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Strap Magnetic Circuits of ТЛ Type for Three-Phase Transformers

Magnetic circuits are designed for use in AC small-power three-phase transformers with power line frequency of 50 and 400 Hz, operating conditions of which are the following:

operating temperature limit from -60 to +150°С;
relative air humidity up to 98% at temperature up to 40°С;
atmospheric pressure reduced to 5 mm Hg at ambient temperature up to 150°С;
vibration within the range from 5 to 5,000 Hz with acceleration up to 40g;
multiple impacts with acceleration up to 150g;
single impacts with acceleration up to 1,000g;
linear loads with acceleration up to 100g;
hoarfrost and dew influence;
salt spray atmosphere influence;
fungal mold influence.

Magnetic circuit production of amorphous nanocrystalline alloys is also possible

Standard Parameters and Dimensions

Magnetic circuits are produced according to Drawing 1, Table 1 and 2 out of hoop steel:

of Grade 3413, ГОСТ 21427.1-83, with a thickness of 0.35 mm for power line frequency of 50 Hz;
of Grade 3422, ГОСТ 21427.4-78, with a thickness of 0.15 mm for power line frequency of 400 Hz;
Chamfering 0.1х450 is allowed on core rod butt ends;
Outer core rod displacement relative to each other for the value К in defined position of middle core rod is allowed.

Magnetic circuit surfaces except specified 3, 2 are covered with enamel ЭЭП-140 of light grey colour. Use of enamels of other brands is allowed.

Table 1
Magnetic circuit reference designation	К	a		h	h1	c	L*	H*	B		R_max	Magnetic circuit weight, kg
Magnetic circuit reference designation	К	Nomin.	Extr. dev.	R_max	Nomin.	Nomin.	L*	H*	Nomin.	Extr. dev.	R_max	Magnetic circuit weight, kg
ТЛ12,5х20-25-0,35-50	+0,3	12,5	+0,24 -0,43	25,0	12,5	25	87,5	50,0	20	+0,84	1,2	0,485
ТЛ12,5х20-29-0,35-50				29,0	12,5			54,0				0,505
ТЛ12,5х20-33-0,35-50				33,0	16,5			58,0				0,525
ТЛ12,5х20-38,5-0,35-50				38,5	16,5			63,6				0,550
ТЛ12,5х20-440,35-50				44,0	22,0			69,0				0,580

ТЛ16х25-32-0,35-50	+0,5	16,0	+0,24 -0,43	32,0	16,0	32	112	64,0	25	+0,84	1,3	1,000
ТЛ16х25-37-035-50				37,0	16,0			69,0				1,050
ТЛ16х25-42-0,35-50				42,0				74,0				1,100
ТЛ16х25-49-0,35-50				49,0	21,0			81,0				1,180
ТЛ16х25-56-0,35-50				56,0	28,0			88,0				1,260

ТЛ20х32-40-0,35-50	+0,7	20	+0,28 -0,52	40,0	20,0	40	140	80,0	32	+1,0	1,4	1,960
ТЛ20х32-47-0,35-50				47,0	20,0			87,0				2,070
ТЛ20х32-54-0,35-50				54,0	27,0			94,0				1,170
ТЛ20х32-62-0,35-50				62,0	27,0			102,0				2,320
ТЛ20х32-70-0,35-50				70,0	35,0			110,0				2,480

ТЛ25х40-50-0,35-50	+,9	25	+0,28 -0,52	50,0	25,0	50	175	100,0	40	+1,0	1,5	3,82
ТЛ25х40-58-0,35-50				58,0	25,0			108,0				3,96
ТЛ25х40-66-0,35-50				66,0	33,0			116,0				4,15
ТЛ25х40-77-0,35-50				77,0	33,0			127,0				4,45
ТЛ25х40-88-0,35-50				88,0	44,0			138,0				4,75

ТЛ32х40х64-0,35-50	+1,0	32	+0,34 -0,62	64	32	64	224	128	40	+1,0		6,10
ТЛ32х40х74-0,35-50				74	32			138				6,45
ТЛ32х40х84-0,35-50				84	42			148				6,80
ТЛ32х40х97-0,35-50				97	42			161				7,25
ТЛ32х40х110-0,35-50				110	55			174				7,65

Table 2
Magnetic circuit reference designation	К	a		h	h1	c	L*	H*	B		R_max	Magnetic circuit weight, kg
Magnetic circuit reference designation	К	Nomin.	Extr. dev.	Nomin.	Nomin.	Nomin.	L*	H*	Nomin.	Extr. dev.	R_max	Magnetic circuit weight, kg
ТЛ5х10-14-0,15-400	0,4	5,0	+0,16 -0,30	14	7	14	43,0	24	10,0	+0,58	0,5	0,049
ТЛ5х10-16-0,15-400				16	7			26				0,051
ТЛ5х10-18-0,15-400				18	9			28				0,053
ТЛ5х10-21-0,15-400				21	9			31				0,057
ТЛ5х10-24-0,15-400				24	12			34				0,066

ТЛ6,5х10-16-0,15-400	0,4	6,5	+0,20 -0,36	16	8	16	51,5	29	10,0	+0,58	0,6	0,072
ТЛ6,5х10-18-0,15-400				18	8			31				0,075
ТЛ6,5х10-20-0,15-400				20	10			33				0,078
ТЛ6,5х10-23-0,15-400				23	10			36				0,083
ТЛ6,5х10-26-0,15-400				26	13			39				0,087

ТЛ8х12,5-18-0,15-400	0,4	8,0	+0,20 -0,36	18	9	18	60,	34	12,5	+,70	0,7	0,120
ТЛ8х12,5-21-0,15-400				21	9			37				0,151
ТЛ8х12,5-24-0,15-400				24	12			40				0,163
ТЛ8х12,5-28-0,15-400				28	12			44				0,172
ТЛ8х12,5-32-0,15-400				32	16			48				0,170

ТЛ10х16-20-0,15-400	0,4	10,0	+0,20 -0,36	20,0	10,0	20	70,0	40,0	16	+0,7	0,8	0,240
ТЛ10х16-23-0,15-400				23,0	10,0			43,0				0,250
ТЛ10х16-26-0,15-400				26,0	13,0			46,0				0,260
ТЛ10х16-31-0,15-400				31,0	13,0			51,0				0,275
ТЛ10х16-36-0,15-400				36,0	18,0			56,0				0,290

ТЛ12,5х20-25-0,15-400	0,5	12,5	+0,24 -0,43	25,0	12,5	25	87,5	50	20	+0,84	0,9	0,470
ТЛ12,5х20-29-0,15-400				29,0	12,5			54				0,490
ТЛ12,5х20-33-0,15-400				33,0	16,5			58				0,510
ТЛ12,5х20-38-0,15-400				38,5	16,5			63,5				0,525
ТЛ12,5х20-44-0,15-400				44,0	22,0			69				0,560

ТЛ16х25-32-0,15-400	0,6	16,0	+0,24 -0,43	32,0	16,0	32	112	64,0	25	+0,84	1,0	0,970
ТЛ16х25-37-0,15-400				37,0	16,0			69,0				1,020
ТЛ16х25-42-0,15-400				42,0	21,0			74,0				1,070
ТЛ16х25-49-0,15-400				49,0	21,0			81,0				1,140
ТЛ16х25-56-0,15-400				56,0	28,0			88,0				1,220

ТЛ20х32-40-0,15-400	0,7	20	+0,28 -0,52	40,0	20,0	40	140	80,0	32	+1,0	1,1	1,900
ТЛ20х32-47-0,15-400				47,0	20,0			87,0				2,000
ТЛ20х32-54-0,15-400				54,0	27,0			94,0				2,100
ТЛ20х32-62-0,15-400				62,0	27,0			102,0				2,250
ТЛ20х32-70-0,15-400				70,0	35,0			110,0				2,400

ТЛ25х40-50-0,15-400	+0,8	25	+0,28 -0,52	50,0	25,0	50	175	100,0	40	1,0	1,2	3,700
ТЛ25х40-58-0,15-400				58,0	25,0			108,0				3,850
ТЛ25х40-66-0,15-400				66,0	33,0			116,0				4,00
ТЛ25х40-77-0,15-400				77,0	33,0			127,0				4,400
ТЛ25х40-88-0,15-400				88,0	44,0			138,0				4,60

ТЛ32х40-64-0,15-400	+1,0	32	+0,34-0,62	64	32	64	224	128	40	+1,0	1,3	5,900
ТЛ32х40-74-0,15-400				74	32			138				6,250
ТЛ32х40-84-0,15-400				84	42			148				6,600
ТЛ32х40-97-0,15-400				97	42			161				7,000
ТЛ32х40-110-0,15-400				110	55			174				7,600

1.2. Magnetic circuit reference designation consists of initial letters of words "three-phase" (T), "strap" (Л) and figures, which designate accordingly rod dimensions, aperture height, band thickness and frequency, at which magnetic circuit is inspected for compliance with requirements of existing standard.

Specification

2.1.1 General requirements
2.1.1. Magnetic circuit should be produced according to the requirements of existing standard.
2.1.2. Materials and semifinished goods used during magnetic circuit production should have appropriate documentation, which confirms their operability in conditions at least equal to the requirements of existing standard.
2.2. Design requirements
2.2.1. Magnetic circuits design and dimensions should comply with Drawing 1 and Table 1 and 2.
2.2.2. Magnetic circuit surface should be without any dirt marks, dints and other mechanical damages and also without corrosion marks.
2.2.3. Magnetic circuits should be monolithic, butt end opening is not allowed.
Note: 1. Gaps between plates are allowed in core mass.
2. Plates recess by width up to 5% of rod thickness is allowed.
3. Glueing of plates, which are separated during magnetic circuit butt end depreservation, with БФ-4 glue according to ГОСТ 12127-74 or equivalent is allowed by consumer.
2.2.4. Magnetic circuit weight should comply with the data specified in Table 1 and 2.

Required Electrical Parameters

2.3.1. Excitation current value and power loss of magnetic circuits should comply with data specified in Table 3 for magnetic circuits with frequency of 50 Hz and in Table 4 for magnetic circuits with frequency of 400 Hz.

Table 3
Magnetic circuit dimension type	Induction,, Wb/m²	Current value, A, not more than	Power loss, W, not more than	Impressed voltage, phase, V	Winding turn number W₁=W₂	Winding wire diameter, mm
ТЛ12,5х20-25	1,5	3х0,036	-	73,5	950	0,2
ТЛ12,5х20-29		3х0,038
ТЛ12,5х20-33		3х0,040
ТЛ12,5х20-38,5		3х0,042
ТЛ12,5х20-44		3х0,044

ТЛ16х25-32	1,5	3х0,070	-	73,5	591	0,29
ТЛ16х25-37		3х0,073
ТЛ16х25-42		3х0,076
ТЛ16х25-49		3х0,081
ТЛ16х25-56		3х0,086

ТЛ20х32-40	1,5	3х0,130	5,0	73,5	370	0,44
ТЛ20х32-47		3х0,137	5,2
ТЛ20х32-54		3х0,144	5,5
ТЛ20х32-62		3х0,153	5,8
ТЛ20х32-70		3х0,162	6,1

ТЛ25х40-50	1,45	3х0,215		73,5	245	0,8
ТЛ25х40-58		3х0,225
ТЛ25х40-66		3х0,235
ТЛ25х40-77		3х0,250
ТЛ25х40-88		3х0,267

ТЛ32х40х64				73,5	198	1,0
ТЛ32х40х74
ТЛ32х40х84
ТЛ32х40х97
ТЛ32х40х110

Table 4
Magnetic circuit dimension type	Induction, Wb/m²	Current value, A, not more than	Power loss, W, not more than	Impressed voltage, phase, V	Winding turn number W₁=W₂	Winding wire diameter, mm
ТЛ5х10-14	1,4	3х0,058	-	73,5	655	0,11
ТЛ5х10-16		3х0,060
ТЛ5х10-18		3х0,062
ТЛ5х10-21		3х0,065
ТЛ5х10-24		3х0,068

ТЛ6,5х10-16	1,4	3х0,080	-	73,5	508	0,15
ТЛ6,5х10-18		3х0,082
ТЛ6,5х10-20		3х0,084
ТЛ6,5х10-23		3х0,07
ТЛ6,5х10-26		3х0,090

ТЛ8х12,5-18	1,4	3х0,125	3,9	73,5	327	0,21
ТЛ8х12,5-21		3х0,130	4,1
ТЛ8х12,5-24		3х0,135	4,3
ТЛ8х12,5-28		3х0,140	4,6
ТЛ8х12,5-32		3х0,145	4,9

ТЛ10х16-20	1,4	3х0,210	6,9	73,5	204	0,35
ТЛ10х16-23		3х0,217	7,2
ТЛ10х16-26		3х0,225	7,6
ТЛ10х16-31		3х0,232	8,2
ТЛ10х16-36		3х0,240	8,8

ТЛ 12,5х20-25	1,32	3х0,290	11,8	73,5	139	0,51
ТЛ 12,5х20-29		3х0,300	12,4
ТЛ 12,5х20-33		3х0,310	13,1
ТЛ 12,5х20-38,5		3х0,320	13,8
ТЛ 12,5х20-44		3х0,330	14,6

ТЛ16х25-32	1,13	3х0,330	17,8	73,5	102	0,64
ТЛ16х25-37		3х0,342	18,6
ТЛ16х25-42		3х0,355	19,5
ТЛ16х25-49		3х0,372	20,8
ТЛ16х25-56		3х0,390	22,2

ТЛ20х32-40	0,96	3х0,380	24,4	73,5	76	0,80
ТЛ20х32-47		3х0,395	25,9
ТЛ20х32-54		3х0,410	27,5
ТЛ20х32-62		3х0,427	29,2
ТЛ20х32-70		3х0,445	31,0

ТЛ25х40-50	0,81	3х0,450	33,6	73,5	57	0,93
ТЛ25х40-58		3х0,470	35,5
ТЛ25х40-66		3х0,490	37,5
ТЛ25х40-77		3х0,517	40,0
ТЛ25х40-88		3х0,545	42,0

ТЛ32х40х64	0,73	3х0,490	44,5	73,5	49	1,16
ТЛ32х40х74		3х0,515	47,2
ТЛ32х40х84		3х0,540	50,0
ТЛ32х40х97		3х0,570	53,0
ТЛ32х40х110		3х0,600	56,0

About the Company

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Welcome to Our Website!

We offer for Your attention a wide range of magnetic circuits of types ПЛ, ПЛР, ПЛМ, ШЛ, ШЛМ, ШЛР, ШЛО, ШЛП, ОЛ and ТЛ, three-phase transformers, multipurpose non-contact loading transformer etc.

Additional reference information and electrical engineering articles are also represented on the website in the Information section.

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The Director of Komplekt Transformator LLC

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