The power consumption of the Alcatel-Lucent 1850 TSS-5 products is dependent on the circuit packs installed and their operating state. These variables must be taken into account when sizing the power system.
The following table lists Alcatel-Lucent 1850 TSS-5 power requirements.
|
Item |
Description |
|---|---|
|
Voltage range |
−40 to −57 VDC +20 to +28 VDC |
|
Power Feeders |
A and B (−48 VDC or +24 VDC) |
|
Circuit Breakers |
Two, 8A fuses |
Alcatel-Lucent 1850 TSS-5 has the following maximum current drain requirements.
Alcatel-Lucent 1850 TSS-5 products require a reliable low-noise power source in accordance with GR-947.
Refer to Telcordia ® Generic Requirements for a −48 VDC and +24 VDC Telecommunications Switchmode Rectifier/ Power Supply, GR-947, Issue 1, December 1996.
This is usually accomplished by float charging batteries at the input to the Alcatel-Lucent 1850 TSS-5 shelves. Batteries are installed to provide backup power in the event of AC power outages. When deployed in a float charge configuration they also provide filtering of AC power line drop outs and noise generated by equipment in the cabinet. In all cases power must be configured to avoid dropping below or exceeding the voltage limits listed in Table 6-3, Alcatel-Lucent 1850 TSS-5 Power supply requirements.
Care must be taken to insure that electrical noise generated by the power system, fans, or other equipment does not interfere with the operation of the Alcatel-Lucent 1850 TSS-5 products. Electrical noise on the −48 VDC or +24 VDC power lines at the shelf must not exceed the voice frequency and wide-band noise limits in accordance with GR-947.
Momentary AC power line interruptions are accommodated by the batteries on float charge.
While there is no requirement to limit the rate of power application to the Alcatel-Lucent 1850 TSS-5 shelves, the voltage at the shelf must remain within the specified limits at all times.
In all cases battery backup power must be configured to avoid dropping below the voltage limits listed in Table 6-3, Alcatel-Lucent 1850 TSS-5 Power supply requirements. The preferred method of battery backup is a float charge configuration. Alternatively, a separate battery and charger system can be used utilizing a diode "OR" configuration. Systems employing transfer switches are not recommended unless sufficient capacitance is installed to carry the system over through the transfer period.
Grounding must meet the following appropriate requirements for outside plant and customer premises applications
Telcordia ® Network Equipment - Building System (NEBS) Requirements: Physical Protection, GR-1089-CORE, Issue 5 August 2009.
UL: UL 60950/ CAN/CSA- 22.2 NO. 60950-00 “Safety of Information Technology Equipment,” December 2000
NEC: National Fire Protection Agency (NFPA-70), National Electrical Code (NEC), 2002 Edition
The Alcatel-Lucent 1850 TSS-5 shelves require a single common ground reference. The Alcatel-Lucent 1850 TSS-5 shelf frame must be bonded to an earth ground within the cabinet. Alcatel-Lucent 1850 TSS-5 shelf mounting screws should be used to provide a low impedance multipoint electrical connection through the mounting structure to earth ground. A frame ground wire located on the shelf must be connected to the cabinet ground.
The DS1/E1 and DS3/E3 interfaces (traffic ports) or other metallic telecommunications interfaces must not leave the cabinet unless connected to telecommunications devices providing primary and secondary protection, as per GR-1089 and UL-60950 (UL 60950/ CAN/CSA- 22.2 NO. 60950-00 Safety of Information Technology Equipment, December, 2000).
The Alcatel-Lucent 1850 TSS-5 DS1/E1, DS3/E3, Ethernet ports are tested according to the following note.
WARNING: The intra-building port(s) of the equipment or subassembly is suitable for connection to intrabuilding or unexposed wiring or cabling only. The intra-building port(s) of the equipment or subassembly MUST NOT be metallically connected to interfaces which connect to the OSP or its wiring. These interfaces are designed for use as intra-building interfaces only (Type 2 or Type 4 ports as described in GR-1089-CORE, Issue 5) and require isolation from the exposed OSP cabling. The addition of Primary Protectors is not sufficient protection in order to connect these interfaces metallically to OSP wiring.
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