User Manual

99
Hysteresis
Maximum
Duration
Threshold
Return level
Hysteresis
Minimum
Duration
Return level
Threshold
16.4. MINIMUM SCALE VALUES FOR WAVEFORMS AND MINIMUM RMS VALUES
Minimum scale value
(waveform mode)
Minimum RMS values
Phase-to-neutral and phase-to-phase voltages 8 V
(1)
2 V
(1)
AmpFLEX™ A193 (6500 A and 10 kA) 90 A 10 A
MiniFLEX MA193 (6500 A et 10 kA) 90 A 10 A
AmpFLEX™ A193 (100 A) 800 mA 100 mA
MiniFLEX MA193 (100 A) 800 mA 100 mA
J93 clamp 30 A 3 A
C193 clamp 8 A 1 A
PAC93 clamp 8 A 1 A
MN93 clamp 2 A 200 mA
MN93A clamp (100 A) 800 mA 100 mA
E3N clamp (10 mV/A) 800 mA 100 mA
E3N clamp (100 mV/A) 80 mA 10 mA
MN93A clamp (5 A) 40 mA
(1)
5 mA
(1)
5 A and Essailec
®
adapter 40 mA
(1)
5 mA
(1)
(1) Value to be multiplied by the ratio in effect (if not unity).
16.2. DISTRIBUTION SOURCES SUPPORTED BY THE DEVICE
See connections in §4.6.
16.3. HYSTERESIS
Hysteresis is a screening principle that is often used after detection of a threshold stage in Alarm mode (for the C.A 8333
only) (see §4.10). A correct hysteresis setting avoids repeated changes of state when the measurement oscillates about the
threshold.
16.3.1. SURGE DETECTION
With a hysteresis of 2%, for example, the return level for surge detection is equal to (100% - 2%) or 98% of the voltage threshold.
16.3.2. BROWNOUT OR BLACKOUT DETECTION
With a hysteresis of 2%, for example, the return level for brownout detection is equal to (100% + 2%), or 102% of the voltage threshold.