Development and production of systems for measurement and control
4. Connection
4.1. Supply voltage
Supply voltage is required to operate the PLA34. The type and level of the necessary supply voltage is written on the
back label. Before applying the supply voltage, make sure that the voltage level and system frequency match the
details on the label. The connection cables for the supply voltage has to be connected using a fuse. Use a fuse (6 A
type C).
4.2. Measuring inputs
Voltage measuring inputs have to be connected via circuit breaker or switch and fuse (10 A) which are placed close
to the device. Current measuring inputs have to be connected via current transformers, either ../5A or ../1A ratio.
Picture 3: Full device connection at TN-C network
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