Dark industrial switchgear cabinet lineup concept used as the complete switchgear cabinets hero background
LV cabinet series

Low-Voltage Distribution Cabinets for Transformer Secondary LV Rooms

Low-voltage distribution cabinets for transformer secondary distribution, MCC feeders, APFC, lighting panels and indoor LV power rooms.

380/400/660/690 VMNS / GCK / GGD / GCSDrawer, fixed, APFC and outdoor box
Request LV Cabinet Quote
380/400/660/690 VVoltage options for transformer secondary LV rooms and MCC feeders.
600-6300 A rangeCore and support data cover GCK, GGD, MNS, GCS, MLS-V, Mdmax ST and Blockset current classes.
IP30 / IP40 / IP43 / IP44 / IP54Protection-degree options depend on selected cabinet construction and room conditions.
Series and ratings

Low-Voltage Distribution Cabinet Series and Rating Data

Compare MNS, GCK, GGD, GCS and support cabinets by construction, voltage class, rated current, short-circuit level, IP degree and application scope before opening the SPEC data.

MNS low-voltage drawer switchgear lineup
Core drawer LV switchgear

MNS Drawer Switchgear

Withdrawable switchgear for distribution, conversion and control where feeder interchangeability and local, remote or automatic operation are required.

380-660 V4000 A horizontal busbar50/80 kA short-time withstandIP30/IP40/IP54

Standards include IEC439, GB/T7251.1 and GB7251.

GCK low-voltage distribution cabinet lineup
Drawer distribution and MCC cabinet

GCK Drawer Switchgear

Drawer-type LV distribution and MCC switchgear for three-phase AC 50/60 Hz systems with 30/50 kA breaking reference and compact maintenance access.

380/400/660 V630-3150 A30/50 kA optionIP40 or IP30

Useful for power plants, substations, industry, hotels, airports and docks.

GGD fixed low-voltage switchgear cabinet with busbar compartment open
Fixed low-voltage board

GGD Fixed Switchgear

Fixed-type switchgear for power conversion, distribution and control where simple operation and a fixed outgoing board fit the LV room.

400/690 V630-4000 AGGD1/GGD2/GGD315/30/50 kA classes

Built around al-zinc steel sheet, indoor installation and fixed-board maintenance planning.

GCS low-voltage drawer switchgear cabinet image
Drawer cabinet with MCC vertical bus data

GCS Drawer Switchgear

Drawer-type LV switchgear with configurable circuits and interchangeable feeder units for distribution rooms and MCC feeders.

AC 380(400),(600) V4000(6300) A horizontal bus1000 A vertical busIP30

Includes three-phase four-wire and five-wire busbar references.

MLS-V low-voltage drawer switchgear cabinet image
Factory-assembled drawer cabinet

MLS-V Drawer Switchgear

Drawer-type switchgear for power supply, distribution, conversion, control and reactive power compensation support.

<=AC 400 V<=5000 A main busbar6/8 kV impulse withstandIP55 current note

Standards include GB7251.1, GB7251.12, JB/T9661, IEC60439-1 and BS EN60439-1.

Mdmax ST low-voltage drawer switchgear cabinet image
High-current drawer cabinet

Mdmax ST Drawer Switchgear

Drawer-type switchgear using aluminium-zinc coated plate double-folding frame technology for higher busbar withstand requirements.

400/690 VACUp to 6300 A main busbar100 kA short-time withstand220 kA peak withstand

Supports drawer, movable and insert functional units, with up to 36 drawer loops.

GGJ low-voltage APFC reactive power compensation cabinet image
Reactive power compensation cabinet

GGJ APFC Cabinet

Low-voltage APFC cabinet for improving power factor and power quality when compensation belongs in the LV scope.

400 VUp to 4000 A50/60 HzAC 3 phase

Supports RS-232/485, wireless or GPRS communication and zero-crossing switching.

JP outdoor integrated low-voltage distribution box image
Outdoor transformer distribution box

JP Outdoor Integrated Distribution Box

Outdoor integrated distribution box for pole transformer secondary distribution, urban grid renovation and rural grid renovation.

30-400 kVA transformerAC 400 VMax 630 AIP44

Includes metering, reactive power compensation, distribution and leakage protection scope.

XL-21 enclosed low-voltage power panel image
Power, lighting and motor-control panel

XL-21 Enclosed Power Panel

Enclosed low-voltage power panel for distribution, lighting distribution and industrial or mining motor-control work.

380 V690 V insulation100-630 A branch currentIP43

Includes 2500 V / 1 min power-frequency withstand and 16/31.5/40.5 kA breaking reference.

Blockset modular low-voltage switchgear cabinet image
Modular withdrawable or fixed cabinet

Blockset Modular LV Switchgear

Modular LV switchgear for distribution systems and motor protection using standardized prefabricated cabinet modules.

380/480/690 V600-6300 AIP30/IP43/IP54250 kW motor capacity

Use as a support option when modular withdrawable or fixed LV cabinet construction is requested.

Core drawer LV switchgear

MNS Drawer Switchgear Specifications

Withdrawable switchgear for distribution, conversion and control where feeder interchangeability and local, remote or automatic operation are required.

Rated frequency50/60 Hz
Rated voltage380 V to 660 V
Rated insulation voltage660 V to 1000 V
Horizontal busbar rated current4000 A
Vertical busbar rated current2000 A / 1000 A
Horizontal busbar short-time withstand50/80 kA
Vertical busbar short-time withstand50 kA
Horizontal busbar peak withstand105/176 kA
Vertical busbar peak withstand105 kA
Impulse withstand voltage8 kV
Auxiliary circuit voltageAC 380 V, AC 220 V, DC 220 V
Maximum incoming/outgoing breaker4000 A
Protection levelIP30, IP40, IP54
Operation modeLocal, remote or automatic
StandardsIEC439; GB/T7251.1; GB7251
Installation conditionIndoor use
Service temperature-15 C to +40 C; 24 h average <= +35 C
Altitude<= 2000 m
HumidityDaily relative humidity <= 95%; monthly average <= 90%
Seismic intensity<= 8
Site restrictionsNo fire, explosion, serious pollution, chemical corrosion or violent vibration
Additional insulation voltageAC 660 V
Additional operational voltageAC 400 V
Additional rated frequency50 Hz
Additional protection levelIP30, IP40
Additional horizontal bus630 A to 3150 A
Additional vertical bus630 A to 1000 A
Main circuit connectors125 A, 200 A, 400 A
Control circuit connectors32 A
Maximum feeding circuit current1600 A
Withstand electric circuit current630 A to 3150 A
Drawer distribution and MCC cabinet

GCK Drawer Switchgear Specifications

Drawer-type LV distribution and MCC switchgear for three-phase AC 50/60 Hz systems with 30/50 kA breaking reference and compact maintenance access.

Rated voltage380 V, 400 V, 660 V
Rated current630 A to 3150 A
MaterialGalvanized steel
Dimensions reference(400-800) x (600-1000) x 2200 mm
InstallationIndoor
Product colorGrey
ApplicationPower distribution
Frequency50/60 Hz
PhaseAC 3 phase
Protection levelIP40; IP30 option in additional data
Additional insulation voltageAC 660 V
Additional operational voltageAC 380 V
Additional frequency50 Hz
Horizontal bus630 A to 3150 A
Vertical bus630 A to 1000 A
Main circuit connectors125 A, 200 A, 400 A
Control circuit connectors20 A
Maximum feeding circuit current1600 A
Withstand electric circuit current630 A to 3150 A
Short-time withstand current30/50 kA effective value
Peak withstand current63/105 kA
Unit drawer breaking capacity30-50 kA
Auxiliary circuit working voltageDC 110/220 V; AC 63-380 V
StandardsIEC439; NEMA ICS2-322; GB7251-87; ZBK36001-89; GB7251
Use scopePower conversion, distribution, PC feeders and MCC control
Electrical features30/50 kA breaking reference, dynamic and thermal withstand values, configurable scheme, compact layout and maintenance access
Fixed low-voltage board

GGD Fixed Switchgear Specifications

Fixed-type switchgear for power conversion, distribution and control where simple operation and a fixed outgoing board fit the LV room.

Rated voltage400 V, 690 V
Rated current630 A to 4000 A
MaterialAl-zinc steel sheet
Dimensions reference(400-800) x (600-1000) x 2200 mm
InstallationIndoor
Product colorGrey
ApplicationPower distribution
Frequency50/60 Hz
PhaseAC 3 phase
HS code8537109090
StandardsGB7251
Cabinet structureFixed cabinet with cold-bent section-steel welded frame and 20 mm modular mounting holes
Service temperature-5 C to +40 C; 24 h average <= +35 C
Altitude<= 2000 m
HumidityRelative humidity <= 50% at +40 C; may reach 90% at +20 C
Mounting inclination<= 5 degrees
Site restrictionsNo severe vibration, impact or corrosion
GGD1 voltage0.4 (0.66) kV
GGD1 rated currentA 1000 A; B 600/630 A; C 400 A
GGD1 breaking / withstand / peak15 kA / 15 kA / 30 kA
GGD2 voltage0.4 (0.66) kV
GGD2 rated currentA 1500/1600 A; B 1000 A; C 630 A
GGD2 breaking / withstand / peak30 kA / 30 kA / 63 kA
GGD3 voltage0.4 (0.66) kV
GGD3 rated currentA 3150-6300 A; B 2500 A; C 2000 A
GGD3 breaking / withstand / peak50 kA / 50 kA / 105 kA
Drawer cabinet with MCC vertical bus data

GCS Drawer Switchgear Specifications

Drawer-type LV switchgear with configurable circuits and interchangeable feeder units for distribution rooms and MCC feeders.

Main circuit voltage ratingAC 380(400), (600) V
Auxiliary circuit rated voltageAC 200/380(440) V; DC 110/220 V
Rated frequency50(60) Hz
Rated insulation voltage660(1000) V
Horizontal bus rated currentUp to 4000(6300) A
Vertical bus MCC rated current1000 A
Busbar short-time withstand50/80 kA for 1 s
Busbar peak withstand105/176 kA
Power-frequency test voltage, main circuit2500 V / 1 s
Power-frequency test voltage, auxiliary circuit2000 V / 1 s
Three-phase four-wire busbarA, B, C, PEN
Three-phase five-wire busbarA, B, C, PE, N
Protection levelIP30
Weight reference650 kg
StandardsGB7251
ApplicationPower plant, substation, distribution room, industrial, commercial and building projects
Electrical featuresConfigurable circuit scheme, interchangeable drawer units, operation access and maintenance access
Factory-assembled drawer cabinet

MLS-V Drawer Switchgear Specifications

Drawer-type switchgear for power supply, distribution, conversion, control and reactive power compensation support.

Main circuit rated operational voltage<= AC 400 V
Auxiliary circuit rated operational voltage<= AC 380 V, <= DC 220 V
Rated insulation voltageAC 690 V
Rated impulse withstand voltage6/8 kV
Main busbar rated operating current<=5000 A; <=3600 A for MLS double-side cabinet
Vertical bus rated operating current790/1000/1250/1600 A draw-out type; W2500 plug-in type MCCB; <=2500 A plug-in MCCB
Vertical bus short-time withstand50/65/80/100 kA for 1 s
Main busbar short-time withstand50/65/80/90 kA for 1 s
Main busbar peak withstand105/143/176/220 kA for 0.1 s
Vertical bus peak withstand105/143/176/198 kA for 0.1 s
IP55 current noteWhen protection grade is IP55, main busbar rated current is less than 2500 A
StandardsGB7251.1; GB7251.12; JB/T9661; IEC60439-1; BS EN60439-1
Functional usePower supply, distribution, conversion, control and reactive power compensation support
High-current drawer cabinet

Mdmax ST Drawer Switchgear Specifications

Drawer-type switchgear using aluminium-zinc coated plate double-folding frame technology for higher busbar withstand requirements.

Rated insulation voltage690/1000 VAC, 3P; 1500 V DC
Rated operational voltage400/690 VAC, 3P; 750 V DC
Rated impulse withstand voltage Uimp6/8/12 kV
Overvoltage levelII/III/IV
Class of pollution3
Rated operating frequencyUp to 60 Hz
Main busbar rated currentUp to 6300 A
Main busbar peak withstandUp to 220 kA
Main busbar short-time withstandUp to 100 kA
Distribution bus rated currentUp to 2000 A
Distribution bus peak withstandUp to 176 kA
Distribution bus short-time withstandUp to 80 kA
Functional unitsDrawer, movable and insert units; up to 36 drawer loops
Drawer positioningThree-position drawer loop conversion without reducing protection level
StandardsGB7251.1-2013; IEC60439-1; EN60439.1; DIN-VDE0660; BS5486 part 500; UTE63-410
Reactive power compensation cabinet

GGJ APFC Cabinet Specifications

Low-voltage APFC cabinet for improving power factor and power quality when compensation belongs in the LV scope.

Product nameLow Voltage Reactive Power Compensation Cabinet
Rated voltage400 V
Rated currentUp to 4000 A
MaterialAl-zinc steel sheet
Dimensions reference(400-800) x (600-1000) x 2200 mm
InstallationIndoor
Product colorGrey
ApplicationImproving power quality
Frequency50/60 Hz
PhaseAC 3 phase
HS code8537109090
Cabinet matchingCan combine with MNS, GCK and GGD LV cabinets
Compensation combinationsFlexible capacitance compensation combinations
CommunicationRS-232/485, wireless or GPRS remote communication
Switching functionZero-crossing trigger and cut-off
Service life referenceMore than 100000 hours
Outdoor transformer distribution box

JP Outdoor Integrated Distribution Box Specifications

Outdoor integrated distribution box for pole transformer secondary distribution, urban grid renovation and rural grid renovation.

Transformer capacity30-400 kVA
Rated operating voltageAC 400 V
Auxiliary circuit operating voltageAC 220 V / AC 380 V
Rated frequency50 Hz
Rated currentMax 630 A
Leakage-current setting30-300 A adjustable
Protection levelIP44
Function integrationMetering, reactive power compensation and distribution functions
Protection functionsShort-circuit, overload, overvoltage and leakage protection
ApplicationOutdoor column transformer distribution, urban grid renovation and rural grid renovation
Service temperature-25 C to +40 C
HumidityDaily/monthly relative humidity <= 90%
Altitude<= 1000 m
Site restrictionsNo severe vibration, impact or corrosive gas
Power, lighting and motor-control panel

XL-21 Enclosed Power Panel Specifications

Enclosed low-voltage power panel for distribution, lighting distribution and industrial or mining motor-control work.

Rated voltage380 V
Rated insulation level690 V
1 min power-frequency withstand voltage2500 V
Rated current of main circuit>630 A
Branch current100-630 A
Rated short-circuit breaking current16/31.5/40.5 kA
Protection class of shellIP43
Application voltage scopeAC 500 V or below
System typeThree-phase three-wire, four-wire or five-wire
Use scopeDistribution, lighting distribution and motor-control work
Altitude<= 2000 m
Service temperature-25 C to +40 C; 24 h average <= +35 C
Storage and transport temperature-25 C to +55 C; short time <= +70 C
HumidityRelative humidity <= 50% at +40 C
Mounting inclination<= 5 degrees
Modular withdrawable or fixed cabinet

Blockset Modular LV Switchgear Specifications

Modular LV switchgear for distribution systems and motor protection using standardized prefabricated cabinet modules.

Rated voltage380 V, 480 V, 690 V
Rated current600 A to 6300 A
Product materialAluminium
Rated insulating voltage1000 V
InstallationIndoor
Module unit40
Cubicle typeWithdrawable or fixed
Frequency50/60 Hz
PhaseAC 3 phase
Protection degreeIP30, IP43, IP54
Maximum inlet and outlet switch6300 A
Maximum motor capacity250 kW
Standard basisConfirm the applicable standard number before quotation
Product characteristicsCoordinated protection devices, standardized prefabricated modules, communication and protection functions
Service temperature-5 C to +40 C; daily average <= +35 C
Altitude<= 2000 m
HumidityRelative humidity <= 50% at +40 C; may reach 90% at +20 C
Seismic intensity<= 7 Richter
01

System rating

Voltage and incoming current

Check voltage class, transformer capacity, incoming ACB or MCCB rating and main current before selecting the cabinet series.

02

Short-circuit level

Withstand and breaking capacity

Match the available fault current with switchgear short-time withstand, peak withstand and breaker interrupting ratings.

03

Busbar system

Main and distribution busbars

Confirm horizontal and vertical busbar current, bus bridge or bus duct need, and any derating from the selected cabinet arrangement.

04

Outgoing circuits

Load list and protection devices

List outgoing circuit ratings, motor-control loads, spare ways, MCCB, ACB or fuse package, and selectivity requirements.

05

Cabinet construction

Drawer, fixed or support cabinet

Choose drawer MCC, fixed board, APFC, metering panel or JP outdoor box after the electrical duty is clear.

06

Cable entry and access

Top or bottom entry

Confirm cable entry, trench position, cable size, rear access, busbar connection and door clearance before layout work.

Site conditions

Low-Voltage Distribution Cabinet Application and Installation Conditions

Match the cabinet to the installation environment before final layout. Indoor LV rooms, outdoor transformer secondary boxes, APFC sections and enclosed panels use different access, protection and ambient limits.

01

Indoor LV switchgear room

Use MNS, GCK, GGD, GCS, MLS-V, Mdmax ST or Blockset for transformer secondary distribution, MCC feeders and indoor power rooms.

02

Outdoor transformer secondary

Use JP outdoor distribution boxes where metering, reactive compensation, outgoing distribution and leakage protection are required near the transformer.

03

APFC and metering section

Use GGJ or metering panels when the LV system needs reactive compensation, CT metering, communication or power-factor control.

04

Sub-distribution and lighting panel

Use XL-21 where the project needs an enclosed power panel, lighting distribution board or smaller motor-control panel instead of a full LV lineup.

Delivery controls

Low-Voltage Distribution Cabinet Drawings, Routine Tests and Packing

After the cabinet series and ratings are fixed, align the drawings, routine verification and packing details that control production release and shipment.

01

General arrangement drawing

Overall dimensions, cabinet lineup, cable entry direction, busbar position, room clearance and section split.

02

SLD and wiring drawings

Incoming and outgoing circuit devices, metering, APFC, auxiliary control, terminal wiring and communication interface.

03

Routine verification

Degree of protection, internal wiring, protective circuit, dielectric check, mechanical operation, interlock and nameplate consistency.

04

Packing and handling

Cabinet split, lifting point, moisture protection, packing marks, pallet or wooden-case method and destination standard.

What is a low-voltage distribution cabinet used for?

It distributes transformer secondary power to LV feeders, MCC loads, APFC sections, lighting panels and indoor or outdoor distribution points.

How do I choose between MNS, GCK, GGD and GCS cabinets?

Use drawer cabinets such as MNS, GCK or GCS for interchangeable feeder units and MCC maintenance. Use fixed cabinets such as GGD when the circuit plan is stable.

What electrical data is needed before quotation?

Send the SLD, rated voltage, rated current, short-circuit level, busbar current, outgoing circuit list, cable entry and preferred cabinet construction.

Can APFC, metering or JP outdoor boxes be included?

Yes. Include GGJ, JP, XL-21 or metering panels when they belong to the same transformer secondary system or LV outgoing circuit list.

Project-based quotation

Request a Low-Voltage Distribution Cabinet Quote

Send the SLD, rated voltage, rated current, short-circuit level, outgoing circuit list, cabinet quantity and destination standard. XIYA POWER will confirm the series, drawing scope and packing requirement.

Request LV Cabinet Quote