Siemens SICAM P27 User manual

SICAM P27
3-phase Harmonic Power
Meter
V1.0
Manual
E50417-H8940-C560-
Preface
Content
Overview 1
Technical Data 2
Functions 3
Operation and Display 4
Installation and Wiring 5
Communication 6
Maintenance 7
Ordering Number 8

Siemens Power Automation Ltd. Order No.: E50417-H8940-C560-
NOTE
For your own safety, observe the warnings and safety instructions contained in this document, if available.
Disclaimer of Liability
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: V01.10.01
Release date: 
Copyright
Copyright © Siemens AG 2015. All rights reserved.
The disclosure, duplication, distribution and editing of this docu-
ment, or utilization and communication of the content are not per-
mitted, 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®, DIGSI®, SIGUARD®, SIMEAS®, and SICAM® are
registered trademarks of Siemens AG. Any 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.

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  3
Preface
Purpose of this manual
This manual describes the functions, operation, installation, and commissioning of devices 3-phase Current
Power Meter-> In particular, one will find:
• Information regarding the configuration of the scope of the device and a description of the device functions
> Chapter 3;
• Instructions for Operation and Display > Chapter 4;
• Technical Data > Chapter 2;
Target Audience
Protection engineers, commissioning engineers, personnel concerned with adjustment, checking, and service
of selective protective equipment, automatic and control facilities, and personnel of electrical facilities and
power plants.
Additional Support
Should further information on the System SICAM be desired or should particular problems arise which are not
covered sufficiently for the purchaser's purpose, the matter should be referred to the local Siemens represen-
tative.
Our Customer Support Center provides a 24-hour service.
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Notes on Safety
This document is not a complete index of all safety measures required for operation of the equipment
(module or device). However, it comprises important information that must be followed for personal safety, as
well as 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 result if the measures specified are not taken.
✧Comply with all instructions, in order to avoid death or severe injuries.
WARNING
WARNING means that death or severe injury may result if the measures specified are not taken.
✧Comply with all instructions, in order to avoid death or severe injuries.

Preface
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
4
CAUTION
CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken.
✧Comply with all instructions, in order to avoid moderate or minor injuries.
NOTICE
NOTICE means that property damage can result if the measures specified are not taken.
✧Comply with all instructions, in order to avoid property damage.
NOTE
Important information about the product, product handling or a certain section of the documentation which
must be given particular attention.
Qualified Electrical Engineering Personnel
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.
Proper Use
The equipment (device, module) may be used only for such applications as set out in the catalogs and the
technical description, and only in combination with third-party equipment recommended and approved by
Siemens.
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).
• Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the
equipment, ensure that the current-transformer circuits are short-circuited.
• The limiting values stated in the document must not be exceeded. This must also be considered during
testing and commissioning.
■

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  5
Contents
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
1.2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
2.1 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
3 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
3.1 Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
3.2 Energy Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
3.3 Limit violation Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
3.4 Display and Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.5 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.6 Permission and Security Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
3.7 Digital Input and Output Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
4 Operation and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
4.1 Full-screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.2 Cyclic Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
4.3 Key Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
5 Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
5.1 Overall Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.2 Precautions of Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
5.3 Terminals and Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
6 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
6.1 Use of Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
6.2 Introduction of MODBUS-RTU Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
6.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
6.2.2 Function of Application Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
6.2.3 CRC Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
6.2.4 Information mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
7.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
8 Ordering Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
8.1 Ordering Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56

Contents
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
6

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  7
Overview 1
1.1 Introduction 8
1.2 Features 8

Overview
1.1 Introduction
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
8
1.1 Introduction
SICAM P27 3-phase harmonic power meter integrates measurement, power metering, remote communication
and control, LCD screen and network communication functions. It is designed for measuring power grid
parameters such as voltage, current, power, power factor and frequency and active and reactive energy. With
2nd to 50th harmonic analysis, it is capable of calculating various power quality and ctive and reactive energy.
RS485 communication supports MODBUS-RTU protocol. Binary input and output are provided.
This product is extensively applicable to power substation and distribution automation system, industrial control
and industrial automation system, energy management system and community power monitoring, etc.
This 3-phase electronic multi-function power meter meets following standards:
• IEC 62052-11:2003 (Electricity metering equipment (a.c.) General requirements, tests and test conditions-
Part 11: Metering equipment) standard
• IEC 62053-22:2003 static meters for active energy (classes 0.2 S and 0.5 S)
• IEC 62053-23:2003 static meters for reactive energy (classes 2 and 3)
• Modbus-RTU
1.2 Features
This product uses high-precision sampling and metering unit and high-speed MCU data processing unit, sup-
porting high-precision, wide-range and accurate measurement and quick data analysis; segmented multi-line
WVA LCD, realizing various and abundant display; white backlight for LCD, satisfying the need for viewing data
in dark environment; NVRAM, supporting long-time data storage without data loss even in the event of power
failure; RS485 communication port and industrial standard communication protocols, realizing flexible and con-
venient networking; and different communication modules, satisfying different interface need of different users.
■

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  9
Technical Data 2
2.1 Technical Data 10

Technical Data
2.1 Technical Data
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
10
2.1 Technical Data
Item Technical Data
Product standard IEC61557-12:2007
Input connection 3-phase-3-wire, 3-phase-4-wire, single phase
Measurement
Voltage
Reference voltage Un: AC380 V, AC220 V, AC100 V,
AC57.7 V
Measuring range: 10 V ... 276 V phase voltage
Maximum measuring range: 400 V phase voltage
Power consumption: < 0.VA (VLQJOHSKDVH#9$&)
Accuracy: RMS 0.2%
Resolution: 0.01 V
Current
Rated current In: 1 A, 5 A
Measuring range: 0.015 A ... 6 A
Maximum measuring range: 9 A
Power consumption: < 0.VA (VLQJOHSKDVH#$)
Accuracy: RMS 0.2%
Resolution: 0.001 A
Power
(active, reactive, ap-
parent)
Accuracy: 0.5%
Resolution: 0.001 kW/kVar/kVA
Power grid frequency
Measuring range: 45 Hz ... 65 Hz
Accuracy: 0.2%
Resolution: 0.01 Hz
Harmonic Frequency: 2nd ... 50th
Precision: 5%
Metering
Active power Accuracy level: 0.5 S, Acc. To IEC 62053-22
Resolution: 0.01 kWh, 5000 imp/kWh
Reactive power Accuracy level: Class 2, Acc. To IEC 62053-23
Resolution: 0.01 kvarh, 5000 imp/kvarh
Digital signal
Power pulse output 1 active power pulse output
Opto-coupler isolation, 4,000 VRMS
Binary output
1 electromagnetic relay output
Normal Open Contact
Contact capacity: AC 250 V /3 A, DC 30 V /3 A
Binary input 2 dry contact inputs
Opto-coupler isolation, 4,000 VRMS
Communication RS-485 port
Interface type: Twisted Pair, Half Duplex Transmission
Communication rate: 600 bps ... 38,400 bps
Protocol: Modbus-RTU
Environment
Operating temp. -25 ℃... +60 ℃
Operating temp. limit -35 ℃... +70 ℃
Relative humidity ≤95% (condensation free)

Technical Data
2.1 Technical Data
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  11
■
Others
Operating power
supply
AC or DC power supply
Max. input range: 40 V ... 420 V
Power consumption: ≤1 W, 2 VA
Dimension
Overall dimension (mm): 72×72×85
Panel cut out size (mm): 67×67
IP53
Weight Approx. 300 g
Item Technical Data

Technical Data
2.1 Technical Data
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
12

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  13
Functions 3
3.1 Measurement 14
3.2 Energy Metering 15
3.3 Limit violation Alarm 16
3.4 Display and Buttons 17
3.5 Communication 17
3.6 Permission and Security Management 17
3.7 Digital Input and Output Interface 18

Functions
3.1 Measurement
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
14
3.1 Measurement
This meter is provided with various measuring functions. Power grid parameters and index measurable are as
follows:
• Voltage of each phase and mean voltage
• Voltage of each line and mean voltage
• Current of each phase, average current and neutral current
• Overall and separate active power, reactive power and apparent power of each phase
• Phase angle of voltage and current of each phase
• Overall and separate power factor of each phase
• Power grid frequency and measuring range 45 Hz to 65 Hz
• Effective value and ratio of 2nd to 50th harmonic voltage and harmonic current of each phase
- Harmonic voltage ratio:
where, Uh- No. h harmonic voltage (RMS); U1- fundamental voltage (RMS).
- Harmonic current ratio:
where, Ih- No. h harmonic current (RMS); I1- fundamental current (RMS).
• Total harmonic voltage distortion and total harmonic current distortion of each phase
- Total harmonic voltage distortion:
- Total harmonic current distortion:
• Voltage wave crest factor (CF) of each phase, indicating peak of distorted waveform

Functions
3.2 Energy Metering
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  15
• Current K coefficient Kf of each phase, an critical index measuring current quality
where, Ih- effective value of No. h harmonic current (RMS); k - range 1 to 50, configurable with commu-
nication, factory default 50.
• Telephone harmonic form factor (THFF) of each phase Harmonic interference will generate communication
system noise, reducing quality of connection. Consultative Committee of International Telephone and Tele-
graph (CCITT) measures harmonic interference to telecommunication using weight coefficient Phof noise,
expressed with THFF.
where, Ph- weight coefficient of noise.
3.2 Energy Metering
This meter can meter various power data:
• combined active and supply and demand active energy
• combined reactive and four-quadrant reactive energy
• total fundamental active energy and total harmonic active energy
• supply and demand active energy of each phase, combined reactive energy of each phase, fundamental
active energy and harmonic active energy of each phase

Functions
3.3 Limit violation Alarm
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
16
3.3 Limit violation Alarm
1. This product is provided with limit violation alarm function. User may select from voltage, current, power,
power factor and frequency parameters up to 6 data groups at the same time as detection object and set
upper and lower limits and judgment condition for them. Alarm will be activated when measured value is over
the set limit. This product is provided with 2 relay outputs. When alarm parameters are configured that output
is made from certain relay which is at automatic mode (not manual), limit violation alarm signal can be output
through such relay (relay closing).
2. Up to 6 limit violation alarm parameters can be set at the same time within the product. Configuration flow of
each limit violation alarm parameter: select type of detected data-set threshold of detected data-set judgment
condition-select output relay for alarm signal.
• Code of various detected data: (hexadecimal number for Modbus-RTU code)
When code of detected data is FF, limit violation alarm function of such group is off.
• Threshold of detected data: threshold judging whether detected value is out of limit; Different units for
different data types: such as voltage-V, current-A, active-KW, reactive power-KVAR, apparent-KVA,
frequency-Hz.
• Judging condition: 0 means alarm activated when exceeding limit; 1 means alarm activated when falling
below limit.
• Alarm signal output relay: 0 means no alarm signal output; 1 means alarm signal outputted from relay 1.
3. Example of alarm parameter setting. Set one limit violation alarm parameter to automatic detection and alarm
for "Phase A voltage", assuming that alarm threshold is 240 V, judging criterion is "over limit) and signal is
outputted from relay 2.
Use MODBUS RTU protocol to set alarm parameter: set 0110 address to "07", 0111 to "0000", 0112 to
"5DC0" (multiply "240" by 100 to generate "24,000" and convert it into "00005DC0"), 0113 to "00" and 0114
to "02".
MODBUS code Content of data MODBUS code Content of data
00 Phase A power factor 14 Phase A active power
01 Phase B power factor 15 Phase B active power
02 Phase C power factor 16 Phase C active power
03 Total power factor 17 Total active power
06 Frequency 18 Phase A reactive power
07 Phase A voltage 19 Phase B reactive power
08 Phase B voltage 1A Phase C reactive power
09 Phase C voltage 1B Total reactive power
0B Uab line voltage 1C Phase A apparent power
0C Ubc line voltage 1D Phase B apparent power
0D Uca line voltage 1E Phase C apparent power
0F Phase A current 1F Total apparent power
10 Phase B current
11 Phase C current
12 Neutral current

Functions
3.4 Display and Buttons
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  17
3.4 Display and Buttons
This product uses large-screen WVA multi-line LCD to provide visual and various display. The screen is
provided with white backlight, enabling clear display in dark environment. Specific data information can be
obtained through display with button operation. For details, see Chapter Operation and Display.
3.5 Communication
RS485 port is provided for parameter setting and reading of various data. For specific description, see Chapter
Communication.
3.6 Permission and Security Management
1. This product is provided with programming permission management function.
• L0 password: used for meter reset, setting all parameters and modifying L0, L2 and L4 passwords;
• L2 password: used for meter reset, setting all parameters and modifying L2 and L4 passwords;
• L4 password: used for parameter setting and modifying L4 password, not for meter reset, clearing extreme
values and PT/CT ratio setting.
• All level default PASSWORD is "000000"
2. Parameter setting is available only when this product is in programmable state. Steps for entering
programming state: press " " and " " at the same time to enter "PASS" screen; input correct
password and press " " to enter "SET" screen and enable programmable state. After entering
programmable state, programmable state prompt appears on the bottom right corner of LCD. Programmable
state will remain valid in 10 minutes after program button is pressed and become invalid after power down.
3. If incorrect password is used to set this product continuously (including communication setting and button
programming) up to specific number of times (factory default 5 times), parameter setting function will be
locked (factory default 60 minutes). Error count will be reset after setting once using correct password if such
count is less than specific limit. Error count of password and lock time can be set (available in factory state).

Functions
3.7 Digital Input and Output Interface
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
18
3.7 Digital Input and Output Interface
Power Pulse Output
This meter provides one active power pulse output, with internal opto-isolation, pulse output width (80±20) ms,
maximum allowable passing current 10 mA (DC) and operating voltage range 5 V to 80 V (DC).
Figure 3-1 Circuit Diagram of Power Pulse Output Interface
Binary Input Interface
This product is provided with 2-digit binary inputs interface based on passive dry contact. Terminals are identi-
fied as DI1, DI2 and COM. COM is the common terminal.
Figure 3-2 Circuit Diagram of Binary Input Interface
Relay Output Interface
This product is provided with one relay output interfaces for alarm indication or protection control output in many
conditions. Electric parameter of internal relay: AC 250 V/DC 30 V, 3 A.
Figure 3-3 Circuit Diagram of Relay Output Interface
■

SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date  19
Operation and Display 4
4.1 Full-screen Display 20
4.2 Cyclic Display 20
4.3 Key Definition 22

Operation and Display
4.1 Full-screen Display
SICAM P27, 3-phase Harmonic Power Meter, User Manual
E50417-H8940-C560-, Release Date 
20
4.1 Full-screen Display
Figure 4-1 Description of LCD Indication
4.2 Cyclic Display
Key Functions at Cyclic Display Mode
Screen Lock in Cyclic Display State
Data in display area A or B can be locked in cyclic display state to enable long-time monitoring of data in certain
area.
Steps: press " ", select the desired display area (target data will blink thrice), and press " " to lock, and
vice versa for unlocking.
Cyclic Display Parameter
Duration: 1 to 99 sec., configurable;
Number of items: to be defined with one byte. 4 high 4 bits are number of items in display area A while 4 low 4
bits are number of items in display area B. 16 items are acceptable to each area. At any time, display area A
and display area B should have at least one cyclic display item.
Cyclic Display State
Cyclic display data in areas A and B can be defined by user. User may develop cyclic display scheme previously
through inquiring "Code list of optional settings in areas A and B".
Code list of optional settings in area A:
Key symbol ▲▼
Function Switching from cyclic display to
buttom display
Lock/unlock blinking
display
Switching between display
areas A and B (blinking
prompt)
Data item Data type (current value) Data item Data type (current
value)
Transient Maximun Minimum Transient
Phase voltage 0 1 2 Voltage distortion rate 24
Line voltage 3 4 5 Current distortion rate 25