Protection; Block Diagram; Thermal Overload Protection - ABB REM 610 Technical Reference Manual

REM 610
4.1.4.
4.1.4.1.
4.1.4.2.
22
Motor Protection Relay
Technical Reference Manual
The functions of the relay are selected with the switches of switchgroups SGF, SGB,
SGR and SGL. The checksums of the switchgroups are found under SETTINGS in
the HMI menu. The functions of the switches are explained in detail in the
corresponding SG_ tables.

Protection

Block diagram

Switchgroups for
digital inputs
SGB1...5
Reset 1 3)
Reset 2 4)
Reset 3 5)
Setting group
DI1
Digital inputs
Time sync
DI2
EXT TRIP
DI3
EXT TRIG CBFP
Optional digital inputs
DI4
RESTART INH
(RTD module)
DI5
ER ST 2)
STALL 1)
BLOCK I>>
BLOCK I >
0
BLOCK I<
BLOCK I >
2
I
L1
I
L2
I
L3
Analogue inputs
I
0
RTD1/Th1
RTD2
Optional RTD inputs RTD3
(RTD module) RTD4/Th2
RTD5
RTD6
The dashed line indicates optional functionality.
1) Stall indication from speed switch
2) Emergency start
3) Clear indications by the digital input signal
4) Clear indications and unlatch output contacts by the
digital input signal
5) Reset indications and memorized values; unlatch output
contacts by the digital input signal
Fig. 4.1.4.1.-1 Block diagram

Thermal overload protection

The thermal overload protection detects short- and long-term overloads under
varying load conditions. The heating up of the motor follows an exponential curve,
the levelled-out value of which is determined by the squared value of the load
current.
Protection relay functions programmable LEDs
θ> 2 2
I t>, I t
s s
RESTART INH
ALARM
ER ST STALL START
AMB TEMP TRIP MOTOR ST TRIP
I >, I & t
Σt >
s s s s
I>> TRIP
I< TRIP
MOTOR ST
START
ER ST
RESTART INH STALL
TRIP
REV TRIP
I>> I >
0 ER ST
DI1
DI2
DI3
DOUBLE START START
DI4
BLOCK TRIP BLOCK TRIP
DI5
I< I
ThA> ALARM
ThA> TRIP
I
L1
ThB> ALARM
I
START
L2
ThB> TRIP
BLOCK I NPS
TRIP
L3
I > I
2 0
NPS START
BLOCK TRIP Io
REV REV
Motor start up
200 ms
NPS DOUBLE
MOTOR ST TRIP MOTOR ST
CBFP CBFP
RTD, T CTR, T
PO1
EXT TRIG
PO2
CTR1
Thermistor, Th
CTR2
CTR3
CTR4
Th1
CTR5
Th2 CTR6 AMB TEMP
Th1> Ta1...3>,
Tp1...3>
RESTART INH
2 s
Warning
ThA>ALARM
ThA> TRIP ER ST ThA>TRIP
Th2> Ta4...6>,
Tp4...6>
2 s
ThB> ALARM
ThB> TRIP ER ST
ThB> TRIP
SGF1...SGF5
Disturbance recorder
(4 analogue + up to 8 digital channels)
I I>> START
L 1
I > START
I
0
L 2
I I > START
L 3 2
I I< START
0
θ
> ALARM
DI1
θ
> TRIP
2
DI2
I t /I > TRIP
s s s
DI3
I>> TRIP
DI4
I > TRIP
DI5 0
I > TRIP
MOTOR ST
2
2
REV TRIP
I t /I > START
s s s
I< TRIP
1MRS 752263-MUM
Switchgroups for
SGL1...8
θ> ALARM
θ> TRIP
RESTART INH
MOTOR ST
2
I t /I > TRIP
s s s
LED1
LED2
I > TRIP
LED3
0
I > TRIP LED4 Programmable
2
LED5
LEDs
LED6
LED7
LED8
Switchgroups for
output contacts
SGR1...5
θ> ALARM
θ> TRIP
2
I t /I > START
s s s
2
I t /I > TRIP
s s s
I>> START
I>> TRIP
I< START
PO1
I< TRIP
PO2
I > START
0
PO3
I > TRIP
0
SO1
I > START
2 SO2
I > TRIP
2
REV TRIP
MOTOR ST
Digital outputs
EXT TRIP
(Output contacts)
ThA> ALARM
ThA> TRIP
ThB> ALARM
ThB> TRIP
IRF
IRF INDICATION IRF indication LED (green)
START/ALARM INDICATION Start/Alarm (yellow) and
TRIP INDICATION trip (red) indication LEDs
BlockDiagrREM610_b