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GCK Withdrawable Motor Control Centre - 400V / 415V
GCK withdrawable motor control centre 400V/415V, up to 3150A busbar, 50kA. Drawer modules 63A-800A, Form 4b. CKD kits and training for local assembly.
- Overview
- Applications
- Technical Data
- Services
- Quality Control
- Recommended Products
GCK Withdrawable Motor Control Centre - 400V / 415V
GCK concentrates every motor starter in a plant into one coordinated lineup of withdrawable drawers. Each motor feeder sits in its own drawer with isolating contacts on both power and control circuits, so a failed starter is pulled out and replaced in minutes while every other motor keeps running. Rated to 3150A busbar with 50kA withstand, verified to IEC 61439.
THE ARGUMENT IS DOWNTIME, NOT ELECTRICITY
Electrically a GCK drawer and a GGD fixed feeder do the same job. The difference shows up the day a starter fails. On a fixed board that means isolating a section - often the whole board. On a GCK it means swapping a drawer.
In continuous-process plant - cement, desalination, petrochemical, mining, water treatment - one avoided shutdown usually covers the price difference outright. That is why process industries specify MCCs and commercial buildings generally do not.
WHY THIS IS THE RIGHT PRODUCT TO ADD TO YOUR LINE
For a panel builder, GCK is the natural step up from GGD. The cabinet structure and busbar system are familiar work; what is new is the drawer, and that is exactly the part we supply as a finished, factory-tested functional unit. You are not being asked to develop a drawer mechanism - you are bolting in a proven one.
An Indonesian client with no drawout experience was shipping their own branded drawer cabinets within four months this way, with gross margin up 35%.
FORM 4b IS WHAT MAKES IT SAFE
Withdrawable construction is only defensible if the compartments are genuinely segregated. In Form 4b each drawer, its busbar connection and its outgoing terminals are individually separated, so a fault or an operator error in one compartment cannot propagate down the lineup. Without it, working on one drawer while adjacent motors run is not a safe practice.
MIXED FEEDER TYPES IN ONE LINEUP
Drawer modules from 63A to 800A accommodate direct-on-line and star-delta starters, soft starters, variable frequency drives and plain feeders in the same board - which is what a real plant needs, since small pumps, large fans and process drives all require different starting methods but one coordinated protection scheme.
Configured to the destination voltage, with 400V 60Hz verification for Saudi Arabia and 525V available for South African mining.
PRIMARY APPLICATIONS
- Pump and fan motor control in water treatment, wastewater and desalination plants - a major segment across Saudi Arabia, UAE, Kuwait and Qatar.
- Cement plant motor control: crushers, mills, kiln drives, conveyors, fans.
- Mining and mineral processing, including South African operations at 525V.
- Oil, gas and petrochemical process facility motor control.
- Steel and metallurgical plant drives.
- HVAC and chiller plant motor control in large buildings, airports and hospitals.
- Food processing, packaging and pharmaceutical production lines.
- Port, terminal and materials handling installations.
- Irrigation and agricultural pumping schemes across Africa and Central Asia.
WHEN TO SPECIFY GCK OVER GGD
Choose GCK where the plant runs continuous or semi-continuous process loads, where one motor feeder failing must not stop the rest of the plant, where the site is remote and holding spare drawers is the practical maintenance strategy, or where the client specification mandates withdrawable construction.
Where the motor count is small and the loads are non-critical, motor feeders can sit in a GGD board more economically.
WHO BUYS THIS FROM US
Panel builders moving up from fixed-cabinet production into the drawout market; EPC contractors on process plant projects; and industrial end users replacing an aged MCC lineup. Most take the component and drawing package and assemble locally, because MCC lineups are bulky and freight on a full container of finished cabinets is a large share of delivered cost.
REGIONAL FIT
- Middle East: desalination, oil and gas, and industrial projects. Saudi Arabia requires 400V 60Hz verification for both the assembly and the motor protection settings. SASO SABER, SEC, DEWA, KAHRAMAA and Oman DCRP approvals supported.
- Africa: mining, cement and water infrastructure. Remote sites make fast drawer replacement the only realistic repair strategy. 525V available for South African mining.
- Russia and CIS: 380V industrial motor control with genuine EAC certification.
- Eastern Europe: 400V, CE marked to EN 61439.
NOT SUITABLE FOR
General distribution with little motor load - specify GGD or GCS. Projects demanding internationally interchangeable module dimensions - specify MNS.
TECHNICAL DATA - GCK Withdrawable Motor Control Centre
Compliance: IEC 61439-1, IEC 61439-2, GB 7251.1
Electrical Ratings
| Parameter | Specification |
| Rated operational voltage (Ue) | 400 V / 415 V AC (380 V and 525 V available) |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated frequency | 50 Hz / 60 Hz |
| Rated current, main busbar | 1000 / 1600 / 2500 / 3150 A |
| Rated current, vertical distribution busbar | 1000 A |
| Rated short‑time withstand current (Icw) | 50 kA for 1 s |
| Rated peak withstand current (Ipk) | 105 kA |
| Pollution degree | 3 |
| Overvoltage category | IV at the incomer |
Drawer System
| Item | Details |
| Drawer positions | Connect / Test / Disconnect |
| Drawer sizes | 1/2, 1, 1.5 and 2 unit |
| Drawer current rating | 63 A to 800 A |
| Isolating contacts | silver‑plated, on both power and control circuits |
| Control circuit | remains connected in Test position for control logic verification |
| Interlock | mandatory mechanical three‑position interlock, prevents withdrawal under load |
| Mechanical endurance | 100 000 cycles |
Feeder Types
| Item | Details |
| Feeder unit types | Direct‑on‑line starter, star‑delta starter, soft starter, variable frequency drive, reversing starter, two‑speed starter, feeder‑only unit |
| Motor protection | thermal overload relay or electronic motor protection relay with earth fault |
Construction
| Item | Specification |
| Frame | high‑strength steel sections, modular |
| Internal separation | Form 3b / Form 4b per IEC 61439‑2 |
| Protection degree | IP30 standard; IP40, IP54 optional |
| Enclosure | cold‑rolled steel, powder coated RAL 7035 |
| Busbar | electrolytic copper, top‑mounted, flame‑retardant supports |
| Cable entry | bottom or top entry |
| Earthing | continuous PE bar; drawer earth contact engages before power contacts |
Dimensions & Weight
| Item | Value |
| Width | 600 / 800 / 1000 / 1200 mm |
| Depth | 600 / 800 / 1000 mm |
| Height | 2200 mm |
| Approximate weight | 400‑900 kg per section |
Service Conditions
| Parameter | Specification |
| Ambient temperature | -5 °C to +40 °C per IEC; verified to +55 °C with derating |
| Relative humidity | 50% at +40 °C, up to 90% at +20 °C |
| Altitude | up to 2000 m |
| Installation | indoor |
OPTIONS
Form 4b internal separation | IP54 enclosure | spare drawers for on-site standby | intelligent motor protection with Modbus or Profibus | VFD and soft starter modules | anti-condensation heater | forced ventilation for high ambient | 60 Hz verification for Saudi Arabia | 525 V rating for mining | tropicalised coating | CKD kit for local assembly
WE SELL THE CAPABILITY, NOT JUST THE BOX
Most suppliers quote you a finished cabinet. We would rather make you the factory. Over 15 years we have equipped more than 300 partner enterprises in 72 countries to build their own low voltage switchgear locally, using our drawings, our components and our training. If you only want finished cabinets we will supply those too - but read what the alternative saves first.
1. TECHNICAL PACKAGE - GA DRAWINGS AND ENGINEERING
Complete general arrangement drawings, busbar layouts, single-line and schematic diagrams, drilling and cut-out templates, torque tables, BOM with part numbers, and assembly instructions. Drawings are issued in DWG and PDF, dimensioned in millimetres, and revised free of charge for your project variations. Your engineer works from a design that has already been verified, instead of reverse-engineering a competitor's board.
2. COMPONENT SUPPLY - CKD KIT FROM 2,000+ SELF-DEVELOPED PARTS
We manufacture over 2,000 of our own switchgear components and 38+ patents sit behind them. That matters because the parts that decide whether a cabinet passes inspection - busbar supports, insulators, drawer isolating contacts, racking mechanisms, interlocks - are not reliably available on the open market at consistent quality. You buy the kit flat-packed, add local sheet metal and labour, and the freight bill collapses. A South African distributor cut total cost by 40% doing exactly this; logistics alone had been eating 25% of their landed cost.
3. LEAD TIME
Building locally from a kit removes the ocean freight leg from your delivery promise. The same South African partner went from a 3-month lead time to 5 weeks. In markets where the contractor pays liquidated damages for late energisation, that is often worth more than the price difference.
4. TRAINING AND ASSEMBLY SUPPORT
On-site or online training for your assembly team: frame build, busbar bracing and torquing, drawer alignment, Form separation, wiring discipline, routine testing. We also run remote support during your first production batches. An Indonesian client used this route to enter the high-end panel market within 4 months and lifted margin by 35%.
5. OEM AND ODM - YOUR BRAND ON THE DOOR
Nameplate, colour, layout, packaging and documentation to your brand. Non-disclosure agreements and territory protection for distributors who are developing a market. You sell as a manufacturer, not as a re-seller.
6. CERTIFICATION AND SUBMITTAL SUPPORT
Design verification evidence to IEC 61439-1 and IEC 61439-2, type-test reports, material certificates and QC records for your tender submittals. Country routes supported: EAC under TR CU 004/2011 and TR CU 020/2011 for the EAEU, CE under LVD 2014/35/EU and EMC 2014/30/EU to EN 61439 for the EU, SASO SABER PCoC plus per-shipment SCoC for Saudi Arabia, SONCAP for Nigeria under HS 8536, KEBS PVoC Routes A/B/C for Kenya, and utility submittals for DEWA, KAHRAMAA, MEW, Oman DCRP and ICIGI.
7. AFTER-SALES AND SPARES
Technical response within 24 hours. Spare parts kept to the same drawing revision for the life of the design, so a drawer bought in year one still fits a cabinet built in year five. Warranty 12 months from commissioning or 18 months from shipment.
8. COMMERCIAL TERMS
FOB, CFR, CIF, DDP and Ex-Works. Consolidated container loading with mixed products. Trade Assurance, T/T and L/C at sight. Sample and pilot batch orders accepted before you commit to volume.
QUALITY CONTROL - VERIFIED ASSEMBLY, NOT A FOLDER OF COMPONENT CERTIFICATES
The most common reason a low voltage board is rejected on site is not a faulty breaker. It is that the assembly itself was never verified. IEC 61439 verifies the complete assembly - enclosure, busbar system, internal separation, temperature rise, short-circuit withstand and IP rating, together. A cabinet fitted with certified devices is not automatically a verified assembly, and inspectors in our markets increasingly know the difference.
DESIGN VERIFICATION - IEC 61439-1 AND -2
Strength of materials and parts, degree of protection, clearance and creepage distances, protection against electric shock and integrity of the protective circuit, incorporation of switching devices and components, internal electrical circuits and connections, terminals for external conductors, dielectric properties, temperature-rise limits, short-circuit withstand strength, and electromagnetic compatibility. Verification evidence is issued for the assembly as built and supplied for your tender submittal.
ROUTINE VERIFICATION - EVERY CABINET, BEFORE IT SHIPS
1. Enclosure inspection - dimensions, squareness, door alignment and gap, panel flatness, weld and bolt integrity.
2. Coating - pre-treatment, powder coat thickness measured, adhesion cross-hatch test, RAL colour verification, salt spray on batch samples.
3. Busbar system - phase sequence and colour identification, bar section and spacing against drawing, insulator and holder installation, every joint torqued to specification and marked.
4. Protective circuit continuity - PE bar and door bonding tested at the specified test current, resistance recorded.
5. Wiring - against the schematic, terminal tightness, ferrule and labelling check, bending radius and segregation of power and control.
6. Dielectric test - power-frequency withstand for one minute at the rated test voltage, insulation resistance measured and recorded.
7. Functional test - protection, interlocks, indication, metering, control logic and, where fitted, communication.
8. Degree of protection - gasket continuity, cable gland plates, door seal compression; IP verification per the stated rating.
9. Final inspection - nameplate data, circuit labelling, drawing pack, spare parts, tidiness, packing.
WHAT YOU RECEIVE
Routine test certificate, design verification evidence, inspection checklist with the tester's mark, material and coating certificates, device certificates, GA and schematic drawings as-built, and the operation and maintenance manual.
INDEPENDENT AND WITNESSED TESTING
Witnessed factory acceptance testing available for EPC and utility projects; this is a standard requirement on Saudi SEC work. Third-party inspection by SGS, BV, TUV or Intertek accepted and coordinated at the buyer's request. Pre-shipment inspection reports with photographs are issued for every order.
MANAGEMENT SYSTEM
ISO 9001 quality management. Incoming material inspection with certificate traceability, in-process inspection at frame, busbar and wiring stages, and final inspection before packing. Non-conformances are recorded, root-caused and closed - a discipline that matters more than any single certificate.
