Ljk Single-Phase Epoxy-Resin Type Zero-Sequence Current Transformer for Indoors

• Application: Metering
• Type: Current Transformer
• Phase: Single
• Operation Condition: Indoor
• Usage: Protection, Measurement
• Winding Form: Single Layer & Tightly Wound Type
• Model NO.: LJK
• Insulating Medium: Epoxy Resin
• Installation: Busbar Type
• Magnetic Circuit Structure: Single Stage Type
• Voltage Transformation Principle: Electromagnetic Type
• Transport Package: Export Box
• Trademark: DGG
• Origin: China
• HS Code: 8504311000
• Production Capacity: 100000PCS/Year

Product Description

GENERAL

This series of transformers are used in indoor small ground current systems of rated frequency 50Hz or 60Hz and rated voltage up to and including 35kV for three-phase cable grounding protection, it's also used with a relay.

The transformer can be divided into two parts during installation, and then they can be combined again and buckled tightly with a clamp. It can be installed without power.


MODEL AND MEANING

NORMAL ENVIRONMENTAL CONDITIONS

1. Altitude: Should not exceed 1000m
2. Ambient temperature: -5ºC ~ +40ºC
3. Air relative humidity: ≤85%
4. Air relative site: Indoor.

TECHNICAL PARAMETERS

1. Rated secondary current: 5A or 1A
2. Power factor: cosφ=0.8(lag)
3. Rated frequency: 50Hz or 60Hz
4. Rated primary current, rated output, and accurate level see table 1
5. Insulating property: primary winding to secondary winding and ground, and secondary winding to the ground can bear the power frequency withstand voltage 3kV for 1min.

Table 1: Current Part of the Technical Parameters
 

Type	Rated primary current(A)	Accuracy Class	Rated Output (VA)	Rated Current Ratio (A)	Accuracy Class	Rated Output (VA)
LJK-Φ80 LJK-Φ100	50-60	10P5	2.5
	75	10P5	3.75	75/5	10P5	2.5
	100	10P10(10P5)	2.5(5)	100/5	10P10(10P5)	1.5(3.75)
	150	10P10(10P5)	3.75(7.5)	150/5	10P10(10P5)	2.5(7.5)
	200-300	10P10(10P5)	5(10)	250-300/5	10P10(10P5)	5(10)
	400-600	10P5	5(10)	400-600/5	10P10(10P5)	5(10)
LJK-Φ120 LJK-Φ160 LJK-Φ200	50-60	10P10(10P5)	3.75
	75	10P10(10P5)	3.75(7.5)	75/5	10P5	2.5
	100	10P10(10P5)	7.5(15)	100/5	10P10(10P5)	3.75(7.5)
	150	10P10(10P5)	10(20)	150/5	10P10(10P5)	5(10)
	200-300	10P10(10P5)	10(20)	250-300/5	10P10(10P5)	7.5(15)
	400-600	10P10(10P5)	10(20)	400-600/5	10P10(10P5)	7.5(15)

 

OUTLINE AND INSTALLATION DIMENSIONS

 

Type 2: 

Model	A	B	H	a	b	M	D	X
LJK-Φ80	196	166	49	145	124	173	80	B
LJK-Φ100	214	190	60	157	136	196	100	B
LJK-Φ120	235	210	80	174	155	210	120	B
LJK-Φ160	275	250	72	203	180	255	160	10
LJK-Φ200	366	344	82	279	238	355	200	12