Single Phase Step Voltage Regulator

Farady Electric Co.,Ltd VR-8 single phase step voltage regulators are tap-changing autotransformers. They regulate distribution line voltages from 10% raise (boost) to 10% lower (buck) in thirty-two steps of approximately 5/8% each. Voltage ratings are available from 2400 volts (60 kV BIL) to 34,500 volts (200 kV BIL) for 60 Hz and 50 Hz systems. Internal potential winding taps and an external ratio correction transformer are provided on all ratings so that each regulator may be applied to more than one system voltage. Smaller kVA sizes are supplied with support lugs for pole mounting and with substation or platform tie down provisions. Larger sizes are provided with substation bases with pad-mounting provisions

VR-8 voltage regulators are designed for reliable operation and ease of mainte-nance and are supplied with a full array of standard features for routine applications. Optional accessories are available to ac-commodate special applicate it is also suitable for the energy saving projects for railway and urban grid. Farady Electric series voltage regulators are available with a full complement of standard

features for routine applications, as well as a full line of optional accessories for unique applications. In addition, the regulator offers desirable features that enhance operation and service.
Standard Features

• SEL control box
• Tap changer with motor and power supply
• Position indicator with ADD-AMP adjustment
• Two laser-etched nameplates
• Lifting lugs
• Oil drain valve and sampling device
• Upper filter press connection
• Oil sight gauge
• Mounting provisions for shunt arresters
• High-creep bushings with clamp-type connectors
• Bolt-down provisions (overhead units)
• Pole-type mounting brackets (overhead units)
• Substation base (substation units)
• External series arrester
• Automatic pressure relief device
• Control cabinet with removable front panel
• Ratio correction transformer
• Conformally coated circuit boards
• Shunt arresters

• Extra-length control cables
• Elevating structure
• 4-hole NEMA® H-spades
• Cooling fans
• Nameplates in alternate languages or metric units
• Internal differential potential transformer for complete reverse power flow w/metering
• SEL control accessories
• Multi-phase functionality
• Front panel overlays in alternate languages
• Serial communications interfaces:
– RS232
– Fiber Optic – ST
– RS485
• Ethernet communications interfaces:
– Fiber Optic – LC, MTRJ, ST, and SC
– Copper – RJ45
• Communications protocols:

Technical Specification

VR-8 single-phase step voltage regulators are tap-changing autotransformers designed to automati- cally regulate distribution line voltages in a range of plus or minus 10% in 32 stepsof approximately 5/8% each. The following ratings are available:

• Voltage: 2500 Volts (60 kV BIL) through 33000 Volts (200 kV BIL)
• Current: 50 through 1665 Amps
• KVA: 33 through 1000
• Frequency: 50 or 60 Hertz

Internal potential winding taps and/or an external ratio correction transformer are provided on all ratings so that each regulator may be applied within a range of system voltages.

A digital control system automatically operates the tap changer mechanism to maintain system voltage within desired limits. The control system is externally programmable to allow precise setting of control limits and provides sophisticated capabilities for special control require- ments, communication, and data logging.

Overhead type voltage regulators are supplied with support brackets for pole mounting and have bolt-down provisions for pad-mounted applications. Substation type voltage regulators are provided with rectangular substation bases. Elevating platforms are available as an option.

General Specification

Operating temperture -40-+85
power supply 120VAC,
range 88-132VAC,
Burden less than 35VA,
Interruption less than 50ms at 120VAC per IEC60255-11
120VAC whetting source
Range 88-132 VAC,
Rated Current 6A(motor fuse) 120VAC
auxiliary output source Range 11-14vdc,
output power 6w at 12vdc
Metering Accuracy:load current+_ 0.3%+-500uA(0.001-2.000A)and 0.5°（0.020-2.000A）harmonics(2nd-15th) current:+-5% of fundamental(0.02-0.64A) voltage +10.3% and +-0.5°（80-145vac) Synchrophasor Accurancy
Maximun data rate in messages per second
IEEE C37.118 protocel 60(nominal 60hz system) or 50(nominal 50hz system)
IEEE C37.118 accuracy Level 1 at maximum message rate when frequency-based phasor compensation is enabled
Nominal current 450mA,
Current range 45 to 540mA

Frequency range+_ 5hz of nominal(50-60Hz)

voltage range 80-145V(voltage range is limited by power supply ratings)

phase angle range-180 to 180°

VR-8 series step voltage regulator use Schweitzer Engineering Laboratories ,Inc(SEL) universal controller box model number  SEL-2431
Flexible Communications Options

Creating the perfect voltage profile

  Apply the SEL-2431 to your single-phase voltage regulators to optimize your voltage profile—now and in the future. After initial construction, feeder load growth causes drastic, unplanned voltage deviations. Single-phase voltage regulators installed at the midpoint or cascaded throughout the feeder can dynamically flatten the voltage profile.

Stay Connected to Your System, Even Without a Network

Use the SEL-2431 to capture event reports, load profile, tap history, and other system parameters; then use a USB flash drive to retrieve the data. Event reports and load profile capture valuable data about the events on your system, while tap history,

motor current oscillography , and SER contain valuable data about the state of

your voltage regulator. Together, these data enable you to stay connected for troubleshooting, analysis, and planning
 

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