Schneider Electric PM810, PM870, PM820, PM850 manual Appendix D-Advanced Power Quality Evaluations

PowerLogicTM Series 800 Power Meter	63230-500-225A2
Appendix D—Advanced Power Quality Evaluations	3/2011

Figure D–1: ITI (CBEMA) Curve

Percent of Nominal Voltage (RMS or Peak Equivalent)

500

400

300

200

140

120

100

80

70

40

0

ITI (CBEMA) Curve

Prohibited Region

Voltage Tolerance Envelope Applicable to 120, 120/208, and 120/240 Nominal Voltages

No Interruption In Function Region			110
			90
	No Damage Region
20 ms	0.5 s	10 s	Steady
Duration in Seconds (s)			State

Table D–3: Categorized disturbance levels (F-47)

Sag levels

80% — 90%

70% — 80%

50% — 70%

0% — 50%

Table D–4: Duration categories

Duration

< 50 msec

50 msec — 200 msec

200 msec — 500 msec

500 msec — 1000 msec

>1000 msec

Figure D–2: Voltage Sag ride-through capability

Duration of Voltage Sag in Seconds

Perecent of Equipment Nominal Voltage

0.05 0.10 0.20 0.50 1.00

100

90

80

70

60

50

40

30

20

10

0

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