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
3)
Reset1
4)
Reset 2
5)
Reset 3
Setting Group
DI1 Time sync
Digital inputs
DI2 EXT TRIP
DI3 EXT TRIP FAIL
Optional digital inputs
DI4 RESTART DISABLE
(RTD module)
2)
DI5 ER ST
1)
STALL
BLOCK 50P
BLOCK 51N
BLOCK 37
BLOCK 46
I
a
I
b
I
c
Analogue inputs
I n
RTD1/PTC1
RTD2
Optional RTD inputs RTD3
(RTD module) RTD4/PTC2
RTD5
RTD6
The dashed line indicates optional functionality.
1) Stall target from speed switch
2) Emergency start
3) Clear targets by the digital input signal
4) Clear targets and unlatch output contacts by the
digital input signal
5) Reset targets 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.
Switchgroups for programmable LEDs
Protection relay functions
I 2 t>,
49
2
49 ALARM
(48/14 PICKUP)
(48/14 TDLY) 49 TRIP
RESTART DISABLE
RESTART DISABLE
ALARM
ER ST STALL PICKUP
MOTOR ST
TRIP
AMB TEMP MOTOR ST TRIP
(48/14 PICKUP) 2 (48/14 TDLY)
66 (48/14 PICKUP), /(48/14) TRIP
(48/14 PICKUP)
50P PICKUP
& (48/14 TDLY)
50P TRIP
MOTOR ST
51N TRIP
PICKUP
ER ST
STALL TRIP 46 TRIP
RESTART DISABLE
46R TRIP
50P 51N
ER ST
DI1
DI2
DOUBLE PICKUP
PICKUP
DI3
BLOCK TRIP BLOCK TRIP
DI4
DI5
37
I
49/38-1 ALARM
I
49/38-1 TRIP
a
49/38-2 ALARM
I
b
PICKUP
49/38-2 TRIP
BLOCK TRIP I NPS
c
46 I n
Switchgroups for output contacts
49 ALARM
NPS PICKUP
I n 49 TRIP
BLOCK TRIP
(48/14 PICKUP)
46R Motor start up
/(48/14)
(48/14 PICKUP)
/(48/14) TRIP
NPS DOUBLE
50P PICKUP
MOTOR ST TRIP MOTOR ST
50P TRIP
37 PICKUP
TRIP FAIL RTD, T RTD, T
37 TRIP
51N PICKUP
51N TRIP
46 PICKUP
EXT TRIG
PO2
RTD1 46 TRIP
Thermistor,Th
RTD2 46R TRIP
RTD3 MOTOR ST
RTD4 EXT TRIP
PTC1 RTD5 49/38-1 ALARM
PTC2 RTD6 AMB TEMP 49/38-1 TRIP
49/38-2 ALARM
PTC1 RTD1...3A
49/38-2 TRIP
RTD1...3T
RESTART DISABLE
49/38-1 ALARM
49/38-1 TRIP
ER ST 49/38-1 TRIP
PTC2 RTD4...6A
RTD4...6T
IRF TARGET
49/38-2 ALARM
49/38-2 TRIP PICKUP/ALARM TARGET
ER ST 49/38-2TRIP
TRIP TARGET
SGF1...SGF5
Disturbance recorder
(4 analogue + up to 8 digital channels)
I a 50P PICKUP
I b 51N PICKUP
46 PICKUP
I c
37 PICKUP
I n
49 ALARM
DI1
49 TRIP
DI2
2
(48/14 PICKUP) (48/14 TDLY)
DI3
/(48/14) TRIP
DI4
50P TRIP
DI5
51N TRIP
MOTOR ST
46 TRIP
2
(48/14 PICKUP) (48/14 TDLY)
46R TRIP
/(48/14) PICKUP
37 TRIP
1MRS 755537
SGL1...8
Programmable
LEDs
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
SGR1...5
2
(48/14 TDLY)
PICKUP
Digital outputs
2
(48/14 TDLY)
(Output contacts)
PO1
PO2
PO3
SO1
SO2
IRF
IRF target LED (green)
PICKUP/Alarm(yellow)
and trip (red) target LEDs
BlockDiagrREM610_b