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.
Interview with Tilo Else, Siemens Energy's Vice President for Distribution Transformers
The energy market is rapidly evolving with the energy transition as one of the most fundamental changes: What challenges does this rapidly changing energy landscape pose for customers?
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.
Voltage regulators for all needs
Siemens invented the voltage regulator in 1932. Voltage Regulators are highly reliable soutions for stabilizing voltage fluctions in the customer's grid 24/7. They are notably more cost-effective for customers compared to other oprions. Voltage regulators come in 1-phase or 3-phase models. Different cooling systems are available. They can be applied to any electrical system to improve voltage quality. 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 31.8kVA and 889kVA. 3-phase units are available at 13.2kV, 34.5kV, or from 500kVA up to 4,000kVA.
JFR and SFR medium-voltage voltage regulators
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.
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.
Withstand voltage levels lightning impulse (BIL) kV
kVA
Catalog number
1,000
250
10-02.5-250.0
10-02.5-333.0
416.3
11-02.5-416.3
95
100
76.2
10-07.6-076.2
95
167
10-07.6-167.0
10-07.6-333.0
548
416.3
10-07.6-416.3
656
10-07.6-500.0
509
667
1,093
10-07.6-833.0
10-07.6-889.0
95
1,456
1,110
11-07.6-1110.0
150
100
144
10-14.4-144.0
150
200
288
10-14.4-288.0
150
300
432
10-14.4-432.0
150
400
576
150
578
833
10-14.4-833.0
150
50
100
100
200
10-19.9-200.0
400
335
667
150
418
833
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).
Withstand voltage levels lightning impulse (BIL) kV
kVA
Catalog number
ONAN/ONAF
ONAN
ONAN
219
500
ONAN
ONAN
ONAN
40-13.2-1500
ONAN
ONAN
2,500
40-13.2-2500
ONAN
ONAN
41-13.2-0625
ONAF
410
937
41-13.2-0937
ONAF
ONAF
2,000
ONAF
2,667
ONAF
41-13.2-3333
ONAF
ONAF
200
84
500
40-34.5-0500
ONAN
200
167
1,000
40-34.5-1000
ONAN
200
251
1,500
40-34.5-1500
ONAN
200
335
2,000
40-34.5-2000
ONAN
200
105
625
ONAF
200
209
1,250
41-34.5-1250
ONAF
200
335
2,000
41-34.5-2000
ONAF
200
446
2,667
ONAF
Ratings for 60 Hz applications
