The Precision Electronically Compensated Current Transformer CMR-I is a small-sized electronically compensated current transformer unit for isolated precision current transmission.
Properties
- Standalone through-hole precision electronically compensated transformer with single wire capability.
- Excellent accuracy and dynamics.
- Remote control via serial communication.
- Monitoring of individual contact resistance and power loss.
- Protection against open circuit and overload.
- Programmable load by-pass.
- Automatic unused position by-pass.
- Easy prepaid and smart meters testing.
- Easy implementation to existing systems.
- Simple user test of functionality and accuracy.
- Accuracy maintained for any up or down current transformation.
Technical data
| CMR-I 2130 | |
| Max. ampere-turns |
240 A |
|---|---|
| Max. output power | 120 VA @ 240 A |
| Size | 160 x 125 x 90 mm |
| Weight | approx. 5 kg |
| CMR-I 2230 | |
| Max. ampere-turns | 2 x 240 A |
| Max. output power | 2 x 120 VA @ 240 A |
| Size | 160 x 125 x 170 mm |
| Weight | approx. 7 kg |
| CMR-I 2330 | |
| Max. ampere-turns | 3 x 240 A |
| Max. output power | 3 x 120 VA @ 240 A |
| Size | 160 x 125 x 250 mm |
| Weight | approx. 9 kg |
Ns – number of secondary turns; Np – number of primary turns
| Output / Input ratio | Defined by input and output turns (1:1 for single wire circuit) |
|---|---|
| Dynamics | > 200 000 (240 A : 1 mA for single wire) |
| Max. output voltage | 0,3 V . Ns |
| Operating frequency | 45 ... 65 Hz |
| Max. load resistance | 0,05 ohm . Ns2 |
| Primary current range | 1 mA / Np ... 240 A / Np |
| Max. Amplitude/Phase Error (1 mA ... 240 A) | 0,05 %/0,03° (CMR-I 2x30A); 0,02 %/0,01° (CMR-I 2x30E); 0,01 % /0,005° (CMR-I 2x30S) |
| Communication interface |
RS-422 |
| Protection | Overload, open circuit |
| Hole Diameter | ø 26 mm |
| Power Supply PSCI 1220A | for max. 20 ks |
| Input Voltage Range | 85 ... 264 VAC / 50 ... 60 Hz |
| Dimensions (D x V x Š) | 100 x 118 x 220 mm |
| Weight | approx. 2 kg |