✅ Professional Low Voltage Switchgear Manufacturer in China
We are a professional manufacturer of low voltage switchgear (LV switchgear) for EPC projects, power plants, petrochemical, oil & gas, metallurgy, water treatment, commercial buildings, and industrial power distribution applications. Low voltage switchgear is an assembly of circuit breakers, fuses, contactors, relays, switches, and busbars housed within a metal enclosure, designed to control, protect, and isolate electrical equipment operating at voltages up to 1,000V AC[reference:0][reference:1]. Our product portfolio includes GGD fixed switchgear, GCK withdrawable switchgear, GCS withdrawable switchgear, MNS modular switchgear, GDT fixed partitioned switchgear, and Prisma fixed partitioned switchgear[reference:2]. All products comply with IEC 61439, GB/T 7251, and IEC 439-1 standards[reference:3][reference:4], offering reliable power distribution, motor control, and reactive power compensation solutions for diverse project requirements.
Low voltage switchgear is the core equipment for power distribution systems, responsible for receiving, distributing, and controlling electrical energy from transformers to end-use equipment. Key functions include electrical isolation, circuit protection, local and remote switching, and fault management[reference:5]. Our LV switchgear products feature:
| Feature | Description |
|---|---|
| High Breaking Capacity | Short-circuit withstand up to 80kA/1s and peak withstand up to 176kA[reference:6][reference:7] |
| Flexible Configuration | Fixed, withdrawable, and modular designs to suit various application requirements[reference:8] |
| High Reliability | Advanced structural design with excellent dynamic and thermal stability[reference:9] |
| Safe & Maintenance-Friendly | Drawer units can be replaced without power outage (withdrawable types); clear compartment separation[reference:10][reference:11] |
| Wide Range of Ratings | Rated currents from 400A up to 6300A; voltages from 380V to 690V[reference:12][reference:13] |
| Multiple Protection Levels | IP20, IP30, IP31, IP40, IP54 options for various installation environments[reference:14][reference:15] |
| International Standards Compliance | IEC 61439, GB/T 7251, IEC 439-1 certified[reference:16][reference:17] |
| Wide Application Range | Power plants, petrochemical, oil & gas, metallurgy, commercial buildings, data centers, water treatment[reference:18] |
| Parameter | Specification |
|---|---|
| Type | Fixed configuration, economical and general-purpose[reference:19] |
| Rated Voltage | 380V AC, 50Hz[reference:20] |
| Rated Current | Up to 3150A[reference:21] |
| Short-circuit Withstand | 15kA ~ 50kA (1s)[reference:22] |
| Peak Withstand Current | 30kA ~ 105kA[reference:23] |
| Application | Power plants, substations, factories, commercial buildings[reference:24] |
| Parameter | Specification |
|---|---|
| Type | Withdrawable (drawer-type), high reliability[reference:25] |
| Rated Voltage | 380V, 660V[reference:26] |
| Rated Insulation Voltage | 660V[reference:27] |
| Features | High breaking capacity, flexible electrical schemes, strong series and versatility[reference:28] |
| Parameter | Specification |
|---|---|
| Type | Withdrawable, single-side operation, 800mm depth[reference:29] |
| Rated Voltage | 380V (400V), 660V[reference:30] |
| Rated Insulation Voltage | 660V (1000V)[reference:31] |
| Horizontal Busbar Current | Up to 4000A[reference:32] |
| Vertical Busbar Current | 1000A (MCC)[reference:33] |
| Short-circuit Withstand | 50kA ~ 80kA (1s)[reference:34] |
| Peak Withstand Current | 105kA ~ 176kA[reference:35] |
| Installation Modulus | 20mm (up to 11 drawer layers)[reference:36] |
| Max. Drawers per Cabinet | 22 circuits[reference:37] |
| Application | Power plants, petrochemical, metallurgy, high-automation facilities[reference:38] |
| Parameter | Specification |
|---|---|
| Type | Modular, factory-assembled, standard modules[reference:39] |
| Rated Voltage | 380V, 660V[reference:40] |
| Rated Insulation Voltage | 660V[reference:41] |
| Main Busbar Current | Up to 5500A (IP00) / 4700A (IP30)[reference:42] |
| Vertical Busbar Current | 1000A (standard)[reference:43] |
| Short-circuit Withstand | 100kA (1s)[reference:44] |
| Peak Withstand Current | 250kA[reference:45] |
| Installation Modulus | 25mm (up to 9 drawer layers)[reference:46] |
| Double-sided Option | Available (drawers on both sides, 1000mm depth)[reference:47][reference:48] |
| Standards | IEC 439-1, GB/T 7251[reference:49] |
| Parameter | Specification |
|---|---|
| Type | Fixed partitioned, enclosed, multiple protection levels[reference:50] |
| Rated Voltage | 400V, 660V AC[reference:51] |
| Transformer Capacity | Up to 2500kVA[reference:52] |
| Rated Current | 400A ~ 4000A[reference:53] |
| Short-circuit Withstand | 15kA ~ 80kA[reference:54] |
| Protection Level | IP20 ~ IP54[reference:55] |
| Application | Power plants, petrochemical, metallurgy, textile, high-rise buildings[reference:56] |
| Parameter | Specification |
|---|---|
| Type | Fixed partitioned, rational design, reliable performance[reference:57] |
| Rated Insulation Voltage | 1000V[reference:58] |
| Rated Current | 630A ~ 3200A[reference:59] |
| Short-circuit Withstand | 85kA (1s)[reference:60] |
| Peak Withstand Current | 187kA[reference:61] |
| Protection Level | IP20, IP31, IP54[reference:62] |
| Standards | IEC 439-1[reference:63] |
| Application | Power plants, substations, industrial facilities, commercial buildings[reference:64] |
| Parameter | Specification Range |
|---|---|
| Standards | IEC 61439, GB/T 7251, IEC 439-1[reference:65][reference:66] |
| Rated Voltage | AC 380V, 400V, 660V[reference:67] |
| Rated Insulation Voltage | 660V ~ 1000V[reference:68][reference:69] |
| Auxiliary Circuit Voltage | AC 220V, 380V; DC 110V, 220V[reference:70] |
| Frequency | 50Hz ~ 60Hz[reference:71] |
| Rated Current (Main Busbar) | Up to 6300A[reference:72] |
| Short-circuit Withstand (1s) | 15kA ~ 100kA[reference:73][reference:74] |
| Peak Withstand Current | 30kA ~ 250kA[reference:75][reference:76] |
| Protection Level | IP20 ~ IP54[reference:77][reference:78] |
| Installation Type | Floor-mounted, against-wall / not against-wall[reference:79] |
| Operation | Front operation, front/rear maintenance[reference:80] |
| Altitude | ≤2000m[reference:81] |
| Ambient Temperature | -5°C ~ +40°C (24h avg ≤ +35°C)[reference:82] |
| Application | Power plants, petrochemical, oil & gas, metallurgy, water treatment, commercial buildings, data centers[reference:83][reference:84] |
* Custom specifications are available upon request for EPC project tenders.
| Application Condition | Recommended Series | Reason |
|---|---|---|
| General power distribution / Cost-sensitive projects | GGD Series | Economical, fixed configuration, up to 3150A[reference:85] |
| Motor Control Centers (MCC) / Flexible industrial applications | GCK / GCS Series | Withdrawable modules, flexible, high reliability[reference:86] |
| High-capacity power plants / Large industrial facilities | GCS / MNS Series | High current capacity (up to 4000A/6300A), high short-circuit withstand[reference:87][reference:88] |
| High-density / Space-constrained installations | MNS Series | Modular design, double-sided operation option, up to 72 drawers[reference:89] |
| Harsh / Corrosive environments | GDT Series | Multiple protection levels (IP20~IP54), enclosed design[reference:90] |
| High-reliability / Critical infrastructure | Prisma Series | High short-circuit withstand (85kA/1s), IEC 439-1 certified[reference:91][reference:92] |
Q1: What is low voltage switchgear?
A: Low voltage switchgear (LV switchgear) is an assembly of electrical components including circuit breakers, fuses, contactors, relays, disconnect switches, and busbars housed within a metal enclosure, designed to control, protect, and isolate electrical equipment operating at voltages up to 1,000V AC or 1,500V DC[reference:93][reference:94]. It is the core equipment for power distribution systems in buildings, industrial facilities, and power stations[reference:95].
Q2: What are the main types of low voltage switchgear?
A: The main types include: Fixed switchgear (GGD) — economical, general-purpose; Withdrawable switchgear (GCK, GCS) — drawer-type modules for flexible maintenance; and Modular switchgear (MNS) — standard modules, high density, double-sided options[reference:96][reference:97].
Q3: What is the difference between GGD, GCK, GCS, and MNS switchgear?
A: GGD is fixed-type, economical, for general power distribution. GCK and GCS are withdrawable (drawer-type) with different drawer mechanisms — GCS uses a rotary push mechanism, GCK uses other configurations[reference:98]. GCS is single-side operation (800mm depth), while MNS can be double-sided (1000mm depth)[reference:99][reference:100]. MNS has a 25mm installation modulus (vs. 20mm for GCS) and can accommodate more drawer units[reference:101].
Q4: What standards do your low voltage switchgear products comply with?
A: Our LV switchgear products are manufactured in compliance with IEC 61439 (international standard for low-voltage switchgear and controlgear assemblies), GB/T 7251 (Chinese national standard), and IEC 439-1[reference:102][reference:103].
Q5: What is the rated voltage range for low voltage switchgear?
A: Standard rated voltages include AC 380V, 400V, and 660V[reference:104]. Rated insulation voltage ranges from 660V to 1000V depending on the series[reference:105][reference:106].
Q6: What is the maximum current rating for low voltage switchgear?
A: Main busbar current ratings vary by series: GGD — up to 3150A[reference:107]; GCS — up to 4000A[reference:108]; MNS — up to 5500A (IP00) / 4700A (IP30)[reference:109].
Q7: What is the short-circuit withstand capability?
A: Short-circuit withstand (1s) varies by series: GGD — 15kA ~ 50kA[reference:110]; GCS — 50kA ~ 80kA[reference:111]; MNS — up to 100kA[reference:112]; Prisma — up to 85kA[reference:113]. Peak withstand currents range from 30kA to 250kA[reference:114][reference:115].
Q8: What protection levels (IP ratings) are available?
A: We offer multiple protection levels: IP20 — protection against solid objects >12.5mm; IP30 — protection against tools and wires >2.5mm; IP31 — IP30 + dripping water protection; IP40 — protection against small objects >1mm; IP54 — dust-protected and splash-proof[reference:116][reference:117][reference:118].
Q9: What are the typical applications of low voltage switchgear?
A: LV switchgear is widely used in: Power plants — auxiliary power distribution; Petrochemical — motor control and power distribution; Oil & gas — onshore and offshore installations; Metallurgy — heavy industrial power distribution; Commercial buildings — lighting and power distribution; Data centers — reliable power distribution; Water treatment — pump control and power distribution[reference:119][reference:120].
Q10: Can drawers be replaced without power outage?
A: Yes. For withdrawable switchgear (GCK, GCS, MNS), drawer units can be removed and replaced without interrupting power to the main busbar, minimizing downtime for maintenance and repairs[reference:121].
Q11: What is the installation modulus and why does it matter?
A: The installation modulus determines the spacing between mounting holes and affects the number of drawer units per cabinet. GCS uses 20mm modulus (up to 11 layers, 22 circuits)[reference:122]; MNS uses 25mm modulus (up to 9 layers, but can be double-sided)[reference:123]. MNS offers more flexibility for small-current applications with 1/4-unit drawers[reference:124].
Q12: What is the difference between fixed and withdrawable switchgear?
A: Fixed switchgear (GGD) has permanently installed components — more economical but requires power outage for maintenance. Withdrawable switchgear (GCK, GCS, MNS) has removable drawer units — allows hot-swappable replacement, higher flexibility, and better fault isolation[reference:125].
Q13: What components are typically inside low voltage switchgear?
A: Typical components include: Circuit breakers — for protection and switching; Contactors — for motor control; Disconnect switches — for isolation; Protective relays — for fault detection; Busbars — for power distribution; and Enclosures — for protection and safety[reference:126].
Q14: What are the environmental requirements for LV switchgear installation?
A: Installation requirements include: Ambient temperature — -5°C to +40°C (24h average ≤ +35°C); Altitude — ≤2000m; Relative humidity — ≤50% at 40°C; Installation inclination — ≤5° from vertical; Environment — no severe vibration or corrosive atmosphere[reference:127].
Q15: What is the Prisma series switchgear?
A: The Prisma series is a fixed partitioned low voltage switchgear with rational design and reliable performance[reference:128]. It features rated insulation voltage of 1000V, currents from 630A to 3200A, short-circuit withstand of 85kA/1s, and peak withstand of 187kA[reference:129]. It complies with IEC 439-1 and is suitable for power plants, substations, and industrial facilities[reference:130].
Q16: What is the GDT series switchgear?
A: The GDT series is a fixed partitioned enclosed LV switchgear with multiple protection levels (IP20~IP54) and complete anti-electric shock measures[reference:131]. It is suitable for power distribution systems up to 2500kVA and is used in power plants, petrochemical, metallurgy, textile, and high-rise buildings[reference:132].
Q17: How do I select the right low voltage switchgear for my project?
A: Key selection factors include: (1) Rated voltage and current — match your system requirements; (2) Short-circuit withstand — based on available fault current; (3) Protection level (IP) — based on installation environment; (4) Type — fixed, withdrawable, or modular based on maintenance needs; (5) Number of circuits — determine cabinet quantity; (6) Standards compliance — IEC 61439, GB/T 7251; (7) Environmental conditions — temperature, altitude, humidity[reference:133].
Q18: What tests are performed on low voltage switchgear before delivery?
A: We conduct comprehensive quality tests including: (1) Dielectric test — verifying insulation strength; (2) Short-circuit withstand test — verifying dynamic and thermal stability; (3) Temperature rise test — verifying thermal performance; (4) Mechanical operation test — verifying switch mechanisms; (5) Protection level test — verifying IP rating; and (6) Functional tests — verifying all protection and control functions.
Q19: Do you support EPC projects with technical documentation?
A: Yes. We provide full technical support for EPC projects, including datasheets, type test reports, factory acceptance tests (FAT), material traceability documentation, shop drawings, one-line diagrams, and custom design based on project power distribution requirements and specifications. We are a trusted partner for global EPC contractors in power, petrochemical, oil & gas, and infrastructure sectors.
Q20: Can you provide custom low voltage switchgear configurations?
A: Yes. We offer fully customized LV switchgear solutions including custom current ratings, voltage ratings, number of circuits, protection levels, enclosure sizes, component brands (ABB, Schneider, Siemens, etc.), and special markings. Our engineering team works closely with EPC contractors to develop switchgear that meets specific project technical requirements, load conditions, and installation constraints.
Send your project specification, power distribution requirements, or one-line diagram. Our engineering team will reply with a customized solution, BOM & datasheet within 24 hours.
WhatsApp / Zalo: +86 17856068126 | Email: [email protected]
Founded in 1974, Anhui Tiankang Group is a cross-industry and diversified conglomerate. Its core products cover instruments and meters, optical and e...
Copyright © 2026 ANHUI TIANKANG（GROUP） SHARES CO.,LTD XML
