ABB HF Series, Manual

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28
E LEC TRON I C COM PAC T STA RTE R
| M A N UA L
Phases LED
visualization Signal relay Power path
switch off
L1 L2 L3
I
L
>= I
min
I
L
>= I
min
I
L
>= I
min
I
L
< I
min
I
L
< I
min
I
L
< I
min
 
I
L
< I
min
I
L
< I
min
I
L
>= I
min
 
I
L
< I
min
I
L
>= I
min
I
L
< I
min
 
I
L
>= I
min
I
L
< I
min
I
L
< I
min
 
I
L
>= I
min
I
L
>= I
min
I
L
< I
min
  
I
L
< I
min
I
L
>= I
min
I
L
>= I
min
  
I
L
>= I
min
I
L
< I
min
I
L
>= I
min
  
—
4.2
Phase asymmetry
The electronic compact starter protects 3-phase motors against phase asymmetry. The motor currents are measured at
phases L1 and L3 and monitored for symmetry.
• In the event of a deviation of the current in L1 and L3 by
≥
33 % the motor shuts down after two minutes. The cause of the
trip is indicated by the LEDs. The switchover contact switches: the N/O (96-97) contact closes or the N/C (96-95) opens.
• In the event of a deviation of the current in L1 and L3 by
≥
67% (e.g., phase failure), the motor shuts down after 1.8 seconds
and the cause of the trip is indicated by the LEDs. The switchover contact switches: the N/O (96-97) contact closes or the
N/C (96-95) opens.
The LED indications are as follows: The PWR LED is switched on continuously, the ERR LED flashes. All other LED: Iadj and ON
(DOL- and DOLE–devices) and L and R (ROL- and ROLE–devices) are switched off.
HF9-R-24VDC has no phase asymmetry and overload protection integrated.
Example:
Manual error acknowledgment after phase asymmetry tripping.
The device can be manually reset in two different ways: by pressing the reset button in front of the device; or remotely with a
push button.
• Pressing the manual reset button
Press the reset button on the front of the device. By pressing the reset button for more than two sec., the device returns to
the error state. Pressing the reset button for more than six sec. activates the device’s "parameterization" mode.
• Pressing a remote manual reset push button
Connect a push button (N/O contact) between the MAN and RES terminals.
An acknowledgement is triggered as soon as a positive edge is detected at the MAN input. If no negative edge is detected
after approximately two sec., the device adopts an error state since manipulation or an error in the acknowledgment circuit
may have occurred.
—
4.3
Phase failure
The electronic compact starter protects 3-phase motors against phase failure and prevents excessive temperature increases
in double phasing if phase failure occurs. Phase failure is detected through current measurements while the motor is
running. When phase failure occurs, the motor starter switches off the motor after 1.5-2 sec.. Phase failure is indicated by
the LEDs and the signaling relay, as shown in table 9.
I
L
= load current; I
min
= minimal load current
Table 9 Under current and phase failure