Voltage Regulators

The alternative to grid-expansion

Step voltage regulators can improve the utility's return on investment by increasing demand at off-peak periods and, with certain accessories, even reduce the peak demand load. This translates into improved revenue for the utility company while also improving the quality of service to the customer.

Voltage regulator: the alternative to grid-expansion

Our voltage regulators are a cost-saving alternative to grid-expansion, as they can be easily installed and integrated into existing grid structures. We offer flexible regulation models for optimum operation.

The standard voltage regulator provides approximately 10% adjustment. However, in some designs, regulations of 15% and 20% are also available. Available at 50 or 60 Hz, their ratings are calculated according to the voltage level of the transformer they are connected to (i.e., 10%). Voltage level ratings for 1-phase voltage regulators vary between 2.5kV and 19.9 kV and between  76.2kVA and 1110kVA. 3-phase units are available at 13.2kV, 34.5kV, or from 500kVA up to 4,000kVA.

  • Cost-saving alternative to grid expansion
  • Easily integrated into existing grid structure
  • Easy installation
  • Extensive regulating range
  • Flexible regulation models for optimum operation

When it comes to voltage regulation, Siemens Energy provides technology that serves the customer. Our manufacturing experience for voltage regulators and controls is unsurpassed in the industry. Today, Siemens Energy has the largest quantity of regulators installed worldwide. The type JFR has been an industry leader since 1936. It is a single-phase 5/8% step regulator utilizing the Siemens Energy type MJ4 or MJ6 control panel or adaptable to any control panel.

  • Electrostatically-applied polyester paint provides greater resistance to corrosion in harsh environments.
  • Type-316 stainless steel external hardware to eliminate rust and galling.
  • Sealed tank has pressure relief device to vent gases produced during tap changes. The Siemens 55°C rise regulators can be loaded to up to 12 percent above nameplate rating, with the 65°C insulation system.
  • External metal-oxide varistor (MOV) bypass arrester provides superior protection to the regulator series winding from surge and system transients.
  • Oil-sight gauge allows oil levels and oil conditions to be checked without de-energizing the regulator.
  • Motor capacitor installed in the control cabinet allows replacement without bypassing and transitioning the regulator out of service.
  • Polarized disconnect switch (PDS) facilitates easy control installation of change out without taking the regulator out of service.
  • Cover-mounted terminal block provides easier access to wiring by eliminating the need to go under the oil to change tap connections.
  • Monitor and automatically control output voltage through the use of state-of-the-art microprocessor control panels MJ-6.
  • High-creep bushings provide a minimum creep distance of 17" (432 mm).
  • Oil-drain valve includes an oil sampling valve for easy access.
  • Platform base is equipped with provisions to securely attach regulator to sub-base assembly.

  • Remote mounting cables 15' to 50' (4.5 m to 15.2 m)
  • Substation bases
  • Lightning arrester
  • Bird guards
  • Auxiliary potential transformer
  • Auxiliary current transformer
  • Bypass switches

Options include:

  • Stainless-steel tank
  • Esther fluid
  • Padmount design
  • +/- 20% regulation
  • Heated cabinet
  • Lightning arresters.

External modifications line terminals:

  • Special ground pads/connectors
  • Lowered control enclosure
  • Special ultra-creep bushings
  • Thermometers or fans (if possible)
  • Special drain valves
  • Nameplate changes/modifications.

Internal modifications:

  • Source-side potential transformer
  • Special current transformer.

Technical data (applicable for the US market)

Maximum design voltage kV Withstand voltage levels lightning impulse (BIL) kVLoad current AkVACatalog number
2.56040010010-02.5-100.0
2.56066816710-02.5-167.0
2.5601,00025010-02.5-250.0
2.5601,33233310-02.5-333.0
2.5601,665416.311-02.5-416.3
7.69510076.210-07.6-076.2
7.695150114.310-07.6-114.3
7.695 21916710-07.6-167.0
7.695 32825010-07.6-250.0
7.695 43833310-07.6-333.0
7.695 548416.310-07.6-416.3
7.695 65650010-07.6-500.0
7.695 66850910-07.6-509.0
7.695 87566710-07.6-667.0
7.695 1,09383310-07.6-833.0
7.695 1,16788910-07.6-889.0
7.6951,4561,11011-07.6-1110.0
14.415010014410-14.4-144.0
14.415020028810-14.4-288.0
14.415030043210-14.4-432.0
14.415040057610-14.4-576.0
14.415057883310-14.4-833.0
19.91505010010-19.9-100.0
19.915010020010-19.9-200.0
19.915020040010-19.9-400.0
19.915033566710-19.9-667.0
19.915041883311-19.9-833.0
Ratings for 60 Hz applications

The Siemens Energy padmount voltage regulator offers a new dimension to underground system planning and design that preserves an aesthetically pleasing environment. Maintaining all of the functionality of a traditional regulator, the padmount voltage regulator promotes safety because there are no exposed high-voltage lines. Additionally, the tamper-resistant, secured cabinet design protects the access to components including the drain valve, bushings and cover bolts. The layout and positioning of the controls is on the narrow end of the box, which allows for additional placement options and smaller operational space requirements. The controls are ergonomically positioned for easy access for operators. The bushing connections and sample valve reside in the lower enclosure. With the Siemens Energy padmount voltage regulator, safety and reliability are enhanced, construction costs are reduced, and land requirements are smaller for a more attractive physical profile for the public.

The type SFR is a vertically integrated, three-phase regulator, which also comes with the capability of separating the tap changer. This significantly increases the life of the regulator. Siemens Energy offers distinct advantages with all of our three-phase regulators engineered and manufactured in-house. Our expertise in both technology and service gives us additional advantages in the custom engineering necessary for most three-phase regulator applications. The SFR voltage regulator has proven its reliability and durability in the toughest environments. Unit construction, tough exterior coating and a side inspection door are just a few of the time-tested features of today’s SFR. Additionally, Siemens Energy offers the popular SFR-X which features a separate tap-changing mechanism compartment allowing for easy inspection and maintenance. Separating the regulator tap-changer significantly increases the life of the regulator by eliminating arcing in the main tank containing the coil and core.

Features include:

  • Magnetic-temperature indicator
  • Pressure-relief device
  • Lightning-arrester brackets
  • Magnetic-type, liquid-level indicator
  • Magnetic-type temperature indicator
  • Special bushings
  • MR tap-changer option (SFR-MR)
  • Customized controls
  • Special CT/PT
  • Station class arresters
  • Separate tap changer compartment (available with  SFR-X and SFR-MR).

  • Liquid-temperature indicator with or without alarm
  • Pressure-relief gauge with or without alarm.

Technical data (appliable for the U.S. market)

Maximum design voltage kV Withstand voltage levels lightning impulse (BIL) kVLoad current AkVACatalog numberONAN/ONAF 
5.07534630040-5.0-0300

ONAN

5.07586675040-5.0-0750

ONAN

13.295 or 110

219

500

40-13.2-0500

ONAN

13.295 or 11032875040-13.2-0750

ONAN

13.295 or 1104371,00040-13.2-1000

ONAN

13.295 or 1106561,500

40-13.2-1500

ONAN

13.295 or 1108742,00040-13.2-2000

ONAN

13.295 or 1101,093

2,500

40-13.2-2500

ONAN

13.295 or 1101,3002,97240-13.2-2972

ONAN

13.295 or 110274625

41-13.2-0625

ONAF

13.295 or 110

410

937

41-13.2-0937

ONAF

13.295 or 1105461,25041-13.2-1250

ONAF

13.295 or 110874

2,000

41-13.2-2000

ONAF

13.295 or 1101,166

2,667

41-13.2-2667

ONAF

13.295 or 1101,4583,333

41-13.2-3333

ONAF

13.295 or 1101,7504,00041-13.2-4000

ONAF

34.5

200 

84

500

40-34.5-0500

ONAN

34.5

200 

167

1,000

40-34.5-1000

ONAN

34.5

200 

251

1,500

40-34.5-1500

ONAN

34.5

200 

335

2,000

40-34.5-2000

ONAN

34.5

200 

105

625

41-34.5-0625

ONAF

34.5

200 

209

1,250

41-34.5-1250

ONAF

34.5

200 

335

2,000

41-34.5-2000

ONAF

34.5

200 

446

2,667

41-34.5-2667

ONAF

Ratings for 60 Hz applications

Make use of our services

For your convenience, we have gathered relevant downloads in one spot. If your question is still unanswered, please feel free to contact our Energy Support Team.

JFR single-phase voltage regulator
PDF (129 KB)
Padmount voltage regulator
PDF (93 KB)
SFR and SFR-X
PDF (132 KB)

Contact the Customer Support Center

Contact form

 

+49 911 6505 6505

support@siemens-energy.com

 

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