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ECD
(Earth Current Detector Relays)
The ECD is a ‘residual current’ device.
Equipment or distribution system fault current are measured
by passing the installation cables through an integral
core balance transformer (CBT). During normal operation,
outward and return currents at any instant are largely
balanced and the CBT output is zero or slightly above
zero. During earth fault conditions, outward and return
currents are not balanced: the net AC current causes
an output from the CBT; this output current is detected
and the trip relay operates. Note: DC fault currents
are NOT detected. |
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Download
DataSheet
Stock
code |
Supply
Voltage |
Nominal
trip current* |
Nominal
trip delay* |
Test
button |
Dimantion |
ECD.1201 |
110VAC |
10mA(fixed) |
20mS(fixed) |
Integral
or remote |
59X25X148
mm |
ECD.1202 |
240
VAC |
10
mA(fixed) |
20
mS(fixed) |
Integral
or remote |
59X25X148
mm |
ECD.1203 |
110
VAC |
30
mA(fixed) |
20
mS(fixed) |
Integral
or remote |
59X25X148
mm |
ECD.1204 |
240
VAC |
30
mA(fixed) |
20
mS(fixed) |
Integral
or remote |
59X25X148
mm |
ECD.1205 |
110
VAC |
300
mA(fixed) |
20
mS(fixed) |
Integral
or remote |
59X25X148
mm |
ECD.1206 |
240
VAC |
300
mA(fixed) |
20
mS(fixed) |
Integral
or remote |
59X25X148
mm |
|
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