Bender PEM735 User manual

PEM735
PEM735_D00084_02_M_XXEN/06.2020
Power quality analyser
Software version 2.00.xx
Manual EN

©Bender GmbH & Co. KG
All rights reserved.
Reprinting only with permission
of the publisher.
Subject to change!
Bender GmbH & Co. KG
PO Box 1161 • 35301 Grünberg • Germany
Londorfer Str. 65 • 35305 Grünberg • Germany
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
www.bender.de
Photos: Bender Archive

3
Table of Contents
PEM735_D00084_02_M_XXEN/06.2020
1. Important information ........................................................................... 7
1.1 How to use this manual ................................................................................... 7
1.2 Technical support: Service and support .................................................... 8
1.2.1 First level support .............................................................................................. 8
1.2.2 Repair service ...................................................................................................... 8
1.2.3 Field service ......................................................................................................... 8
1.3 Seminars ............................................................................................................... 9
1.4 Delivery conditions ........................................................................................... 9
1.5 Inspection, transport and storage ............................................................... 9
1.6 Warranty and liability ....................................................................................... 9
1.7 Disposal ............................................................................................................... 10
2. Safety instructions ............................................................................... 11
2.1 General safety instructions .......................................................................... 11
2.2 Work activities on electrical installations ................................................ 11
2.3 Intended use ..................................................................................................... 12
3. Device description ............................................................................... 13
3.1 Area of application .......................................................................................... 13
3.2 Device features ................................................................................................. 13
3.3 Versions ............................................................................................................... 15
3.4 Application example ..................................................................................... 16
3.5 Functional description ................................................................................... 17
4. Mounting and connection .................................................................. 19
4.1 Project planning .............................................................................................. 19
4.2 Safety instructions ........................................................................................... 19
4.3 Mounting the device ...................................................................................... 20
4.3.1 Dimension diagrams ...................................................................................... 20

Table of Contents
4PEM735_D00084_02_M_XXEN/06.2020
4.3.2 Front panel mounting ................................................................................... 21
4.4 Connection of the device ............................................................................. 22
4.4.1 Safety instructions........................................................................................... 22
4.4.2 Back-up fuses .................................................................................................... 22
4.4.3 Connection of measuring current transformers .................................. 22
4.5 Connection details .......................................................................................... 22
4.6 Wiring diagram ................................................................................................. 23
4.7 Connection diagram voltage inputs ......................................................... 24
4.7.1 Three-phase 4-wire system (TN, TT, IT system) ..................................... 24
4.7.2 Three-phase 3-wire system .......................................................................... 25
4.7.3 Connection via voltage transformers ....................................................... 26
4.8 Digital inputs ..................................................................................................... 26
4.9 Digital outputs DO1…2 ................................................................................ 27
4.10 Relay outputs RO1…4 ................................................................................... 28
4.11 Modbus TCP (connector pin assignment) .............................................. 28
5. Commissioning and operation ........................................................... 29
5.1 Getting to know the operating elements .............................................. 29
5.2 LED display (Energy pulsing) ....................................................................... 30
5.3 Check proper connection ............................................................................. 30
5.4 Before switching on ........................................................................................ 30
5.5 Switching on ..................................................................................................... 31
5.6 System ................................................................................................................. 32
5.7 Overview diagram ........................................................................................... 33
6. Power Quality ........................................................................................ 35
6.1 Phasor diagram ................................................................................................ 36
6.2 Flicker ................................................................................................................... 37
6.3 Report EN 50160 .............................................................................................. 38
6.3.1 Power frequency .............................................................................................. 40
6.3.2 Supply voltage variations ............................................................................. 42
6.3.3 Rapid voltage changes .................................................................................. 44
6.3.4 Flicker severity .................................................................................................. 46
6.3.5 Voltage unbalance .......................................................................................... 49

Table of Contents
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PEM735_D00084_02_M_XXEN/06.2020
6.3.6 Harmonic voltages .......................................................................................... 51
6.3.7 Interharmonic voltages ................................................................................. 54
6.3.8 Mains signalling (ripple control signals) ................................................. 56
6.3.9 Voltage swells ................................................................................................... 58
6.3.10 Voltage sags ...................................................................................................... 59
6.3.11 Voltage interruptions ..................................................................................... 61
6.3.12 Transient overvoltages .................................................................................. 63
7. Voltage ................................................................................................... 65
8. Current ................................................................................................... 67
9. Waveform .............................................................................................. 69
10. Harmonics ........................................................................................... 73
11. Metering .............................................................................................. 77
12. Power & Energy .................................................................................. 81
13. System .................................................................................................. 83
14. Events ................................................................................................... 85
15. Settings ................................................................................................ 87
15.1 Info ........................................................................................................................87
15.2 Basic ...................................................................................................................... 88
15.2.1 Ethernet .............................................................................................................. 90
15.2.2 COM (communication interface) ............................................................... 92
15.2.3 Advanced ........................................................................................................... 93
15.2.4 Time (setting date and time) ....................................................................... 95
15.2.5 Others .................................................................................................................. 96
16. Other ..................................................................................................... 99
16.1 Resetting to factory settings ....................................................................... 99
16.2 Creating display screenshots ...................................................................... 99
16.3 Data export via FTP ...................................................................................... 100

Table of Contents
6PEM735_D00084_02_M_XXEN/06.2020
17. Technical data .................................................................................. 101
17.1 Standards and certifications ..................................................................... 104
17.2 Ordering information .................................................................................. 104
17.2.1 PEM .................................................................................................................... 104
17.2.2 Measuring current transformers ............................................................. 105
18. Glossary and terms .......................................................................... 107
INDEX ......................................................................................................... 113

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PEM735_D00084_02_M_XXEN/06.2020
1. Important information
1.1 How to use this manual
Always keep this manual within easy reach for future reference.
To make it easier for you to understand and revisit certain sections in this manual, we
have used symbols to identify important instructions and information.
The meaning of these symbols is explained below:
Although great care has been taken in the drafting of this operating manual, it may nev-
ertheless contain errors and mistakes. Bender cannot accept any liability for injury to
persons or damage to property resulting from errors or mistakes in this manual.
This manual is intended for qualified personnel working in electrical
engineering and electronics!
The signal word indicates that there is a high risk of danger,, that will result
in death or serious injury if not avoided.
This signal word indicates a medium risk of danger that can lead to
death or serious injury if not avoided.
This signal word indicates a low level risk that can result in minor or
moderate injury or damage to property if not avoided.
This symbol denotes information intended to assist the user in making
optimum use of the product.
DANGER
WARNING
CAUTION

Important information
8PEM735_D00084_02_M_XXEN/06.2020
1.2 Technical support: Service and support
For commissioning and troubleshooting Bender offers you:
1.2.1 First level support
Technical support by phone or e-mail for all Bender products:
 Question about specific customer applications
 Commissioning
 Troubleshooting
Telephone [phone]*
Fax: [phone]
In Germany only: 0700BenderHelp (Tel. and Fax)
E-mail: [email protected]
1.2.2 Repair service
Repair, calibration, update and replacement service for Bender products
 Repair, calibration, testing and analysing Bender products
 Hardware and software update for Bender devices.
 Delivery of replacement devices for faulty or incorrectly delivered Bender devices.
 Extended warranty for Bender devices with in-house repair service resp. replace-
ment devices at no extra cost.
Telephone [phone]** (technical issues)
[phone]**, -785** (commercial matters)
Fax: [phone]
E-mail: [email protected]
Please send the devices for repair to the following address:
Bender GmbH, Repair-Service,
Londorfer Straße 65,
35305 Grünberg
1.2.3 Field service
On-site service for all Bender products:
 Commissioning, parameter setting, maintenance, troubleshooting for Bender
products
 Analysis of the electrical installation in the building (power quality test, EMC test,
thermography).
 Practical training courses for customers.

Important information
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PEM735_D00084_02_M_XXEN/06.2020
Telephone [phone]**, -762 **(technical issues)
[phone]** (commercial issues)
Fax: [phone]
E-mail: [email protected]
Internet: www.bender.de
*Available from 7.00 a.m. to 8.00 p.m. on 365 days of the year (CET/UTC+1)
**Mo-Thu 7.00 a.m. - 8.00 p.m., Fr 7.00 a.m. - 13.00 p.m
1.3 Seminars
Bender is happy to provide training regarding the use of test equipment.
The dates of training courses and workshops can be found on the Internet at
www.bender.de -> Know-how -> Seminars.
1.4 Delivery conditions
The conditions of sale and delivery set out by Bender apply.
For software products the "Softwareklausel zur Überlassung von Standard-Software als
Teil von Lieferungen, Ergänzung und Änderung der Allgemeinen Lieferbedingungen
für Erzeugnisse und Leistungen der Elektroindustrie" ( software clause in respect of the
licensing of standard software as part of deliveries, modifications and changes to gen-
eral delivery conditions for products and services in the electrical industry) set out by
the ZVEI (Zentralverband Elektrotechnik- und Elektronikindustrie e. V.) (German Electri-
cal and Electronic Manufacturer's Association) also applies.
Conditions of sale and delivery can be obtained from Bender in printed or electronic for-
mat.
1.5 Inspection, transport and storage
Inspect the dispatch and equipment packaging for damage, and compare the contents
of the package with the delivery documents. In the event of damage in transit, please
contact Bender immediately.
The devices must only be stored in areas where they are protected from dust, damp,
and spray and dripping water, and in which the specified storage temperatures can be
ensured.
1.6 Warranty and liability
Warranty and liability claims in the event of injury to persons or damage to property are
excluded if they can be attributed to one or more of the following causes:
 Improper use of the device.

Important information
10 PEM735_D00084_02_M_XXEN/06.2020
 Incorrect mounting, commissioning, operation and maintenance of the device.
 Failure to observe the instructions in this operating manual regarding transport,
commissioning, operation and maintenance of the device.
 Unauthorised changes to the device made by parties other than the manufac-
turer.
 Non-observance of technical data.
 Repairs carried out incorrectly and the use of replacement parts or accessories not
approved by the manufacturer.
 Catastrophes caused by external influences and force majeure.
 Mounting and installation with device combinations not recommended by the
manufacturer.
This operating manual, especially the safety instructions, must be observed by all per-
sonnel working on the device. Furthermore, the rules and regulations that apply for ac-
cident prevention at the place of use must be observed.
1.7 Disposal
Abide by the national regulations and laws governing the disposal of this device. Ask
your supplier if you are not sure how to dispose of the old equipment.
The directive on waste electrical and electronic equipment (WEEE directive) and the di-
rective on the restriction of certain hazardous substances in electrical and electronic
equipment (RoHS directive) apply in the European Community. In Germany, these pol-
icies are implemented through the "Electrical and Electronic Equipment Act" (ElektroG).
According to this, the following applies:
 Electrical and electronic equipment are not part of household waste.
 Batteries and accumulators are not part of household waste and must be dis-
posed of in accordance with the regulations.
 Old electrical and electronic equipment from users other than private households
which was introduced to the market after 13 August 2005 must be taken back by
the manufacturer and disposed of properly.
For more information on the disposal of Bender devices, refer to our homepage at
www.bender.de -> Service & support.

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PEM735_D00084_02_M_XXEN/06.2020
2. Safety instructions
2.1 General safety instructions
Part of the device documentation in addition to this manual is the enclosed " Safety in-
structions for Bender products".
2.2 Work activities on electrical installations
If the device is being used in a location outside the Federal Republic of Germany, the
applicable local standards and regulations must be complied with. European standard
EN 50110 can be used as a guide.
Only qualified personnel are permitted to carry out the work necessary to
install, commission and run a device or system.
Danger of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An electric shock
 Damage to the electrical installation
 Destruction of the device
Before installing and connecting the device, make sure that the
installation has been de-energised. Observe the rules for working on
electrical installations.
Refer to the rated and supply voltage values as specified in the
technical data!
DANGER

Safety instructions
12 PEM735_D00084_02_M_XXEN/06.2020
2.3 Intended use
The PEM735 power quality analyser is intended for
 analysing energy and power (Power Analyser)
 monitoring the power supply quality (Power Quality)
 recording relevant data for energy management (Energy Management).
As a compact device for front panel mounting it is suitable for replacing analogue indi-
cating instruments. The PEM735 can be used in three-phase 4-wire systems, three-
phase 3-wire systems and in TN, TT and IT systems (see "Connection diagram voltage in-
puts" on page 24 ff). The current measurement inputs of the PEM are connected via ex-
ternal …/1 A or …/5 A measuring current transformers. In principle, measurements in
medium and high-voltage systems are carried out via measuring current and voltage
transformers.
Use for the intended purpose includes:
 Device-specific settings according to the installation and operating conditions on
site.
 The observation of all information in the operating manual.
Any other use than that described in this manual is regarded as improper.
Although great care has been taken in the drafting of this operating manual, it may nev-
ertheless contain errors and mistakes. Bender cannot accept any liability for injury to
persons or damage to property resulting from errors or mistakes in this operating man-
ual.

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PEM735_D00084_02_M_XXEN/06.2020
3. Device description
3.1 Area of application
For humans, electric current is not immediately visible. Power quality analysers for mon-
itoring electrical parameters are used wherever energy consumption, power demand
measurements or the quality of the supply voltage are to be made visible.
The PEM735 is suitable for monitoring
 Power generation systems (PV systems, CHPs, hydro power and wind power
plants)
 Energy-intensive equipment and parts of installation
 Sensitive equipment
3.2 Device features
The PEM735 power quality analyser for power quality and energy management is char-
acterised by the following features:
 Class A power analyser, certified according to DIN EN 61000-4-30:2008
 Monitoring of the power quality in accordance with EN 50160
 Accuracy class according to IEC 62053-22: 0.2 S
 TFT colour display (640 x 480) 5.7“
 Modbus RTU and Modbus TCP
 Memory: 2 GB (1 GB for data recording)
 Panel mounting 138x138
 Integrated web server
 Flicker measurement
 Detection and recording of transient events (40 μs)
 Sampling rate: 512 samples/cycle
 Freely configurable recorders for waveform, consumption and long-term record-
ing
 Sampling rate of the measuring channels: 25.6 kHz
 Calculation of the total harmonic distortion THDU/THDI:
harmonics up to the order 63
 Individual current/voltage harmonics
 Password protection

Device description
14 PEM735_D00084_02_M_XXEN/06.2020
 History memory for minimum and maximum values of current, voltage, energy,
power etc. for each month.
 Inputs and outputs:
– 2 digital outputs,
– 4 relay outputs,
– 8 digital inputs (sampling: 1 kHz)
– 2 LED pulse outputs for active and reactive energy
 Setpoints: 32 configurable setpoints (24 standard, 8 highspeed)
 System protocol:
– 1024 entries
– Setup changes
– Setpoints
– DI status changes
– DO switching operations
 Communication:
– Galvanically separated RS-485 interface (1,200 to 38,400 bit/s)
– Modbus RTU protocol
– Modbus TCP (100 Mbit/s)
Measurements at a glance
 Measured quantities
– Phase voltages UL1, UL2, UL3 in V
– Line-to-line voltage UL1L2, UL2L3, UL3L1 in V
– U4 in V
– Phase currents I1, I2, I3in A
– Neutral current (calculated) I0in A
– Neutral current (calculated) I4in A
– Frequency fin Hz
– Phase angle for Uand I in °
– Power per phase conductor Pin kW, Qin kvar, S in kVA
– Total power Pin kW, Qin kvar, S in kVA
– Displacement factor cos φ
– Power factor λ
– Active and reactive energy import in kWh, kvarh
– Active and reactive energy export in kWh, kvarh
– Voltage unbalance in %
– Current unbalance in %

Device description
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PEM735_D00084_02_M_XXEN/06.2020
– Harmonic distortion
(THD, TOHD, TEHD) for Uand I
– k-factor for I
– Minimum and maximum values for U, I, r.m.s., fundamental component
 Measured quantities PQ
– k-factor for I
– THD, TOHD and TEHD for Uand I
– Harmonic analysis for P, Q and S for harmonics of the order 2…63
– Fundamental component for U, I, P, Q, S and λ
– Fundamental component for active and reactive energy (import and export)
– Total harmonics for active energy
– Individual harmonics 2…31 for active energy import
 Report in accordance with EN 50160
– Power frequency
– Supply voltage variations
– Rapid voltage changes
– Flicker severity
– Voltage unbalance
– Harmonic voltage up to the order 25 in % or RMS value
– Interharmonic voltage for harmonics up to the order 25 in % or RMS value
– THDU up to the order 40
– Mains signalling
– Voltage swells
– Voltage sags
– Interruptions
– Transient overvoltages
3.3 Versions
PEM735 100/690 V, 50 Hz; Current input 5 A
PEM735 100/690 V, 60 Hz; Current input 5 A

Device description
16 PEM735_D00084_02_M_XXEN/06.2020
3.4 Application example
Fig. 3.1: Application example
Modbus TCP
Ethernet
BMS 1…12
Modbus
RTU
Datenbank
L
PEN
PE
L
N
PE
U
I
Modbus TCP
Modbus RTU
PAS
PEM7xx
U
I
NSHV
UV1
1…12
RCMS
UV2
U
I
U
I
U
I
RCMS
Modbus TCP
Modbus RTU
Modbus TCP
PEM5xx PEM5xx
Modbus RTU
PEM3xx
PEM7xx
CP700
3
U
I
Modbus RTU
PEM3xx
3

Device description
17
PEM735_D00084_02_M_XXEN/06.2020
3.5 Functional description
The PEM735 power quality analyser is suited for measuring and displaying electrical
quantities of electricity networks. The PEM735 can measure currents, voltages, energy
consumption and power as well as represent individual harmonic components of cur-
rent and voltage for the assessment of voltage and current quality according to EN
50160.
The accuracy of the active energy metering corresponds to class 0.2 S, which is in com-
pliance with the DIN EN 62053-22 (VDE 0418 Part 3-22):2003-11.
The current inputs are connected via external …/1 A or …/5 A measuring current trans-
formers.
The large display of the panel mounting device makes the relevant measured quantities
easily legible and enables fast configuration. In addition, the interfaces (RS-485 and
Ethernet) allow central evaluation and processing of data. Switching operations can be
monitored or initiated via the digital inputs and outputs (Example: switching off uncriti-
cal loads if the peak load threshold value is exceeded).
The PEM735 provides the following functions:
 Provision of energy consumption data for a well thought-out energy manage-
ment
 Power quality monitoring for cost reduction and increased plant availability
 High resolution waveform recording allows analysis of power quality phenomena

Device description
18 PEM735_D00084_02_M_XXEN/06.2020

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PEM735_D00084_02_M_XXEN/06.2020
4. Mounting and connection
4.1 Project planning
For any questions associated with project planning, please contact Bender:
Internet: www.bender.de
Telephone: [phone]
4.2 Safety instructions
Only qualified personnel are permitted to carry out the work necessary to
install, commission and run a device or system.
Danger of electrocution due to electric shock!
Touching live parts of the system carries the risk of:
 An electric shock
 Damage to the electrical installation
 Destruction of the device
Before installing and connecting the device, make sure that the
installation has been de-energised. Observe the rules for working on
electrical installations.
Refer to the rated and supply voltage values as specified in the
technical data!
DANGER

Mounting and connection
20 PEM735_D00084_02_M_XXEN/06.2020
4.3 Mounting the device
4.3.1 Dimension diagrams
Fig. 4.1: Dimension diagram PEM735 (front view)
Fig. 4.2: Dimension diagram PEM735 (side view)
144
145
125
144
136
136
16 109
136
20
144
164