Chauvin Arnoux C.A 773, User Manual

Page: 35 / 104

35
3. CHARACTERISTICS
3.1. REFERENCE CONDITIONS
Influence quantity Reference values
Temperature 23 ± 5°C
Relative humidity 30 to 75% RH
Power supply voltage 3 ± 0.1 V
Frequency of the measured signal DC or 45 to 65 Hz
Type of signal sinusoidal
External electrical field < 1 V/m
External DC magnetic field < 40 A/m
3.2. ELECTRICAL CHARACTERISTICS
3.2.1. VOLTAGE
Nominal voltages: 12, 24, 50, 127, 230, 400, 690, 1000 V
ac
/ V
dc
and 1400 V
dc
.
Intrinsic uncertainty: ± (3% + 5 ct)
Resolution:
0,1 V from 1 to 299,9 V
1 V from de 300 V
Operating frequency: DC and 16.67 to 800 Hz
Maximum input current: 3.5 mA
rms
.
Input impedance > 500 k
W
.
Response time < 500 ms.
Response time of
ELV indicator < 1 s.
The indicator corresponding to voltage V lights up before the voltage reaches 85%V.
If the voltage present is < 12 V, no indicator is lit.
If the voltage present is < 1 V, the digital display is off.
The C.A 773 must be used on voltage-normalized networks only.
Operating cycle: 30 s (maximum time that the device can be connected to a live
element) - 240 s (minimum rest time during which the detector must not be con-
nected to a live element).
3.2.2. CONTINUITY
Continuity detection is inhibited if a voltage > 1 V is present.
Measurement range: 0 to 3 k W
Intrinsic uncertainty: ± (3% + 5 ct)
Resolution: 0,1
W
from 1 to 299,9
W
0,001 k
W
from 0,3 to 3 k
W
Audible signal triggering threshold: 100 W -0% +50%
Test current
≤
1 mA
Open circuit voltage
≤
5 V
3.2.3. PHASE IDENTIFICATION
15 Hz < frequency < 65 Hz
50 V
ac
< voltage < 1000 V
ac
for 45 Hz < frequency ≤ 65 Hz
150 V
ac
< voltage < 1000 V
ac
for frequency < 45 Hz