Iskra MC320 User Manual

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CONNECTION
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1
6
 Measuringcentres– M
C
320,MC330,MC350&MC350H‐User’sManual


Connection4u(3W4u)
Threephase,fourwire
connectionwithunbalanced
load

PLEASENOTE
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Examplesofconnectionsareshownwithoutinput/outputmodulesandcommunication.
Connectiondoesnotdependonanumberofbuilt‐inmodulesandcommunication,andis
shownonthedevicelabel.
Connectionofinput/outputmodules
WARNING!
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Check the module features that are specified on the label, before connecting module
contacts.Wrongconnectioncancausedamageordestructionofmoduleand/ordevice.

PLEASENOTE
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Frequencyofthetariffinputvoltagesignalshouldnotessentiallydeviatefromthefrequency
ofthemeasuringinputsignal.Atnosignalonthemeasuringinputsthetarifftriggeringis
notreliable.
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3 Connectmodulecontactsasspecifiedonthelabel.Examplesoflabelsaregivenbelowanddescribe
modules built in the device. Information on electrical properties of modules is given in chapter
Modulesonpage49.
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Tariff input module with two tariff inputs for
changeoverbetweenuptofourtariffs.
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Tariff input module with two tariff inputs for
changeoverbetweenuptofourtariffs.

S0 (pulse) output module with two pulse
outputsforenergycounters.

Relay output module with two outputs.
(MC330,MC350,MC350Honly)
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Iskra MC320 Specifications

General

Frequency	50 Hz
Accuracy class	1
Test Voltage	4 kV
Voltage	3 x 230 V / 400 V
Communication	RS485
Standards	IEC 62053-21, IEC 62052-11
Display	LCD