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Instructional Literature
Page
170
Effective: May 2008
Instructions for the FP-6000 Protective Relay
For more information visit: www.eaton.com
IB02602004E
The AR Lockout Flag has the following bits:
AR_Ext_Inc_Shot_flag:
External increment shot.
AR_Fail_Lockout_flag:
AR timeout.
AR_Shot_4_Lockout_flag:
Exceeding maximum shot.
AR_Shot_3_Lockout_flag:
Shot 3 programmable lockout
logic gate active.
AR_Shot_2_Lockout_flag:
Shot 2 programmable lockout
logic gate active.
AR_Shot_1_Lockout_flag:
Shot 1 programmable lockout
logic gate active.
AR_Bkr_FlashOver_flag:
Breaker flashover.
AR_AntiPumping_flag:
Breaker pumping.
AR_Bkr_Not_Enough
_Capacity_flag:
Not enough breaking capacity.
AR_Bkr_Wear_Lockout_flag: Exceeding breaker wear lockout
level.
AR_PLC_Lockout_flag:
General programmable lockout
logic gate active.
AR_Ext_Lockout_flag:
External lockout signal active.
AR_Shot_Per_Hour_flag:
Exceeding shots per hour limit.
The AR Block Flag has the following bits:
AR_ManualClose_Block_flg:
Manual/remote closing block.
AR_Bkr_Faulire_flg:
Breaker failure.
AR_79UV_Block_flg:
Undervoltage blocking.
AR_PLC_Block_flg:
General programmable block
logic gate active.
AR_Ext_Block_flg:
External block signal active.
The status of these flags can be found under Status. The AR
operation flag indicates the AR logic overall operation status
while lockout and block flags reveal more details of the lockout
and blocking conditions. The trip log includes the AR operation
flags.
The AR may generate the following events:
•
Auto Close
•
AR Lockout
•
Anti-pumping condition
•
Reset Lockout.
The following autoreclose states are added to the control options
that can be used as logic inputs for any programmable logic
gates:
•
AR_Run
•
AR_Lock
•
AR_SH1
•
AR_SH2
•
AR_SH3
•
AR_SH4
•
AR_Blocked
•
AR_Fail
•
Anti_Pump.
8.13 Thermal Protection and Alarm
The FP-6000 provides the thermal protections and alarms that are
based on the direct temperature measurement through the URTD
device offered by Eaton Corporation and the thermal model that
is similar to the MP-3000 motor relay. The RTD-based direct
temperature trips and alarms are independent of the thermal
model, while the thermal model can work with or without the
URTD. Without the URTD, meaning the URTD is not connected to
the FP-6000 or it is connected but not having it configured for the
thermal protection trips, the thermal model protection (49M) will
be solely based on ten settings. These settings are:
1.
Full Load Ampere (FLA)
2.
Locked Rotor Current (LRC)
3.
Maximum Allowable Stall Time (Tc)
4.
Service Factor (SF)
5.
Maximum Rotor Temperature Rise Over Ambient
6.
Normal Ambient
7.
Cooling Time Constant
8.
Current Threshold (Ith)
9.
Thermal Threshold (Tth)
10. Trip Delay
The first four settings dictate the maximum allowable thermal
limit curve of the protected equipment, and the last three settings
define the thermal trip curve relative to the thermal limit curve.
The rest of the settings are used for cooing or damping.
Mathematically, the thermal limit curve can be expressed as the
following:
If the trip current threshold is different from (
SF
•
FLA
) and the
thermal trip threshold is below the maximum thermal capacity,
the thermal trip curve can be expressed as the following:
If Ith and Tth are set to 100%, the trip curve will be the same as
thermal limit curve. The MP-3000 motor relay does not
distinguish between these two curves. If the user wants to the
FP-6000 relay to achieve the same thermal protection result as in
the MP-3000, one can simply set both Ith and Tth to 100%. If the
user does not want an extra trip delay over the trip curve, it can
be set to zero.
FLA
SF
I
when
I
T
I
TripTime
ef
ef
LR
LR
!
,
2
2
FLA
SF
I
when
I
T
I
TripTime
ef
ef
LR
LR
!
,
2
2
FLA
Ith
I
when
I
T
I
Tth
TripTime
ef
ef
LR
LR
!
,
2
2