EPA LEAKCOMP 1C, Инструкция по эксплуатации

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Function
LEAK COMP ® 1C www.leakcomp.de 18
of
34
4
Function
4.1 Functional description
Initial situation
There is an increasing use of RCDs for personal safety-and fire protection purposes. The
modern components used in automation technology (such as frequency inverters, RFI
filters, switching power supplies, shielded motor cables etc.) generate leakage currents
when the system is operating. These so-called "operational" leakage currents are
interpreted by the protective devices as differential currents and therefore often lead to
unreliable operating states in the residual current device or the complete shutdown of the
system. The residual current circuit breaker cannot distinguish between the operational
leakage currents and true fault currents.
Application
To prevent the unwanted tripping of the residual-current circuit breaker (RCCB), a device
is needed that can compensate for capacitive leakage currents with a frequency of 50 Hz.
The leakage current compensation device LEAK COMP ®
1C
was specially developed for
this purpose (compensation current selectable 5 or 11 mA). It is used in electrical systems
or machines in which (mostly single-phase) devices with an integrated EMC filter are
connected to residual current devices (RCDs) or residual current circuit breakers (RCCBs)
with rated residual currents of I
Δn
= 30 mA or higher (according to DIN VDE 0100- 530).
LEAK
COMP
®
1C
The LEAK COMP
®
1C compensates for operational leakage currents occurring in the
system/machine and thus prevents the inadvertent or unwanted tripping of RCDs caused
by excessively high 50 Hz leakage currents.
This functionality is available for all common RCCBs of the types A, F, B and B+ (short-
time delayed [STD] versions are recommended). The size of the 50-Hz-compensation
current is set at 5 mA and can be increased to 11 mA via a jumper. If the compensation
current is not sufficient to compensate for the leakage current, additional LEAK COMP ®
1C
devices can be connected in parallel.
The
LEAK
COMP
®
1C has two LED indicators.
The blue LED functions as the operating display and indicates the presence of the power
supply and fault-free operation.
The
red LED indicates a device fault. The following faults are detected:
•
Reversal of the phase and neutral conductors
•
Lack of protective earth conductor
•
High neutral conductor voltage