Transformers – Twiclo Electrical Industries

33 kV CURRENT TRANSFORMERS FOR HIGHER CURRENT RATIO

admin — Tue, 14 Jun 2022 16:19:48 +0000

33 kV CURRENT TRANSFORMERS FOR HIGHER CURRENT RATIO

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated
3. Manufacturer’s Designation	:	COF
4. Rated Voltage/Highest Voltage	:	33 kV / 36 kV *
5. Rated Primary Current	:	As per spec Amps *
6. Secondary Core details	:
a. Number of Cores	:	One
b. Rated Secondary Current	:	1 or 5 Amp *
c. Rated Output	:	as per spec VA *
d. Class of accuracy	:	as per spec VA *
e. Accuracy limit factor	:	as per spec VA *
7. Turns Ratio	:	Nominally same as transformation ratio
8. Short time thermal current & its duration	:	As per spec kA
9. Rated dynamic current (peak value)	:	2.5 times of short time thermal current kA*
10. a. Rated continuous thermal current	:	Same as rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
11. Impulse withstand test voltage	:	170 kV (Peak)*
12. One-minute power frequency dry/wet withstand test voltage on primary	:	70 kV *
13. One-minute power frequency withstand test voltage on secondary	:	3 kV *
14. Total creepage of insulator	:	900 mm minimum *
15. Whether CT is hermetically sealed	:	Yes.
16. Quantity of oil	:	Approx. 16 Liters.
17. Total weight	:	Approx. 70 Kgs
18. Mounting Details	:	As per drawing
19. Equipment conforms to specification	:	IS 2705
20. Overall dimensions	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

33 kV CURRENT TRANSFORMERS DUAL RATIO

admin — Tue, 14 Jun 2022 16:18:23 +0000

33 kV CURRENT TRANSFORMERS DUAL RATIO

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated
3. Manufacturer’s Designation	:	COD
4. Rated Voltage/Highest Voltage	:	33 kV / 36 kV *
5. Rated Primary Current	:	As per spec Amps *
6. Secondary Core details
a. Number of Cores	:	Two
		Core 1	Core 2
b. Rated Secondary Current	:	1 or 5 Amp *	1 or 5 Amp *
c. Rated Output	:	as per spec VA *	as per spec VA *
d. Class of accuracy	:	as per spec VA *	as per spec VA *
e. Accuracy limit factor	:	as per spec VA *	as per spec VA *
7. Turns Ratio	:	Nominally same as transformation ratio
8. Short time thermal current & its duration	:	As per spec kA
9. Rated dynamic current (peak value)	:	2.5 times of short time thermal current kA*
10. a. Rated continuous thermal current	:	Same as rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
11. Impulse withstand test voltage	:	170 kV(Peak)*
12. One-minute power frequency dry/wet withstand test voltage on primary	:	70 kV *
13. One-minute power frequency withstand test voltage on secondary	:	3 kV *
14. Total creepage of insulator	:	900 mm minimum *
15. Whether CT is hermetically sealed	:	Yes.
16. Quantity of oil	:	Approx. 16 Liters.
17. Total weight	:	Approx. 70 Kgs
18. Mounting Details	:	As per drawing
19. Equipment conforms to specification	:	IS 2705
20. Overall dimensions	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

33kV SINGLEPHASE POTENTIAL TRANSFORMERS

admin — Tue, 14 Jun 2022 16:17:05 +0000

33kV SINGLEPHASE POTENTIAL TRANSFORMERS

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Manufacturer’s type & Designation	:	Oil Filled, Vacuum Impregnated: VOD
3. Nature of service	:	Outdoor *
4. Type of Cooling	:	ON *
5. System characteristics	:
a. Rated system voltage	:	33kV
b. Highest system voltage	:	36 kV
c. Rated system frequency	:	50 Hz
d. Nature of neutral earthing	:	Effective
6. Rated voltage ratio	:	(33000/√3) / (110/√3)*
7. Winding Connections	:	NA as single phase
8. Rated Burden	:	As per spec VA *
9. Class of Accuracy	:	As per spec *
10. Polarity	:	Not applicable
11. Rated voltage factor and time	:	1.2 continuous; 1.5 / 30 sec *
12. Limits of ratio and phase error	:	Within limits specified by IS
13. Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary	:	Within limits specified by IS
14. Secondary Core details	:
a. Type	:	Outdoor, Glazed Porcelain to IS 5621. *
b. Electrical characteristics	:	To IS 5621 *
c. Total creepage distance	:	900 mm minimum. *
15. One-minute power frequency withstand test on primary winding	:	70 kV induced; 3 kV applied. *
16. One-minute power frequency withstand test on secondary winding	:	3 kV. *
17. High voltage impulse withstand test on primary windings	:	170 kV. *
18. Oil
a. Specification	:	To IS 335 *
b. Quantity for First Filling	:	Approx. 30 Litres.
19. Total weight of P.T. with oil	:	Approx. 90 Kgs.
20. Equipment conforms to specification	:	IS 3156
21. Outline dimensional drawing with mounting details	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11 kV INDOOR METERING SET

admin — Tue, 14 Jun 2022 16:12:05 +0000

11 kV INDOOR METERING SET

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated : MOD/CB
3. Nature of service	:	Outdoor *
4. Type of Cooling	:	ON *
5. System characteristics	:
a. Rated system voltage	:	11 kV
b. Highest system voltage	:	12 kV
c. Rated system frequency	:	50 Hz
6. Oil
a. Specification	:	To IS 335 *
b. Quantity for First Filling	:	Approx. 60 liters.
7. Total weight with oil	:	Approx. 200 Kgs.
8. Outline dimensional drawing with mounting details	:	As per drawing
9. Mounting Details	:	As per drawing
10. Overall dimensions	:	As per drawing
a.) Voltage Transformer
1. Rated voltage ratio	:	(11000) / (110) *
2. Winding Connections	:	Star-Star
3. Rated Burden	:	10 VA *
4. Class of Accuracy	:	0.2*
5. Rated voltage factor and time	:	1.2 continuous *
6. Limits of ratio and phase error	:	Within limits specified by IS
7. Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary	:	Within limits specified by IS
8. H.V. Bushing Characteristics
a. Type	:	Outdoor/ Indoor, Glazed Porcelain *
b. Make	:	Suitable indigenous
c. Electrical characteristics	:	To IS 2099 / 1996 *
9. One-minute power frequency withstand test on primary winding kV rms	:	28 *
10. One-minute power frequency withstand test on secondary winding kV rms	:	3 *
11. High voltage impulse withstand test on primary windings kV peak	:	75 *
12. Reference specification to which the equipment conform	:	IS 3156 / 1992
b.) Current Transformer
1. Rated Voltage/Highest Voltage	:	11 kV / 12 kV *
2. Rated Primary Current	:	Amps *
3. Secondary Core details
a. Rated Secondary Current	:	5 Amp *
b. Rated Output	:	Rated Output
c. Class of accuracy	:	0.2S *
d. Accuracy limit factor	:	NA *
4. Turns Ratio	:	Nominally same as transformation ratio
5. Short time thermal current & its duration	:	To suit system fault level
6. Rated dynamic current (peak value)	:	2.5 * Short Time Current Rating
7. a. Rated continuous thermal current	:	120% of rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
8. Impulse withstand test voltage kV Peak	:	75 *
9. One-minute power frequency dry/wet withstand test voltage on primary kV rms	:	28 *
10. One-minute power frequency withstand test voltage on secondary kV rms	:	3 *
11. Reference specification to which the equipment conform	:	IS 2705 / 1992

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11 kV SEMI-INDOOR METERING SET

admin — Tue, 14 Jun 2022 16:10:21 +0000

11 kV SEMI-INDOOR METERING SET

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated : MOD/CB
3. Nature of service	:	Outdoor *
4. Type of Cooling	:	ON *
5. System characteristics	:
a. Rated system voltage	:	11 kV
b. Highest system voltage	:	12 kV
c. Rated system frequency	:	50 Hz
6. Oil
a. Specification	:	To IS 335 *
b. Quantity for First Filling	:	Approx. 60 liters.
7. Total weight with oil	:	Approx. 200 Kgs.
8. Outline dimensional drawing with mounting details	:	As per drawing
9. Mounting Details	:	As per drawing
10. Overall dimensions	:	As per drawing
a.) Voltage Transformer
1. Rated voltage ratio	:	(11000) / (110) *
2. Winding Connections	:	Star-Star
3. Rated Burden	:	10 VA *
4. Class of Accuracy	:	0.2*
5. Rated voltage factor and time	:	1.2 continuous *
6. Limits of ratio and phase error	:	Within limits specified by IS
7. Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary	:	Within limits specified by IS
8. H.V. Bushing Characteristics
a. Type	:	Outdoor/ Indoor, Glazed Porcelain *
b. Make	:	Suitable indigenous
c. Electrical characteristics	:	To IS 2099 / 1996 *
9. One-minute power frequency withstand test on primary winding kV rms	:	28 *
10. One-minute power frequency withstand test on secondary winding kV rms	:	3 *
11. High voltage impulse withstand test on primary windings kV peak	:	75 *
12. Reference specification to which the equipment conform	:	IS 3156 / 1992
b.) Current Transformer
1. Rated Voltage/Highest Voltage	:	11 kV / 12 kV *
2. Rated Primary Current	:	Amps *
3. Secondary Core details
a. Rated Secondary Current	:	5 Amp *
b. Rated Output	:	Rated Output
c. Class of accuracy	:	0.2S *
d. Accuracy limit factor	:	NA *
4. Turns Ratio	:	Nominally same as transformation ratio
5. Short time thermal current & its duration	:	To suit system fault level
6. Rated dynamic current (peak value)	:	2.5 * Short Time Current Rating
7. a. Rated continuous thermal current	:	120% of rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
8. Impulse withstand test voltage kV Peak	:	75 *
9. One-minute power frequency dry/wet withstand test voltage on primary kV rms	:	28 *
10. One-minute power frequency withstand test voltage on secondary kV rms	:	3 *
11. Reference specification to which the equipment conform	:	IS 2705 / 1992

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

33kV Current Transformer

admin — Mon, 13 Jun 2022 17:28:27 +0000

33kV CURRENT TRANSFORMERS

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated
3. Manufacturer’s Designation	:	COD
4. Rated Voltage/Highest Voltage	:	33 kV / 36 kV *
5. Rated Primary Current	:	As per spec Amps *
6. Secondary Core details	:
a. Number of Cores	:	One
b. Rated Secondary Current	:	1 or 5 Amp *
c. Rated Output	:	as per spec VA *
d. Class of accuracy	:	as per spec VA *
e. Accuracy limit factor	:	as per spec VA *
7. Turns Ratio	:	Nominally same as transformation ratio
8. Short time thermal current & its duration	:	As per spec kA
9. Rated dynamic current (peak value)	:	2.5 times of short time thermal current kA*
10. a. Rated continuous thermal current	:	Same as rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
11. Impulse withstand test voltage	:	170 kV (Peak)*
12. One-minute power frequency dry/wet withstand test voltage on primary	:	70 kV *
13. One-minute power frequency withstand test voltage on secondary	:	3 kV *
14. Total creepage of insulator	:	900 mm minimum *
15. Whether CT is hermetically sealed	:	Yes.
16. Quantity of oil	:	Approx. 16 Liters.
17. Total weight	:	Approx. 70 Kgs
18. Mounting Details	:	As per drawing
19. Equipment conforms to specification	:	IS 2705
20. Overall dimensions	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11kV Current Transformer Dual Ratio

admin — Mon, 13 Jun 2022 17:26:44 +0000

11 kV CURRENT TRANSFORMERS DUAL RATIO

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated
3. Manufacturer’s Designation	:	COD
4. Rated Voltage/Highest Voltage	:	11 kV / 12 kV *
5. Rated Primary Current	:	As per spec Amps *
6. Secondary Core details
a. Number of Cores	:	Two
		Core 1	Core 2
b. Rated Secondary Current	:	1 or 5 Amp *	1 or 5 Amp *
c. Rated Output	:	as per spec VA *	as per spec VA *
d. Class of accuracy	:	as per spec VA *	as per spec VA *
e. Accuracy limit factor	:	as per spec VA *	as per spec VA *
7. Turns Ratio	:	Nominally same as transformation ratio
8. Short time thermal current & its duration	:	As per spec kA
9. Rated dynamic current (peak value)	:	2.5 times of short time thermal current kA*
10. a. Rated continuous thermal current	:	Same as rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
11. Impulse withstand test voltage	:	75 kV(Peak)*
12. One-minute power frequency dry/wet withstand test voltage on primary	:	28 kV *
13. One-minute power frequency withstand test voltage on secondary	:	3 kV *
14. Total creepage of insulator	:	300 mm minimum *
15. Whether CT is hermetically sealed	:	Yes.
16. Quantity of oil	:	Approx. 12 Liters.
17. Total weight	:	Approx. 50 Kgs
18. Mounting Details	:	As per drawing
19. Equipment conforms to specification	:	IS 2705
20. Overall dimensions	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11kV Single Phase Potential Transformer

admin — Mon, 13 Jun 2022 17:24:25 +0000

11kV Single Phase Potential Transformer

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Manufacturer’s type & Designation	:	Oil Filled, Vacuum Impregnated: VOD
3. Nature of service	:	Outdoor *
4. Type of Cooling	:	ON *
5. System characteristics	:
a. Rated system voltage	:	11kV
b. Highest system voltage	:	12 kV
c. Rated system frequency	:	50 Hz
d. Nature of neutral earthing	:	Effective
6. Rated voltage ratio	:	(11000/√3) / (110/√3)*
7. Winding Connections	:	NA as single phase
8. Rated Burden	:	As per spec VA *
9. Class of Accuracy	:	As per spec *
10. Polarity	:	Not applicable
11. Rated voltage factor and time	:	1.2 continuous; 1.5 / 30 sec *
12. Limits of ratio and phase error	:	Within limits specified by IS
13. Temperature rise of top oil at 1.2 times rated primary voltage with rated secondary	:	Within limits specified by IS
14. Secondary Core details	:
a. Type	:	Outdoor, Glazed Porcelain to IS 5621. *
b. Electrical characteristics	:	To IS 5621 *
c. Total creepage distance	:	300 mm minimum. *
15. One-minute power frequency withstand test on primary winding	:	28 kV induced; 3 kV applied. *
16. One-minute power frequency withstand test on secondary winding	:	3 kV. *
17. High voltage impulse withstand test on primary windings	:	75 kV. *
18. Oil	:
a. Specification	:	To IS 335 *
b. Quantity for First Filling	:	Approx. 15 Litres.
19. Equipment conforms to specification	:	IS 3156
20. Outline dimensional drawing with mounting details	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11kV CURRENT TRANSFORMERS

admin — Mon, 13 Jun 2022 17:22:02 +0000

11kV CURRENT TRANSFORMERS

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Type	:	Outdoor, Oil filled, Vacuum Impregnated
3. Manufacturer’s Designation	:	COD
4. Rated Voltage/Highest Voltage	:	11 kV / 12 kV *
5. Rated Primary Current	:	As per spec Amps *
6. Secondary Core details	:
a. Number of Cores	:	One
b. Rated Secondary Current	:	1 or 5 Amp *
c. Rated Output	:	as per spec VA *
d. Class of accuracy	:	as per spec VA *
e. Accuracy limit factor	:	as per spec VA *
7. Turns Ratio	:	Nominally same as transformation ratio
8. Short time thermal current & its duration	:	As per spec kA
9. Rated dynamic current (peak value)	:	2.5 times of short time thermal current kA*
10. a. Rated continuous thermal current	:	Same as rated primary current *
b. Temperature rise over ambient	:	Within limits prescribed by IS. *
11. Impulse withstand test voltage	:	75 kV(Peak)*
12. One-minute power frequency dry/wet withstand test voltage on primary	:	28 kV *
13. One-minute power frequency withstand test voltage on secondary	:	3 kV *
14. Total creepage of insulator	:	300 mm minimum *
15. Whether CT is hermetically sealed	:	Yes.
16. Quantity of oil	:	Approx. 12 Liters.
17. Total weight	:	Approx. 50 Kgs
18. Mounting Details	:	As per drawing
19. Equipment conforms to specification	:	IS 2705
20. Overall dimensions	:	As per our drawing

Note: Only items marked * are guaranteed. All others are indicative and subject to change.

11kV 3 Phase Potential Transformer

admin — Mon, 13 Jun 2022 17:19:55 +0000

11kV 3PHASE POTENTIAL TRANSFORMERS

1. Name and address of Manufacturer	:	Twiclo Electrical Industries, Raipur
2. Manufacturer’s type & Designation	:	Outdoor, Oil filled, Vacuum Impregnated;VOD
3. Nature of service	:	Outdoor *
4. Type of Cooling	:	ON *
5. System characteristics	:
a. Rated system voltage	:	11 kV
b. Highest system voltage	:	12 kV
c. Rated system frequency	:	50 Hz
d. Nature of neutral earthing	:	Effective
6. Rated voltage ratio	:	11000 / 110 *
7. No of Phases	:	Three *
8. No of windings per phase	:	Two *
9. Winding Connections	:	Star – Star
10. Type of transformer	:	Earthed
11. Rated Burden per phase	:	As per requirement
12. Class of Accuracy	:	As per requirement
13. Polarity	:	Not applicable
14. Rated voltage factor and time	:	1.2 continuous *
15. Limits of ratio and phase error	:	Within limits specified by IS
16. Temperature rise of top oil at 1.1 times rated primary voltage with rated secondary	:	Within limits specified by IS
17. H.V. Insulation characteristic of porcelain bushing
a. Type	:	Outdoor, Glazed Porcelain to IS 2099. *
b. Make	:	Suitable indigenous
c. Electrical characteristics	:	To IS 2099 / 3347 *
d. Total creepage distance	:	192 mm minimum. *
18. One-minute power frequency withstand test on primary winding	:	28 kV. *
19. One-minute power frequency withstand test on secondary winding	:	3 kV. *
20. High voltage impulse withstand test on primary Windings	:	75 kV. *
21. One-minute power frequency withstand test on secondary winding	:	Oil :
a. Specification	:	To IS 335 *
b. Quantity for First Filling	:	Approx. 30 Litres.
22. Total weight of P.T. with oil	:	Approx. 90 kgs.
23. Reference specification	:	IS 3156
24. Outline dimensional drawing with mounting details	:	As per drawing
24. The potential transformers shall carry 50% above the rated burden continuously without injury but the accuracies will not be maintained at these higher burdens.

Note: Only items marked * are guaranteed. All others are indicative and subject to change.