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The protective device can be configured for a JAM alarm and/or a JAM trip. There are two JAM elements:
JAM1 50J[1]; and
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JAM2 50J[2].
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They are located under the >>Protection Parma<< menu, under each setting group (Set 1 for example). It is suggested
to use 50J[1] for JAM trip, and 50J[2] for JAM alarm. Each can be disabled by entering the JAM setting menu and then
selecting "Inactive". It can also be blocked by various blocking elements set by the User under the >>Global Prot Par /
JAM<< menu. In the "Underload and JAM Trip Function" curve, the Trip settings are represented by two vertical lines,
both well above the normal load current. This curve also applies to JAM setting configured as an alarm. Be sure to set
the alarm level below the trip level.
Both trips and alarms are held off by the JAM Start Delay located under the >>Global Prot Para / Motor-start Start Delay
Timers<<. Use the start delay to block tripping and alarming until the motor current drops to continuous load level. Use
run delays to avoid nuisance alarms or trips for load transients.
To configure this function for operation under an alarm condition, the User must assign the functions pickup
[(50J[1].Pickup) for example] to an output relay, under >>Device Parm / Relay Outs<< that the User has identified as
the Alarm relay output. Likewise, to illuminate an LED under a functions alarm condition, LED2 must be assigned the
functions pickup. Several elements are configure as such at the factory for convenience.
EMR-4000
www.eaton.com
IM02602009E
448
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