4.1
Reference conditions
■ Temperature : 18 to 28°C
■ Relative humidity : 20 to 75%
■ Conductor centred in the jaws
■ Sinusoidal current : 48 to 65 Hz
■ No direct current
■ Instrument impedance : 2.5 Ω ≤ Z ≤ 5 Ω (at 1.25 VA)
■ Direct-current magnetic field : earth's magnetic field (< 40 A/m)
■ External conductor proximity : no direct of alternating current
■ Intrinsic error or phase difference
NOTE : Linear interpolation between each value (see also the graphs in § 7. APPENDIX)
Current to be
in A AC
measured
in % of In
Intrinsic error (1)
Phase difference
(1) In ±% of the output
(2) See § 4.3.1 Overloads
(3) Unspecified
4.2
Measurement range
Current range
Output-to-input ratio
Frequency range
(1) See § 4.3.1 Overloads
■ ■ ■ ■ ■ Nominal current (In): 500 A AC
■ ■ ■ ■ ■ Nominal load impedance : 5 Ω (at 1.25 VA)
■ ■ ■ ■ ■ Accuracy class : class 1 (at 1.25 VA) in accordance with IEC 185
4. SPECIFICATIONS
4 A
25 A
0.8%
5%
3% +0.5 A
3%
(3)
3°
4 to 600 A AC (1)
1 mA AC/A AC
48 to 1000 Hz
14
100 A
250 A
500 A
20%
50%
In
1.5°
1%
1.5°
1°
600 A (2)
120%