Balboa Water Group BP 50Hz - Manual (Page 17)

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Manufactured under one or more of these patents. U.S. Patents: 5332944, 5361215, 5550753, 5559720, 5,883,459, 6253227, 6282370, 6590188, 6976052, 6965815, 7030343, 7,417, 834 b2,
Canadian Patent: 2342614, Australian patent: 2373248 other patents both foreign and domestic applied for and pending. All material copyright of Balboa Water Group.
42217B
Two Pole RCD
Four Pole RCD
A residual current device (RCD,) is the generic term for a
device that monitors the current in the line conductor and the
neutral conductor of a circuit in an earthed system.
In a circuit that’s operating properly, the vector sum of the
live and neutral current values added together will be zero.
Current flowing to earth, due to a line earth fault, will return
via the earth conductor, and regardless of load conditions,
will be registered as a fault. This current flow will give rise to
a residual current that will be detected by the device. If the
residual current exceeds the rated sensitivity of the RCD, it
will automatically activate a tripping of the faulty circuit.
Typical specifications are as follows:
Residual Current Devices ( RCD’s ) range
Sensitivity - from 10 to 500mA
Voltage - 2 poles : 230V; 3/4 poles: 230/400V
Connection capacity
- 25A: 6/10 mm² (flexible/ rigid cable)
- 40,60A: 16/25 mm²
- 80,100A: 35/50 mm²
230 Volt 50 Hz - Residual Current Devices (RCD’s)