The Sonel MRP-201 tests all varieties of residual current devices (RCDs), including direct, short-delay, and selective types across AC, A, and B categories. It measures tripping current and tripping time relative to differential current, resistance of the protective conductor, and contact voltage. It helps verify that residual-current protection functions correctly.
The device supports individual measurements, automatic test sequences, simultaneous current, and tripping time measurement in a single RCD activation. The MRP-201 has a dust-tight, waterproof IP67-rated housing and wireless communication. Analyse results and generate reports using the Sonel Reports PLUS software or store and print measurements using the Sonel Reader application.
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| Measurement Functions | Measurement Range | Display Range | Resolution | Accuracy |
|---|---|---|---|---|
| Measurements of RCD Parameters | ||||
| RCD tripping test and measurement of tripping time tA, measuring current 0.5 IΔn, 1 IΔn, 2 IΔn, 5 IΔn | ||||
| General and short-time delay RCD | 0 ms…300 ms | 0 ms…300 ms | 1 ms | ±(2% m.v. + 2 digits) |
| Selective RCD | 0 ms…500 ms | 0 ms…500 ms | 1 ms | ±(2% m.v. + 2 digits) |
| Measurement of RCD tripping current IA measuring current 0.15 IΔn…2.0 IΔn | ||||
| For sinusoidal residual current (AC type | 3.0 mA…500 mA | 3.0 mA…500 mA | from 0.1 mA | ±5% IΔn |
| For unidirectional residual current and unidirectional with the 6 mA DC bias (type A) | 1.5 mA…420 mA | 1.5 mA…420 mA | from0.1 mA | ±10% IΔn |
| For direct residual current (type B) | 2.0 mA…600 mA | 2.0 mA…600 mA | from 0.1 mA | ±10% IΔn |
| m.v. - measured value | ||||
| Voltage Measurement ⇒ Abbreviation "m.v." used in the specification of measurement uncertainty means a standard measured value. |
Range | Resolution | Accuracy | |
| 0.0 V... 299.9 V | 0.1 V | ±(2% m.v. + 6 digits) | ||
| 300 V...500 V | 1 V | ±(2% m.v. + 2 digits) | ||
| Frequency range: 45 Hz...65 Hz | ||||
| Frequency Measurement | 45.0 Hz...65.0 Hz | 0.1 Hz | ±(0.1% m.v. + 1 digit) | |
| Voltage range: 50 V... 500 V | ||||