Starter Selection
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The HRVS-DN is a highly sophisticated and reliable
starter designed for use with standard medium voltage
three-phase, three-wire, squirrel cage induction motors.
It provides the best method of reducing current and
torque during motor starting.
The HRVS-DN starts the motor by supplying a slowly
increasing voltage to the motor, providing soft start and
smooth acceleration, while drawing the minimum
current necessary to start the motor.
The second generation, microprocessor based digital
circuitry provides unique features like pump control,
accurate motor protection and optional analog output.
The optional RS485 Communication with MODBUS,
PROFIBUS and other (consult factory) protocols
enables full control (Start, Stop, Dual Adjust,
command, etc.) and supervision. Up to 32 starters or
other MODBUS slaves can be connected on a shield
twisted pair to a host computer.
Motor Current & Starting Conditions
Select the starter according to motor’s Full Load
Ampere (FLA) – as indicated on its nameplate (even if
the motor is not fully loaded).
The HRVS-DN is designed to operate under the
following conditions:
• Max. ambient temp: 50ºC
• Max. starting current: 400% motor’s FLA
• Max. starting time: 30 sec. (at 400% FLA)
• Max. starts per hour: 2 starts per hour at
maximum conditions.
PIV (Peak Inverse Voltage) Ratings
PIV Rating will be not less than:
System Voltage PIV Ratings
2300V 6900V
3300V 12500V
4160V 12500V
6600V 19500V
11000V 39000V
13800V 41000V
Main Voltage (line to line)
Thyristors PIV rating, internal circuitry and insulation
defines the following voltage levels:
2300V, 3300V, 4160V, 6000V, 6600V, 6900V,
11000V and 13800V.
Each starter is suitable for 50/60Hz.
Control Voltage
The Control voltage operates the electronic circuitry.
The following voltage levels are available:
• 220-240V + 10%-15%, 50/60 Hz (standard)
• 110-120V + 10%-15%, 50/60 Hz
• 110 VDC (optional)
• Consult factory for special voltages.
Control Inputs
Control Input voltage (start, stop, etc.) can be the same
as Control Supply above (standard), or 24-240V AC /
DC (by special order).
Options (see Ordering Information Data)
• Analog card - analog output (option # 5)
• Tachometer feedback (option # T)
• Relays card:
- enable to operate via communication.
- to get an up to speed signal when starting
synchronous motors if the by pass contactor is
close or In < 115% In
• Multi start configuration
• LLOYD’S approval for marine application
• Customized cabinet arrangement.
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