Fixed and withdrawable low voltage assemblies up to 6300A for industrial plants, buildings and utility projects.
Low voltage switchgear is where most projects are actually won or lost — it is the board the client sees every day, the one that must absorb every feeder change without a shutdown, and the one that has to pass the local inspector.
We build fixed, withdrawable and modular assemblies up to 6300 A, using internationally available breakers (or your preferred brand), with busbars sized and braced to the short-circuit level you specify.
The economical choice for distribution rooms, pump houses and workshops where feeders rarely change. Robust frame, generous wiring space, easy to maintain.
| Parameter | Unit | Value |
|---|---|---|
| Rated insulation voltage | V | 690 |
| Rated working voltage | V | 400 / 415 / 440 / 690 |
| Rated frequency | Hz | 50 / 60 |
| Rated current of main busbar | A | 400 / 630 / 800 / 1000 / 1250 / 1600 / 2000 / 2500 / 3200 |
| Rated short-time withstand current | kA | 15 / 30 / 50 (1 s, typical) |
| Rated peak withstand current | kA | 30 / 63 / 105 (typical) |
| Internal separation | — | Form 1–Form 2 (optional Form 3b) |
| Degree of protection | — | IP30 (standard) / IP40 / IP54 |
| Typical cabinet width | mm | 600 / 800 / 1000 / 1200 |
| Standards | — | IEC 61439-1 / -2, GB 7251.1 |
When a plant cannot afford a long shutdown, withdrawable functional units let maintenance happen on a live board. These are the three standard Chinese modular systems, in ascending order of current rating and accessibility.
| System | Type | Max rated current | Short-time withstand | Typical use |
|---|---|---|---|---|
| GCK | Withdrawable, standard modular | 3150 A | up to 80 kA / 1 s | General industrial distribution, pump and fan control |
| GCS | Withdrawable, modular, higher rating | 4000 A | up to 100 kA / 1 s | Large plants, substation LV side, MCC |
| MNS | Modular, 25 mm module, full Form 4 | 6300 A | up to 100 kA / 1 s | Data centres, refineries, critical process plants |
| XL-21 | Fixed, single-front power cabinet | 630 A | 15–30 kA / 1 s | Small distribution, machine-side power |
| JP | Integrated distribution box | 400 A | 15 kA / 1 s | Pole-mounted rural and residential distribution |
Incomer, bus-tie, motor starter (DOL / star-delta / soft start / VFD), capacitor, feeder and metering units — all built as interchangeable drawers.
Form 1 through Form 4b: busbars, functional units, terminals and cable ways separated to the degree your specification or insurer requires.
Digital multi-function meters, power quality analysers, PLC control, ATS/AMF logic and optional Modbus TCP / IEC 61850 gateways.
| Item | Detail |
|---|---|
| System data | Rated voltage, frequency, prospective short-circuit current and duration |
| Main busbar | Rated current, copper or aluminium, incoming arrangement (single or double ended) |
| Circuit list | Each feeder: rating, breaker type (ACB / MCCB / MCB), function, cable size, protection setting |
| Motor starters | Motor rating, starting method, control voltage, local or remote |
| Compensation | Required kVAr, automatic stages, detuned reactor (for harmonic-rich plants) |
| Layout | Room dimensions, cable entry direction, front / rear access, transport constraints |
| Environment | Ambient temperature, altitude, humidity, dust, corrosive atmosphere |
| Standards & marking | IEC or local standard, IP rating, language of labels and manuals |
A single-line diagram plus a circuit list is usually enough for a firm quotation. If you only have a load summary, send that — we can help you build the circuit list.
Send the single-line diagram or load list. We will confirm the busbar rating, breaker selection and price within 24 hours.
