Novatech Bitronics PowerPlex II, Руководство пользователя, Страница: 33 / 136

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ML0044B December 1, 2017 Copyright 2016 Bitronics, LLC
2.1 Installation
WARNING - INSTALLATION AND MAINTENANCE SHOULD ONLY BE
PERFORMED BY PROPERLY TRAINED OR QUALIFIED PERSONNEL
.
2.2 Initial Inspection
Bitronics instruments are carefully checked and "burned in" at the factory before
shipment. Damage can occur however, so please check the instrument for shipping
damage as it is unpacked. Notify Bitronics LLC immediately if any damage has
occurred, and save any damaged shipping containers.
2.3 Protective Ground/Earth Connections
The device must be connected to Protected Earth Ground. The minimum Protective
Ground wire size is 2.5 mm
2 (#12 AWG). Bitronics LLC recommends that all
grounding be performed in accordance with ANSI/IEEE C57.13.3-2005.
2.4 Overcurrent Protection
2.4.1 Overcurrent Protection - Voltage Signal Measurement Inputs (VTs)
VT inputs should only be connected to voltage systems with nominal Line to Neutral
voltages of 600Vac or less. If the nominal Line to Neutral voltage will be greater than
300Vac, external fuses shall be provided at the input to the VT terminal for all live
conductors.
For UL/CSA: Bitronics recommends UL 248 certified fuses, rated 600V, 3A, fast
acting (F), no time-delay fuses (such as Bussmann KTK-3).
For CE: Bitronics recommends fuses certified to IEC 60269, rated 690V, 3A, fast
acting (F), high-breaking capacity (such as Mersen FR10GR69V3).
The fuses shall additionally be enclosed in an appropriate fuse holder to prevent the
possibility of a fuse shattering and spraying metal pieces. The fuse and fuse holder
must carry a voltage rating appropriate for the power system on which it is to be used.
A fast acting fuse with a current rating lower than 3 Ampere is permitted.
2.4.2 Overcurrent Protection – DC PWR (Low Voltage DC Power)
To maintain the safety features of this product an external fuse shall be provided at the
input to the positive (+) DC PWR terminal. Bitronics recommends UL 248 certified fuse
rated 32Vdc (min or greater), 10A fast acting (F), no time delay fuse or fuse certified to
IEC 60127 rated 32Vdc (min or greater), 6.3 Ampere fast acting (F) no time delay
fuse. The fuse shall additionally be enclosed in an appropriate fuse holder to prevent
the possibility of a fuse shattering and spraying metal pieces. The fuse and fuse
holder must carry a voltage rating that is appropriate for the dc circuit on which it is
being used.