ABB REF601 CEI - Page 28

1MDU07205-YN rev. F
REF601 CEI
User’s manual
28
Protection Functions
1). Generate Trip
Cmd output pulse.
2). Generate Breaker
Open output pulse.
Protection
Start
1). Eventlog/Datalog
Capture.
2). LCD, LED,
signaling contacts
(Ip,Io) enabled.
Trip1 occurs
here
Minimum 200ms Trip Time
50
200
Save Relay status
(Phase tripped or
Earth Tripped] to
EEPROM
t (mS)
1). Reset protection
counters.
2). Start protection if
current > threshold.
3). Continue with latch
condition as set by Trip1.
70
Relay retains trip till fault Lasts
Fig.5 – Trip contact Management
Note: In case of fault current persist for longer duration, Trip pulse duration follows the fault current
External control command inputs (Remote open and Reset
input)
REF601 supports the external control command voltage inputs too, with wide
voltage band of 24V-240V AC/DC input.
Applying a valid voltage input (appropriate input for at least 100ms) to Remote
opening command terminal (XK4.1 – XK4.2), will generate a trip command direct-
ly irrespective of current fl owing in system. However the remote opening com-
mand can be blocked through menu and in such cases it cannot be operated
neither through a valid voltage nor through Modbus communication. By applying
the proper voltage input to Reset input terminals (XK4.3–XK4.4), will reset all the
Breaker control command inputs
REF601 supports the Breaker control command voltage inputs (Breaker open and
Breaker Close) with wide voltage range of 24V-240V AC/DC input. This breaker
commands can also be given by push buttons given on front plate of REF601.
Applying a valid voltage input (appropriate input for at least 100ms) to “Breaker
open” input terminals (XK1.3 – XK1.4), will generate a trip command directly ir-
respective of current fl owing in system. It also generations “breaker open” output
(XK2.9 – XK2.10) i.e. contacts becomes NC for 200mSec. While by applying the
proper voltage input to “Breaker close” input terminals (XK1.1–XK1.2) will generates
“breaker close” output (XK2.7 – XK2.8) i.e. contacts becomes close for 200mSec.
The difference between Remote opening command and Breaker open is that Re-
mote opening function can be blocked, moreover when remote opening is activated
the message “Remote Trip Activated” is displayed on the LCD.
4.5.1
4.5.2