280D-F23B-25D-CR A-B Power Board
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Ring lugs are recommended for making CT secondary connections. Standard ring lugs do not pass through the current sensing openings of the PowerMonitor 5000 unit. We recommend that the installer route the wire from the shorting terminal block through the current sensing opening before crimping on ring lugs.
When wiring a PowerMonitor 5000 unit to existing CTs and metering devices, wire the current sensing circuits of the PowerMonitor 5000 unit in series with the CT secondary and current sensing circuits of the existing metering devices. Do not install overcurrent protection or non-shorting disconnecting means in CT secondary wiring. Connect the current sensing circuit to a low-impedance earth ground at only one point. Pay particular attention to the correct phasing and polarity of current sensing connections. The diagrams use the ‘dot’ convention to indicate transformer polarity. The dot indicates the H1 and X1 terminals on the primary and secondary of the CT respectively. Phasing of the CTs must correspond to the phasing of the voltage sensing connections. The following wiring diagrams indicate typical current sensing connections to various types of power systems.
Up to four dry (non-powered) contacts can be connected to the PowerMonitor 5000 unit status inputs. The status input derives 24V DC power from its internal power supply. Connect status inputs by using shielded, twisted-pair cable with the shield connected to the ground bus or other low-impedance earth ground at the contact end only. The diagram indicates typical status input wiring.
The structure and details of the product：
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