Shanghai Huabang Industrial Business Network - 220KV current transformer

[220KV current transformer]LB7-220(W1, W2) High voltage current transformer

2026-6-20 11:48:15

The LB7-220 (W1, W2) current transformer has the following characteristics:
1. The secondary iron core adopts high-quality imported silicon steel sheets with stable performance.
2. The secondary combination forms are diverse, which can fully meet the measurement and protection needs of ordinary lines, connecting lines, and user lines in the power system.
3. The product adopts a fully sealed structure, effectively preventing transformer oil and body from getting damp.
4. Equipped with a multi oil valve. The functions of taking oil samples, draining oil, and injecting oil are integrated into one.
5. The product has low dielectric loss, small partial discharge, and reliable main insulation.
6. Implement the standard GB1208-1997.

Technical parameters of LB7-220 (W1, W2) high-voltage current transformer

model

Rated current ratio (A)

Secondary combination

accuracy level

rated output(VA)

Accurate limit coefficient

frequency

(m)

altitude

(Hz)

Ceramic sleeve creepage distance(mm)

Rated short-time thermal current (kA)

Rated dynamic stability current (kA)

Oil weight/Total weight (kg)

Full turn

tap

LB7-220

LB7-220W1

LB7-220W2

2×600/5

(Tap 2 × 300/5)

5P1/5P2/

5P1/5P1/

0.2(0.2)

5P1

fifty

twenty

fifty

one thousand and seven hundred

four thousand and one hundred

W1:

five thousand and five hundred

W2:

six thousand and three hundred

21-42

(5S)

55-110

365/1180

W1:

365/1300

W2:

365/1400

5P2

fifty

25/13

zero point two

fifty

LB7-220

LB7-220W1

LB7-220W2

2×600/5

(Tap 2 × 300/5)

5P1/5P2/

5P1/5P1/

0.2(0.5)

5P1

fifty

twenty

fifty

one thousand and seven hundred

four thousand and one hundred

W1:

five thousand and five hundred

W2:

six thousand and three hundred

21-42

(5S)

55-110

365/1180

W1:

365/1300

W2:

365/1400

5P2

fifty

25/13

zero point two

fifty

(0.5)

LB7-220

LB7-220W1

LB7-220W2

2×600/5

(Tap 2 × 300/5)

5P1/5P2/

5P1/5P1/

0.2(0.2)/

0.5(0.5)

5P1

fifty

twenty

fifty

one thousand and seven hundred

four thousand and one hundred

W1:

five thousand and five hundred

W2:

six thousand and three hundred

21-42

(5S)

55-110

365/1180

W1:

365/1300

W2:

365/1400

5P2

fifty

25/13

zero point two

fifty

zero point five

fifty

Ordering Instructions
1. Indicate the product model and voltage level;

LB7-220 (W1, W2) High Voltage Current Transformer

[220KV current transformer]LBT-220(GY, W2) high-voltage current transformer

2026-6-20 11:47:47

Technical parameters of LBT-220 (GY, W2) high-voltage current transformer

Overall dimensions

LBT-220 (GY, W2) High Voltage Current Transformer

[220KV current transformer]LCWB7-220(W1) High voltage current transformer

2026-6-20 11:47:01

Technical parameters of LCWB7-220 (W1) high-voltage current transformer

Dimensions of LCWB7-220 (W1) High Voltage Current Transformer

LCWB7-220 (W1) High Voltage Current Transformer

[220KV current transformer]LB9-220(W2) series high-voltage current transformer

2026-6-20 11:43:22

Technical parameters of LB9-220 (W2) series high-voltage current transformer

LB9-220 (W2) series high-voltage current transformer external dimensions

LB9-220 (W2) series high-voltage current transformer

[220KV current transformer]LVB-220W High Voltage Current Transformer

2026-6-20 11:43:04

LVB-220W High Voltage Current Transformer

		LVB-220W High Voltage Current Transformer
Rated voltage kV		two hundred and twenty
Rated insulation level kV		252/460/1050
Rated secondary current A		5 (or 1)
Rated primary current A		2 * 1250, 2 * 750, 2 * 1500
Level combination		B/B/B2/B2/0.2
Secondary performance (protection level)		2*1250/5	2*1250/1	2 * 750/5, 2 * 1500/5	2 * 750/1, 2 * 1500/1
Grade B	Full turn/tap vA	40/25��50/25��	30/20	50/30	30/20
	Accuracy Limit Factor (ALF)	5P20��5P15��	5P20	5P20	5P20
B2 level	Full turn/tap vA	60/30��50/25��	40/25	60/30	40/25
	Accuracy Limit Factor (ALF)	5P25��5P30��	5P25	5P30	5P30
Measurement level performance	Full turn/tap vA	60/30	40/20	60/30	40/20
	Instrument security factor (FS)	five	five	five	five
Short time thermal current kA/3s		2*750A��31.5-50�� Others: 40-63
Dynamic stability current kA		2*750A��80-125�� Others: 100-160
Product dielectric loss rate%		Not more than 0.5%, zero screen to ground not more than 0.7%
Partial discharge pC		Not greater than 10 (not greater than 5pC at 252kV or 220kV)
Creepage distance mm		5040, 6300
Oil weight/total weight kg		200/850��880��
Altitude m		Not exceeding 3000
Terminal withstand load once	horizontal direction	4000N
	Other directions	4000N

LVB-220W High Voltage Current Transformer

[220KV current transformer]LB-220KV High Voltage Current Transformer

2026-6-20 11:42:55

The LB-220KV high-voltage current transformer is an electromagnetic imitation oil tank with a ceramic sleeve structure. It consists of fuel tank, porcelain sleeve, oil storage tank, expander, body, primary outlet device, pressure release device, and secondary outlet box. The primary wire set is in the shape of a "racket" and adopts an oil paper capacitive insulation structure. The transformation of current ratio can be achieved through external series parallel switching using a primary output device, or by switching at the secondary output terminal; The secondary winding is wound around the annular iron core, fitted under the primary winding, and placed in the oil tank. The front of the fuel tank is equipped with a secondary outlet box, the back is a pressure relief device, and the bottom is equipped with a drain valve.

Main technical data of LB-220KV high-voltage current transformer:

Rated voltage (KV)	two hundred and twenty
Polarity, rated frequency (Hz)	Reduce, 50
Rated primary current (A)	300��600��750��800��1000��1250��1500��2000��2400��2500
Rated secondary current (A)	1��5
Accuracy level and combination	5P/5P/5P/5P/5P��0.5��/0.5��0.2��
Rated load (VA)	Protection level 60 (tap 40) Measurement level 50 (tap 30)
Rated insulation level (KV)	252/395/950 (plateau type: 252/460/1050)
Partial discharge level (PC)	��5PC
Instrument security factor	FS �� 10 or FS �� 5
Accurate limit coefficient	ALF��20

LB-220KV High Voltage Current Transformer

[220KV current transformer]LVQB-110/220 outdoor sulfur hexafluoride current transformer

2026-6-20 11:42:38

LVQB-110/220 Outdoor Sulfur Hexafluoride Current Transformer
Overview
LVQB-110 and LVQB-220 SF6 current transformers are electromagnetic current transformers developed and produced to meet the needs of the power market, using SF6 gas as the insulation medium. The products meet the requirements of GB1208-1997 and relevant IEC standards, and have passed the testing of the Electrical Equipment Quality Inspection and Testing Center of the Ministry of Electric Power Industry, as well as the inspection of the State Machinery Industry Bureau and the State Power Company
Technical appraisal. This current transformer plays a role in electrical protection and measurement in AC 50Hz, 110KV, and 220KV high-voltage transmission and transformation systems.

product structure
The overall structure of the product is inverted, mainly composed of three parts: shell, sleeve, and base. The shell is located at the top of the product, and both the primary and secondary windings are installed inside the shell. The primary winding is connected to the secondary winding
Passing through the middle of the group, they are insulated with SF6 gas. The shell is equipotential with the primary circuit and insulated from the base through a sleeve. The secondary winding is fixed inside the shell by insulating components, and its leads are connected to the secondary wiring terminals in the base through metal shielding tubes in the sleeve, for users to connect to measuring or protective loads. The base is equipped with adsorbents, secondary wiring boards, and SF6 pointer type density relays.

Terms of Use
Environmental temperature: -40 ��~+40 ��
Altitude: �� 3000m
Wind pressure: �� 700Pa
Seismic intensity: �� 8 degrees

Ordering Instructions
Please specify when placing an order:
Model and name of current transformer
rated current ratio
Number of required secondary coils, accuracy level, and rated output
External insulation type (silicone rubber insulation, porcelain insulation)
Required spare parts, accessories, and other special requirements
Product quantity and delivery time

Technical parameters of LVQB-220 current transformer

serial number	name	unit	data
one	Rated short-time power frequency withstand voltage (1-minute effective value)	KV	three hundred and ninety-five
two	Rated lightning impulse withstand voltage (full wave 1.2/50 �� s) (peak)	KV	nine hundred and fifty
three	Rated lightning impulse withstand voltage (cut-off 2-5 �� s) (peak value)	KV	one thousand and ninety-three
four	Partial discharge capacity	PC	��5
five	Rated pressure of SF6 gas (20 ��)	MPa	zero point four
six	SF6 gas replenishment pressure (20 ��)	MPa	zero point three five
seven	Creepage distance ratio		��25
eight	Annual SF6 gas leakage rate	mm/kv	��1%
nine	SF6 gas moisture content	V/V	�� 250 × 10-6 (factory control value)
nine	SF6 gas moisture content	V/V	�� 500 × 10-6 (allowable operating value)
ten	Weight of SF6 gas per unit/total weight per unit	kg	18/1200

serial number	Current ratio A	Rated once Current A	Rated secondary Current A	measurement level		protection level		Rated output VA		3S short-term heat Current kA	Rated dynamic stability Constant current kA
				accuracy level	Instrument security factor	accuracy level	Accurate limit coefficient	measurement level	protection level
one	2×300/5	three hundred	5 or 1	0.2 or 0.5 level	FS5 or FS10	5P level or 10P level	twenty	thirty	fifty	thirty-one point five	eighty
		six hundred								fifty	one hundred and twenty-five
two	2×400/5	four hundred								thirty-one point five	eighty
		eight hundred								fifty	one hundred and twenty-five
three	2×500/5	five hundred						forty		thirty-one point five	eighty
		one thousand								fifty	one hundred and twenty-five
four	2×600/5	six hundred								thirty-one point five	eighty
		one thousand and two hundred								fifty	one hundred and twenty-five
five	1500/5	one thousand and five hundred						fifty	sixty
six	2000/5	two thousand						sixty
seven	2500/5	two thousand and five hundred

Note: 1. Each product can come with six secondary coils; 2. When the user has special requirements, they can be resolved through negotiation.

Technical parameters of LVQB-110 current transformer

serial number	name	unit	data
one	Rated short-time power frequency withstand voltage (1-minute effective value)	kV	two hundred and thirty
two	Rated lightning impulse withstand voltage (peak) (full wave 1.2/50 �� s)	kV	five hundred and fifty
three	Rated lightning impulse withstand voltage (peak) (cut-off 2-5 �� s)	kV	six hundred and thirty-three
four	Rated short-time thermal current (effective value)	kA	55-87
five	Rated dynamic stability current (peak value)	kA	100-125
six	Partial discharge capacity	PC	��5
seven	Rated pressure of SF6 gas (20 ��)	MPa	zero point four
eight	SF6 gas replenishment pressure (20 ��)	MPa	zero point three five
nine	Minimum creepage distance	mm/kv	��25
ten	Annual SF6 gas leakage rate		��1%
eleven	SF6 gas moisture content	V/V	�� 250 × 10-6 (factory value)
eleven	SF6 gas moisture content	V/V	�� 500 × 10-6 (operating value)
twelve	Weight of SF6 gas per unit/total weight per unit	kg	7-500

serial number	current ratio A	Rated once Current A	Rated secondary Current A	measurement level		protection level		Rated output VA
				accuracy level	Instrument security factor	accuracy level	Accurate limit coefficient	measurement level	protection level
one	2×200/5	two hundred	5 or 1	Level 0.2 or Level 0.5	FS5 or FS10	5P level or 10P level	twenty	thirty	thirty
		four hundred
two	2×300/5	three hundred							forty
		six hundred
three	2×400/5	four hundred
		eight hundred
four	2×500/5	five hundred							fifty
		one thousand
five	2×600/5	six hundred
		one thousand and two hundred
six	750-1500/5	seven hundred and fifty						thirty	thirty
		one thousand and five hundred						fifty	fifty
seven	1000-2000/5	one thousand						thirty	thirty
		two thousand						fifty	fifty
Note: 1. Each product can come with 4 secondary coils; 2. When the user has special requirements, they can be resolved through negotiation.

Outline drawing of LVQB-110 SF6 current transformer product

Outline drawing of LVQB-220 SF6 current transformer product

[220KV current transformer]LVQB1-220W2(3),LVQB1-110W2(3) series current transformers

2026-6-20 11:42:30

LVQB1-220W2 (3), LVQB1-110W2 (3) series current transformers