Raritan PX3-4000 series, User Manual

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Appendix G: PX Models with Residual Current Monitoring
573
Compliance with IEC 62020
IEC 62020 is an international standard for Residual Current Monitors. All
PX with RCM are IEC 62020 compliant.
IEC 62020 uses the term
rated residual operating current
(I
Δ
n) to specify
residual current, equal to or above which causes an alarm. IEC 62020
recommends preferred values 6mA, 10mA, 30mA, 100mA, 300mA and
500mA. In the PX with RCM, I
Δ
n is specified using the Critical Rated
Residual Operating Current threshold.
Note: The PX triggers events when residual current values are above
(but not equal to) thresholds. For example, you would set the critical
threshold to 29mA to specify the IEC 62020 I
Δ
n of 30mA.
IEC 62020 uses the term
residual non-operating current
(I
Δ
no) to specify
residual current, below which does not cause an alarm. IEC 62020
specifies I
Δ
no be no higher than 0.5 I
Δ
n. In PX with RCM, I
Δ
no is set
using the RCM Deassertion Hysteresis and this value must be no higher
than 0.5 the RCM critical threshold.
PX with RCM allows you to establish an optional WARNING state, which
is not part of the IEC 62020 specification. PX RCM remains IEC 62020
compliant when the RCM deassertion hysteresis is configured properly.
IEC 62020 specification PX with RCM characteristics
Method of operation Dependent on line voltage. RCM only functions if
line voltage is present.
Type of installation PX with flexible line cords and plugs are for mobile
installation and corded connection.
Current paths 1-phase PX are two current paths RCM.
3-phase 3W+PE are three current paths RCM.
3-phase 4W+PE are four current paths RCM.
Ability to adjust residual
operating current
Adjustable.
Adjustable time delay Non-adjustable time delay.
Protection against external
influence
Enclosed-type RCM.
Method of mounting Panel board type RCM.
Method of connection Not associated with mechanical mounting.
Connection of load
conductors
Monitored line is directly connected.
Fault indicating means Visual, with other output signals.