Bender PEM735 User manual

Quick start guide

Power quality analyser

This reference guide does not replace the operating manual!

The manual is available on our Web site www.bender.de

Make sure that the relevant personnel has read this manual and

understood all instructions relating to safety.

1. Safety instructions 2. Intended use

The PEM735 is suitable for

Analysing energy and power

Monitoring the supply voltage quality (Power Quality) in

accordance with DIN EN 50160

Recording relevant energy management data (Energy Man-

agement)

As a compact device for front panel mounting, it can replace ana-

logue indicating instruments. The PEM735 is suitable for 3 and 4-

wire systems and can be used in TN, TT and IT systems. The current

measurement inputs of the PEM are connected via external …/1 A

or …/5 A measuring current transformers. In principle, measure-

ments in medium- and high-voltage systems are carried out via

measurement transformers and voltage transformers. The accuracy

of the active energy metering corresponds to class 0.2 S, which is in

compliance with the DIN EN 62053-22 (VDE 0418 Part 3-22):2003-

11.

3. Scope of delivery

1 PEM735

Safety instructions

Quick start guide

1 Sealing frame with protection level IP54

4. Installing the device

Front-panel mounting (front view, side view, panel cutout)

A front-panel cutout of 138 mm x 138 mm is required for the device.

1. Insert the device through the cutout in the front panel.

2. Insert the two installation clips into the equipment rail from behind.

3. Push the clips towards the front panel and tighten the associated screws by hand.

4. Check the device to ensure that it is firmly installed in the front panel.

Danger of electric shock!

Follow the basic safety rules when working with electricity.

Consider the data on the rated voltage and supply voltage

as specified in the technical data!

DANGER

144

145

125

144

138

16 109

138

144

164

138

PEM735

PEM735_D00084_01_Q_XXEN/06.2020

2PEM735_D00084_01_Q_XXEN/06.2020

PEM735

5. Connecting the PEM735

Wiring diagram Wiring diagram legend

Connection

1. Connect the device according the wiring diagram. The con-

nections are located on the back of the device. Connect the

PEM735 to the supply voltage (terminals A1/+, A2/-. Connect

terminal " " to the protective conductor.

2. Line protection: A 6 A fuse is recommended for both lines if

being from an IT system.

3. Connection to the RS-485 bus is made via terminals D+, D- and

SH. Up to 32 devices can be connected to the bus. The maxi-

mum cable length for the bus connection of all devices is

1200 m.

6. Connecting the voltage inputs

•l41

•l31

•l11

•l21

l42

I32

I12

l22

D+

P2(RS-485)

D-

D+

D-

P1(RS-485)

DI8

DI7

DI6

DI5

DI4

DI3

DI2

DI1

DIC

Power

A2/-

A1/+

RO23

RO43

RO24

RO33

RO34

RO44

RO14

RO13

DO1-

DO1+

DO2-

DO2+

Act Link

10/100M

Ethernet

LED

D+

P2(RS-485)

D-

D+

D-

P1(RS-485)

10/100M

Ethernet

DI1

DI5 DI6DI2 DI3 DI4 DI7 DI8 DIC

I11

I12

I21

I22

I31

I32

I41

I42

L1 L2 L3 N

DO1+ DO1-

DO2+ DO2-

RO13 RO14

RO23 RO24

RO33 RO34

RO43 RO44

Terminal Description

A1, A2,

Connection to supply voltage, 6 A fuse (when sup-

plied by IT systems, both phase conductors have to

be protected).

DI1…DI6, DIC Digital inputs (24 V)

DO1+, DO1-,

DO2+, DO2- Digital outputs (N/O contacts, 30 V; 50 mA)

RO13/RO14,

RO23/RO24,

RO33/RO34

RO43/RO44

Relay outputs (250 V; 3 A)

I11, I12,

I21, I22,

I31, I32

Connection to the system to be monitored:

The measuring leads should be protected

with appropriate fuses (6 A).

D+, D-, SH RS-485 bus connection

L1, L2, L3, L4, N Measuring voltage inputs: The measuring leads

should be protected with appropriate fuses.

Modbus TCP: Pin assignment

1 Transmit Data +

2 Transmit Data –

3 Receive Data +

4, 5, 7, 8 not used

6 Receive Data –

12345678

Three-phase 4-wire system

(TN, TT, IT system) Three-phase 3-wire system Connection via voltage transformers

The PEM can be used in three-phase 4-wire

systems, independent of the type of distri-

bution system (TN, TT, IT system).

The PEM can be used in three-phase 3-wire

systems.

The measuring device can be used in medi-

um- and high-voltage systems if coupled via

voltage transformers.

The transmission ratio can be adjusted in

the PEM735 (primary and secondary side

separately).

L1 L2 L3 N

PEM

AC 400/230 V

AC 690/400 V

L1 L2 L3

PEM

AC 400 V

L1 L2 L3

PEM

AC 690 V

L1 L2 L3 N

PEM

LV / MV / HV

PEM735_D00084_01_Q_XXEN/06.2020

PEM735

7. Commissioning the device 8. Start

Check for proper connection

Observe the relevant standards and regulations for installation and

connection as well as the operating manual of the respective de-

vice.

Before switching on:

consider the following:

1. Does the connected supply voltage correspond to the infor-

mation on the nameplate?

2. Are you sure that the nominal insulation voltage of the meas-

uring current transformer has not been exceeded?

3. Does the measuring current transformer's maximum current

correspond to the nameplate information of the connected

device?

After switching on:

proceed as follows:

1. Connect the supply voltage.

2. Set the bus address/IP address.

3. Select wye or delta connection.

4. Set the CT transformation ratio (for each channel).

5. Change the measuring current transformer's counting direc-

tion, if required.

6. Set the nominal voltage (line-to-line voltage ULL, secondary

voltage for voltage transformers)

Basic parameters, interfaces or calculation types can be specified in

the "Settings" menu.

The following diagram will help you to familiarise yourself with the

menu:

9. Display and operating controls

Display and operating control legend

A correct password must be entered before parameter

changes are allowed. (factory setting: 0000)

Current

Power Quality >

Voltage

Waveform

Harmonics

Phasor Diagram

Flicker

EN50160 >

U Sum, I Sum, L1, L2, L3

U1, U2, U3, U4, I1, I2, I3, I4

ULn, ULL

I1, I2, I3, I4, Iavg

ENTER

Device buttons

Main Menu

Power & Energy

System

Energy, Sum, L1, L2, L3

DI1...8, DO1...2, RO1...4

SOE

PQLog

Settings > Info

Basic

Ethernet

COM

Advanced

Time

Events >

ENTER

Metering U, I, RMS, Fundamental

ENTER

Others

LEDs kWh, kvarh

Button

sENTER ESC

Back;

Submenu: scroll;

Selection left side

Main menu: move

upwards in the menu;

Increase number/selec-

tion

Main menu: move down

in the menu;

Decrease number/

selection

Select menu item;

Submenu: scroll;

Selection right side

Ok;

Enter submenu;

"Freeze" waveform

recorder; depending on

the submenu further

function (see display)

Leave submenu item;

"Unfreeze" waveform

recorder"; depending

on the submenu further

function (see display)

4PEM735_D00084_01_Q_XXEN/06.2020

PEM735

publisher. Subject to change!

Photos: Bender archives.

E-Mail: [email protected]

www.bender.de

Bender GmbH & Co. KG

Londorfer Str. 65 • 35305 Grünberg • Germany

PO Box 1161 • 35301 Grünberg • Germany

Tel.: +49 6401 807-0

Fax: +49 6401 807-259

10. Data display via buttons 11. Data display via communication inter-

face/Web interface

The evaluation of a number of measured values can be accessed

directly on the device using the device buttons, without having to

use the communications interface. Thus it is possible to show the

phasor diagram, reports, flicker, currents and voltages, current

waveforms, harmonics, … directly on the display.

All measuring values can be obtained via the communications

interface. Details concerning the Modbus register assignment can

be found in the operating manual.

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