Download Micrologic - Schneider Electric

Leds and display screens
Overview of functions
b Fault-trip LEDs
b The LEDs indicate the type of fault that tripped the circuit breaker
b The LEDs are located in the upper part of the front panel (red Ir, Isd, Ii, Ig, I2n and
Ap LEDs)
b When activated, a LED remains ON until it is locally reset.
A number of simultaneous causes may result in
tripping. For example, a short-circuit and a distributionsystem voltage under a set value.
The LED signalling the last fault chronologically is the
only one to remain ON. E.g., the Ap LED may signal a
voltage drop under a set value where the voltage drop
was caused by a short-circuit.
b Isd, Ii led
E60338B
Micrologic 5.0 P
Micrologic 5.0 P
Signals tripping following
overrun of the long-time
current setting Ir.
Signals tripping following
overrun of the short-time
pickup Isd or the
instantaneous pickup Ii.
b Ig, I∆n led
b Ap led
Micrologic 5.0 P
Signals tripping following
overrun of the groundfault pickup Ig or the
earth-leakage pickup I∆n.
E60340B
The self-protection function (excessive temperature,
fault detected in ASIC power supply or instantaneous
self-protection built into the device) trips the circuit
breaker and turns the Ap LED on.
E60339B
E60337B
b Ir led
Micrologic 5.0 P
Signals tripping due to:
b Self-protection function:
v temperature
v ASIC power supply
v instantaneous pickup for circuit-breaker self
protection
b Protection functions:
v current unbalance I unbal
v maximum current I1 max, I2 max, I3 max, IN max;
v voltage unbalance U unbal
v maximum voltage U max
v minimum voltage U min
v reverse power rP max
v maximum frequency F max
v minimum frequency F min.
E60485A
b LEDs on buttons to access the menus
The activated LED indicates the menu for which the screen is displayed:
v "Metering"
v "History, maintenance and setup"
v "Protection".
04443726AA - 09/2009
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