FUNCTION CHARACTERISTICS
63
NVA100X-D - Manual - 02 - 2016
Speed control
The input allows to acquire the rotor state (running or not running).
Motor restart
During the time that the motor starts, the current is near the blocked rotor value, but the condition is
not managed because the measured current goes never off (or however down to IRUN=0.1 I
B
).
If a binary input is set as “Motor restart” and the parameter of the timers reset is enabled for all
protection elements inside CLP (MR Enable ON)
[1]
inside the Starting control set menu), the timers
restart when the binary input become active.
Reset N/T start
The input activation make a reset of the number of starts and the start of cumulative time (Motor start
inhibit element - 66).
Reset P-RMT
The operation time of motor is cleared when the binary input become active (Partial counter).
Reset T-RMT
The operation time of motor is cleared when the binary input become active (Total counter).
Note 1 For generator protection the MR Enable parameter must be disabled (OFF)
Speed-switch
Speed control
UAUX
UAUX
Speed control
Binary input INx
INx
T0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOF F
INx
t
OFF
Speed switch
M
3 ~
51LR
Speed-switch
Speed control
UAUX
UAUX
Speed control
Binary input INx
INx
T0
INx
t
ON
T0
n.o.
n.c.
INx tON
Logic
INx tOF F
INx
t
OFF
Speed switch
M
3 ~
51LR
Timers restarting (CLP thresholds on speedup)
riaccelerazione.ai
&
Starting control
CLP source
MR Enable
CB-State
I
RUN
=0.1
I
B
Max[I
L1...
I
L3
]
≥
I
RUN
I
L1...
I
L3
Output t
CLP
t
CLP
Max[I
L1...
I
L3
]
≥
I
RUN
Max[I
L1...
I
L3
]
≥
I
RUN
Max[I
L1...
I
L3
]
<
I
RUN
Starting
control
Starting detection
Reset CLP timer
CB State
Restart
CB OPEN CB CLOSED CB CLOSEDCB OPEN
t
I
RUN
t
CLP
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK UNBLOCK UNBLOCK
HIGH THRESHOLD/
BLOCK
HIGH THRESHOLD/
BLOCK
+UAUX
-UAUX
Motor restart
Binary input INx
T0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
0
n.o.
n.c.
INx
t
OFF
Motor restart
LOW TH. LOW TH.
Timers restarting (CLP thresholds on speedup)
riaccelerazione.ai
&
Starting control
CLP source
MR Enable
CB-State
I
RUN
=0.1
I
B
Max[I
L1...
I
L3
]
≥
I
RUN
I
L1...
I
L3
Output t
CLP
t
CLP
Max[I
L1...
I
L3
]
≥
I
RUN
Max[I
L1...
I
L3
]
≥
I
RUN
Max[I
L1...
I
L3
]
<
I
RUN
Starting
control
Starting detection
Reset CLP timer
CB State
Restart
CB OPEN CB CLOSED CB CLOSEDCB OPEN
t
I
RUN
t
CLP
0.1 s
HIGH THRESHOLD/
BLOCK
LOW THRESHOLD/
UNBLOCK UNBLOCK UNBLOCK
HIGH THRESHOLD/
BLOCK
HIGH THRESHOLD/
BLOCK
+UAUX
-UAUX
Motor restart
Binary input INx
T0
Logic
INx
t
ON
INx
t
ON
INx
t
OFF
0
n.o.
n.c.
INx
t
OFF
Motor restart
LOW TH. LOW TH.
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