96 • Commissioning and Operation Manual
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Control voltage
is supplied via customer terminals number 1 & 2.
L.S. 1
is a limit switch that control the internal lighting fixture and signal to external control system (via
terminal 42 & 44) that medium voltage door is opened. Customer can trip the incoming circuit breaker
to disconnect medium voltage from the input bus bars of the cabinet for safety.
H
is a heater to avoid humidity in the cabinet.
ES1
is a N.C. emergency stop push button mounted on the front of the low voltage compartment door.
Terminals 5 & 6
are for remote emergency stop N.C. push button. Customer can connect several N.C.
push buttons located in several locations in the plant. For example: near the motor and at the control
room.
L1-Line Contactor off (Red)
– indicates that Line Contactor is open. Mounted on the front of the low
voltage compartment door.
L2-Line Contactor on (Green)
– indicates that Line Contactor is closed. Mounted on the front of the
low voltage compartment door.
L3-Bypass Contactor on (Green)
– indicates that Bypass Contactor is closed. Mounted on the front
of the low voltage compartment door.
L4-Fault (Red)
– indicates that the soft starter tripped either because of a fault indicated by the Control
Module or from an internal motor protection or an external motor protection indication via customer
terminals 17 & 18. Mounted on the front of the low voltage compartment door.
C1
is the Line Contactor. Mounted in the medium voltage compartment.
RC1
is an interposing relay to enable more contacts representing the position of the Line Contactor.
FT & FT/1
are the fault relays. The relays are energized in normal operation and de-energized upon
fault indicated by the Control Module or from an external motor protection indication via customer
terminals 17 & 18.
C2
is the Bypass Contactor. Mounted in the medium voltage compartment.
S1
is a selector switch for DOL/Soft Start by the user.
When set to DOL:
o
Energizes the Bypass Contactor C2
o
Disconnects control voltage from the Control Module thus avoiding soft start and avoiding the
Control Module to trip the motor in case of a fault.
Note that external motor protection relays (if exist) will stay in operation and protect the motor.
When set to Soft Start:
o
Bypass Contactor C2 is energized via the control circuitry.
o
The Control Module is powered from the Control voltage and the Control module is controlling
the starting process and protecting the motor.
FR –
is the firing relay controlled by the Control Module to energize the firing transformer (TR1 in the
diagram).
The firing transformer energizes the power supply PCBs which feed the firing PCBs in the Power
Section. This is required only during soft start and soft stop periods
o
The firing transformer applicable in 115VAC, 230VAC control voltage. See different wiring of
TR1 transformer for 115VAC and 230VAC
o
In 220VDC control voltage a power supply (not shown in the diagram) is controlled by the FR
relay
o
In 110VDC and 125VDC the FR relay energize a power contactor that feeds the power supply
PCBs (not shown in the diagram)
Soft Starter
– is the HRVS-DN Control Module.
K1
– Is an interposing relay controlled by the internal IMMEDIATE relay of the HRVS-DN.
Controlled by terminal 10 of the Control Module. The relay Energized when starter is in any condition
except for stop and de-energized at stop. Its Normally Open contact is used in series with RC1 contact
to hold the Line Contactor C1 energized at the soft stop process.
K3
– Is an interposing relay controlled by the internal FAULT relay of the HRVS-DN.
Controlled by terminal 13 of the Control Module. Energized only when starter trips for fault. The
normally closed contact is connected in series with the N.C. trip contact of the optional motor
protection relay (MPR).
K2
– Is an interposing relay controlled by the internal END OF ACCELERATION relay of the HRVS-
DN. Controlled by terminal 16 of the Control Module. K2 is energized after the end of the starting
process to close the Bypass Contactor C2. K2 is de-energized upon Stop or Soft Stop commands or
upon Fault.
EPT-Rx
– Is the Electronic Potential Transformer – Receiver.
S2
- is a selector switch for Local/Remote/Comm./Off controlled by the user.
