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33KV Medium Voltage Instrument Current Transformer Epoxy Resin Casting CE Marked

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Address: Oriental HuaRui A, No. 150 Guanzhuang Road, Chaoyang District, Beijing, 100024, China

Contact name:Andy

Beijing GFUVE Instrument Transformer Manufacturer Co.,Ltd.

33KV Medium Voltage Instrument Current Transformer Epoxy Resin Casting CE Marked

Country/Region	china
City & Province	beijing beijing

Product Details

Epoxy Resin Cast 33KV Medium Voltage Outdoor current instrument transformer

Features

New magnetic material is taken to be the core of the current instrument transformer, which has high magnetic permeability, low saturation magnetization and good stability. Therefore, the measuring accuracy is higher and the instrument security factor is lower. Since the high quality silicon processed by advanced technology is taken to be the core of the protection windings, which assured the accuracy limit factor is higher.
The semicircular ring core and secondary windings are vacuum poured by high quality epoxide resin in the fire retardant plastic casing, which has the characteristic of moisture proof, stable performance and dispensing with maintenance.Small size, light weight, small footprint, fixed in the ring network switchgear cable.The cable can cross the current transformer through its internal poles quickly and uniformly.
The Cast Resin Straight-Through Current Transformer can be divided several kinds according to the various current ratio, accuracy and rated loads. The specific parameters are showed in the corresponding to each model parameter tables.

High precision 0.2s

Designed for 30years lifes

Good Stability in 33kv power line

Big burden.

Multi ratio CT

Theory

Instrument transformers are high accuracy class electrical devices used to isolate or transform voltage or current levels. The most common usage of instrument transformers is to operate instruments or metering from high voltage or high current circuits, safely isolating secondary control circuitry from the high voltages or currents. The primary winding of the transformer is connected to the high voltage or high current circuit, and the meter or relay is connected to the secondary circuit.
Instrument transformers may also be used as an isolation transformer so that secondary quantities may be used in phase shifting without affecting other primary connected devices.
Current transformers (CT) are a series connected type of instrument transformer. They are designed to present negligible load to the supply being measured and have an accurate current ratio and phase relationship to enable accurate secondary connected metering.
Current transformers are often constructed by passing a single primary turn (either an insulated cable or an uninsulated bus bar) through a well-insulated toroidal core wrapped with many turns of wire. This affords easy implementation on high voltage bushings of grid transformers and other devices by installing the secondary turn core inside high-voltage bushing insulators and using the pass-through conductor as a single turn primary.

Applications

The LZZW3-35Q outdoor current instrument transformers are fully enclosed and cast in epoxy resin. Instrument transformer is equipped with one core and coil assembly rated for measurement and protection, and then output multi ratio. The current transformers are designed for electric power systems of 50Hz/60Hz rated frequency and 35kV rated voltage. They are used for outdoor mounting. The performances of the products meet standards IEC60044-1, IEC61869-2 and ANSI/IEEE C57.13. The products are applied to metering electric energy, voltage controlling and relay protection.

1. Measurement current & voltage for energy meter and power meter

2. Supply protection current signal for microcomputer protection relay set

PARAMETERS

TECHNICAL DATA 1: TWO WINDINGS

Rated primary current(A)	Accuracy class combination	Rated secondary output(VA)					Surface creepage distance (mm)	Weight(KG)
Rated primary current(A)	1S/2S	0.2(S)0.5S	0.5	5P10	5P15	5P20	Surface creepage distance (mm)	Weight(KG)
10-630	0.2(S)/0.5(S) 0.2(S)/5p 0.5(S)/5p	10	20	100	60	40	1300	90
750-2000	0.2(S)/0.5(S) 0.2(S)/5p 0.5(S)/5p	10	20	120	75	50	1300	90

TECHNICAL DATA 2: THREE WINDINGS

Rated primary current(A)	Accuracy class combination	Rated secondary output(VA)					Surface creepage distance (mm)	Weight(KG)
Rated primary current(A)	1s/2s/3s	0.2(s)0.5S	0.5	5P10	5P15	5P20	Surface creepage distance (mm)	Weight(KG)
10-500	0.2(S)/0.2(S)/5P 0.2(S)/0.5(S)/5p 0.5(S)/0.5(S)5p	10	20	50	30	25	1300	90
600-1000				80	50	30
1200-2000				100	60	40
100-630	0.2(S)/5p/5p 0.5(S)/5p/5p	10	20	30	20	15
750-1000				50	30	20
1200-1600				60	30	25
2000				60	40	25

TECHNICAL DATA 3: FOUR WINDINGS SINGLS TRANSFORMAITON RADIO

Rated primary current(A)	Accuracy class combination	Rated secondary output(VA)					Surface creepage distance (mm)	Weight(KG)
Rated primary current(A)	1s/2s/3s/4s	0.2(s)0.5s	0.5	5P10	5P15	5P20	Surface creepage distance (mm)	Weight(KG)
10-800	0.2(S)/0.2(S)/5P/5P 0.2(S)/0.5(S)/5p/5P 0.5(S)/0.5(S)5p/5P	10	20	25	15	10	1300	90
1000				30	50	10
1200-2000				40	25	15

TECHNICAL DATA 4: THREE WINDINGS SINGLS TRANSFORMAITON RADIO

Rated primary current (A)	Accuracy class combination	Rated secondary output(VA)					Surface creepage distance (mm)	Wt (KG)
Rated primary current (A)	1s/2s/3s/4s	0.2(S)0.5s	0.5	5P10	5P15	5P20	Surface creepage distance (mm)	Wt (KG)
10-15-20	10	25	10	90
15-20-30
20-30-40
30-40-50
40-50-75
50-75-100
75-100-150
100-150-200
150-200-300
200-300-400
300-400-500
400-500-600
500-600-800
600-800-1200
800-1200-1500
1200-1500-2000

TECHNICAL DATA 5: IDYN

Rated primary current (A)		Ith/ls (KA r.m.s.)	Idyn (KA peak)
Double transformaion ratio	Single transformaion ratio	Ith/ls (KA r.m.s.)	Idyn (KA peak)
10-15-20	10	2	5
15-20-30	15	3	7.5
20-30-40	20,25	4	10
30-40-50	30	6.3	15.7
40-50-75	40	9.4	23.6
50-75-100	50	12.6	31.5
75-100-150	75	15.7	39
100-150-200	100	22	55
150-200-300	150	31.5	78.7
200-300-400	200,250	47	118
300-400-500	300	63	157.5
400-500-600	400	63	157.5
500-600-800	500	80	200
600-800-1200	600-1200	80	200
800-1200-1500	1500-2000	140	200
1200-1500-2000	1500-2000	140	200