Home / Products / Current transformer / Zero Sequence Current Transformer

400V Self-healing Capacitor-cylindrical BKMJ0.46-30-3

1.Rated Voltage(Ue)：250v~525v, up to 2000v
2.Frequency：50/60Hz
3.Compact design，equipped with grounding bolt
4.Potting material: PU resin (soft resin)
5.Easy installation and wiring
6.Small size, Light weight
7.Self-healing, Maintenance-free
View details
50KVAR Self-healing Capacitor for PFC(Power factor correction)-square BKMJ

1.Rated Voltage(Ue)：100v~1000v
2.Installation Indoor
3.Case material Galvanized steel sheet
4.Output Range 10~100kvar
5.Frequency 50/60Hz
6.Connection configuration D, Y, YN, III
7.Terminal Block ：M6, M8, M10 (According to capacitor power)
8.Lose tanδ<0.001 (20°C 50Hz)
9.Temprature -25°C~50°C
10.Highest Altitude 2000m
11.Capacitor (to wall) pitch ≥50mm
12.Capacitance Deviation -5%~+10%
View details
BKMJ0.4KV Submerged Arc Furnace Capacitor

1.Frequency 60Hz
2.Capacitance Deviation -5%~+10%
3.Max Current 2.5×In
Equipped with discharge resistors
4.Integrated with independent over-voltage protection devices
5.Superior self-healing performance and extended service life
6.Low-loss factor, dry-type design with leakage-free construction
7.Equipped with discharge resistors
View details
10KV High voltage Shunt High-Voltage Capacitors

1.Rated Voltage:6kV,10kV,35kV
2.Rated Capacity:1-100Mvar(per bank)
3.The capacitor is mainly consisted of container and device body.
4.The core is consisted of severalelements and insulation parts. The element is rolled, pressed andmade of two aluminum foilsand somepiece of thin dielectric polypropylene films sandwiched betweenthe two aluminum foils. In order to reach the differentdemand of voltage and capacity, the elements in core is connected by someseriesand parallelmethod. The technology of aluminum foiledge folding and protruding weldingare used to reduce the loss and increase the performance of partial discharging.
View details

Zero Sequence Current Transformer

1.Input voltage:11kV,Output voltage:400V
2.Frequency:50/60Hz
3.Rated primary current:20~1000A
4.Rated secondary current:5 or 1A
5.Standard:GB 20840.2-2014/IEC 61869-1 & 61869-2
6.The transformer is epoxy resin cast fully-enclosed electromagnetic.It features high accuracy, large capacity, and stable performance.

Send Inquiry

Download

Fast Delievery
Quality Assurance
24/7 Customer Service

Product Introduction

1.Zero Sequence Current Transformer: Reliable Ground Fault Protection for Modern Grids

When detecting ground faults in resistance-grounded power systems, the Zero Sequence Current Transformer (ZSCT) is your frontline defense against costly outages. Designed for 11kV/400V networks, our epoxy-cast ZSCT combines open-core flexibility with ±1% accuracy to monitor leakage currents as low as 20mA – even in extreme temperatures (-40°C to +85°C). Unlike conventional models, its modular design allows live installation, eliminating grid downtime during upgrades.

Zero Sequence Current Transformer

2.Technical Specifications

Input/Output Voltage: 11kV / 400V
Frequency: 50/60Hz
Primary Current: 20~1000A
Secondary Current: 5A or 1A
Compliance: GB 20840.2-2014, IEC 61869-1/2, UL 508, CE
Structure: Epoxy resin-cast, open-type or split-core options

Type	Hole Diameter	L	H	D	Anchor Bolt Center Distance	B	C	Anchor Bolt Threaded Hole
LXK-80	80	195	170	46	173	144	125	M8
LXK-100	100	216	190	54	192	157	140	M8
LXK-120	120	235	210	59	212	174	156	M8
LXK-140	140	300	270	82	269	217	181	M12
LXK-160	160	300	270	82	269	217	181	M12
LXK-180	180	300	270	82	269	217	181	M12
LXK-200	200	386	345	83	355	278	238	M12

3.Key Features & Advantages

1. Precision Ground Fault Detection

Our ZSCT identifies imbalances as low as 3% of rated current, critical for early fault isolation in solar farms and data centers.

2. Zero-Downtime Installation

The open-core design enables retrofitting onto live cables – ideal for aging grids requiring phased upgrades.

3. Harsh Environment Resilience

IP67-rated epoxy housing resists dust, moisture, and corrosive atmospheres common in offshore wind farms or desert substations.

4. Dual Compatibility

Works seamlessly with analog relays (5A output) and digital systems (1A + Modbus RTU options).

4.Real-World Applications

Be used in a wide range of industries.

Industrial Plants

Eliminate power factor penalties in CNC machines and assembly lines while handling surge currents up to 100x rated capacity.

Substation

Stabilizes substation voltage against harmonics and intermittent generation from renewable inverters.

Commercial Buildings

Retrofit aging systems in hospitals or malls with silent (<45dB), flame-retardant capacitors that meet NFPA 70 fire codes.

5.How It Works?

The Zero Sequence Current Transformer (ZSCT) encircles all three phase conductors, measuring the vector sum of currents. During a ground fault (e.g., a damaged cable), this sum becomes non-zero. Our transformer converts this imbalance into a proportional 5A/1A signal, triggering circuit breakers within milliseconds.

6.Manufacturing Excellence

Material Control: 100% traceable copper windings with partial discharge <5pC
Process Validation: 24-hour thermal cycling tests (-55°C ↔ +125°C)
Certifications: ISO 9001, ISO 14001, IEC 61869-6

7.Why Choose Our ZSCT?

15-Year MTBF: Validated through accelerated life testing
Customization: Core diameters from ф120mm to ф300mm
Global Support: 48-hour technical response in 12 languages
Sustainability: 98% recyclable materials and RoHS-compliant resins

Certificate

8.FAQs

1. Can I install your ZSCT without shutting down my substation?

Yes. Our open-core LKB-ф120 model installs around live cables via its hinged design.

2. How does epoxy resin improve performance?

It provides superior moisture resistance compared to traditional PVC, reducing insulation degradation by 70% over 10 years.

3. Do you offer models for small-resistance grounded systems?

Absolutely. We provide ZSCTs with 10mA~5A adjustable thresholds for precise fault detection.

4. What certifications do your products hold?

All units meet IEC 61869-6 for accuracy and IEEE C57.13 for thermal stability.

9.Contact Us

Need a Custom Solution?

Email our engineers at xaxd_electric@163.com with your core size, current rating, and environmental needs. Responses within 4 business hours.

By choosing our Zero Sequence Current Transformer, you’re not just buying a component – you’re securing 24/7 grid reliability backed by 15 years of R&D in fault protection.

10.Factory Show

11.Equipment Display

Equipment

12.Application Cases

State Grid systems, power engineering, steel and metallurgy, petrochemicals, rail transportation, energy and water conservancy, construction, environmental protection, and renewable energy sectors