Hl-Lcwd-35 Modeloutdoor Oil-Immerse Current Transformer

• Application: Electronic, Instrument, Position Sensor
• Type: Current Transformer
• Phase: Single
• Operation Condition: Outdoor
• Usage: Protection, Measurement
• Winding Form: Multilayer Honeycomb Type
• Model NO.: LCWD-35
• Insulating Medium: Insulating Oil
• Installation: Active Type
• Magnetic Circuit Structure: Combined Type
• Voltage Transformation Principle: Photoelectric Type
• Transport Package: Standard
• Specification: CE
• Trademark: HONLE
• Origin: Zhejiang, China
• HS Code: 8504311000
• Production Capacity: 50000PCS Per Month

Product Description

LCWD-35 Type Oil-immersed Current Transformer

1, General:
LCWD-35 type current transformer is outdoor device of multi-winding, Oil-immersed and porcelain insulation. This current transformer is suitable for AC system with voltage 35kV, 50Hz. Maximum system voltage 36kV as measuring and protection for current and electric power.
L   C  W  D  - 35


2, Structure Summary:
This body of current transformer was installed in the porcelain box filling with the transformer oil, the winding is "8" shape, the below of "8" shape is secondary winding with ring shape iron-core manufactured by steel band, the above of "8" shape is primary winding.
  The body of current transformer and porcelain box with four holes was installed rectangle pedestal made by welding. There is a oil-storage tank upside the porcelain box, the oil-storage tank , porcelain box and oil-storage connect with mechanical means, the joins point was sealed by rubber cushion with excellent elasticity, there is a oil meter upside the oil-storage cubicle, the oil meter show the height of oil with painting when the current transformer never be circulated and the ambient temperature is +20ºC, there is discharge-water stopper at the bottom of the oil-storage cubicle to discharge the coagulate water, and there is a safe gas-channel on the oil-storage cover that will open automatically when excessive pressure inner, there is contact on the wall of oil-storage, the mark L1 means start point and L2 means terminal ,L1start point was insulated by porcelain cover and oil-storage cubicle, and L2 connect with the oil-storage cubicle directly.
There is over-current protecting device on shunt-wound installation with primary winding in oil-storage tank; its main function is preserve the insulation between primary windings from damage thanks to over-current caused by wire-impact current.
The outgoing end marks of secondary wind are K1 and K2, when primary current flow from L1to L2, secondary current flow from K1 to K2 through secondary load.
For prevent the porcelain from damaging of flash current, the current transformer was installed discharging clearance corporately with discharging voltage, the upper protecting electric pole was installed on oil-storage tank, and underside protecting electric pole was installed on pedestal.
There is oil-discharging cover on pedestal using for discharging the oil of transformer, four bolts and flying rings on pedestal provided for hanging up the current transformer.

3, Technical parameters:
1, The current transformers are in accordance with GB1208 and IEC185 standards;
2, Rated insulation level: 40.5/95/170kV;
3, Rated primary current: 15, 20, 30, 40, 50, 75, 100, 150, 200, 300, 400, 600, 700, 800, 1000, 1200A;
4. Rated frequency: 50Hz or 60Hz;
5, Rated secondary current:  5A or 1A
6, Ambient temperature: -45ºC~+45ºC;
7, The relation of secondary load and accurate degree as the table 1
8, All kinds of error limiting of accurate degree as the table 2
9, Using tap of secondary winding to have different current ratio, e.g.: 400-200/5/5A
10,.Pollution class: IV
        Table 1, the relation of rated secondary load and accurate degree

Model and specification	Degree and number	Rated secondary load(Ω)
		0.5grade	1grade	3 grade	10grade
LCW-35-0.5/3	0.5	2	4	/	/
LCWD-35-D/0.5 LCWB-35-0.5/1 LCWQD-35-D/0.5	0.5	1.2	3	/	/
LCWQ-35-0.5/1	1	/	1.2	3
LCW-35-0.5/3	3	/		2	4
LCWD-35-D/0.5 LCWQD-35-D/0.5	D	/	1.2	3

           Table 2, 10% of multiple of current transformer
Biggest secondary current multiple of current transformer
 

Specification	Rated discharge current (A)	Degree and number	Rated secondary loadΩ	10% of multiple	Biggest multiple of secondary current	Coefficient
LCW-35-0.5/3	15-1000	0.5	2	28	36	0.7
	15-1000	3	2	5	12	0.5
LCWD-35-D/0.5	15-750		1.2	15	25	0.5
	1000		1.2	15	28	0.8
LCWD-35-D/0.5	15-600	1	1.2	15	25	0.5
			1.2	30	30	0.56
LCWD-35-D/0.5 LCWQD-35-D/0.5	15-600	D	0.8	36	45	0.56
	750		0.8	36	50	0.67
	1000		0.8	50	55	0.94

   


Note: (1) 90% of multiple of actual product allow the data of table cut down 20%
        (2) When secondary load no rated value, the approximate data of multiple of biggest secondary current can get through following formula: biggest secondary current multiple when N at rated secondary load.


Relative curve for 5P/10P accuracy limit                5P/10P Class VA curve
factor & Secondary load
 

Offered Model	Rated voltage	Rated current ratio (A)	Class combination	Rated  output measure (VA)	Rated  output  Protect (VA)	Heat stability 1s (kA)	Dynamical stability multiple (kA)
LCWD-35	35kV	400-200/5/5	0.5/5P10	30	30	28	70
LCWD-35	35kV	600-300/5/5	0.5/5P10	30	30	36	90
LCWD-35	35kV	800-400/5/5	0.5/5P10	30	30	40	100
LCWD-35	35kV	1200-600/5/5	0.5/5P10	30	30	48	120

4. Outline and installation dimensions:




 

Primary rated current  A	M
15~400	M22×1.5
600	M27×1.5
800~1000	M30×1.5
1200~1500	Busbar

Table 3
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