Rogowski Coil Operated Transducer
Description
The M250-TRC converts the output from the M240-RCM MultiCoil (Rogowski coil) to either a DC or AC output which is directly proportional to the AC current being measured by the MultiCore. Available DC outputs are 0-1mA, 0-5mA, 0-10mA, 0-20mA, 4-20mA. This product is also available with an output of 0-333mV AC.
The combination of the M250 and the M240 allows the user to replace convenient current transducers and current transformers. With the output of the M250 set for 330mv AC, split-core transformers can also be replaced. This coil / transducer combination offers major advantages over conventional systems, including its compact design and safe, simple connection. The coils are easily clipped around a cable or busbar without having to break the connection of either. The coil is accurate across a range of 80-4000A, so there is no need to order a variety of products with differing current ratings. This offers the added advantage of stock holding being reduced.
The M250 can be pre-set to what every current monitoring value require, Example 0-900A = 0-333V (range 9A to 900A will be monitored).
Coil
The M240-RCM is available in a variety of standard lengths to suit most installation scenarios.
Special lengths are available on request.
Power Supply
The M250-TRC has a universal power supply capable
of the following ranges:
Standard:
AC: 75V – 277V 50/60Hz
DC: 48V – 300V
Specifications
Power Supply
| Supply Voltage | 75-277V AC |
| Frequency Range | 50 / 60Hz 400Hz Option |
| Isolation | 4kV Isolation between power supply and input / output. Output is not isolated from input until the coil (M240-RCM) is connected. The coil provides isolation. |
Outputs
DC mA:
| 0-1mA | <12 kOhm |
| 0-5mA | <2.4 KOhm |
| 0-10mA | <1.2 kOhm |
| 0-20mA | <600 Ohm |
| 4-20mA | <600 Ohm |
AC Volts: 0-333mV AC
General
| Ambient Temp | -20 to + 70°C |
| Relative Humidity | 95% |
| Housing | UL94V0 |
| Mounting | Din Rail (35mm) |
| Accuracy | 1% Over measurement range |
| Cut off | 10A on lowest range |
| Minimum Full Span Range | 100A |
Indicator
| Power Supply | Green LED |
Connection Diagram
Ordering Information
If the requirement is for a nominal current to equal a nominal output, please state current after order code.
For example, if the requirement was a 4-20mA for 800A input, the order code would be as follows
M250-TRC-A5-H5-W2-P1 800A
Case
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