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Gossen Metrawatt MAVOWATT 20 Manual

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E-16
Connecting to an Isolated Current Transformer
Connecting to an Isolated Current Transformer (ISO)
Introduction
Low current monitoring devices made by Dranetz are called isolated current
transformers or ISO boxes. The Dranetz-BMI ISO box has a 5 A current range.
Safety
precautions
The following safety precautions apply to ISO box connections in addition to those
safety precautions stated on page E-3.
• Never energize an ISO box with the secondary open.
• Never disconnect the secondary of an ISO box with primary energized.
WARNING
Physical injury or equipment damage could result if ISO boxes are improperly
connected. Do not connect an ISO box between two conductors which are at
different voltage potentials.
ADVERTENCIA
Podrían producirse lesiones físicas o daños al equipo si se conectan indebidamente
las cajas del transformador aislado de corriente (ISO). No conecte una caja del
ISO entre dos conductores que tengan distintos potenciales de voltaje.
AVERTISSEMENT
Une mauvaise connexion des transformateurs d’intensité isolés (ISO) peut
provoquer des blessures corporelles ou des dégâts matériels. Ne pas relier les
transformateurs ISO entre deux conducteurs de tensions différentes.
WARNUNG
Falsch angeschlossene ISO-Kästen (Isolierte Stromumwandler) können zu
körperlichen Verletzungen oder Geräteschäden fuehren. Schliessen Sie einen ISO-
Kasten nicht zwischen zwei Leiter mit unterschiedlichem Spannungspotential.
Connections to
ISO box
The ISO box has terminal posts labeled X1 and X2 that are connected in series only
with an ac current source. In normal connections, where phasing of current and
voltages are important for power measurements, the X1 terminal is connected towards
the source input line.
Continued on next page
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