AEG ME09 Installation, Operation And Maintenance Manual page 46

2.2.3.3.1 (HSIOC)
2.7 MCR
MRC
ME 50M to ME 64M
2.2.3.4 (MCR)
2.2-04
INTRO BREAKER
TRIP UNIT
(rms)
100.000 A
LOCKS ACCESSORIES
2.2.3.3.1 High Set Instantaneous Protec on (HSIOC)
HSIOC is also Known as Override Pickup. The trip units used in
ME09 circuit breakers are provided with an override
instantaneous trip:
-- The HSIOC se ng is normally set at 107% of the circuit
breaker Icw ra ng when the adjustable selec ve instantaneous
is set to ON.
-- If the adjustable selec ve instantaneous is set to OFF then the
HSIOC nominal pick up is reduced to 98% of the circuit breaker's
Icw and, considering tolerance, the minimum pickup reacts at
91% of the circuit breaker's Icw value.
Table 2.7: Installed MCR devices and their se ngs
Overview of installed MRC
devices in Automa c types :
Envelope 3
ME 50M to ME 64M
2.2.3.4 Making Current Release (MCR)
Every ME09 circuit breaker uses a making current release that is
speci cally designed to prevent damage to the circuit breaker
when it closed on a fault.
The making current release value varies per circuit breaker
envelope and is related to the circuit breaker's close and latch
ra ng as indicated in table 2.7
The MCR pickup is ac vated at the me the circuit breaker
closes and for six cycles therea er. When the six cycles are over,
the threshold changes to the HSIOC pickup se ng.
TESTS APPENDIX
Set value (rms)
100.000 A