Siemens SICAM P38, SICAM P39 User Manual

SICAM P38 P39

Preface

Content

Overview 1
Technical Data 2

3-phase Power Meter with
Multi-Tariff function

V1.30

Manual

Functions 3
Operation and Display 4
Installation and Wiring 5
Communication 6
Maintenance 7
Ordering Number 8

E50417-H8940-C564-4

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.

Copyright

Copyright © Siemens AG 2015. 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®, 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.

Document Version: V01.10.01

Release date:

06.2018

Siemens Power Automation Ltd. Order No.: E50417-H8940-C564-4

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

T arget 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 represen­tative.

Our Customer Support Center provides a 24-hour service.

Phone: [phone]

Fax: [phone]

E-mail: [e-mail]

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.

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Preface

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.

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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 Parameter Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

3.2 Power Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

3.3 Demand Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

3.4 Settlement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

3.5 Time Division . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

3.6 Event Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.7 Freezing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

3.8 Limit violation Alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

3.9 Display and Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.10 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.11 Permission and Security Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

3.12 Digital Input and Output Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

4 Operation and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

4.1 Full-screen Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.2 Cyclic Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

4.3 Key Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

5 Installation and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

5.1 Total Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.2 Precautions of Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

5.3 Terminals and Wiring Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

6 Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43

6.1 Use of Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44

6.2 Introduction of MODBUS-RTU Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

6.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

6.2.2 Function of Application Layer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

6.2.3 CRC Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

6.2.4 Information mapping table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

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Contents

7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

7.1 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

8 Ordering Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

8.1 Ordering Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

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Overview 1

1.1 Introduction 8

1.2 Features 8

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Overview

1.1 Introduction

1.1 Introduction

SICAM P38 & P39 3-phase Multi-function Power Meter integrate measurement, record, power metering,
remote communication and control, large screen LCD and network communication functions. This meter can
measure various parameters of power grid, such as voltage, current, power, power factor and frequency. It is
provided with 2
active and reactive energy. It has multi-tariff energy and multi-tariff demand functions. P38 has two independent
RS-485 ports; P39 has 1 RS-485 & 1 Ethernet port. Device supports MODBUS-RTU protocol (serial & TCP/IP).
Besides, it has binary input and output.

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 conditions­Part 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

nd

to 50th harmonic analysis and calculation of multiple power quality parameters. It can calculate

1.2 Features

This meter uses high-precision sampling and metering unit and high-speed MCU data processing unit, support­ing 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; high-precision clock chip with temperature compensation, ensuring accuracy of clock within operating tem­perature range; double communication ports and industrial standard communication protocols, realizing flexible
and convenient networking; and different communication modules, satisfying different interface need of differ­ent users.

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Technical Data 2

2.1 Technical Data 10

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Technical Data

2.1 Technical Data

2.1 Technical Data

Item Technical Data

Product standard IEC61557-12:2007

Input connection 3-phase-3-wire, 3-phase-4-wire, single phase

Voltage

Measurement

Metering

Digital signal

Communication

Environment Operating temp. -25 ℃ ... +60 ℃

Current

Power

(active, reactive, ap­parent)

Power grid frequency

Harmonic

Active power

Reactive power

Power pulse output

Binary output

Binary input

RS-485 port

Reference voltage U
AC57.7 V

: AC380 V, AC220 V, AC100 V,

n

Measuring range: 10 V ... 276 V phase voltage

Maximum measuring range: 400 V phase voltage

Power consumption: < 0.1 VA (single phase @220VAC)

Accuracy: RMS 0.2%

Resolution: 0.01 V

Rated current I

: 1 A, 5 A

n

Measuring range: 0.015 A ... 6 A

Maximum measuring range: 9 A

Power consumption: < 0.3 VA (single phase @5A)

Accuracy: RMS 0.2%

Resolution: 0.001 A

Accuracy: 0.5%

Resolution: 0.001 kW/kVar/kVA

Measuring range: 45 Hz ... 65 Hz

Accuracy: 0.2%

Resolution: 0.01 Hz

nd

th

Frequency: 2

... 50

Precision: 5%

Accuracy level: 0.5 S, Acc. To IEC 62053-22

Resolution: 0.01 kWh, 5000 imp/kWh

Accuracy level: Class 2, Acc. To IEC 62053-23

Resolution: 0.01 kvarh, 5000 imp/kvarh

2 electric energy (active and reactive) pulse outputs

Opto-coupler isolation, 4,000 V

RMS

2 electromagnetic relay output

Normal Open Contact

Contact capacity: AC 250 V /3 A, DC 30 V /3 A

4 dry contact inputs

Opto-coupler isolation, 4,000 V

RMS

Interface type: Twisted Pair, Half Duplex Transmission

Communication rate: 600 bps ... 38,400 bps

Protocol: Modbus-RTU

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Others

Item Technical Data

Operating temp. limit -35 ℃ ... +70 ℃

Relative humidity ≤ 95% (condensation free)

Clock < 0.5 sec./day (-40 ℃ .... +85 ℃ )

AC or DC power supply

Operating power
supply

Max. input range: 40 V ... 420 V

Power consumption: ≤ 2 W, 4 VA

Total dimension (mm): 96×96×95

Dimension

Panel cut out size (mm): 92×92

IP53

Weight Approx. 450 g

Technical Data

2.1 Technical Data

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Technical Data

2.1 Technical Data

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Functions 3

3.1 Parameter Measurement 14

3.2 Power Metering 15

3.3 Demand Measurement 16

3.4 Settlement 17

3.5 Time Division 17

3.6 Event Record 18

3.7 Freezing 18

3.8 Limit violation Alarm 19

3.9 Display and Buttons 20

3.10 Communication 20

3.11 Permission and Security Management 20

3.12 Digital Input and Output Interface 21

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Functions

3.1 Parameter Measurement

3.1 Parameter 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

• Total and separate active power, reactive power and apparent power of each phase

• Phase angle of voltage and current of each phase

• Total and separate power factor of each phase

• Power grid frequency and measuring range 45 Hz to 65 Hz

nd

• Effective value and ratio of 2

- Harmonic voltage ratio:

to 50th harmonic voltage and harmonic current of each phase

where, Uh - No. h harmonic voltage (RMS); U1 - fundamental voltage (RMS).

- Harmonic current ratio:

where, I

- No. h harmonic current (RMS); I1 - fundamental current (RMS).

h

• 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

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Functions

3.2 Power Metering

• Current K coefficient K

of each phase, a critical index measuring current quality

f

where, I

- effective value of No. h harmonic current (RMS); k - range 1 to 50, configurable with communi-

h

cation, factory default 50.

• Telephone harmonic form factor (THFF) of each phase

Harmonic interference will generate communication system noise, reducing quality of connection. Consul-

tative Committee of International Telephone and Telegraph (CCITT) measures harmonic interference to
telecommunication using weight coefficient Ph of noise, expressed with THFF.

where, P

- weight coefficient of noise.

h

3.2 Power Metering

This meter can meter various energy:

• Combined active and supply and demand active energy

• Combined reactive and four-quadrant reactive energy

• Fundamental active power and total harmonic active energy

• Import and export active energy of each phase, combined reactive energy of each phase, fundamental active
energy and harmonic active energy

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Functions

3.3 Demand Measurement

3.3 Demand Measurement

1. Terms and Definitions

Demand means average power within specified period. The maximum value of demand recorded within

specified period is maximum demand.

Current demand means average current within specified period. The maximum current value recorded within

specified period is called maximum current demand.

Demand cycle means continuous equal intervals for measuring average power.

Sliding window time means time interval for measuring maximum demand through recursion. It is less than

demand interval.

Temporary unit means the memory unit of the meter, used for temporary storage of power value or current

value when calculating maximum demand.

Demand interval can be selected from 5, 10, 15, 30 and 60 min. Sliding window time can be selected from

1, 2, 3 and 5 min. Demand interval is five times the sliding window time and is 60 at maximum.

2. In the event of power-on, zero clearing, clock adjustment and interval change of voltage line, the meter will
execute demand measurement depending on demand interval from current moment. When the first demand
interval is completed, maximum demand will be recorded at slip interval. Maximum demand will not be re­corded within an incomplete demand interval.

3. When power direction changes, temporary demand unit will be cleared. Temporary demand unit will not be

cleared when across rate period to ensure continuity of maximum demand measurement. Zero clearing of
temporary unit is necessary when:

• Overall clearing of meter;

• Clearing maximum demand upon communication command;

• Clearing maximum demand manually through button;

• Change of power direction;

• Settlement among different months.

4. This meter is capable of various maximum demand calculation functions, including import/export active
demand and occurrence time, combined reactive and four-quadrant reactive maximum demand and occur­rence time, import/export apparent demand, maximum current demand of Phase A, Phase B and Phase C
and occurrence time.

5. Combined reactive maximum demand means the quadrant with maximum demand value among reactive
quadrant participating in combined computation. For example, value of reactive combined status character
2 is 05 H. Typical combined reactive 1 = 1st quadrant reactive + 2nd quadrant reactive. Assuming reactive
maximum demand of 1

st

quadrant in a demand interval is 100kvar and the same of 2nd quadrant is 200 kvar,

maximum demand value of combined reactive demand 1 within the same demand interval will be 200 kvar.

6. This meter is provided with two types of zero clearing for demand: clearing via communication and manual
clearing with button. For description of the latter, see subsequent content.

7. For time generating maximum demand, minute synchronization or clock synchronization is available. This is
controlled by parameter mode character 2. For mode character 2, see the table below. Such mode supports
parameter setting and alteration through communication.

Bit Function Bit Value vs Function Default

Bit 7 Reserved 0

Bit 6 Reserved 0

Bit 5 Demand synchronization mode

1: minute synchronization 0: clock syn-

chronization

1

Bit 4 Extreme value settlement 1: daily 0: monthly 0

Bit 3 Reserved 0

Bit 2 Reserved 0

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Bit Function Bit Value vs Function Default

Bit 1 Reserved 0

Bit 0 Reserved 0

3.4 Settlement

1. Settlement means the meter can save current electric energy and demand data at the settlement time preset.
It is also called cross month settlement.

2. Settlement day (automatic reading day) can be set through communication and any time within the 1
day can be set.

3. When crossing settlement day in case of power failure, cross month settlement will be applied depending on
number of months crossed. But, when more than 3 months, data of only 3 months will be settled.

4. The meter can save historical settlement data of previous 12 months. Historical settlement data include
electric energy data and demand data.

Functions

3.4 Settlement

st

to 28th

3.5 Time Division

1. The meter has a built-in high-precision real-time clock backed up by battery, carrying calendar and
supporting automatic switching for leap year.

2. 6 tariffs, 14 periods, 8 daily periods, 14 yearly time zones and 100 public holidays can be set maximally and
weekend period can be set. If tariff number of certain period is over number of tariffs (error), default tariff (tariff

1) will be used.

3. Electric energy and maximum demand data recorded by the meter include 6 tariffs, but time-shared data will
not be recorded for each phase (A, B and C).

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Functions

3.6 Event Record

3.6 Event Record

1. Instantaneous extreme value of power grid will be recorded. The meter can record maximum value and
minimum value of each phase voltage, line voltage, phase current, neutral current, active power, reactive
power and apparent power within cycle time. Cycle time can be "month" or "day" and is set through
parameter mode character 2. At most extreme values of three cycles can be saved.

2. Zero clearing, demand clearing and event clearing can be recorded. The meter records 10 latest zero clear­ing events.

3. Power failure event can be recorded. The meter records 10 latest power failure events, containing start time
and end time of power failure.

4. Timing event can be recorded. The meter records 10 latest timing events, containing pre-timing time and
post-timing time.

5. Voltage and current unbalance event can be recorded. The meter records 10 latest voltage unbalance events
and 10 latest current unbalance events. Decision limit and decision delay time of voltage and current unbal­ance events are set by parameter.

Voltage unbalance ratio = (3-phase voltage maximum difference / 3-phase voltage mean) x 100%, where 3-

phase voltage maximum difference is the largest difference between effective values of each phase voltage
(only Uab and Ubc for 3-phase-3-wire) and 3-phase voltage mean is the mean of effective values of 3-phase
voltage.

Current unbalance ratio = (3-phase current maximum difference / 3-phase current mean) x 100%, where 3-

phase current maximum difference is the largest difference between effective values of each phase current
(only Iab and Ibc for 3-phase-3-wire) and 3-phase current mean is the mean of effective values of 3-phase
current.

6. Statistic data of voltage eligibility rate can be recorded. The meter records statistic voltage eligibility of each
phase within recent 12 months. Upper and lower limits for voltage assessment are set by parameter. Statistic
data of voltage eligibility include voltage monitoring time, voltage limit violation time, voltage eligibility and
voltage limit violation rate.

7. Relay closing event can be recorded. The meter has 2 relay outputs. When manual control is set for relay,
the meter will record 10 latest manual closing records of relay output. Closing time and status will be record­ed.

8. SOE event can be recorded. The meter can record SOE events of 4 digital binary inputs and save 50 latest
records. Time of switch motion (exact to 1 msec), shift status and switch port number are recorded.

3.7 Freezing

1. Cyclic freezing: The meter can save data of 72 latest cyclic freezing actions. Start time and interval of freezing
are set with parameter. The content is import/export total active energy.

2. Daily freezing: The meter can save data of 8 latest daily freezing actions, including total active energy, total
reactive energy, four-quadrant reactive energy and total active maximum demand.

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3.8 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 at most 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.

2. At most 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)

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 phase apparent power

10 Phase B current 20 Active demand

11 Phase C current 21 Reactive demand

12 Neutral current 22 Apparent demand

Functions

3.8 Limit violation Alarm

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 limit violation; 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;

2 means alarm signal outputted from relay 2; 3 means alarm signal outputted from relay 1 and relay 2 at
the same time.

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".

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Functions

3.9 Display and Buttons

3.9 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.

3.10 Communication

RS485 port is provided for parameter setting and reading of various data. Two independent RS485
communication ports are default configuration.

3.11 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, demand clearing and modifying L4 password, not for meter reset,
event clearing, 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).

4. Broadcast timing is available only once each day and time for adjustment is no more than 5 min.

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3.12 Digital Input and Output Interface

Power Pulse Output

This meter provides two power pulse outputs: active and reactive, 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).

Functions

3.12 Digital Input and Output Interface

Figure 3-1 Circuit Diagram of Power Pulse Output Interface

Binary Input Interface

This product is provided with 4-digit binary inputs interface based on passive dry contact. Terminals are identi­fied as DI1, DI2, DI3, DI4 and COM. COM is the common terminal.

Figure 3-2 Circuit Diagram of Binary Input Interface

SICAM P38 P39, 3-phase Power Meter with Multi-Tariff function, User Manual
E50417-H8940-C564-4, Release Date 06.2018

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