Gossen MetraWatt U1281 Bedienungsanleitung

Operating Instructions

Electronic Active Energy Meters

U1281/U1289/U1381/U1387/U1389 3-349-275-15

9/7.06

MAIN PISTRIBUTION – PRODUCTION

1 Safety Precautions – Symbols ...........................2

2 Serial Plate – Terminals ....................................4

3 Pulse Output – Bus Interfaces ............................6

4 Display and Control Panel ..................................7

5 Error Messages – Reset ...................................14

6 Meter calibration – Maintenance .....................15

7 Product Support ...............................................15

8 Repair and Replacement Parts Service ............16

Chapter PageContents

2 GMC-I Gossen-Metrawatt GmbH

1 Safety Precautions – Symbols

– Check the specified nominal voltage on the serial plate

before placing the instrument into service.

– Observe the maximum voltage of the pulse output.

– Make sure the connector cables are not damaged, and

that they are voltage-free while wiring the instrument.

– If it can be assumed that safe operation is no longer pos-

sible, the instrument must be immediately removed from

service (disconnect input voltage!). Safe operation can no

longer be relied upon if the instrument demonstrates visi-

ble damage.

The device may not be placed back into operation until

troubleshooting and repair have been performed, and

calibration and dielectric strength have been tested and

approved at our factory or an authorized service center.

– Voltage conducting parts may be exposed if the cover is

opened.

If balancing, maintenance or repair of a live open instru-

ment is required, work may only be carried out by trained

personnel who are familiar with the dangers involved.

Capacitors inside the instrument may be dangerously

charged, even after it has been disconnected from all

power sources.

– After the instrument has once again been closed subse-

quent to repair or maintenance work, insulation must be

tested with high-voltage in accordance with the values

specified in the technical data.

GMC-I Gossen-Metrawatt GmbH 3

Meaning of Symbols on the Instrument

Label with seal from federally

approved test authority

Warning concerning a source of danger

(Attention, observe documentation!)

Total insulation,

Safety Class II device

Indicates EC conformity

Symbol for type approval

This device may not be disposed of with the trash.

Further information regarding the WEEE mark can

be accessed on the Internet at www.gossenmetra-

watt.com by entering the search term ’WEEE’.

Circuit Symbols:

4-wire circuit 3-wire circuit

2-wire circuit

For symbols on the LCD see chapter 4.3.

Tamper-proof sealing of terminal cover

Tamper-proof sealing for the terminal cover is attached

either at the left or right-hand side of the terminal cover.

Tamper-proof Sealing of Housing

Drill holes are provided at the rear housing panel for tamper-

proof sealing attached by the test authority. The housing

may only be opened by the

GMC-I Gossen-Metrawatt GmbH

service department or other authorized personnel.

4 GMC-I Gossen-Metrawatt GmbH

2 Serial Plate – Terminals

Symbol for system type (U1389: Y, U1387: V, U1381: I)

Type designation

Nom. voltage

Nom. current

Nominal frequency

LED constant

Year of manufacture

Accuracy class

CT: Current transformer transformation ratio

VT: Voltage transformer transformation ratio

Serial number

Pulse outpput

(Max. current)

External auxiliary

Type dependant

designation

Type approval

The values of CT, VT and S∅on the serial plate can be / are calibrated

Bus connection

voltage

GMC-I Gossen-Metrawatt GmbH 5

Voltage Voltage Voltage

Current Current Current

L3L2L1 N

CurrentCurrentCurrent

Inputs

≤2.5 mm2 with wire end ferrules or

≤16 mm2 without wire end ferrule

≤2 x 1.5 mm2 without wire end ferrule

Voltage:

Current:

≤

2.5 mm

with wire end furrule or

≤

2 x 1.5 mm

without wire end ferrule

Auxiliary voltage

BUS

Enable key

24 V

10%

(Feature H1)

Pulse

output

12 3 4 5 6 78 9112021222324

+–

Tighten screws by hand only! Tightening torque

Note:

Observe the wiring diagram in the terminal cover

Attention:

!for current terminals (No. 1, 3, 4, 6, 7 and 9) = 2 Nm

for all other terminals (No. 2, 5, 8, 11, 20 to 24) = 0.4 Nm

6 GMC-I Gossen-Metrawatt GmbH

3 Pulse Output – Bus Interfaces

underligned values are default values in as-delivered condition

The interface descriptions for the active energy meters are

available on the Internet under www.gossenmetrawatt.com.

Pulse rates fix V1/V3 Programmable V2/V4

Direct

U1281 / U1289

1000 pulses/kWh

…

1000 pulses/kWh

Transformer

U1381 / U1387 / U1389

f (secondary) f (secondary)

CT = VT = 1 (Q0) 1000 pulses/kWh

…

1000

…

10000 pulses/kWh

CT, VT progr. (Q1) 1000 pulses/kWh

…

1000

…

10000 pulses/kWh

CTxVT; CT, VT fixed (Q9)

f (primary) f (primary)

1 …10 1000 pulses/kWh 1 …1000 pulses/kWh

11 …100 100 pulses/kWh 0,1 …100 pulses/kWh

101 …1000 10 pulses/kWh 0,01 …10 pulses/kWh

1001 …10000 1 pulses/kWh 1 …1000 pulses/MWh

10001 …100000 0,1 pulses/kWh 0,1 …100 pulses/MWh

100001 …1000000 0,01 pulses/kWh 0,01 …10 pulses/MWh

External Voltage Source

Energy Import

max. 40 V

AC/DC

Energy Import

max. 375 V

24 V DC

I = max. 100 mA

I = max. 27 mA

External Voltage Source

Pulse duration: 30 ms + 5%, Interpulse period: > 30 ms

GMC-I Gossen-Metrawatt GmbH 7

4 Display and Control Panel

4.1 Test LED

The test LED is located between the LCD and the serial

plate. The higher the measured power value, the higher the

blink rate.

If all currents are lower than the starting current, the LED

lights up permanently.

LED Constant

U128x: 10 000 pulses/kWh

U138x: 100 000 pulses/kWh

4.2 Resolution of Energy Import Main Display

* the calibration reading indicates an additional digit after

the decimal point. Therefore, the leading digit is omitted in

the case of 7-digit presentation.

Meter

Feature

CTxVT

min.

CTxVT

max.

Standard

Reading

Calibration

Reading *

Unit

U1281,

U1289 — — 123456.7 23456.78 kWh

U138x

Q0, Q1

or Q9 1 10 12345.67 2345.678 kWh

Q1 or Q9

11 100 123456.7 23456.78 kWh

101 1000 1234567 234567.8 kWh

1001 10000 12345.67 2345.678 MWh

10001 100000 123456.7 23456.78 MWh

100001 1000000 1234567 234567.8 MWh

8 GMC-I Gossen-Metrawatt GmbH

4.3 Meanings of Symbols on the LCD

Main display

is not/cannot be calibrated,

is displayed.

Correct connection:

Continously lit phase symbols

Phase failure:

Symbol for affected phase is cleared from display.

Incorrect phase sequence:

Phase symbols blink in the following order: 3-2-1.

Negative power:

Respective phase symbol blinks.

4 quadrant display of instantaneous power: posi-

tive or negative active power P, positive or nega-

tive reactive power Q.

For bus connection: appears when the

meter transmits a data packet.

Main display (active energy Etot* in kWh or MWh)

Auxiliary display (instantaneous power Pmom* in kW or MW)

Error: alternating error code and instantaneous power

* U138x: CT and VT are taken into consideration

GMC-I Gossen-Metrawatt GmbH 9

Key Symbols for Parameters Configuration

Key and 2nd key bit blanked:

Parameters CT, VT or SØ configurable according to

features, can be disabled with enable key.

Key displayed with one key bit:

Parameters CT, VT or SØ disabled,

can be changed after activating enable key.

Key blanked, 2nd key bit displayed:

Parameters CT, VT or SØ (which are / can be cali-

brated) are preset at the factory, can be queried in the

display mode, other values can be set.

Key with 2nd key bit displayed: parameters (which can be /

are calibrated) are preset at the factory, other values are

disabled with enable key and can be reset after cancel-

ling the disable function.

Values which are preset at the factory are specified addi-

tionally on the serial plate in as-delivered condition.

Symbols Adjustable

parameters

Disabled

parameters

Fixed/

calibrated

parameters

Feature

CT, VT Q1

SØ V2, V4

CT, VT Q1

SØ V2, V4

CT, VT SØ Q1 and V1/V3

SØ CT, VT

V2/V4 and Q0/Q9

CT, VT SØ Q1 and V1/V3

SØ CT, VT

V2/V4 and Q0/Q9

SØ, CT, VT

V1/V3 and Q0/Q9

10 GMC-I Gossen-Metrawatt GmbH

4.4 Key Operation

Querying parameter values CT, VT and S∅

Apart from the LCD test, the menu key located between

LCD and serial plate serves to query current paramter val-

ues and, in the case of active energy meters with special

features, to change parameters (provided that the enable

key has been activated before). The sequence can be seen

from the figure on the right.

If no key is pressed for 2 minutes, the display returns auto-

matically to the standard setting.

Parameters can be changed in the following instruments:

Parameters CT, VT for U138x with feature Q1,

parameters S∅for U128x/U138x with feature V2/V4

a) Enabling parameter modifications

The enable key serves to enable or disable paramter

changes. It is located below the terminal cover and is acti-

vated with a pointed object (e. g. ballpen).

Pressing the key for the first time activates operating mode

„Change parameters“ (key off):

Renewed activation disables operating mode „Change

parameters“ (key on):

If the key is not activated for approx. 2 minutes, operating

mode „Change parameters“ is automatically aborted and

blocked.

The key is displayed again:

→

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