Category: Industry Trends

Digital Tapchanger Control for transformers and regulators

The TCC300 is a dedicated controller for metering,

monitoring, and operational control of step-voltage load tap

changers. The TCC300 is a microprocessor-based package

suitable for substation transformers with on-load tap

changers. The TCC300 can be easily integrated to replace

electromechanical on-load tap changer controllers or for

new installations requiring state-of-the-art controllers.

The TCC300 provides reliable operation with expanding

capabilities such as means to address distributed

generation and cyber security requirements.

− LCD display (rated –20 to +70 degrees Celsius) or Vacuum

Fluorescent display optionally available (rated ‑40 to +80

degrees Celsius)

− Optional Control Power Backup Input for Fiber Optic commu

nication loop‑through

− DNP3.0. MODBUS® and IEC 61850 Communications Protocols available

− Optional Ethernet RJ45 or Fiber Optic Ethernet

Application

REG630 has been designed to be the main

protection for synchronous generators, offering

full protection during start-up and normal run

for both the generator and the prime mover.

The comprehensive generator management relay

is typically used in small and medium-sized diesel,

hydroelectric, combined heat and power (CHP),

and steam power plants. REG630 offers one

predefined configuration, intended for directly

connected generator sets. REG630 has been extended with low-voltage

ride-through, reactive power undervoltage and

voltage vector shift protection to further ensure

grid stability and reliability, and thus avoid grid

collapse. The low-voltage ride-through protection

allows monitoring of distributed generation

during low-voltage fault ride-through, in order

to determine whether and when to disconnect,

for instance, a solar or wind farm from the grid.

Also the reactive power undervoltage protection

does the same but specifically at the grid

connection point, whereas the voltage vector

shift protection detects islanding from the grid.

An optional RTD/mA module offers eight

analog RTD or mA measuring inputs and four

mA outputs. The RTD and mA inputs can be

used for temperature measurement of generator

bearings and stator windings, thus extending the

functionality of the thermal overload protection

and preventing premature aging of the generator

windings. They can also be used for measuring

the ambient air or coolant temperature. The four

mA outputs can be used for transferring freely

selectable measured or calculated analog values

to devices provided with mA inputs.

Generator protection and control REG630

REG630 has been designed to protect small and medium-sized power generators

and power generator-transformer blocks in utility and power distribution systems.

The RTD and mA inputs can be

used for temperature measurement of generator

bearings and stator windings, thus extending the

functionality of the thermal overload protection

and preventing premature aging of the generator

windings. They can also be used for measuring

the ambient air or coolant temperature. The four

mA outputs can be used for transferring freely

selectable measured or calculated analog values

to devices provided with mA inputs.

Product highlights

• Extensive range of protection functionality

for both synchronous generators and

interconnection points of distributed

generation units

• Extensive generator protection with 100%

stator earth-fault, generator differential

and underexcitation protection

• Advanced interconnection protection fulfilling

the latest grid codes for higher grid stability and reliability

Application

REM630 has been designed to be the main

protection for both asynchronous and

synchronous motors and their drives, offering

full protection during motor start-up and normal

drive operation. The comprehensive motor

management relay is typically used with circuit

breaker and contactor-controlled, medium-sized

and large motors with varying load in drives such

as pumps, fans, compressors, mills and crushers.

REM630 offers two predefined configurations,

of which one is intended for medium-voltage

asynchronous motor applications and the other

for asynchronous and synchronous motor

applications requiring differential protection.

An optional RTD/mA module offers eight

analog RTD or mA measuring inputs and four

mA outputs. The RTD and mA inputs can be

used for temperature measurement of motor

bearings and stator windings, thus extending

the functionality of the thermal overload

protection and preventing premature aging

of the motor windings. They can also be used

for measuring the ambient air or coolant

temperature. The four mA outputs can be used

for transferring freely selectable measured

or calculated analog values to devices provided

with mA inputs.

Motor protection and control REM630

REM630 has been designed to protect medium-sized and large asynchronous

and synchronous motors in the manufacturing and process industry.

Product highlights

• Motor protection both during motor start-up

and normal run, with protection and fault

clearance also in abnormal situations

• Extensive motor protection for medium-sized

and large asynchronous and synchronous

motors requiring differential protection

• Extensive motor supervision capabilities via

RTD and mA measurements

 The RTD and mA inputs can be

used for temperature measurement of motor

bearings and stator windings, thus extending

the functionality of the thermal overload

protection and preventing premature aging

of the motor windings. They can also be used

for measuring the ambient air or coolant

temperature. The four mA outputs can be used

for transferring freely selectable measured

or calculated analog values to devices provided

with mA inputs.

The RTD and mA inputs can also be used for

tracking the position of the on-load tap changer.

The four mA outputs can be used for transferring

freely selectable measured or calculated analog

values to devices provided with mA inputs.

Product highlights

• Extensive range of protection and control

functionality for two-winding HV/MV power

transformers, including advanced and fast

differential protection with high inrush stability

• Support for various neutral earthing options,

matching either high-impedance or numerical

low-impedance restricted earth-fault principles

• Automatic voltage regulation of power

transformers with a motor-driven on-load tap-changer

Application

RET630 has been designed to be the main

protection and offer full protection for

two-winding power transformers. The

comprehensive transformer management

relay offers two predefined configurations,

of which one is intended for two-winding, high

and medium-voltage (HV/MV) transformer

applications not requiring restricted earth-fault

protection, and the other for such applications

requiring it.

Hot spot and aging rate monitoring is

introduced, which allows calculating the hot

spot temperature of the transformer winding

and the momentary aging rate. As a result,

the impact of thermal stress on the lifetime

of the transformer can be determined.

RET630 also features an integrated voltage

regulator. The voltage regulator allows automatic

and manual voltage regulation of power

transformers with a motor-driven on-load

tap changer.

An optional RTD/mA module offers eight analog

RTD or mA measuring inputs and four mA

outputs. The RTD and mA inputs can be used for

measuring the oil temperature at the bottom and

top of the transformer tank and the ambient

temperature, thus extending the functionality of

the thermal overload protection and preventing

premature aging of the transformer windings.

Transformer protection and control RET630

RET630 has been designed to protect power and step-up transformers

in utility and industrial power distribution systems. RET630 is also ideal for

transformer bay control.

An optional RTD/mA module offers eight analog

RTD or mA measuring inputs and four mA

outputs. The RTD and mA inputs can be used for

measuring the oil temperature at the bottom and

top of the transformer tank and the ambient

temperature, thus extending the functionality of

the thermal overload protection and preventing

premature aging of the transformer windings.

The RTD and mA inputs can also be used for

tracking the position of the on-load tap changer.

The four mA outputs can be used for transferring

freely selectable measured or calculated analog

values to devices provided with mA inputs.

Application

REF630 has been designed to be the main

protection for overhead lines and cable feeders,

in either isolated neutral, resistance-earthed,

compensated or effectively earthed distribution

networks. The comprehensive feeder

management relay offers four predefined

configurations, intended for open/closed ring

feeder applications, radial overhead/mixed line

feeder applications, ring/meshed feeder

applications and bus sectionalizers.

The earth-fault protection has been significantly

extended, now including not only directional

and non-directional, transient/intermittent,

wattmetric and admittance-based, but also both

harmonics and multifrequency admittance-based

earth-fault protection. The new additions take

the earth-fault protection to new heights,

creating an extensive earth-fault protection

portfolio. In addition, the sensitivity of the

intermittent earth-fault protection has been

significantly improved and reactive power

undervoltage protection added.

Product highlights

• Extensive earth-fault protection portfolio with

unique multifrequency admittance-based

protection for higher sensitivity and selectivity

• Advanced and fast fault location of short

circuits and earth faults

REF630 also includes a fault locator that locates

short circuits in radial distribution networks and

earth faults in effectively and low-resistance

earthed ones. If the fault current is as high as or

higher than the load current, earth faults in

isolated neutral distribution networks will also

be located.