Schneider Electric 3BZ2, iFBZ, FBZ2, EOCR-i3BZ manual Protection functions, Auxillary functions

EOCR-i3BZ/iFBZ/3BZ2/FBZ2

EOCR-i3BZ / iFBZ : Intelligent Digital Over-Current, Earth Fault Relay with built-in ZCT,

EOCR-3BZ2 / FBZ2 : Economic Digital Over-Current, Earth Fault Relay with built-in ZCT

Protection functions

Item	Operating Condition & Setting Range	Operation Time
Over Current (oc)	Load current(In) exceeds threshold(Is)	Definite(Def) : 0.2~30s Adjustable
	Setting Range : 0.5~80A(Def), 0.5~32A(Inv & th)	Inverse(Inv) & Thermal(th) : 1~30 Class
Under Current (uc)	Load current(In) less than threshold(uc) In <= uc	oFF, 1~30s Adjustable
	uc should be less than oc Setting
Phase Loss (PL)	max imbalance is more than 85% among 3 phase current,	oFF, 0.5~5s Adjustable
	Enable or disable : Selectable
Reverse Phase(rP)	Reversed phase sequence input on EOCR.	Within 0.15s
	Enable or disable : Selectable
	Active only in motor starting, In ≥ Stall threshold (Sc×OC).
Stall (Sc)	Setting Range : Adjustable	Immediately after D-Time elapsed
	2~8 times of oc setting if Sc×OC doesn’t exceed 250A
	Active only in motor running, In ≥ Jam threshold (JA×OC).
Jam (JA)	Setting Range :	0.2~10s Adjustable
	1.5~8 times of oc setting if JA×OC doesn’t exceed 250A
	Current unbalance ≥ threshold1~10s Adjustable.
Unbalance (ub)	Setting Range : 10~50%	1~10s Adjustable
	Unbalance[%] = 100 × (Max phase current - Min phase current)/
	Max phase current
Earth Fault (EF)	EF current(Ie) exceeds threshold(Ies)	0.1~10s Adjustable
	Setting Range : oFF, 0.03~10A

Auxillary functions

Password	Secure configuration, available only with i3BZ/iFBZ
Communication	Serial network communication for monitoring of metering, status, and fault history
Fail Safe	Enable/Disable fail-safe operation of OL trip output
Phase selection	Select a Single-phase motor or 3-Phase motor
Total Running-Hour	Record of total running from installation which cannot be modified or cleared
Running-Hour	Accumulated running hour from preset point which can be cleared to zero, when motor stops
Fault History	Records for recent 3 faults each phase current which stored in a non-volatile memory
Limitation of autoreset attempt	Block auto-reset if the reset count exceeds the pre-set count within 30 minutes

Communication function (Applicable to i3BZ/iFBZ)

Item	Setting	Remark
Protocol type	Modbus RTU
Communication type	RS-485
Baud rate	1.2, 2.4, 4.8, 9.6, 19.2, 38.4 kbps
Maximum length of the bus	Maximum 1.2kM	Depend on the environment
Type of trunk cable	RS-485 Shielded Twist 2-Pair Cable

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