Green Dot Electric Limited

We are engaged in the supply of 1 phase tanked oil cooled transformers that are high in performance, low on maintenance and are in high demand nationwide. We endeavor to satisfy our broad client base fabricating our range as per their designs and specifications.
Technical Specifications:

Rating Amps.	Cat. No. Type	Oil qty.
40	GD-401-T	55 |
50	GD-501-T	90
60	GD-601-T	100
75	GD-751-T	120
100	GD-1001-T	180
150	GD-1501-T	200
200	GD-2001-T	210
300	GD-3001-T	300
400	GD-4001-T	350
600	GD-6001-T	450
800	GD-8001-T	550
1000	GD-10001-T	650
1200	GD-12001-T	750
1400	GD-14001-T	850
1600	GD-16001-T	950

We possess state-of-the-art manufacturing unit well equipped with technologically advanced machinery that helps in the manufacture and supply of 1 phase enclosed air natural cooled transformers. Our range breathes in quality, durability and flawlessness and is extensively used in various industries.
Technical Specifications:

Rating Amps.	Cat. No. Type
2	GD-21-P
4	GD-41-P
8	GD-81-P
10	GD-101-P
15	GD-151-P
20	GD-201-P
28	GD-281-P

Our cutting edge technology and hi-tech machines facilitates us in the fabrication of our 1 phase open/flush transformers adopting innovative designs and standard and customized specifications. These are intricately designed and are appreciated nationwide.
Technical Specifications:

Rating Amps.	Cat. No. Type
1	GD-ll-OB
2	GD-21-OB
4	GD-41-OB
8	GD-81-OB
10	GD-101-OB
15	GD-151-OB
20	GD-201-OB
28	GD-281-OB

Our team of proficient engineers and electricians dexterously design and fabricate our exclusive range of 1 phase variable voltage transformers. These are stringently checked for quality, durability and performance before the final delivery. Our range is in repeatedly demanded nationwide and includes the following technical specifications: Typical 1 phase • Enclosed • Portable • Table Type • General Purpose Lab. use with Lead for Input & Terminal for output say for 10 Amps. Typical 1 phase • Enclosed • Portable • Table Type • General Purpose Lab. use with Lead for Input & Terminals for output say for 28 Amps. GD-281-P.

We are available with 2 amps variable voltage transformers that are in high demand in the domestic market and offers maximum benefit to the end users. These are easy to operate and are also available in customized form. Besides, we also package consignments as per the requirements of our clients. following are some of its technical specifications: • 2 amps. Ph.
• open rollar carbon
• flush
• back of panel gd-21-ob

The 2 phase enclosed/portable unit transformer are designed to perfection and are available in customized form as per the designs and specifications of our clients. Our team of adroit professionals takes every initiative in meticulous designing of our wide range that has successfully claimed the appreciation of our clients nationwide.
Technical Specifications:

Rating Amps.	Cat. No. Type
2	GD-22-P
4	GD-42-P
8	GD-82-P
10	GD-102-P
15	GD-152-P
20	GD-202-P
28	GD-282-P

Our exclusive range of 3 phase enclosed motorized transformers are widely appreciated and are high in quality, durability and performance. These are manufactured using best quality raw material and are stringently checked before the final delivery to the market.
technical specifications:

rating amps.	cat. No. Type
2	gd-23-p-3m-4
4	gd-43-p-3m-4
8	gd-83-p-10m-4
10	gd-103-p-10m-6
15	gd-153-p-10m-8
20	gd-203-p-10m-8
28	gd-283-p-10m-8

We leverage on our rich industrial expertise in supplying a qualitative gamut of 3 phase motorized tanked oil natural cooled units. These are fabricated using best grades of raw material and are in conformation to the industry standards. Our team of packaging experts efficiently packages these equipment assuring complete safety preventing physical damages during transit process.
technical specifications:

ratings amps	cat. No. Type	oil qty. Liters
40	gd-403-t	115
50	gd-503-t	125
60	gd-603-t	130
75	gd-753-t	250
100	gd-1003-t	275
150	gd-1503-t	330
200	gd-2003-t	385
300	gd-3003-t	895
400	gd-4003-t	970
500	gd-5003-t	1400
600	gd-6003-t	1475
800	gd-8003-t	1600
1000	gd-100003-t	1800
1200	gd-120003-t	2000
1400	gd-140003-t	2200
1600	gd-160003-t	2600

The automatic voltage regulators with isolation transformers offered by us are intricately designed and are extensively used in various industries. These are designed as per the industry standards and are in high demand in the domestic market. Our range is rigorously tested before the final delivery ensuring optimum benefit to the end users.

We are engaged in supplying dimmer dot variable transformers that efficiently provides continuous adjustable voltage A.C. supplies. These equipment are designed to perfection and are efficient, reliable method of controlling A.C. voltage from zero to line voltage by amplitude modulation of the A.C. waveform. Our range is extensively used in any testing and development work, over & under voltage tests and is available in the following types: • D-41-P • D-81-P • D-151-P • D-281-P Our dimmer dot variable transformers are ideal for voltage control in power supplies in the following:
• Most versatile source of variable voltage, current, or power in A. C supply system that is widely used in any testing and development work, over & under voltage tests
• Voltage control in power supplies -as for servo-type, automatic voltage stabilizers, constant current supplies, Voltage control for meter calibration, hase-angle control in the calibration watt meters and power-factor meters, D.C rectifiers, electroplating sets
• Voltage control for testing of fans, cables, motors, transformers, lamps, vacuum tubes, dry disk rectifiers, etc.
• DC Motor speed control/ A. C torque motor torque control etc.
• Control of electric heaters and ovens in laboratory, pilot plant, and production line
• Lighting control in theater, auditoriums, photographic studio and dark rooms
Following are the essential features of our range that work as an Auto Transformer:
• Single layer winding on toroidal silicon-steel core
• The control knob is rotated
• A carbon traverses the winding tapping off a portion of the total voltage across the winding
• The brush is in continuous contact with the winding
• The voltage between turns is always less than 1 volt, even in the largest model; in the smallest model it is only about 0.3 volt.
• The discrete voltage increments obtained as the knob is rotated are always less than the voltage between turns
• The brush spans more than one turn
• Change in voltage is practically continuous
• The brush is so designed that excessive heating can not occur in the turns that it spans

We offer dimmer dot variable transformer that breathes in quality and are tested for performance, durability and high performance. These are available in different types and are also customized adhering to the demands and specifications of our valued customers.
following are some of its unique features:
• type d, of 4, 8,15, 20 & 28 amps, ratings, single phase may be used either surface mounted or back of panel mounted
• provides ease in packing and transportation
• standard models are supplied for surface mounting
• can be easily converted to back of panel mounting, simply by removing the shaft locks or clamping rings and loosening the screws thereupon
• the spindle or shaft is then adjusted after inserting from the other end
• spacers/washers are suitably placed so that proper free movement of the moving arm without getting disturbed from the tail end
• stopper is obtained with proper usable length of the carbon from the carbon brush holder available on track • sufficient pressure from the spring holding the carbon brush must be ensured as available on the winding track • longer life
• high initial surge currents
• over loads
• less maintenance our dimmer dot variable transformers are available in are b. A. Sizes, 2, 4 & 6 b. A. Metrics and are tested as per metric conversion and track preparation to ensure the durability, high initial surge currents, over loads and low maintenance of our gamut.

Dimmer dot variable transformers supplied by us are widely used in any testing and development work, over & under voltage tests. These are highly efficient in offering continuously adjustable voltage a. C. Supplies. These are the most versatile source of variable voltage, current, or power in a. C supply system that is required for current, power, heat, light and motor. Our qualitative gamut provides reliable method of controlling a. C. Voltage from zero to line voltage by amplitude modulation of the a. C. Waveform and is available in the following types: • d-41-p • d-81-p • d-151-p • d-281-p our dimmer dot variable transformers are ideal for voltage control in power supplies in the following: • servo-type • automatic voltage stabilizers • constant current supplies • voltage control for meter calibration • phase-angle control in the calibration watt meters and power-factor meters • d. C rectifiers • electroplating sets • testing of fans, cables, motors, transformers, lamps, vacuum tubes, dry disk rectifiers, etc. • dc motor speed control/a. C torque motor torque control etc • control of electric heaters and ovens in laboratory • pilot plant and production line • lighting control in theater • auditoriums • photographic studio and dark rooms
as an auto transformer, our transformers include the following essential features:
• single layer winding on toroidal silicon-steel core
• the control knob is rotated
• a carbon traverses the winding tapping off a portion of the total voltage across the winding
• the brush is in continuous contact with the winding
• the discrete voltage increments obtained as the knob is rotated are always less than the voltage between turns
• the voltage between turns is always less than 1 volt, even in the largest model; in the smallest model it is only about 0. 3 volt.
• the brush spans more than one turn
• change in voltage is practically continuous
• the brush is so designed that excessive heating can not occur in the turns that it spans

Our standard transformers are high in demand in the national market and are designed for 50/60 Hz. Supplies. These are available in high frequency models designed for 400-2500 Hz and are also offered in customized form as per the designs and specifications of our esteemed clients all across the country.
Following are the highlighting attributes of our exclusive gamut:
• All models may be used on higher frequencies up to 400Hz
• Output current derated by 25%
• High frequency models designed for 400-2500 Hz. can be used on frequencies below 50 Hz.
• Flash tested at 2500 Volts R.M.S.
• Operating temperatures of the brush contact can be permitted up to 200°C depending on model
• No load loss Measured in Watts at 50 Hz. for standard models and 400 Hz.
• Driving torque turns the shaft
• Overload protection
• Designed for arduous industrial use
• protective devices be fitted such as a circuit breaker in the input circuit & and H.R.C. fuse in the load circuit
• Improved core materials allow high inrush transient surges of up to 10 times the rated current to occur at switch on
• Input protective devices are capable of handling 1000% overload for one cycle of the supply frequency
• Input voltage of 250 V and delivering of 10 amps to a load at 50 V (0.5 KVA)
• Draws a current of only 2 amps from the supply mains • 10 amp fuse laced in the input circuit does not rupture until the load current reaches 50 amps
• The load circuit is fused with an H.R.C. fuse link

The three phase open type variable transformers available with us are fabricated in conformation to the industry standards using best grades of raw material. These are high in demand in the domestic market and are extensively used in various industries.
technical specifications:

type	capacity in amps.	input volts	output volts	phase	a	b	c	d	e	f	weight
gd-403-t-1om	40	415	0-470	3	1025	620	500	520	400	780	80. 5
gd-503-t-10m	50	415	0-470	co	1025	620	500	520	400	780	80. 5
gd-603-t-10m	60	415	0-470	3	1400	900	790	520	400	780
gd-753-t-10m	75	415	0-470	co	1400	900	790	520	400	780
gd-1003-t-10m	100	415	0-470	3	1940	2600	1600	1540	900	1240
gd-1503-t-10m	150	415	0-470	co	1940	2600	1600	1540	900	1240
gd-2003-t-10m	200	415	0-470	3	1940	2600	1600	1540	900	1240
gd-3003-t-1om	300	415	0-470	co	1940	2600	1600	1540	900	1240
gd-4003-t-10m	400	415	0-470	3	1940	2600	1600	1400	800	1480
gd-5003-t-10m	500	415	0-470	co	2230	2215	1555	1455	800	1480
gd-6003-t-10m	600	415	0-470	3	2230	2215	1555	1455	800	1480

The variable voltage transformers (with digital display) available with us are in high demand in different labs, defense institution, electric test benches etc and offers digital volts, amps, watts, frequency or any combination of displays. Our range is also fabricated in adherence to the designs and specifications of pour esteemed clients.