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Table 2. Electrical Measurement Specifications
Intrinsic Er-
ror or Influ-
ence Quan-
tity
Reference Con-
ditions or Speci-
fied Operating
Range
Designation
Code
Requirements
or Test in Ac-
cordance with
the Relevant
Parts of
IEC 1557
Type
of
Test
Intrinsic error Reference condi-
tions
A Part 5, 6.1 R
Position Reference posi-
tion
± 90°
E1 Part 1, 4.2 R
Supply volt-
age
At the limits
stated by the
manufacturer
E2 Part 1, 4.2,
4.3
R
Temperature 0 °C and 35 °C E3 Part 1, 4.2 T
Series inter-
ference volt-
age
See 4.2 and 4.3 E4 Part 5, 4.2,
4.3
T
Resistance
of the probes
and auxiliary
earth elec-
trodes
0 to 100 x R
A
but ≤ 50 kΩ
E5 Part 5, 4.3 T
System fre-
quency
99 % to 101 % of
the nominal fre-
quency
E7 Part 5, 4.3 T
System volt-
age
85 % to 110 % of
the nominal volt-
age
E8 Part 5, 4.3 T
Operating
error
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
15,1( EEEEEEEEAB +±=
Part 5, 4.3 R