The Kinetics model type ESR is a
product designation for a excitation
system that contains, as a minimum,
an exciter and a solid state field
application circuitry. A typical ESR
system would include a Kinetics’
SVR rectifier, SynchApp-SS application
circuit and KinetSync-SR digital logic
and annunciation module.
Kinetics Industries is the only manufacturer
in the United States to design and
manufacture the critical segments
required for a brush type motor excitation
system as a single source manufacturer.
Kinetics has the in-house design and
manufacturing capacity to:
- Fabricate enclosures and/or panels.
- Transformers manufactured up
to 2500 KVA and 15 KV class.
- Electronic circuitry.
- Power semi-conductor assemblies
and associated firing circuits.
- Software logic, control and annunciation.
- Unit testing using a synchronous
One source responsibility for an
excitation system is our goal. Kinetics
products are designed specifically
for synchronous motors. Our units
are not an adaptation or function
compromise using components designed
for another type of machine, such
a generator or motor drive. Synchronous
motors and the processes they drive,
have specific needs that Kinetics
has incorporated into the product
We are flexible! Kinetics can manufacture
a complete system but we are willing
to work with a customer to use existing
component sections, components provided
by "other" or components
sections manufactured by a competing
The primary segments of a Kinetics
designed & manufactured excitation
- Primary disconnect – fusing
panels or circuit breaker.
- EPT – exciter power transformer.
- DC field exciter – regulated
or non-regulated output.
- Field application panel –
solid state switching or DC contactors.
digital annunciation and logic controller
- Discharge resistor grid.
- Stand alone enclosure or open
panels for mounting by other.
The ESR, synchronous motor field
application system is a state-of-the-art
system that provides continuous, confirmed
motor and excitation system operational
status, protection and control. The
ESR consists of an integrated regulated
exciter rectifier and a 100% solid
state synchronous motor field application
panel. The ESR system incorporates
solid state sensing of the motor field
characteristics, digital logic sequencing
control and protection, regulated
solid state rectification with a motor
field and discharge resistor engaging
and disengaging by means of Kinetics’
high peak reverse voltage blocking
capacity semi-conductor switching
package that includes crowbar protection
sequencing protection to assure application
of the field discharge resistors.
Kinetics’ philosophies of design
and manufacturing are applied in every
Kinetics ERS excitation system. We
strive to design and manufacture a
product that is low in maintenance,
conservatively rated, interactive
with the production system and provides
annunciation and diagnostic feedback
that helps to minimize troubleshooting
Maximum motor protection is a critical
product goal. The Kinetics ESR system
is a "confirmed motor status"
operating system. The motor line voltage,
stator current, motor power factor,
exciter field voltage & current
and field discharge resistors are
continuously monitored for confirmed
proof of the motor and excitation
system is in a "correct"
operational status. Inter-locking
and overlapping protection features
provide for maximum motor and power
system protection. At no time does
the system have "blind"
spots of operation or is the field
applied with the assumption that the
motor has reached synchronous pull-up
The motor field current is monitored
throughout the starting, running and
shutdown sequences to provide continuous
sequence and operational protection
and motor operating status annunciation.
The Kinetics KinetSync-SR includes
a history / date stamp registry that
records events, dates and times that
caused a "trip" taking the
A focus point feature of the Kinetics
field application system is the "impending
pullout of synchronization protection".
By using signals from the AC motor
starter CT’s and PT’s,
Kinetics’ field application
logic circuitry senses that the motor
is pulling out of synchronization
and shuts the motor down, by tripping
the motor starter off line, before
the motor is pulled out of synchronization.
Pulling out of synchronization, while
the motor is under load, can cause
damage to the motor and produces significant
power system disruption.
The ESR excitation package is designed
to operate in conjunction with the
AC motor starter using control signals
from the starter CT’s &
PT’s. The rider signal burden
required by the Kinetics system to
the CT’s & PT’s is
negligible. Kinetics can provide a
motor starter with the excitation
system as an available option.
An integral part of the ESR system
is the highly reliable, field proven,
Kinetics SVR regulated excitation
rectifier that is designed and rated
for the highly inductive load operating
parameters of the synchronous motor
field excitation. The output of the
SVR exciter can have the regulation
feedback loop closed on either field
current, field voltage, motor power
factor, VAR’s or a remotely
supplied signal by "other".
The mode of output regulation must
be selected at time of order. For
a detailed specification on the rectifier
section of the ESR see the description
for the SVR model types.
The Kinetics SynchApp-SS is the section
of a field application system that
assures that the excitation power
is applied to the motor field at the
correct time and the field discharge
path is applied or removed when required.
The Kinetics system incorporates a
redundant configuration of both a
solid state SCR switching package
and a semi-conductor crowbar circuit.
An avalanche diode circuit, often
referred to as a "crowbar circuit"
is provided on the field discharge
circuit SCRs as a backup to the controlled
electronic discharge SCR triggers.
This circuit, figuratively, converts
the discharge SCRs into diodes when
operative. The crowbar functions if
the voltage across the field discharge
path exceeds the avalanche point of
the avalanche diode (Zener diodes)
without an electronic trigger circuitry
power. The avalanche or "crowbar"
level is selected to be above the
maximum peak voltage from the rectifier
and below the peak inverse rating,
PRV, of the power semi-conductors
and well below the safe dielectric
level of the motor field insulation.
The Kinetics SynchApp-SS system assures
that the discharge path is effectively
closed even in a powered down condition.
The operating center of the Kinetics
ESR system is Kinetics’ KinetSync-SR
digital annunciation and logic controller
module. The robustly designed and
manufactured KinetSync-SR module is
a digital logic, micro-processor based,
state-of-the-art industrial control
module that continuously monitors
the systems operational functions.
The unit provides continuous readout
of the systems operational status
during the start-up sequence, run
and the shutdown sequence. The unit
includes a detailed "trip"
history registry and date stamp function
for assistance in servicing and maintenance
to the motor, motor starter and /
or excitation system.
Amortisseur or squirrel cage winding
service factor protection is provided
by a "dwell time lockout"
the prevents damage to the motor from
immediate attempted motor re-start
as a standard feature. The dwell time
interval is adjustable through the
operator keypad of the KinetSync-SR
The KinetSync-SR provides the following
protection and features:
- Continuous monitoring of motor
and field excitation system.
- Assurance of field discharge
- Motor start incomplete sequence
- Field loss protection.
- Motor pull-out-of-synchronization
- Locked rotor protection.
- Control voltage signal for field
application at the proper speed
and phase angle.
- Unit includes a ready to use
RS232 communications port.
- Touch pad parameter of operation
- Security code protection by touch
- Power factor monitoring and vernier
signal for interfacing with a regulated
- Motor dwell time lockout function.
- Back lit LCD annunciation screen
for continuous display of motor
field amps, field volts, power factor
and motor operational status.
- System "problem" flashing
- LCD screen displays cause of
"fault" or system "problems"
- Trip history registry and date
- Laptop computer accessible through
the RS232 interface port.
- UL and ULC listed product
From our years of working with industrial,
utility and OEM customers, a common
concern of installers and maintenance
people alike, is to install component
sections as quickly as possible and
minimize the possibility for interconnection
wiring errors. Kinetics is the only
manufacturer to offer factory manufactured,
electro-statically shielded, interconnection
cables with heavy industrial Molex
plugs for use with our KinetSync-SR
unit to the SynchApp-SS exciter /
field application panel.
Kinetics’ factory test stand
includes a synchronous motor. All
Kinetics manufactured excitation systems
are tested via the brush type synchronous
motor within our testing facility.
Kinetics excitation system optional
features: (Partial list)
- Field forcing – common
to rolling mills
- Motor inching control –
common to ball & bar grinding
- Redundant / parallel system or
- Remote operation and annunciation
for un-manned motor rooms or facilities.
- Synchronous condenser operation.
- Non-standard voltages.
- "Low" RPM machines with
"large" field current
- Application environmental demands
such as "high" elevations
or elevated operating environments.
- AC motor starter.
- Kinetics factory start-up engineer
for unit commission and training.
- Units manufactured and tested
to CSA or UE standards.
Information needed for a
- Is a system section or an entire
- Industry / application of the
motor / type of load.
- Motor horsepower, line voltage,
field volts, field current.
- AC input voltage available for
- Discharge resistance value specified
by the motor manufacturer.
- Starting acceleration time to
- Motor starter relay coil type,
AC or DC.
- Enclosure, cell-in-cell or open
- Is it desirable to place operational
information / data onto a communication
network such as SCADA or MOD BUS?
- Application specific requests.