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Medium-Voltage Metal-Clad Non-Arc-Resistant Switchgear

Type GM-SG (5 kV - 15 kV)

Ratings

Constant kA basis - ANSI/IEEE C37.06-2009

These ratings are in accordance with:

  • ANSI/IEEE C37.04-1999 Standard Rating Structure for AC High-Voltage Circuit Breakers

  • ANSI/IEEE C37.06-2009 AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis - Preferred Ratings and Related Required Capabilities for Voltages Above 1,000 Volts

  • ANSI/IEEE C37.09-1999 Standard Test Procedure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis

  • ANSI/IEEE C37.010-1999 Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis.

Circuit Breaker Type1

Maximum Design Voltage (V)2 kV rms

Voltage Range Factor (k)3

Withstand Voltage Levels/ Power Frequency kV rms

Withstand Voltage Levels/ Lightning Impulse (BIL) kV crest

Continuous Current4 A rms

Short-Circuit (I)5,6 kA rms sym

5-GMSG-40-xxxx-104

4.76

1.0

19

60

1,200, 2,000, 3,000, 4,000FC

40

5-GMSG-50-xxxx-130

4.76

1.0

19

60

1,200, 2,000, 3,000, 4,000FC

50

5-GMSG-63-xxxx-164

4.76

1.0

19

60

1,200, 2,000, 3,000, 4,000FC

63

7-GMSG-40-xxxx-104

8.25

1.0

36

95

1,200, 2,000, 3,000, 4,000FC

40

15-GMSG-25-xxxx-65

15

1.0

36

95

1,200, 2,000

25

15-GMSG-40-xxxx-104

15

1.0

36

95

1,200, 2,000, 3,000, 4,000FC

40

15-GMSG-50-xxxx-130

15

1.0

36

95

1,200, 2,000, 3,000, 4,000FC

50

15-GMSG-63-xxxx-164

15

1.0

36

95

1,200, 2,000, 3,000, 4,000FC

63

Circuit Breaker Type1

Interrupting Time7 ms/cycles

Permissible Tripping Delay (y) Sec

Maximum Symmetrical Interrupting (I) kA rms sym

% dc Component

Short Time Current (I) (Three Seconds) kA rms

Closing and Latching (Momentary) Asymmetrical (1.55 x I) kA rms

Closing and Latching (Momentary) Peak (2.6 x I) peak

5-GMSG-40-xxxx-104

83/5

2

40

47

40

62

104

5-GMSG-50-xxxx-130

83/5

2

50

47

50

78

130

5-GMSG-63-xxxx-164

83/5

2

63

47

63

98

164

7-GMSG-40-xxxx-104

83/5

2

40

47

40

62

104

15-GMSG-25-xxxx-65

83/5

2

25

47

25

39

65

15-GMSG-40-xxxx-104

83/5

2

40

47

40

62

104

15-GMSG-50-xxxx-130

83/5

2

50

47

50

78

130

15-GMSG-63-xxxx-164

83/5

2

63

47

63

98

164

Footnotes:

1 “xxxx” in type designation refers to the continuous current rating 1,200 A, 2,000 A or 3,000 A, as appropriate. The 4,000 A fan-cooled rating is achieved using a 3,000 A circuit breaker, in combination with fan cooling as indicated in Footnote 4.

2 Maximum design voltage for which the circuit breaker is designed and the upper limit for operation.Maximum design voltage for which the circuit breaker is designed and the upper limit for operation.

3 K is listed for information purposes only. For circuit breakers rated on a "constant kA" ratings basis, the voltage range factor is 1.0.K is listed for information purposes only. For circuit breakers rated on a "constant kA" ratings basis, the voltage range factor is 1.0.

4 4,000FC indicates that fan cooling is included in the switchgear structure for this rating. 4,000 A rating is not available in outdoor equipment. 4,000FC indicates that fan cooling is included in the switchgear structure for this rating. 4,000 A rating is not available in outdoor equipment.

5 All values apply to polyphase and line-to-line faults.All values apply to polyphase and line-to-line faults.

6 Standard duty cycle is O - 0.3s - CO - 3 min. - CO.Standard duty cycle is O - 0.3s - CO - 3 min. - CO.

7 Standard rating interrupting time is five-cycles (83 ms). Optional rated interrupting time of three-cycles (50 ms) is available (except with 24 Vdc tripping).Standard rating interrupting time is five-cycles (83 ms). Optional rated interrupting time of three-cycles (50 ms) is available (except with 24 Vdc tripping).


Type GMSG Circuit Breaker

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