RCTrms
Industrially specified true rms ac current transducer
RCTrms - Thin, flexible, clip-around,
ac current transducer with true rms
output
The RCTrms is an ac current transducer for permanent installation. Simple
to install and easy to retrofit it combines the benefits of a thin, flexible,
clip-around Rogowski (sense) coil with a signal conditioner providing
accurate, true rms measurement, of ac current.
The RCTrms has an industry standard 4-20mA output making it ideal for
process control, status alarming or system monitoring purposes. Typically
the RCTrms is used with SCADA systems, PLCs, data loggers and protection
equipment.
The RCTrms is an ac current transducer providing a
4 to 20mA output proportional to the true rms of
the primary current and has the advantages:
Easy to retrofit
Simple to install in applications where space is limited
The size of the Rogowski coil can be specified
independently of the primary current
Does not suffer from magnetic saturation
Intrinsically safe
Ideal for process control, status alarming or system
monitoring in a wide variety of applications, from arc
furnaces to power distribution.
Power Electronic Measurements
Dimensions
55
60
Specifications
All dimensions mm
35
13
.5
RCTrms
O2
5
O6.8
25.2
20
O8.5
Diameter (mm) =
Coil Length (mm) / 3.2
86
4
10
20
58
1
35
Features
Traceable calibration
- Every unit is supplied with a traceable calibration
certificate
- No magnetic materials means excellent linearity
<0.2% of reading
Fully isolated measurement
- Isolated power supply 2kVdc
- Coil rated at 2kVpeak (withstand test is 4kVrms /
50Hz/ 60 sec)
Small DIN rail (or panel mount) enclosure – UL94
V-0 rated
Rated current (rms)
100A
250A
500A
800A
1000A
1600A
2000A
2500A
3000A
4000A
5000A
8000A
10000A
16000A
20000A
25000A
40000A
50000A
Rated output (Full scale FS)
4 to 20mA
Output limit
150% FS (28mA)
Supply voltage (Wide input)
12Vdc (-10%) to 24Vdc (+20%)
Input power
0.7W (at rated output)
Operating temperature range
–5oC to +65oC (Integrator electronics)
–20oC to +80oC (Coil and cable)
Bandwidth (-3dB)
2Hz to 100kHz
Max. Response time (10 to 90%) 1000ms
Accuracy (typ.)
±1.5% of reading
(10% to 150% FS, 25oC)
Output load
< 300
Coil Length
300mm, 500mm or 700mm
Custom lengths available
Cable Length
(coil to electronics)
1m or 2.5m
Custom lengths available
Connections
Options
Isolated BNC-BNC cable split option
- Between coil and electronics to enable ease of
installation e.g. threading through existing conduit.
Standard cable permanently fixed
IP65 die-cast aluminium panel mount enclosure
Standards and Approvals
CE marked
Complies with EMC EN 61326-1 2006
PEM Ltd is an ISO9001:2008 registered company
Complies with IEC61010-1:2001
Order code RCTrms
The RCTrms order code can be generated as follows:
Rated
current (A)
Cable
Length (m)
Coil
Length (mm)
Options
250A
500A
...
50000A
1m
2.5m
...
Custom
lengths
300mm
500mm
700mm
...
Custom
lengths
BC-BNC
Split in Cable
IRF-Die-cast
aluminium
enclosure
For example: RCTrms /2000/1/300 has a rated primary
current 2000A, 1m cable, 300mm coil and no ‘options’
Further information
The RCT can be configured to suit a great many applications.
If your requirement is outside that listed in this datasheet please
contact us to discuss your application.
More detailed technical advice is available at www.pemuk.com
Power Electronic Measurements
Gloucester House, Wellington Street, Long Eaton,
Nottingham. NG10 4HT. United Kingdom.
T +44 (0) 115 946 9657.
F +44 (0) 115 946 8515.
E info@pemuk.com
W www.pemuk.com
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