AMETEK MX CTSH - Manual (Page 18)

California Instruments Revision H 18
User Manual MX Series CTSH Compliance Test System
Minimal R
sce
Admissible individual
harmonic current I
n
/I
1
*
%
Admissible harmonic current
distortion factors
%
I
5
I
7
I
11
I
13
THD PWHD
33 10.7 7.2 3.1 2 13 22
66 14 9 5 3 16 25
120 19 12 7 4 22 28
250 31 20 12 7 37 38
≥
350 40 25 15 10 48 46
Note 1- The relative value of even harmonics shall not exceed 16/n %.
Note 2 - Linear interpolation between successive R
sce
values is permitted.
* I
1
= rated fundamental current; I
n
= harmonic current component.
Table 2-3: Stage 2 current emission limits for balanced three-phase equipment
Minimal R
sce
Admissible individual
harmonic current I
n
/I
1
*
%
Admissible harmonic current
distortion factors
%
I
5
I
7
I
11
I
1 3
THD PWHD
33 10.7 7.2 3.1 2 13 18
≥
120 40 25 15 10 48 46
Note 1- The relative value of even harmonics shall not exceed 16/n %.
Note 2 - Linear interpolation between successive R
sce
values is permitted.
* I
1
= rated fundamental current; I
n
= harmonic current component.
Table 2-4: Stage 2 current emission limits for balanced three-phase equipment
with given phase angle conditions
Stage 3:
No specific limits apply for stage 3 connection equipment. The connection of the equipment must be
negotiated with the local utility. The CTS system will provide test data which documents the amount of
current harmonics emissions produced by the EUT. No limits are applied in this mode so there is no pass
or fail test result in this case.