Medium voltage switchgears HS21

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Offering a high level of safety and approved by classification societies worldwide, the HS21 medium voltage switchgears are mainly used on board LNG ships and large container ships that require high-capacity electrical power generation systems.

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Features

Type tested in accordance with IEC62271-200

  • Arcing due to internal fault test
  • Short-time and peak withstand current test
  • Dilectric test

Full type approval

  • The switchgear and controlgear and the instrument have applied the following standards.
    : IEC 62271-200/100/106, JEC1201 etc
  • Marine classification : ABS, DNV, BV, LR, NK

Metal-clad construction

  • Each section of the HS21 metal-clad switchboard is separated into four compartments.
    ・Circuit breaker
    ・Main bus bar
    ・Cable terminations
    ・Low voltage equipment
  • Segregation between compartments is achieved by the use of metal partitions.

Specifications

Available for 7.2kV and 12kV.
Options are available. For details, please refer to the catalog or contact us through the inquiry form.

  Type
HS21-1 HS21-2 HS21-3 HS21-4
Application
Standard conformance IEC 62271-200 1)
Classification ABS, BV, DNV GL, LR, NK and others
Loss of service continuity category(LSC)/ Partition Class LSC2B-PM
Internal arc classification AFLR
Rating
Rated voltage 7.2kV 12kV
Rated frequency 50 / 60Hz
Rated power frequency withstand voltage 20kV/min 28kV/min
Rated lightning impulse withstand voltage 60kV 75kV
Rated short time withstand current 25kA 1sec (3sec) 2)
Rated peak withstand current 65kA
Internal arc withstand current 25kA 0.2sec (20kA 1sec) 3)
Main busbar current 1250A 2000A 1250A 2000A
Load busbar current 600A 600/1000A 600A 600/1000A
Construction
Switchgear construction Metal-clad
Degree of protection Low voltage compartment IP32
High voltage compartment IP43
HS21-1
Rated voltage 7.2kV
Rated power frequency withstand voltage 20kV/min
Rated lightning impulse withstand voltage 60kV
Main busbar current 1250A
Load busbar current 600A
HS21-2
Rated voltage 7.2kV
Rated power frequency withstand voltage 20kV/min
Rated lightning impulse withstand voltage 60kV
Main busbar current 2000A
Load busbar current 600/1000A
HS21-3
Rated voltage 12kV
Rated power frequency withstand voltage 28kV/min
Rated lightning impulse withstand voltage 75kV
Main busbar current 1250A
Load busbar current 600A
HS21-4
Rated voltage 12kV
Rated power frequency withstand voltage 28kV/min
Rated lightning impulse withstand voltage 75kV
Main busbar current 2000A
Load busbar current 600/1000A
Common
Application
Standard conformance IEC 62271-200 1)
Classification ABS, BV, DNV GL, LR, NK and others
Loss of service continuity category(LSC)/ Partition Class LSC2B-PM
Internal arc classification AFLR
Rating
Rated frequency 50 / 60Hz
Rated short time withstand current 25kA 1sec (3sec) 2)
Rated peak withstand current 65kA
Internal arc withstand current 25kA 0.2sec (20kA 1sec) 3)
Construction
Switchgear construction Metal-clad
Degree of protection Low voltage compartment IP32
High voltage compartment IP43

Notes
1)3sec on request
2)With arc gas exhaust duct

Dimensions

Dimensions vary depending on the panel type.

Panel type W (mm) H1 (mm) H2 (mm) D (mm)3)
Generator panel 650 2300 2800 1680

18804)
Feeder panel
Incoming panel
EVT panel
Motor panel
Soft start motor panel
Bus-tie panel 1 1)
Bus riser & EVT panel 800
Bus-tie panel 2 2) 900
Sync panel 1000
ATr panel 1000
Generator/Feeder/Incoming/EVT/Motor/Soft Starter/Bus-tie 1)
W(mm) 650
H1(mm) 2300
H2(mm) 2800
D(mm) 3) 1680 / 1880 4)
Bus riser & EVT panel
W(mm) 800
H1(mm) 2300
H2(mm) 2800
D(mm) 3) 1680 / 1880 4)
Bus-tie panel 2 2)
W(mm) 900
H1(mm) 2300
H2(mm) 2800
D(mm) 3) 1680 / 1880 4)
Sync / Atr Panel
W(mm) 1000
H1(mm) 2300
H2(mm) 2800
D(mm) 3) 1680 / 1880 4)

Notes
1) LNG vessel only
2) Container vessel only
3) With panel thickness
4) Top cable entry only

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