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79 • Motor and Soft Starter Protection
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8.1.6
UNDER/NO VOLTAGE
Trips the HRVS-DN when line voltage drops below the preset level for the preset time.
When voltage drops to zero, the HRVS-DN trips immediately with no delay.
Check UNDERVOLT. TRIP and UNDERVOLT. DELAY settings, check line voltages on L1, L2, L3.
For protection parameter settings refer to section
7.8.2 page 55.
8.1.7
OVER VOLTAGE
Trips the HRVS-DN when line voltage increases above the preset level for the preset time.
Check OVERVOLT. TRIP and OVERVOLT. DELAY settings, check line voltages on L1, L2, L3.
For protection parameter settings refer to section
7.8.2 page 55.
8.1.8
LONG START TIME
Trips the HRVS-DN if output voltage does not reach nominal at the preset MAX. START TIME.
Check FLA, FLC and MAX. START TIME settings. Increase INITIAL VOLTAGE, CURRENT LIMIT & MAX.
START TIME or decrease ACC. TIME as necessary.
For parameter settings refer to section
7.8.3 page 60.
8.1.9
OPEN BYPASS
Operates when the Bypass Contactor does not close after the EOA contact of the HRVS-DN closes.
Note
: This protection can be disabled by setting BY PASS OPEN TRIP to DISABLE when the Bypass is
connected in a separate cabinet, in a configuration where the starter CTs do not measure motor current while
the Bypass Contactor is closed.
For parameter settings refer to section
7.8.6 page 71.
8.1.10
SET CURVE TO 0
Trip occurs if the Soft Starter starts with a non-adequate starting curve to the network.
Change start and stop parameter to SOFT START CURVE 0 and try again.
For parameter settings refer to section
7.8.3 page 60.
8.1.11
PWR ON & NO STRT
Operates upon main voltage connection and activated while mains voltage is connected to the HRVS-DN for
more than 30 seconds without a start signal.
Note
: This protection can be disabled by setting PWR ON & NO STRT to DISABLE. Do not set to DISABLE
before you consult the factory!
Reset the fault, and initiate the start command within less than 30 seconds after mains voltage is applied to
L1, L2 and L3.
8.1.12
MOTOR INSULATION
(Optional) Trips the HRVS-DN when the motor insulation level decreases below the trip level set.
Check motor and cable insulation level.
For INSULATION ALARM/TRIP protection settings refer to section
7.8.6 page 71.
8.1.13
PHASE SEQUENCE
Trips the HRVS-DN if line phase sequence is wrong.
The HRVS-DN can be operated in any phase sequence as set in the PHASE SEQUENCE protection of the
soft starter.