Figure 4-8: Rap-Bg Circuit Breaker Installation; Figure 4-9: Platform Dc Input Power Connector Pin Functions - Eci Telecom NPT-1020 Installation And Maintenance Manual

NPT-1020 Installation and Maintenance Manual
2. Identify the circuit breaker corresponding to the power circuit A of Shelf 1 (the circuit breaker is
included in the installation parts kit supplied with the equipment; its rating is in accordance with the
ordered platform configuration).
3. Insert the circuit breaker into the circuit breaker sockets located on the RAP-BG source A power
terminal board, as shown in the previous figure.
4. If more platforms are powered from source A, repeat Steps 2 and 3 to insert the circuit breakers into
the corresponding platform positions of the power terminal board.
5. If an additional power source is used, repeat Steps 2 to 4 for source B circuit breakers.
To check DC voltage polarity:
1. Make sure the correct site grounding test has been passed successfully (see
Requirements).
2. Connect the DC input power to the RAP-BG.
3. Set all the RAP-BG circuit breakers to ON.
4. Use a digital multimeter (DMM) to test the voltage between the positive and negative contacts of
each power cable.
The following figure identifies the functions of the power cable connector contacts assembled on the
cable end connected to the NPT-1020 platform, as seen when looking into the connector.
5. Make sure the voltage is within the allowed range (-40 VDC to -72 VDC), and that it has the correct
polarity.
6. Return all the RAP-BG circuit breakers to OFF.
ECI Telecom Ltd. Proprietary

Figure 4-8: RAP-BG circuit breaker installation

Figure 4-9: Platform DC input power connector pin functions

Installing Equipment
Grounding
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