Nortel Networks 5000i manual Power Noise, Grounding, Condition Description

Checking the Voltage{ XE "Scanner installation:Check the voltage" }

Before you plug the 5000i scanner into the designated wall outlet, the following power and grounding requirements must be met and maintained to ensure optimum performance of the scanner and its peripherals. To verify that the power and grounding requirements have been met, refer to the following topics: Power Noise, Grounding, and Site Power Wiring{ XE "Wiring" \t "See Site power wiring recommendations" } Recommendations.

Power Noise

The 5000i scanner is designed to operate satisfactorily under conditions of reasonable input power noise. Input power noise specifications { XE "Power noise specifications" } are as follows:

Condition	Description
Definitions	Surge or Sag – any sudden positive or negative excursion in the level
	of the input voltage having a duration from 0.005 to 5 seconds.
	Transient { XE "Transient specifications" }– any sudden positive or
	negative change in the level of the input voltage having a duration of
	between 1 nanosecond and 5 milliseconds.
Limits	No surge or sag shall exceed ± 15% of the normal rated voltage.
	However, the surge or sag shall be considered acceptable provided its
	amplitude does not exceed ± 50% of the normal rated voltage and it
	returns to the steady-state rated level within 3 cycles of input power.
Recommendations	Dedicate a feeder line between the main building power panel and the
	system branch circuit power panel serving the 5000i system.
	If transients, surges, or sags outside of the limits stated above exist with
	a dedicated feeder, do one or both of the following.
	• Install a line conditioner to limit transients.
	• Use a constant-voltage isolation transformer to control surges or
	sags.

Grounding

Proper system grounding is extremely important to the safe and reliable operation of the system. The 5000i scanner ground must meet two requirements:

1.It must serve as a return path for current in case of a short circuit between the power line and the chassis of any system component.

2.It must serve as the ground reference point for the 5000i system components and data cables.

Page 10 5000i Scanner Installation Guide