Instruction Manual

z TRUE RMS OUTPUT
z JUMPER SELECTABLE RANGES
z OUTPUT IS MAGNETICALLY ISOLATED FROM THE INPUT
z SPLIT-CORE CASE
GENERAL DESCRIPTION
CTR Series transducers combine a current transformer and a signal
conditioner into a single package. This provides higher accuracy, lower wiring
costs, easier installation and saves valuable panel space.
The CTR Series transducers are available in 4-20 mA output only. The CTR
Series provides a “True RMS” output on distorted waveforms found on VFD or
SCR outputs, and on linear loads in “noisy” power environments. Select the
CTR Series for variable speed or SCR controlled loads.
The current waveform of a typical linear load is a pure sine wave. In VFD and
SCR applications, however, output waveforms are rough approximations of a
sine wave. There are numerous spikes and dips in each cycle. CTR transducers
use a mathematical algorithm called “True RMS”, that integrates the actual
waveform over time. The output is the amperage component of the true power
(heating value) of the AC current waveform.True RMS is the only way to
accurately measure distorted AC waveforms.
SAFETY SUMMARY
All safety related regulations, local codes and instructions that appear in the
literature or on equipment must be observed to ensure personal safety and to
prevent damage to either the instrument or equipment connected to it. If
equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Do not use this unit to directly command motors, valves, or other actuators
not equipped with safeguards. To do so, can be potentially harmful to persons or
equipment in the event of a fault to the unit.
SPECIFICATIONS
1. OUTPUT SIGNAL: 4 to 20 mA DC, loop-powered, True RMS
2. OUTPUT LIMIT: 23 mA
3. FREQUENCY RANGE: 10-400 Hz (All Waveforms)
4. RESPONSE TIME: to 90% of step change 600 msec
5. ACCURACY: 0.8% FS
6. POWER SUPPLY: 24 VDC Nominal, 40 VDC Max.
7. INPUT RANGES: (Jumper Selectable)
8. ISOLATION VOLTAGE: 3 kV
9. CASE: UL 94V-0 Flammability rated thermoplastic
10. ENVIRONMENTAL: -4 to 122 °F (-20 to 50 °C)
0-95% RH, non-condensing
11. TORQUE RATINGS: 9 in-lbs
12. LISTING: UL 508 Industrial Control Equipment, CSA C22.2 No. 14-M95,
and CE Certified.
MODEL CTR - TRUE RMS AC CURRENT TRANSDUCER
CAUTION: Read complete
instructions prior to installation
and operation of the unit.
CAUTION: Risk of electric shock.
Bulletin No. CTR- X
Drawing No. LP0653
Effective 10/06
Tel [phone]
Fax [phone]
www.redlion.net
MODEL RANGE
MAXIMUM
6 secContinuous 1 sec
CTR05
10 A 125 A80 A 250 A
20 A 150 A110 A 300 A
50 A 215 A175 A 400 A
CTR2
100 A 300 A200 A 600 A
150 A 450 A300 A 800 A
200 A 500 A400 A 1000 A
0.85
(21.6)
0.85
(21.6)
2.25
(57.2)
3.53
(89.7)
3.04
(77.2)
1.18
(30)
0.45
(11.4)
2.40
(31)
Ø 0.19
(4.83)
DIMENSIONS In inches (mm)