Fema C Series User Manual

FEMA ELECTRÓNICA . Series C . C40-D
6
1.10 Measuring AC voltages and AC currents
• AC signal ranges
The instrument accepts the measure of AC voltages and
currents, with ranges from 60 mVac up to 600 Vac, cov-
ering from shunt signals to typical power line voltages
of 48 Vac, 115 Vac, 230 Vac and even 380 Vac. Both
phase - to - neutral and phase - to - phase measures are accepted.
AC currents signals up to 5 Aac are accepted, and it has a range of
20 mAac.
• ‘True RMS’ measure
AC measure are TrueRMS. The instrument assigns a ‘dead band’
around 0, with a congurable value between 0 and 100. Value is em-
pirical, and by default is set to 20. The ‘dead band’ can be congured
at the ‘Conguraon menu’ (see secon 1.29.7).
• Scaling
The instrument allows to scale the reading to 4 digits (9999 / -1999)
with congurable decimal point to any posion. The ‘second scaling’
funcon can also be used (see secon 1.25).
• Maximum oversignal
‘Maximum oversignal’ is the maximum signal accepted by the in-
strument. Higher signal values may cause instrument damage. Low-
er values are non destrucve but may be out of accuracy specica-
ons.
• Response mes
The response me to a signal step is 300 mSeconds, independent of
the signal range selected.
• Terminal 5 ‘mulfuncon’ - External control
Terminal 5 remains congured as ‘EK’ external control funcon. See
secon 1.9 for a list of available funcons.
• Start-up, connecons and jumpers
For instrument start-up follow the steps listed at secon 1.7. Signal
connecons are indicated at secon 1.5. Locaon for internal jump-
ers is indicated at secon 1.9.
Vac ranges
(Ve.)
Scale
by default
Scalable Jumper ‘S’
(see secon 1.9)
Jumper ‘T’
(see secon 1.9)
Accuracy
(% FS)
Max.
oversignal
Connecon
( terminals)
Z
in
~ 600 Vac* 600
from 9999
to -1999
G I
4-5
<0.30 %
(up to 150 Hz)
800 Vac
1(
~ ) 4(~ )
12 M
~ 200 Vac 200.0 I 800 Vac 12 M
~ 20 Vac 20.00 A I 150 Vac
2(
~ ) 4(~ )
1 M
~ 2 Vac 2.000 B I 100 Vac 100 K
~ 200 mVac 200.0 C I 30 Vac 10 K
~ 60 mVac 60.0
E I
3 Vac 1 M
Table 4 - Measuring ranges in Vac. *See secon 1.34 for category of measure.
Aac ranges
(Ve.)
Scale
by default
Scalable Jumper ‘S’
(see secon 1.9)
Jumper ‘T’
(see secon 1.9)
Accuracy
(% FS)
Max. oversig-
nal
Connecon
( terminals)
Z
in
~ 5 Aac 5.00
from 9999
to -1999
I
4-5
<0.50 %
(up to 150 Hz)
7 Aac
(max. 7 sec.)
3(~ ) 4(~ ) 20 mOhm
~ 20 mAac 20.00 D I 25 mAac 2(~ ) 4(~ ) 4.7 R
Table 5 - Measuring ranges in Aac
Applicaons
... with shunts ...
measure of AC currents through a cur-
rent shunt of 60 mV, 100 mV or 150 mV
and scaled reading
... with X/5, X/1 current
transformers ...
measure of AC currents through a X/5
or X/1 current transformer and scaled
reading
... direct measure ... direct measure of currents up to 5 Aac
... with power line voltages ...
measure of voltages over power lines
phase and neutral, of 230 Vac, 115 Vac,
...
... with power voltages ...
measure of phase to phase lines on
power lines 380 Vac, 230 Vac, ...
... with AC voltages
measure of AC voltages in panels using
24 Vac, 48 Vac, ...
Table 6 - Applicaons with measure of AC signals
See below a list of typical connecons :
~5 Aac
~5 Aac
12345
~600 Vac
~600 Vac
12345
~60 mVac
~60 mVac
12345
• 5 Aac• 600 Vac
• 200 Vac
• 20 Vac to 60 mVac
• 20 mAac

Fema C Series Specifications

General

Brand	Fema
Model	C Series
Category	Measuring Instruments
Language	English