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<br />r29~11/ <br />WILTEL \ <br /> <br />i <br /> <br /> <br />powered or DC powered systems. For AC systems, this power is wired directly to the <br />system. For DC systems, this power source would connect to the rectifiers, which would <br />convert to -48VDC for distribution to the system. <br /> <br />In North America, the power supplied can be either 208Y or 240 volt AC nominal. Three <br />phase is not required but single power feeds from alternate phases would be normal <br />practice where three phase power is available. The following table show the exact input <br />voltage range: <br /> <br />INPUT POWER SPECIFICATIONS <br /> <br /> <br />INPUT MINIMUM NOMINAL MAXIMUM <br /> <br /> <br />Voltage (VAC) at pedestal 180 208/240 250 <br /> <br /> <br />Frequency (Hz) 6 47 50/60 63 <br /> <br /> <br />TRANSIENT TOLERANCE (See Note) <br />Amplitude Duration <br />Surges 288 V ac 8.34 mS to 50 IDS <br /> <br />, <br />276 Vac 50 mS to 500 mS <br /> <br /> <br /> <br /> <br />Sags 146 Vac 8.34 mS to 50 mS <br /> <br /> <br />166 V ac 50 mS to 500 mS <br /> <br /> <br /> <br /> <br />Spikes 815 V pk <4.17 mS <br />815 V pk to 408 V pk 4.17 to 8.3 mS <br /> <br /> <br /> <br />Notches to 0 V <4.17 mS <br /> <br />0 V to 206 V 4.17 mS to 8.3 mS <br /> <br />Note: These values are taken from the National Electric Code and various Talco <br />specifications. All transients are applied at the peak of the AC waveform. <br /> <br /> <br />All power feeds used should contain a separate safety conductor (green wire). Northern <br />Telecom strongly recommends that the supply conductors be dedicated and uninterrupted 1 <br />from a building primary source to a dedicated equipment room sub-panel. <br /> <br />Power Sub-Panel <br /> <br />Power sub-panels must meet the following requirements or be modified when used for the <br /> <br /> <br />Customer: ~ '" <br />Revised 9/24/94 Page 4 of 10 WilTel: (" ,) <br />~ <br />