1. www.hyundai-elec.com
Cubicle Type
Gas Insulated
Switchgear
: HMGS
• MGS Cubicle type gas insulated switchgear is an integrated assembly of
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vacuum circuit breaker, 3-position switch, disconnector, bus connecting system
and control devices which are coordinated electrically and mechanically, for
medium voltage power system.
• pplicable single, transfer double bus system.
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• he metal-clad design provides high reliability, easy operation and safety.
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• he switchgear isolated by grounded metal plates prevents live parts from being
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exposed to the operator when door open.
• ompact design of very synoptical construction allows switching section to be
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added and dismantled in very short time without disconnection of busbar.
•The switchgear is available up to 38kV.
• he switchgear and all components are designed, manufactured and tested in
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accordance with the latest following standards :
·EC 62271-200
I ·IEEE C37.100.1
·EC 62271-100
I ·IEEE C37.20.4
·IEC 62271-102 ·IEEE C37.09
·IEC 60265-1 ·IEEE C37.06
·IEC 62271-1 (IEC 60694)

2. Construction : HMGS-G81
Gas Duct
Bursting Disk
Bus Bar Connector
Control Unit
3PS Pole
3PS Mechanism
Vacuum Interupter
Gas Duct
Circuit Breaker Mechanism
Cable Socket Current Transformer
Earth Bus Bar Cable Compartment
Front
Technical Data
Type HMGS-G10/11 HMGS-G81 HMGS-G82
Rated voltage (kV) 12 24 (25.8) 36 38
Maximum operating voltage (kV) 12 24 (25.8) 36 38
Rated power frequency withstand voltage (kV) 281) 701) 70 80
Rated lightning impulse withstand voltage (kV) 75 150 170 150 / 200
All voltage values apply for an
1.0 1.0 1.0
insulating gas pressure, absolute, 20℃ (bar)
Rated frequency (Hz) 50 / 60 50 / 60 60
Rated busbars current (A) 1250 / 2000 1250 / 2500 / 3150 1200 / 2000 / 2500
Rated feeder current (A) 1250 / 2000 1250 / 2500 / 3150 1200 / 2000 / 2500
Rated peak withstand current (kA) 65 104 104
Rated short-time current, 3s (kA) 25 40 40
Rated short-circuit breaking current of circuit breaker (kA) 25 40 40
Rated short-circuit making current of circuit breaker (kA) 65 104 104
Rated operating sequence CO-15s-CO, O-0.3s-CO-3min-CO, O-0.3S-CO-15S-CO
Closing time (ms) ca. 65 ca. 65 ca. 65
Opening time (ms) ca. 45 ca. 45 ca. 32
Breaking time 5 cycle 5 cycle 3 cycle
Insulating gas SF6 2) SF6 2) SF6 2)
Design pressure, 20℃ (bar) 0.6 0.6 0.7
Rated filling pressure, 20℃ (bar) 0.35 0.3 0.4
Minimum operating pressure, 20℃ (bar) 0.2 0.2 0.3
Auxiliary voltage (V) DC 110 / 125 3)
Degree of protection High voltage live parts IP 65
(IEC 60529, DIN VDE 0470) Low voltage compartment IP 4X 4)
Maximum value (℃) +40
Ambient temperature
Minimum value (℃) -5
Altitude for erection above sea level5) (m) 1000
Height (mm) 2300 2400 2200 / 2400
Dimensions Depth (mm) 1200 / 1720* 1760 1900
Width (mm) 550 / 700 6) 600 / 800 7) 800
1) Higher values as per international standards on request 4) Higher values on request 7) 600mm for rated current 630A and 1250A
2) Insulating gas : sulphur hexafluoride 5) Adaption required at greater altitude 800mm for rated current 2000A and 2500A
3) Other auxiliary voltages on request 6) 700mm with voltage transformer Double bus system
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Sales Marketing 75, Yulgok-ro, Jongno-gu, Seoul, Korea Tel: 82-2-746-7899, 7889, 4783 Fax: 82-2-746-7441
Latest Update: April 2012