www.hubbell-icd.com
PROTORQ
™
4960
SERIES
HUBBELL INDUSTRIAL DRIVES
for Crane Control
Dedicated AC Drives for Crane Applications
Hubbell Protorq’s crane control program brings a series of
functions to the hoist, trolley and long-travel movements of
cranes.
Rated:
208-240 VAC, 4.4 to 260A (0.75 to 150 HP)
380-500 VAC, 1.7 to 1274A (0.75 to 1000 HP)
525-690 VAC, 6.1 to 2421A (5 to 2500 HP)
Eliminating the need for an external PLC, the program
incorporates all the functions commonly required in crane
applications and enables stepless speed and torque
control in:
− Industrial cranes
− Harbor cranes
− Tower cranes
− Marine and deck cranes
A key feature of the Hubbell Protorq
™
industrial drive is its
motor control platform, direct torque control (DTC). DTC
enables the drive to achieve full torque at zero speed with
or without the need for a encoder feedback. In addition, the
torque response of the drive is fast which means the crane
can react quickly to changes in movement commands.
High torque levels can be reached, making the drive ideal
for lifting operations. DTC delivers enhanced operational
safety and accurate slow speed control.
Hubbell Protorq
™
industrial drives’ built-in brake choppers
connect the DC bus voltage to an external dynamic
breaking resistor, where the braking energy is converted to
heat.
Low harmonic drives help to maintain power supply quality
and meet the strictest harmonic standards without any
need for ltering equipment.
The drive can work in either standalone mode or as a
master follower.
Optional Regenerative Drive Solutions
Regenerative drives can recover energy from a process
and feed it back into the network, thus saving energy.
This single drive is a compact and complete regenerative
drive solutions, with everything needed for a regenerative
operation.
With regenerative functionality, the braking energy of the
motor is returned back to the drive and distributed forward
to the supply network. No need for external dynamic
breaking resistor.
Removable Memory Unit
The removable memory unit stores the software
that includes user settings, parameter settings
and motor data. Situated on the control unit,
the memory unit can easily be removed for
maintenance, rmware updates or replacement
purposes. This common type of memory unit is
used throughout the 4960 Series.
System parameters and motor data can also be uploaded
to the HMI. The HMI can be removed and reinstalled in a
new drive with the same system parameters.
Flexible Control Platform
The Hubbell Protorq
™
rmware offers exible interfaces for
different types of analog, digital or eldbus systems,
enabling a wide range of connectivity for start, stop and
reference change signals.
Analog Signal: 0-10 VDC, 4-20mA, +10 VDC
Network communication modules available: Probus,
Pronet, CANopen, DeviceNet, Ethernet/IP, Modbus RTU,
Powerlink and ControlNet.
Mechanical Brake Control & Torque Memory
The crane control program features an integrated brake
control logic that utilizes torque memory and pre-
magnetizing to open and close the mechanical brake
safely and reliably. The drive can generate full torque on
the motor shaft before the brake is released. In addition,
brake status feedback signals improve the safety when a
start or stop command is given.
Adaptive Programming
Function block programming - included as standard - is like
having a small PLC inside the drive. Adaptive
programming, as it is also called, enables the user to
integrate external control logic or create new functions, so
the program can be customized quickly and easily.
Load Speed Control
Load speed control maximizes the hoist speed for the
given load and ensures that there is sufcient motor torque
in the eld weakening area. This minimizes operating time
and optimizes crane capacity.
Safety Control
The ‘slow down’ safety control function limits the speed to
a preset level in critical zones. High and low limit sensors
stop the drive at the end positions. The ‘fast stop’ safety
control function is used in emergency situations.
Speed Monitor and Speed Matching
The speed monitor function ensures that the crane motor
speed remains within safe limits to prevent over speed.
The speed matching function continuously compares
the speed reference and the actual motor shaft speed to
detect any possible difference. One of these functions will
stop the motor immediately if a fault should occur in the
operation of the motor.
Retrot Older Wound Rotor Motors
Hubbell 4960 Drive circuit incorporates a special dv/dt lter
that allows the older existing motors to be used with the
new drives. No need for costly motor replacement.
Crane System Check
The crane system check function includes both electrical
and mechanical checks. Torque proving ensures that the
drive and motor are able to produce torque and that the
mechanical brake does not slip before the drive releases
the brake and starts operating the crane.
Built-in Anti-sway Control
Load sway can occur in trolley and bridge travel motions.
The Hubbell Protorq
™
4960 drive’s anti-sway control
program automatically compensates for it when it happens.
The control program creates a mathematical model of
the crane’s pendulum. It estimates the pendulum’s time
constant by continually measuring the hoist position
and load properties, and factors in the swing velocity
and angle. When the operator changes the speed of the
crane’s travel, the drive quickly recalculates the required
speed reference to compensate for the crane’s speed
change, preventing the load from swaying.
There is no additional hardware required for this option.
Just a simple data communication cable is required
between the drives or eldbus communication modules.
Hubbell Industrial Controls, Inc.