2
TB MRIK3 12.00 E
Contents
1 Introduction and application
2 Features and characteristics
3 Design
3.1
Connections
3.1.1
Analog input circuits
3.1.2
AR Information input circuits
3.1.3
Blocking input
3.1.4
External reset input
3.1.5
Output relays of
MRIK3
relays
3.1.6
Fault recorder
3.2
LEDs
3.2.1
Indication-LEDs
3.2.2
Setting-LEDs
3.3
Low/High range of signal inputs
4 Working principle
4.1
Analog circuits
4.2
Digital circuits
4.3
Status descriptions
4.3.1
"Inactive"
4.3.2
"Reclaim time" tR
4.3.3
"AR-ready"
4.3.4
"AR-starting" (dead time)
4.3.5
"AR-cycle" (auto reclosing)
4.3.6
"AR-blocked"
4.3.7
"Fast Trip Mode"
4.3.8
Blocking mode
4.3.9
Activating of AR
4.4
Description of the status transition
4.5
Functional sequence
4.5.1
Switching-on
MRIK3
4.5.2
Circuit breaker manual closing
4.5.3
Circuit breaker manual open
4.5.4
Starting AR
4.5.5
Unsuccessful reclosing
4.5.6
Successful reclosing
4.5.7
Repeated reclosing
4.5.8
Supervision of the circuit breaker ready
information
4.5.9
External blocking
4.6
Time sequence diagrams of
MRIK3
4.6.1
The unit is programmed for two shots,
successful AR at the second shot
4.6.2
The unit is programmed for two shots,
unsuccessful AR
4.6.3
Manual closing of the circuit breaker to
faulty lines
4.6.4
Unsuccessful AR
5 Operations and settings
5.1
Display
5.2
Setting procedure
5.3
Systemparameter
5.3.1
Display of measuring values as primary
quantities (I
prim
phase)
5.3.2
Display of earth current as primary
quantity (I
prim
earth)
5.3.3
Nominal frequency
5.3.4
Display of the activation storage
(FLSH/NOFL)
5.3.5
Parameterswitch/external triggering of
the fault recorder
5.4
Parameter protection
5.4.1
Pickup current for phase overcurrent
element (I>)
5.4.2
Time current characteristics for phase
overcurrent element (I> + CHAR)
5.4.3
Trip delay or time multiplier for phase
overcurrent element (t
I>
)
5.4.4
Reset setting for inverse time tripping
characteristics in the phase current path
5.4.5
Current setting for high set element (I>>)
5.4.6
Trip delay for high set element (t
I>>
)
5.4.7
Pickup current for earth fault element (I
E>
)
5.4.8
WARN/TRIP changeover
5.4.9
Time current characteristics for earth fault
element (CHAR I
E
)
5.4.10
Trip delay or time multiplier for earth fault
element (t
IE>>
)
5.4.11
Current setting for high set element of
earth fault supervision (I
E>>
)
5.4.12
Trip delay for high set element of earth
fault supervision (t
IE>>
)
5.4.13
Parameters auto reclosing Number of
AR-SHOTS
5.4.14
Fault time (t
F
)
5.4.15
Dead time (t
D
)
5.4.16
Close impulse time (t
CI
)
5.4.17
Reclaim time (t
R
)
5.4.18
Fault time activation
5.4.19
Block/Trip - time
5.4.20
Circuit breaker failure protection t
CBFP
5.4.21
Adjustment of the slave address
5.4.22
Setting of Baud-rate (applies for Modbus
Protocol only)
5.4.23
Setting of parity (applies for Modbus
Protocol only)
