4.2 and the technical data in
Chapter 13.1.

Functionality of the Recorders in SICAM P850

The recorders are capable of recording both measurands and events in parameterizable time intervals. The
following recorder types are used in SICAM P850:

• Measurement recorder: recording parameterized periods, for example, 10-second frequency, aggregation
of current, power etc.

• Fault recorder: Recording of sampled values of voltage and current using programmable triggers.

The device features a 2-GB memory for storing the recorder data.

Functionality of the Recorders in SICAM P855

The recorders are capable of recording both measurands and events in parameterizable time intervals. The
following recorder types are used in SICAM P855:

• Measurement recorder: recording of PQ measurands (acc. to IEC 61000-4-30) and non-PQ measurands
over parameterized periods, for example, 10-second frequency, aggregation of voltage, current, power
etc.

• Trend recorder: long-term recording and monitoring of the voltage change history over a parameterized
period of time in programmable tolerance ranges; 1/2 RMS values

• Fault recorder: Recording of sampled values of voltage and current using programmable triggers.

• Event recorder: recording of voltage events, frequency events, and voltage unbalance events

The device features a 2-GB memory for storing the recorder data.

Communication

To communicate with the systems control and other process automation equipment, the device features an
Ethernet interface and optionally an RS485 interface.

Ethernet supports the device parameterization, the transmission of measured data, counter values and
indications/events, and the time synchronization via NTP. The communication protocols are HTTP,
Modbus TCP and IEC 61850.

The RS485 interface supports the transmission of the measured data, counter values and indications, and the
time synchronization. Depending on the device version, you can use either the Modbus RTU or the
IEC 60870-5-103 communication protocol.

Time Synchronization

During operation SICAM P850/P855 needs the date and time for all time-relevant processes. This ensures that
a common time basis exists when communicating with peripheral devices and enables time stamping of the
process data. The following types of time synchronization can be executed:

• External time synchronization via Ethernet NTP (preferred)

• External time synchronization via fieldbus using the Modbus RTU or the IEC 60870-5-103 communication
protocol

• Internal time synchronization via RTC (if external time synchronization is not available)

Parameterization

Parameters are set using an internal Web browser with HTML pages from the connected PC or notebook.
Internet Explorer 6 (or higher) is required for this purpose. Devices featuring a display offer a limited
parameterization function using the front softkeys.

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2 Overview

2.1 Device Versions 18

2.2 Ordering Information, Scope of Delivery and Accessories 21

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2 Overview

2.1 Device Versions

2.1 Device Versions

The multifunctional SICAM P850/P855 devices are used to detect, calculate, evaluate, display, and transmit
measured electrical quantities such as alternating current, alternating voltage, power values etc.

SICAM P850 devices feature memory options for recorder functions such as mean values, minimum and
maximum values, and fault records. SICAM P855 device additionally feature memory options for event
recorder and trend record.

Consistent Device Properties

All devices consistently feature the following properties:

• Device type:

 Plastic case 96 mm x 96 mm x 100 mm (W x H x D)
 Web server for parameterization, visualization, and data management
 Galvanically isolated voltage measuring inputs

• Input and output circuits:

 4 inputs for alternating voltage measurements
 3 inputs for alternating current measurements
 2 individually programmable binary outputs

• Measurements:

 Voltage V
 Current I
 Basic frequency f
 Active power P (class 0.2S)
 Reactive power Q
 Apparent power S
 Active power factor cos phi
 Measurement up to the 40th harmonic of voltage and current
 Limit violations
 Energy measurements

• Other

 Transmitting measured values using communication protocols
 Internal 2-GB memory (SD card)
 UL Listing

Variants

SICAM P850/P855 is available in different variants:

• Device type:

 Panel flush mounting device with display for measured values and parameterization
 DIN rail device without display

• Communication via Ethernet

 Only Modbus TCP protocol
 Modbus TCP protocol or IEC 61850 server protocol

• Serial communication

 With RS485 interface:

- with Modbus RTU protocol

- with Modbus RTU protocol and IEC 60870-5-103 protocol

 Without RS485 interface

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• Degree of protection of front

SICAM P850/P855 as DIN Rail Device, Terminal Side

SICAM P850/P855 as DIN Rail Device,

with RS485 Interface

DIN Rail Side

 IP20 for DIN rail devices without display
 IP40 or IP51 for panel flush mounting devices with display

• Additional measurands:

 Minimum/mean/maximum values

• Data export acc. to IEEE Std. 1159-3

 COMTRADE data
 CSV data

Other Special Functions of SICAM P855

• Additional measurands:

 Power Quality measurements acc. to IEC 61000-4-30
 Event detection, for example V
 Flicker acc. to IEC 61000-4-15

• Evaluations

 Output of power quality reports

• Data export acc. to IEEE Std. 1159-3

 PQDIF data

2 Overview

2.1 Device Versions

dips

SICAM P850/P855 Variant, DIN Rail Device

Figure 2-1 SICAM P850/P855 Variant, DIN Rail Device

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2 Overview

SICAM P850/P855 for Panel Flush Mounting, Display Side

SICAM P850/P855 for Panel Flush Mounting, Terminal Side,

with RS485 Interface

SICAM P850/P855 for Panel Flush Mounting, Display Side

SICAM P850/P855 for Panel Flush Mounting, Terminal Side,
with RS485 Interface

2.1 Device Versions

SICAM P850/P855 Variant with Graphic Display without Cover, Panel Flush Mounting

Figure 2-2 SICAM P850/P855 Variant with Graphic Display without Cover

SICAM P850/P855 Variant with Graphic Display and Cover, Panel Flush Mounting

Figure 2-3 SICAM P850/P855 Variant with Graphic Display and Cover

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2.2 Ordering Information, Scope of Delivery and Accessories

2.2 Ordering Information, Scope of Delivery and Accessories

Ordering Information

2 Overview

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21SICAM P850/P855, 7KG85xx, Device Manual

2 Overview

2.2 Ordering Information, Scope of Delivery and Accessories

Use the following ordering code to order SICAM P850/P855 devices:

Figure 2-4 Ordering Code for SICAM P850/P855

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Scope of Delivery

The delivery comprises the following components depending on the ordering code:

• SICAM P850/P855 according to ordering code (see Figure 2-4)

• Battery (insulated in the battery compartment of the device)

• Product Information E50417-B1050-C482

Accessories

You can order the following accessories:

• Device Manual E50417-H1040-C482 (download available at http://www.powerquality.de)

• RS485 bus terminating plug 220  in a 9-pin D-sub connector plug: 7XV5103-5AA00

• Sockets for alternating voltage inputs

2 Overview

2.2 Ordering Information, Scope of Delivery and Accessories

Order via:

Phoenix Contact GmbH & Co. KG

Item number: 1700734

Product name: GMSTB 2,5 HCV/ 4-ST-7,62 BK TS

Minimum order quantity: 50 pieces

• Various cables as listed in the following tables:

Table 2-1 RS485-Y Bus Cable (2-Wire, Shielded, with 9-Pin D-sub Connector Plugs)

Cable Length Order No.

1 m 7XV5103-0AA01

3 m 7XV5103-0AA03

5 m 7XV5103-0AA05

10 m 7XV5103-0AA10

Table 2-2 RS485 Bus Extension Cable (2-Wire, Shielded, with 9-Pin D-sub Connector Plugs)

Cable Length Order No.

10 m 7XV5103-1AA10

20 m 7XV5103-1AA20

30 m 7XV5103-1AA30

40 m 7XV5103-1AA40

50 m 7XV5103-1AA50

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2 Overview

2.2 Ordering Information, Scope of Delivery and Accessories

Table 2-3 Ethernet Patch Cable (Double Shielded (SFPT), LAN Connector Plugs on Both Sides)

Cable Length Order No.

0.5 m 7KE6000-8G-D00-0AA5

1.0 m 7KE6000-8G-D00-1AA0

2.0 m 7KE6000-8G-D00-2AA0

3.0 m 7KE6000-8G-D00-3AA0

5.0 m 7KE6000-8G-D00-5AA0

10.0 m 7KE6000-8G-D01-0AA0

15.0 m 7KE6000-8G-D01-5AA0

20.0 m 7KE6000-8G-D02-0AA0

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3 Device Design

3.1 Mechanical Design 26

3.2 Display and Softkeys 27

3.3 Electrical Design 28

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3 Device Design

RJ45 with

4LEDs

2LEDs

RS485

Cover of battery
compartment

Terminal block for

Default IP address
Default subnet mask

LED RUN

LED ERROR

LED H1

LED H2

Softkeys

F1 to F4

Terminal blocks for

measurements (voltage, current)

power supply

Terminal block for
binary outputs

Display

Terminal side

Display side

3.1 Mechanical Design

3.1 Mechanical Design

The electrical modules are installed in a plastic case with the dimensions 96 mm x 96 mm x 100 mm
(W x H x D).

In panel flush mounting devices, the display side accommodates the display, 4 softkeys located below and 4
LEDs of which the H1, H2, and ERROR LEDs can be parameterized. The ERROR LED can only be
parameterized for error messages.

The device top side holds the RJ45 Ethernet plug connector with 2 LEDs. 4 additional LEDs are identical to the
LEDs on the display side. At the cover of the battery compartment there is a labeling strip for the configurable
LEDs H1/H2 and a battery symbol that indicates the polarity. The label is also located on the top side and
provides among other information the most important rated data of the device. A lithium battery is located under
the removable cover of the battery compartment.

SICAM P850/P855 devices can also contain a D-sub connector plug as RS485 interface (see Figure 3-1) as
shown in the ordering information (see Chapter 2.2).

26 SICAM P850/P855, 7KG85xx, Device Manual

Figure 3-1 Layout of the Panel Flush Mounting Version of SICAM P850/P855 with Display

NOTE

DIN rail devices have a DIN rail support instead of the display. Therefore, this device side is referred to as the
DIN rail side.

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3.2 Display and Softkeys

MAX   MENU

Voltage ph-n MAX 1.1

n 2.00 V Date/Time

c 229.00 V Date/Time

b 231.00 V Date/Time

a 230.00 V Date/Time

Title

Display area

Softkey functions

Softkeys F1 to F4

Display

The layout of the display is shown in the following figure.

3 Device Design

3.2 Display and Softkeys

Figure 3-2 Display and Softkeys

The top line (title) shows the name of the current display in the display area.
The display area below shows parameter settings, measured values, and graphic pictures.

The bottom line shows the 4 current functions of the softkeys below the display used to set the parameters.

Softkeys

The 4 softkeys on the display side are used to make the desired entries at the device.

To call and activate the IP address, press softkey F4 (for > 3 s, see Figure 3-2) on the right during system
startup if necessary. The IP address and the standard subnet mask are imprinted on the side panel of the device
(see Figure 3-1).

Chapter 8 gives a detailed description of the softkey functions.

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3 Device Design

4 x AC

voltage

measuring

inputs

Terminal

Power

supply

Terminal

3 x AC
current

measuring

inputs

Terminal

2 x Binary

outputs

Terminal

ADC

LED Ethernet

RS485

interface

D-Sub

DSP

DisplaySoftkeys

3.3 Electrical Design

3.3 Electrical Design

SICAM P850/P855 contains the following electrical modules depending on the device version:

• Digital signal processor (DSP)

• Display and Softkeys (optional)

• 4 inputs for alternating voltage measurements

• 3 inputs for alternating current measurements

• 2 binary outputs

• Supply voltage

• Ethernet interface

• Serial RS485 interface (optional)

Figure 3-3 Block Diagram SICAM P850/P855 with Display (Optional) and RS485 Interface (Optional)

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4 Measurands and Recording

4.1 Measuring and Recording System 30

4.2 Measurands 43

4.3 Display of Measurands 65

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4 Measurands and Recording

RTC

10-minute

limit

k

10-minute interval (x+1)

j

10/ 12 pe riods

i

1

2 3

Over la pping a rea

10-minute interval (x)

10 /12 peri ods

10/ 12 pe riods 10/12 pe riods

10 /12 periods

10 / 12 per iods

4.1 Measuring and Recording System

4.1 Measuring and Recording System

4.1.1 Functioning of the Measuring System according to IEC 61000-4-30

SICAM P850/P855 devices measure the power quality according to IEC 61000-4-30 in 1-phase or multi-phase
distribution systems. The measuring system is implemented according to class A. In terms of functional scope,
measuring ranges, and accuracy, the SICAM P850/P855 devices are class S.

The basic measuring interval for determining the values for mains voltage, harmonics of mains voltage, and
mains voltage unbalance is a 10-period time interval for 50-Hz distribution systems or a 12-period time interval
for 60-Hz distribution systems. The measurement of the 10-/12-period time intervals is resynchronized at each
RTC 10-minute limit.

Subsequently, the values for the 10-/12-period time intervals are aggregated over additional time intervals (for
example, 10-minute interval at SICAM P850/P855).

10-Minute Interval (SICAM P850/P855)

The value aggregated in a 10-minute interval is tagged with the absolute time (for example 01:10:00). The time
at the end of the aggregation interval is indicated as the time qualifier. The values for the 10-minute time interval
are calculated without interruption from the 10-/12-period time intervals.

• Each 10-minute interval begins at an RTC 10-minute limit. At this 10-minute limit, the 10-/12-period time
intervals are aggregated over a 10-minute interval. The last 10-/12-period time interval in a 10-minute
aggregation interval overlaps in time at an RTC 10-minute limit. Each overlapping 10-/12-period time
interval (for the overlapping area, see Figure 4-1) is included in the aggregation interval of the preceding
10-minute interval.

• The aggregation interval enables the power system quality to be evaluated according to EN 50160. The
aggregation interval can be adjusted to other applications using a parameter. A shorter aggregation
interval increases the storage capacity required for measured values and reduces the maximum possible
recording time in the memory.

30 SICAM P850/P855, 7KG85xx, Device Manual

Figure 4-1 Synchronization of the Aggregation Intervals for Class A

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