User Manual

77
Quantities associated with power
Measurement
Measurement range
Display resolution Maximum intrinsic error
Minimum Maximum
Phase differences of funda-
mentals
-179° 180° 1° ±2°
cos Φ (DPF) -1 1 0.001
±1° for Φ
±5 ct for cos Φ
tan Φ -32.77
(1)
32.77
(1)
0.001
tan Φ < 10
±1° for Φ
0.01
tan Φ ≥ 10
Voltage unbalance (UNB) 0 % 100 % 0.1 %
±3 ct
UNB ≤ 10%
±10 ct
UNB > 10%
Current unbalance (UNB) 0 % 100 % 0.1 % ±10 ct
(1) |tan Φ| = 32,767 corresponds to Φ = ±88.25° + k × 180° (k being a natural number)