AE Dimmerstat Continuously Variable Voltage Auto-Transformer

Name: AE Dimmerstat Continuously Variable Voltage Auto-Transformer
Brand: Automatic Electric Ltd. (AE)

Price on enquiry

Continuously variable voltage auto-transformers for stepless control of AC voltage, single and three phase, manual or motorised.

Sankalp Electricals is an authorised dealer of Automatic Electric Ltd. (AE). AE products carry AE’s normal warranty of 18 months from supply or 12 months from commissioning, whichever is earlier.

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Key features

Coils made from high grade CRGO silicon steel and 99.9% pure copper
Output voltage variation smooth, continuous, breakless and linearly proportional to angular rotation
Negligible waveform and power factor distortion; high efficiency
Excellent short time overload capacity
Remote operation possible by motorisation (240 V AC Step-Syn motor, 60 rpm)
Available as flush open, portable enclosed or in-tank oil cooled construction

Applications

Auditoriums, hotels, conference halls, exhibitions, laboratories
AC voltage stabilisers, rectifiers and battery chargers
Temperature control of ovens and furnaces; testing of instruments, relays and circuit breakers
Welding, electro-plating and anodising; colleges and universities

Technical specifications

Electrical ratings
Operating voltage (single phase)	240 V AC, 50 – 60 Hz, 1 ph
Operating voltage (three phase)	415 V AC, 50 – 60 Hz, 3 ph 4 wire
Output voltage (single phase)	0 to 240 V or 0 to 270 V AC
Output voltage (three phase)	0 to 415 V or 0 to 470 V AC
Output current ratings	0.7, 2, 4, 8, 10, 15, 20, 28, 40, 50, 60, 75, 100, 125, 150, 200, 300, 400, 500, 600, 800, 1000, 1200, 1600 A
Oil cooled models	Maximum and continuous current are the same
Air cooled models (maximum / continuous current)	0.7/0.6, 2/1.8, 4/3.8, 8/6.5, 10/9, 15/11.5, 20/16, 28/22 A
Resin moulded models	Designed up to 120% continuous load

Construction types
F	Flush open manual (air cooled), back of panel mounting
P	Portable enclosed manual (air cooled), floor / table mounting
T	In tank manual (oil cooled), sheet steel tank with roller mounting
M suffix	Motor operated version of F, P or T
Three phase	Ganged assemblies of 3 coils; ratings above 200 A use 2/3 or more coils in parallel
Oil cooled only	Ratings of 40 A and above

Motor drive
Motor	240 V AC Step-Syn (synchronous stepper) motor, 60 rpm at 50 Hz
Full sweep time	8, 15, 30, 45, 60, 120 s (standard gear ratios)

General specifications
Operating temperature	0° – 45 °C
Insulation resistance	Not less than 5 MΩ at 500 V DC
Dielectric test	2.5 kV RMS for 1 minute
Storage temperature	-9 °C to 70 °C
Humidity	Up to 95% RH
Conforms to	IS 5142
Oil	Transformer oil conforming to IS 335, IEC 296

Ordering code
Format	Current rating – D – no. of coils – construction (F/P/T) – M (motor) – sweep time
Example	75D3TM15: 75 A, 3 coils (three phase), oil cooled tank, motor drive with 15 s sweep
Example	8D1P: 8 A, 1 coil (single phase), portable, manual
No. of coils	1, 2, 3, 4, 6, 9, 12, 15, 30, 45

Ordering codes

Code	Rating	Description
1F	0.7 – 28 A	1 phase flush manual (air cooled)
1P	2 – 28 A	1 phase portable manual (air cooled)
1T / 2T / 3T	40 – 200 A (1T), 300 – 400 A (2T), 500 – 600 A (3T)	1 phase manual (oil cooled)
1FM	2 – 28 A	1 phase flush motorised (air cooled)
1PM	2 – 28 A	1 phase portable motorised (air cooled)
1TM / 2TM / 3TM	40 – 200 A (1TM), 300 – 400 A (2TM), 500 – 600 A (3TM)	Motorised (oil cooled)
3F	2 – 28 A	3 phase flush manual (air cooled)
3P	2 – 28 A	3 phase portable manual (air cooled)
3T / 6T	40 – 200 A (3T), 300 – 400 A (6T)	3 phase manual (oil cooled)

Datasheets & brochures

↓ Manufacturer catalogue (PDF)