Gossen MetraWatt A2000 Bedienungsanleitung

A2000

Multifunctional Power Meter 3-348-981-03

29/5.18

Operating Instructions

Contents Page

2GMC-I Messtechnik GmbH

1 Application ................................................................................................................................. 4

2 Instrument Description .............................................................................................................. 4

2.1 Instrument Overview .......................................................................................................................................4

2.2 Inputs, Outputs and Interfaces ..........................................................................................................................5

2.3 Available Measurement Data ...........................................................................................................................8

2.4 Possible A2000 Parameter Settings ...............................................................................................................10

2.5 Factory Default Instrument Parameters ...........................................................................................................12

3 Operating the A2000 ................................................................................................................ 13

3.1 Control Panel .................................................................................................................................................13

3.2 Response After Auxiliary Power is Switched On ................................................................................................13

3.3 Menu Display for Measurements in 4-Wire Systems .......................................................................................14

3.4 Menu Display for Measurements in 3-Wire Systems ........................................................................................16

3.5 Error Messages .............................................................................................................................................18

4 Configuring the A2000 ............................................................................................................. 19

4.1 Configuring the Limit Value Relays .................................................................................................................20

4.2 Adjustment of Display Brightness and Filter .....................................................................................................22

4.3 Measurement Inputs, Configuring the Synchronizing Input ...............................................................................24

4.4 Messeingänge, Analogeingänge konfigurieren (Feature A3) (nicht bei LON und Profibus-DP) .............................26

4.5 Configuring the Analog Outputs (not with Profibus-DP) .....................................................................................28

4.6 Configuring the S0 Pulse Outputs ..................................................................................................................29

4.7 Data Logger Display and Configuration ...........................................................................................................30

4.8 Configuring the Energy Meter Mode/Low Tariff ................................................................................................35

4.9 Interface Configuration ..................................................................................................................................36

4.10 Uploading and Deleting Parameters, Setting the Clock ....................................................................................38

5 Electrical Connections and Circuits ......................................................................................... 40

6 Interface Description ............................................................................................................... 44

6.1 General .........................................................................................................................................................45

6.2 Communications Protocol ...............................................................................................................................45

GMC-I Messtechnik GmbH 3

Contents Page

7 Dimensional Drawing ...............................................................................................................46

8 Technical Data ..........................................................................................................................47

9 Maintenance – Device Return and Environmentally Sound Disposal .......................................50

10 Repair and Replacement Parts Service

Calibration Center and Rental Instrument Service ...................................................................51

11 Product Support Industrial Division ...........................................................................................51

4GMC-I Messtechnik GmbH

1 Application

The A2000 measuring instrument is used for the analysis and monitoring of 3-phase current systems. It

can be operated with internal transformers in 3-phase current systems of up to 5 A and 500 V nominal

voltage, and can perform measurements in medium-voltage systems in combination with external cur-

rent and voltage transformers.

The A2000 acquires voltages, current, frequency and phase displacement in 3 and 4-wire systems. It

calculates active, reactive and apparent power, active and reactive energy, as well as the power factor

for the individual phases based upon these values.

An FFT (= Fast Fourier Transformation) is performedon the basis of the currents and phase voltages

and the harmonic waves are determined up to the 15th harmonic. For the phase voltages, the harmonic

distortions of the individual harmonics are indicated as well as the total harmonic distortion, for the cur-

rents, the respective RMS values are indicated.

Transformation ratios can be entered to the instrument, which means that all primary measurement data

can be displayed directly at the A2000. Maximum values are stored to memory for every measured or cal-

culated quantity. If limit values are exceeded, corrective action can be triggered via relay outputs. Energy

meters, recorders, data loggers and control loops can be connected to the digital and analog outputs. Via

the analog outputs 2 random measured quantities can be acquired by means of standard signal genera-

tor or temperatures via Pt1000 sensor. The instrument can be integrated into a field bus system or a LON

network with the communications interfaces, or its parameters can be configured with a PC.

2 Instrument Description

2.1 Instrument Overview

2 ea.

Limit Value Relays

Relay 1, Relay 2

4 ea.

Analog Outputs

A1, A2 (A3, A4 optional)

2 ea.

Pulse Outputs (optional)

S01, S02

S0 Standard

3 ea.

Voltage Inputs

3 ea.

Current Inputs

PC

RS-232

Field Bus



RS-485



(not used with LON)

LON

(optional)

Communication

Interfaces

A2000

Inputs Outputs

1 ea.

Synchronizing Input

Analog Inputs 

In1, In2 (optional)

GMC-I Messtechnik GmbH 5

2.2 Inputs, Outputs and Interfaces

Current Inputs

All current inputs are isolated from one another. If measurements are performed with external trans-

formers, their primary and secondary current values must be entered, in order to enable direct display

of current values. Switching between the two meas. ranges (1 A and 5 A) is accomplished via software.

Connection with 3 current transformers Connection with 2 current transformers

in 3/4-wire systems (4L) in 3-wire systems (3L)

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

13467 9 11258

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

13467 9 258

Connection with 1 current transformer Connection with 1 current transformer

in 4-wire systems (balanced load) (3L-1) in 3-wire systems (balanced load) (3L-1)

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

1 3 11 2

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

13 258

Connection with 1 current transformer

in 3-wire systems (balanced load)

(3L13)

Connection with 3 current transformers

in 4-wire systems (Open Y) (4L13)

For this connection type the accuracy

values for the measurement of power, energy

and power factor are only observed in the case

of low-distortion tension. The setting „Compen-

sating reactive power“ is not possible.

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

13 2 8

RELAY 1 RELAY 2 I3I2I1 L3L2L1N

Power

supply

13467 9 112 8

6GMC-I Messtechnik GmbH

Voltage Inputs

Each voltage measurement input is provided with a safety impedance (incl. the N conductor). Measure-

ments within 3-phase systems of up to 500 V are possible without the use of external transformers.

Mains Supply Power

Mains supply power must correspond to the specified values indicated on the serial plate. Correct con-

nection is absolutely essential!

Synchronizing Input

The synchronizing input is used to select the interval for calculation of the consumption value.

An external, potential-free contact must be used to drive this input. However, synchronization can also

be internally controlled with the software. Alternatively, a switch-over between low tariff and high tariff is

possible with the synchronizing input (see chapter 4.8 on page 35).

GMC-I Messtechnik GmbH 7

Relay Outputs

Limit values can be monitored for every measured or calculated quantity. These limit values can be

assigned to the relay outputs.

Pulse Outputs

External Voltage Source

S02

S01

e.g. Energy Import

e.g. Energy Export

Pulse Outputs:

The values for measured

reactive and active energy

can be read out at the

pulse outputs in the form of

standard S0 pulses for the

driving of electromechani-

cal counting mechanisms.

Analog Outputs

Each measured or calcu-

lated quantity can be

assigned to one of the ana-

log outputs. Exception:

FFT-values, which can only

be read out via the RS-232

and RS-488 interfaces.

This allows for the logging or driving of secondary control loops. The outputs can be configured as volt-

age or current outputs with the help of the DIP switches.

Analog Inputs

The 2 inputs can be configured separately via DIP switch for 10 V, 20 mA or Pt1000 signal. Adjusting

the possible signal input ranges as well as scaling and evaluation of measured values and the associ-

ated maximum values can be done via the operating panel and the RS232 and RS485 interfaces.

Communications Interfaces

The A2000 is provided with RS232 and RS485 interfaces as standard equipment. The RS485 interface

is not included with the LON model due to space limitations.

The RS232 interface allows for the transmission of measurement values from the A2000 to a PC, as well

as external instrument configuration. The chapter entitled “Interface Description” on page 44 provides

detailed information regarding the generation of user specific programs. The RS485 field bus interface

allows for the interconnection of up to 32 instruments.

8GMC-I Messtechnik GmbH

2.3 Available Measurement Data

Individual Phases Collective Values

Phase Voltages U1 ... U3 U1 max ... U3 max U 4) U max 5)

Delta Voltages U12, U23, U31 U12 max ... U31 max Uavg 4) Uavg max 5)

Phase Current I1 ... I3 I1 max ... I3 max I 4) I max 5)

Averaged Phase Current I1 avg ... I3 avg I1 avg max ... I3 avg max Iavg 4) Iavg max 5)

Neutral Conductor current

In Inmax — —

Averaged Neutral



Conductor Current

Inavg Inavgmax — —

Line Frequency — — f —

Active Power P1 ... P3 P1 max ... P3 max P P max

Reactive Power Q1 ... Q3 Q1 max ... Q3 max Q Q max

Apparent Power S1 ... S3 S1 max ... S3 max S S max

Power Factors PF1 ... PF3 PF1 min ... PF3 min PF PF min

Energy Mode L123 1) LT H T 2) L123 1) LT H T 2) L123 1) LT H T 2) L123 1) LT H T 2)

Active Energy EP1 ... E P3 – – – E P EP L – , EP L + 

EP H – , EP H + 3) – –

Reactive Energy EQ1 ... E Q3 – – – E Q EQ L – , EQ L + 

EQ H – , EQ H + 3) – –

Intervalic Active Energy – – P int Pint max

Interv. Reactive Energy – – Q int Qint max

Interv. Apparent Energy – – S int Sint max

THD, 1st... 15th harmon. U1h ... U3h,

I1h ... I3h

U1hmax ... U3hmax,

I1hmax ... I3hmax

– –

In1, In2 Measured

Value 1, 2 6) Max. Meas.

Value 1, 2 6) — —

1) L123 = individual phases L1, L2, L3

2) LTHT = low tariff (LT) high tariff (HT)

3) L = low tariff, H = high tariff, + = import, – = export

4) only via interface and as a source for relay and analog output

5) only via interface

6) Value range depends on configuration

• The determination of measured and calculated quantities is performed in accordance with DIN

40110 part 1,2 4.96 (non-sinusoidal quantities).

• PEN conductor current is not taken into consideration for the calculation of collective phase current

and collective apparent power.

• The averaging of currents I1avg I3avg , Inavg is performed in the same manner as with a bimetallic

indicator, with a setting time of approx. 10 min relative to 99% of the final value.

GMC-I Messtechnik GmbH 9

Display of Reactive Power

DIN = calculation of reactive power per Sign = calculation of reactive power with + or–

DIN 40110 without + or – sign

1. Q

4. Q3. Q

P = –

Q = +

P = +

Q = +

P = –

Q = +

P = +

Q = +

EP–

EQ–

EP–

EQ–

EP+

EQ+

EP+

EQ+

PF = cap PF = ind

PF = capPF = ind

2. Q

QS2P2

–=

1. Q

4. Q3. Q

P = –

Q = +

P = +

Q = +

P = –

Q = –

P = +

Q = –

EP–

EQ+

EP–

EQ–

EP+

EQ+

EP+

EQ–

PF = ind PF = ind

PF = capPF = cap

2. Q

-------u

t it TN

-------

–





=

Comp = com

pensating reactive power



(reactive power is only produced if current



and voltage have different + or - signs)

1. Q

4. Q3. Q

P = –

Q = 0

P = +

Q = +

P = –

Q = 0

P = +

Q = –

EP–

EQ+

EP–

EQ–

EP+

EQ+

EP+

EQ–

PF = 1.0 PF = ind

PF = capPF = 1.0

2. Q

-------

–u

t itdt=

for u(t) · i(t) < 0

Calculation of Collective Values

Uavg U12 U23 U31

++3=

UU1

2U2

2U3

++=

II1

2I2

2I3

++=

(without IN)

SUI

=

PP1P2P3

++=

QS

2P

–=

(per DIN)

QQ1Q2Q3

++=

(others)

PFPS

=

10 GMC-I Messtechnik GmbH

2.4 Possible A2000 Parameter Settings

Inputs

4 or 3-Wire

Connection

Primary Transformer

Phase Conductor

Secondary Trans-

former Phase Conduc-

tor

Transformer 

Primary Current

Transformer 

Secondary Current

Synchronization Pulse

100 V ... 800 kV 100 V ... 500 V 1 A ... 150 kA 1 A, 5 A external or internal: 

1 ... 60 minutes

Relay 1, 2

Max, Min

Source Limit Value Hysteresis Delay Alarm Memory

1) 4) 2) 0 ... 9999 Digit 0 ... 30 min off, on

Analog Outputs

1 ... 4

Source Output Start Source End Source

1) 3) 0 ... 20 mA

4 ... 20 mA

–20 ... +20 mA

–10 ... +10 mA

2) 2)

Analog Inputs

In1, In2

Source Range of Source Scale Range Position 

of Decimal Point

Lower Limit Upper Limit

Standard Signal 0 ... 20 mA/0 ... 10 V

4 ... 20 mA/2 ... 10 V

–20...+20 mA/0...10 V

–10...+10 mA/–5...+5 V

–1999 ... +9999 –1999 ... +9999 1999,

199.9

19.99

1.999

Pt1000 185.6 ... 3933 –200 °C / –328 °F

–199.9 °C/°F

860 °C / 1580 °F

859.9 °C / 999.9 °F

199

199.9

Offset –100 °C/°F +100 °C/°F 99 / 99.9

Pulse Outputs

S01, S02

Source Energy Type Energy Direction Pulse Rate Tariff

L1, L2, L3, Active, Reactive Energy Import, Export 1... 5000 

pulses/kWh (MWh)

1... 5000 

pulses/kVArh (MVArh)

High, low tariff

Display Brightness 0 ... 7 Filter 0 ... 30 s

Interfaces

RS-232, RS-485

Address Baud Rate Parity Protocol

0 ... 254 1200, 2400, 4800, 9600, 19200 Even, odd, space, no E244, 870, Mod1,

Mod2

Energy Meter Mode Swith-over high/low tariff

L123 / LTHT 5) Clock / Synchr. input

Reactive Power per DIN / with +/- sign / for Compensation

1) Possible sources (see below)

2) Limits are dependent upon the selected transformation ratio at the voltage or current transformer

3) Interval –1 applies to Pint, Qint or Sint (for recording max. values)

4) Interval 0 applies to P

int, Qint or Sint (current shutdown interval for shutdown options)

5) L123 = individual phases L1, L2, L3; LTHT = low tariff high tariff

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