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Power Assemblies and Controllers

Circuit Protection

Current Transformers

Sirio is a leading manufacturer of electromagnetic components for applications in industrial electronics. Their range of power transformers has been used in high frequency insulated power converters over the last ten years. Manufactured by a special dedicated automatic machine, Sirio's power transformers are widely used in demanding, high power applications with very high reliability expectations. 

Today, Sirio is one of the world's leading manufacturers of power transformers, specilaising in the development and production of current transformers, with more than a quarter of a million power transformers in the field.

Download Sirio's High Frequency Power Transformers and Inductors Brochure

 

Main Frequency Current Transformers

Main frequency current transformers are used to measure alternate currents at 50-60 Hz, up to 600 Arms.

Examples:

Sirio Mains Frequency Current Transformer

 

Main Frequency Current Transformers by GD Rectifiers

They are based on toroidal Silicon Iron core; they typically have a high number of secondary turns, so that the secondary current is relatively low. By connecting a burden resistance to the secondary side, you can read a proportional voltage signal, isolated from the mains. As the secondary current is low, the low power burden resistance can be connected to the PCB.

Current transformers are used to measure and detect alternate currents by keeping the galvanic isolation between the primary cable (the network) and the control stage. They typically have a high number of secondary turns, so that the secondary current is relatively low. By connecting a burden resistance to the secondary side, a proportional voltage signal, isolated from the mains can be read. As the secondary current is low, the low power burden resistance can be connected to the PCB.

 

Part Number          Ip (Arms)   Is (Arms)    n            Rc (Ω)     Uout (Vrms)      Outputs   D (mm)    Drawing  
TA 150120 400 0.400 n1-4=1000 20 8.0 Faston 1-4 26 150A
TA 150130

200

0.400 n1-2=500 20 8.0 Faston 1-2 26 150C
400 0.400 n1-3=1000 20 8.0 Faston 1-3 26 150C
600 0.400 n1-4=1500 20 8.0 Faston 1-4 26 150C
TA 150140 400 0.200 n1-4=2000 20 4.0 Faston 1-4 26 150A
TA 150150

200

0.200 n1-2=1000 20 4.0 Faston 1-2 26 150C
300 0.200 n1-3=1500 20 4.0 Faston 1-3 26 150C
400 0.200 n1-4=2000 20 4.0 Faston 1-4 26 150C
TA 150160 600 0.600 n1-4=1000 10 6.0 Faston 1-4 26 150A
TA 150170 600 0.200 n1-4=3000 20 4.0 Faston 1-4 26 150A
TA 151008 200 0.300 n1-4=1000 10 2.0 Faston 1-4 18 151A
TA 151100 100 0.200

n1-4=500

20 4.0 Faston 1-4 18 151A
TA 151110

25

0.200 n1-2=125 20 4.0 Faston 1-2 18 151C
50 0.200 n1-3=250 20 4.0 Faston 1-3 18 151C
100 0.200 n1-4=500 20 4.0 Faston 1-4 18 151C
TA 151133 100 0.100 n1-4=1000  20 2.0 Faston 1-4 18 151A
TA 152023 25 0.050 500 40 2.0 Pins 1-2 13 152B
TA 152025 25 0.050 500 40 2.0 Faston 1-2    13 152A
TA 152027 50 0.050 1000 80 4.0 Pins 1-2 13 152B
TA 152050 50 0.050 1000 80 4.0 Fastron 1-2 13 152A
TA 153001 70 0.140 500 25 3.5 Fastron 1-2 9 153A
TA 153002 70 0.070 1000 50 3.5 Fastron 1-2 9 153A
TA 153003 70 0.035 2000 100 3.5 Fastron 1-2 9 153A
TA 153004 100 0.040 2500 100 4.0 Fastron 1-2 9 153A
TA 153006 70 0.140 500 25 3.5 Pins 1-2 9 153B
TA 153007 70 0.070 1000 50 3.5 Pins 1-2 9 153B
TA 153008 70 0.035 2000 100 3.5 Pins 1-2 9 153B
TA 153009 100 0.040 2500 100 4.0 Pins 1-2 9 153B

 


Current Transformers for Measurement Applications

Current transformers for measurement purposes are used to measure alternate currents at 50-60 Hz, up to 50 Arms. They are typically used in energy metering applications, where high accuracy and small dimensions are required at the same time.

Sirio Current Transformers for Measurement Applications

Current transformers for measurement applications are available in two different versions; with passing-through hole and with the primary turn inside, this was developed to get an easier assembly process on the PCB.

Part Number          Ip (Arms)   n    Rc (Ω)         Rs (Ω)     E%             D (mm)    Up (kVrms)      Drawing  
TA 150800 15 max (1):1000  7 21 0.2 1 5 4200 1508FA
TA 150815 50 (1):1000 4 14 0.1 1 6 4200 1508FC
TA 150810 50 (1):1000 50 36 1.0 2 6 4200 1508FB
TA 150830 15 max 1:1000 7 21 0.2 1 0.8 4200 1508SA
TA 150811 50 1:1000 50 36 1.0 2 2.0 5000 1508SB

 

Current Transformers for High Frequency Applications

Current transformers for high frequency applications are used to detect high frequency currents, in order to protect an electronic switch against overcurrents in switching converters. They are typically connected at the primary side of medium-high power high frequency transformers, but they are also suitable for currents measurement, in applications which do not require high accuracy, but prompt response of the measurement equipment instead. 

Sirio High Frequency Applications

They are developed to detect alternate currents in the frequency range of some kHz. By connecting a burden resistance to the secondary side, you can read a proportional voltage signal, isolated from the mains. Depending on the application, other types of signal processing are available to use either by using digital or analogue techniques.

Part Number        Ip (Arms)     n           Ls (mH)     fmax (kHz)   Vt (μVs)    Drawing    D (mm)   Uis (Vrms)    Up (Vrms) 
TA 150511 20 (1):50 1.9 1000 180 1508FA 5 1000 4500
TA 150512 20 (1):100 7.5 400 400 1508FA 5 1000 4500
TA 150513 20 (1):200 30 100 850 1508FA 5 1000 4500
TA 150521 20 (1):50 4.5 500 160 1508FA 5 1000 4500
TA 150522 20 (1):100 19 200 360 1508FA 5 1000 4500
TA 150523 20 (1):200 76 50 750 1508FA 5 1000 4500
TA 150524 20 (1):500 475 10 1800 1508FA 5 1000 4500
TA 150320 25 (1):200 100 80 500 150320 6 750 3500
TA 150563 25 (1):1000   5000 10 2500 1508FB 6 750 4000
TA 150621 20 1:100 10 100 550 15062X 1.2 440 4000
TA 150622 20 1:200 40 50 1100 15062X 1.2 440 4000
TA 150625 20 1:1000 1000 10 6000 15062X 1.2 440 4000
TA 150641 50 1:100 10 100 850 15064X 2.3 480 4680
TA 150642 50 1:200 40 50 1900 15064X 2.3 480 4680
TA 150645 50 1:1000 1000 10 9000 1506X 2.3 480 4680
TA 152009 100 (1):100 31 60 2250 152A 13 1000 4000
TA 152059 100 (1):200 124 25 4500 152B 13 1000 4000
TA 153201 70 (1):50 11.5 500 650 153A 9 1000 4500
TA 153202 70 (1):100 45 200 1300 153A 9 1000 4500
TA 153203 70 (1):200 180 50 2700 153A 9 1000 4500
TA 153206 70 (1):50 11.5 500 650 153B 9 1000 4500
TA 153207 70 (1):100 45 200 1300 153B 9 1000 4500
TA 153208 70 (1):200 180 50 2700 153B 9 1000 4500
TA 150671 70 1:100 31 100 1400 15067X 3.5 600 5000
TA 150672 70 1:200 124 50 2800 15067X 3.5 600 5000

 

EE Core Based Drive Transformers

Pulse transformers are used in high frequency power converters, when an electrical pulse has to be transferred from the control stage to the power stage, by keeping the galvanic isolation between the circuits, according to the required safety standards. The electrical signal is applied to the primary winding and transferred to the secondary side, to fire electronic switches. The 109, 117 and 118 families are based on different sizes of EE cores.

Sirio EE Core Based Drive Transformer

The part numbers listed below are some examples, Sirio can also develop special drive transformers with any turns ratio, dedicated and bespoke to your application.

 

Part Number        n               Vt (μVs)       Ip (mArms)    Lp (mH)    Ls (μH)       Ck (pF)      Uis   (Vrms)     Up (Vrms)    Drawing     
TI 109204 1:1:1 120 300 0.85 2.0 14 700 4200 109B
TI 109210 1:1:1 250 300 2.50 5.0 25 330 3100 109A
TI 109215 1:1.2:1.2 150 250 1.30 3.0 20 500 4000 109B
TI 109217 1:1 200 350 1.75 5.0 25 440 3750 109C
TI 117110 1:1 300 200 3.50 5.0 35 500 4000 117C
TI 117120 1:1:1 300 200 3.50 2.2 35 500 4000 117D
TI 117147 2:1 250 400 5.80 10.0 25 500 4000 117C
TI 117160 3:1 150 500 5.80 13.0 30 500 4000 117C
TI 117610 1:1 150 600 0.35 0.9 25 700 4000 117C
TI 117615 1:1:1 150 600 0.35 0.6 40 700 4000 117D
TI 118310 1:1 500 400 2.3 4.0 50 500 4000 118E
TI 118320 1:1:1 500 400 2.3 2.5 50 500 4000 118F
TI 118330 2:1:1 500 300 9.0 6.0 50 500 4000 118F
TI 118340 1:1 1000 300 9.0 14.0 50 500 4000 118E

 

Low Coupling Capacity Gate Drive Transformers   

Sirio's low coupling capacity gate drive transformers is a crucial component in today's industry, the low coupling capacity between the windings is particularly important to avoid any unwnated firings of electronic switches. 

Sirio Low Coupling Capacity Gate Drive Transformer

They are predominantly used in the multiple shot firing technique. Standard versions are designed with one or two secondary windings and the automatic winding process enhances their quality and price ratio.

 

Part Number        n             Vt (μVs)      Imax (mA)       tr(μs)      Rc (Ω)      Ck (pF)     Uis (Vrms)     Up (Vrms)  Drawing     
TI 108010 1:1 250 250 1.5 40 7 500 3100 108A
TI 108020 1:1:1 250 250 1.5 40 7 500 3100 108C
TI 108030 2:1 350 250 3.5 40 8 500 3100 108A
TI 108040 2:1:1 350 250 3.5 40 8 500 3100 108B
TI 108050 3:1 300 250 2.5 40 8 500 3100 108A
TI 108060 3:1:1 300 250 2.5 40 8 500 3100 108C
TI 110153 1:1:1 600 100 1.2 100 8 500 4000 110D
TI 110154 3:1:1 600 100 1.2 100 7 500 4000 110D
TI 110155 1:1 500 100 1.0 100 7 500 4000 110E
TI 110233 1:1:1 300 250 1.2 40 7 500 4000 110D
TI 110234 3:1:1 300 250 1.0 40 7 500 4000 110D
TI 110239 1:1 350 250 2.0 40 5 500 10000 110F

 

Ring Core Based Gate Drive Transformers  

The electrical signal is applied to the primary winding and transferred to the secondary side, to fire electronic switches. The 111, 112, 113 and 114 families are based on different sizes of ring cores. The characteristics of these components are very different because several magnetic core materials and sizes can be used and different winding distributions can be chosen. 

Sirio Ring Core Based Gate Drive Transformers 

Laminated materials are a preferred option for most engineers because they have much higher values of saturation flux density compared to ferrites which allows reduced dimensions, especially for medium-low switchingfrequency values (some tens kHz), and a much stable behavious with temperature, making them the ideal solution for critical environment conditions. Ferrites are the most cost effective option for engineers and toroidal components, similarly to the laminated materials, offer impressive technical features.

Part Number      n                            Vt (μVs)       Imax (mA)    tr (μs)     Rc (Ω)      Ck (pF)       Uis  (Vrms)    Up (Vrms)   Drawing    
TI 111010 1:1 200 400 1 27 160 380 2000 111A
TI 111020 1:1:1 200 400 1 27 160 380 2000 111B
TI 112130 1:1 500 2000 1 15 70 500 4000 112A
TI 112140 1:1:1 500 2000 1 15 70 500 4000 112B
TI 113150 1:1 1000 2000 1 10 100 500 5000 113A
TI 113160 1:1:1 1000 2000 1 10 100 500 5000 113B
TI 114070 1:1 2000 2000 1 8 230 380 3100 114A
TI 114080 1:1:1 2000 2000 1 8 230 380 3100 114B

For further information or to discuss your enquiry, please email: .(JavaScript must be enabled to view this email address) or call: 01444 243 452.

Sirio

Sirio is a leading manufacturer of electromagnetic components for applications in industrial electronics. They manufacture a wide range of products including: Inductors and Chokes, PFC and Power Capacitors, Pulse Transformers, Current Transformers, HF & Pulse Transformers, Current Transducers and Voltage Transducers.

Further information:

You can find further information on Sirio using the following links:

Tel: 01444 243 452

Fax: 01444 870 722

Email: enquiries@gdrectifiers.co.uk