LZCK2500-10 50/5A SPLIT CORE 5P20 ZCT ZERO SEQUENCE PROTECTION CURRENT TRANSFORMER
INTRODUCE
The Model LZCK2500-10 zero sequence ct is a ring type resin casting split core current transformer. This model can be used both for measurement and microcomputer protection of electrical equipment in 11KV and 35KV AC power system of ring network switchgears such as ABB-Safe Ring/Safe Plus...and cable distribution boxes.
We used imported silicon material and using our mature advanced producing technology we make sure our transformer has very goog linear and more than 20 years using life in order to be qualified with all the jobs. The semicircular ring core and secondary windings are vacuum poured by insulated resin.
The grounding zero sequence current protection installed on transformers in high current grounding systems serves as a backup protection for the main protection of transformers and for adjacent component grounding short circuits.
Under normal circumstances, the zero sequence current protection does not operate. When a ground short circuit occurs, the zero sequence current occurs. When it exceeds the operating current of the protection, the current relay ka acts. After a delay of kt, the circuit breakers on both sides of the transformer are tripped. The operating current of the zero sequence current protection should be greater than the operating current of the backup section of the zero sequence current protection for the outgoing line on that side. The action time limit for protection is also one greater than the latter δ T.
All of our GFUVE zero sequence current transformers are strictly comply IEC60044-1, IEC61869-2, ANSI/IEEE C57.13, GB1208-2006, GB/T 20840.1-2010, GB/T20840.2-2014, GB/T 22071.1-2018, IEC/EN61010-2-032, IEC/EN61010-2-031.
FEATURES
Accuracy class 0.5s, 0.5%, 1; Protection class 5P20, 5P10, 10P15, 10P10, 10P5; IEC60044-1, IEC/EN 61869-2, NTC 2205, GB/T 20840.2-2014, ANSI/IEEE C57.13; Measurement range 0-2000A AC; Holding wire diameter: φ120mm, φ140mm, φ160mm; Size: φ120xφ185x100, φ140xφ210x100, φ160xφ250x80; Secondary windings are vacuum poured by insulated resin; As a measurement and protection current transformer; High magnetic conductivity silicon steel material; Using life more than 20 years; Easily installation, with mounting bracket; Support Dual Ratio; Polyurethane resin casting; The protection level CT can accept customized design; 50/5A, 100/5A, 200/5A, 300/5A, 400/5A, 500/5A, 600/5A, 800/5A, 1000/5A... 100/1A, 200/1A, 300/1A, 400/1A, 500/1A, 600/1A, 750/1A, 800/1A, 1000/1A...
APPLIATIONS
Three phase power transformer; Protective relay device; Medium voltage metering system; Low voltage metering system; MV switchgears; Ring network cabinet; Air switch cabinet; Distribution boxes; Power Quality meter; Measuring instrument; Energy meter; Power Meter; Meter tester; Current load monitoring; Distribution Power transformer monitor system;
OUTLINE DRAWING
WIRING DIAGRAMS
P1, P2 is primary polarity terminal, S1, S2 is secondary polarity terminal.
P2, S2 is homonymous terminals (subtractive polarity).
PARAMETERS
| Electrical parameters | |
|---|---|
| Standards | IEC60044-1; IEC61869-2; NTC 2205; ANSI/IEEE C57.13; GB1208-2006; GB/T 20840.1-2010; GB/T 20840.2-2014; GB/T 22071.1-2018 |
| Accuracy Class | 0.5, 1(IEC61869-2 standard) 5P20, 5P10, 10P10, 10P15, 10P5 |
| Rated primary current | 50-2000A |
| Rated load | ≤25VA |
| Rated frequency | 50Hz or 60Hz |
| Rated secondary current | 5A or 1A |
| Ratio | 50/5A, 100/5A, 150/5A, 200/5A, 300/5A, 400/5A, 500/5A...2000/5A |
| Rated short-time thermal current | 40kA, 1S |
| Rated continuous thermal current | 120%I1n |
| Secondary winding power-frequency voltage | 3kV, 1min |
| Instrument security factor | FS ≤10 |
| Insulation Class | E |
| Material | Polyurethane+Silicon steel sheets+Enameled wire+ABS |
| Mechanical parameters | |
| Dimensions (W×D×H) (mm) | φ120 x φ185 x 100, φ140 x φ210 x 100, φ160 x φ250 x 80 |
| Jaw cable diameter(mm) | 120, 140, 160 |
| Weight (kg) | 7, 8, 9 |
| Operating conditions | |
| Operating temperature | -40°C to +70°C |
| Daily average temp | <+40°C |
| Storage temperature | -40°C to +70°C |
| Environment | Indoors |
| Altitude | <3500 meters |
| Conditions | No existence of severely begrimed, erosive and radioactive gas in the air. Permission of long-term operation under rated current. |
TECHNICAL DATA
| Type | LZCK2500-10 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Purpose | Measuring current transformer | Protection current transformer | Double winding current transformer | |||||||
| Ratio | Accuracy class and rated load(VA) | Accuracy class and rated load(VA) | Composite accuracy class and rated load (VA) | |||||||
| I1/I2 | 0.5 | 1 | 3 | 10P15 | 10P10 | 10P5 | 0.5 | 1 | 10P10 | 10P5 |
| 100/1 | 2 | 2.5 | 5 | 2 | 2.5 | 5 | 2 | 2.5 | 1.5 | 2 |
| 200/1 | 2 | 2.5 | 5 | 3 | 5 | 7.5 | 2.5 | 2.5 | 2 | 2 |
| 300/1 | 2.5 | 3.75 | 5 | 3 | 5 | 7.5 | 3.75 | 3.75 | 2.5 | 2.5 |
| 400/1 | 2.5 | 5 | 10 | 3 | 5 | 10 | 5 | 5 | 2.5 | 2.5 |
| 500/1 | 2.5 | 5 | 10 | 3.75 | 6.25 | 10 | 5 | 5 | 2.5 | 2.5 |
| 600/1 | 5 | 7.5 | 10 | 5 | 7.5 | 10 | 5 | 5 | 5 | 5 |
| 750/1 | 5 | 7.5 | 10 | 5 | 5 | 5 | 5 | |||
| 800/1 | 5 | 10 | 15 | 5 | 5 | 5 | 5 | |||
| 1000/1 | 5 | 10 | 15 | 5 | 5 | 5 | 5 | |||
| 50/5 | 2.5 | 2 | ||||||||
| 75/5 | 2.5 | 2.5 | ||||||||
| 100/5 | 2.5 | 2.5 | 2.5 | 2.5 | ||||||
| 200/5 | 2.5 | 5 | 2.5 | 5 | 2.5 | |||||
| 300/5 | 5 | 5 | 5 | 2.5 | 5 | 7.5 | 5 | 5 | 2 | 2.5 |
| 400/5 | 5 | 5 | 5 | 2.5 | 5 | 7.5 | 5 | 7.5 | 2.5 | 5 |
| 500/5 | 5 | 7.5 | 10 | 5 | 7.5 | 10 | 5 | 7.5 | 2.5 | 5 |
| 600/5 | 5 | 7.5 | 10 | 5 | 7.5 | 10 | 5 | 10 | 2.5 | 5 |
| 750/5 | 7.5 | 10 | 15 | 5 | 10 | 10 | 7.5 | 10 | 2.5 | 5 |
| 800/5 | 7.5 | 10 | 15 | 5 | 10 | 10 | 7.5 | 15 | 2.5 | 5 |
| 1000/5 | 10 | 15 | 20 | 10 | 10 | 10 | 10 | 15 | 2.5 | 5 |
| 1200/5 | 10 | 15 | 20 | 10 | 10 | 10 | 10 | 15 | 2.5 | 5 |
| 1500/5 | 10 | 15 | 20 | 10 | 10 | 10 | 10 | 15 | 2.5 | 5 |
| 1600/5 | 20 | 25 | 30 | 10 | 10 | 10 | 10 | 15 | 2.5 | 5 |
| 2000/5 | 20 | 25 | 30 | 10 | 10 | 10 | 10 | 15 | 2.5 | 5 |
SELECTION GUIDE
| Model | Primary rated current | Rated load | Aperture (mm) | Description(mm) | Weight (kg) |
|---|---|---|---|---|---|
| LZCK310-10 | 300-1000A | ≤10VA | φ50 | φ50 x φ110 x 32 | 1 |
| LZCK322-10 | 30-1000A | ≤10VA | φ50 | φ50 x φ110 x 52 | 1.6 |
| LZCK350-10 | 30-1000A | ≤25VA | φ50 | φ50 x φ110 x 105 | 3.1 |
| LZCK720-10 | 30-1000A | ≤25VA | φ80 | φ80 x φ110 x 50 | 2.1 |
| LZCK2500-10 | 30-3000A | ≤30VA | φ120，140，160 | φ120 x φ185 x 100 | 7 |
| LZCG530-10 | 30-1000A | ≤20VA | φ45 | φ45 x φ120 x 65 | 2.1 |
| LZCG930-10 | 30-1500A | ≤25VA | φ60 | φ60 x φ155 x 60 | 3.6 |
| LZCT722-10 | 30-1500A | ≤10VA | φ82 | φ82 x φ130 x 55 | 2.3 |
| LZCG2500-10 | 30-3000A | ≤30VA | φ120，140，160 | φ120 x φ185 x 100 | 7 |
ORDERING INFORMATION
Be sure to the type, current ratio, accuracy class, rated load and use of the products when you plan to make a order. Special specifications could be customized. All kinds of different specifications and parameters current transformers can be made according to your needs.
