OEM components

Siemens is pleased to announce our new and expanded offering of OEM components for OEMs building ANSI switchgear.

Siemens 5 kV - 15 kV type GM-SG switchgear product offering features the class-leading Siemens type 3AH3 circuit breaker operating mechanism, now with up to 63 kA interrupting capability (available as integrator switchgear only). This is the same circuit breaker operator used in our type GM38 switchgear product, building on a heritage of more than 30 years of operators in the 3A family.

Fast-delivery type GM-SGY skeletons are offered up to 50 kA in the following configurations^{1, 2}:

Footnotes:

¹ Voltage transformer has been abbreviated as VT.
² Control power transformer has been abbreviated as CPT.

Siemens offers the following type GM-SGY cell parts kits up to 50 kA^1-6:

Footnotes:

¹ Circuit breaker cell parts kits are ordered by part number.
² Rollout tray parts kits do not include transformers andprimary or secondary fuses.
³ Rollout tray parts kits are ordered by part number.
⁴ Consult factory
⁵ Voltage transformer has been abbreviated as VT.
⁶ Control power transformer has been abbreviated as CPT.

Siemens offers the following type GM-SGY rollout trays without transformer or fuses^1,2:

Footnotes:

¹ Voltage transformer has been abbreviated as VT.
² Control power transformer has been abbreviated as CPT.

Siemens offers the following optional equipment with type GM-SG OEM components:

Type GMSG circuit breaker ratings are in accordance with the following standards^{3, 7, 8, 9}:

Footnotes:

¹ “xxxx” in type designation refers to the self-cooled 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 is the upper limit for operation.
³ For circuit breakers rated on a “constant kA basis”, the voltage range factor is 1.0.
⁴ 4,000FC indicates fan cooling is required in the switchgear structure for this rating. The 4,000 A rating is not available in outdoor equipment.
⁵ All values apply to polyphase and line-to-line faults.
⁶ Standard duty cycle is O - 0.3 s - CO - 3 min. - CO.
⁷ Standard rated interrupting time is five-cycles (83 ms).Optional rated interrupting time of three-cycles (50 ms) is available.
⁸ Type GMSG vacuum circuit breakers are ordered by catalog number. Please consult factory for additional information.
⁹ Reference GM-SG selection and application guide E50001-F710-A122-X-4A00 for additional information about type GMSG circuit breakers.
¹⁰ Circuit breaker elements are sold with Siemens OEM structures or parts kits only. Consult factory for pricing and availability of replacement type GMSG vacuum circuit breaker elements.
¹¹ Equipment rated 63 kA is offered as integrator switchgear only.

Type GMSG circuit breaker ratings are in accordance with the following standards^{2, 3, 11, 12, 13, 14}:

Footnotes:

¹ “xxxx” in type designation refers to the self-cooled 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 is the upper limit for operation.
³ For voltage range factor, K is the ratio of the rated maximum design voltage to the lower limit of the range of operating voltage in which the required symmetrical and asymmetrical interrupting capabilities vary in inverse proportion to the operating voltage. Reference GM-SG selection and application guide E50001-F710-A122-X-4A00 for voltage range factor information on GMSG circuit breakers.
⁴ 4,000FC indicates fan cooling is required in the switchgear structure for this rating. The 4,000 A rating is not available in outdoor equipment.
⁵ To obtain the required symmetrical interrupting capability of a circuit breaker at an operating voltage between 1/K times rated maximum design voltage and rated maximum design voltage, the following formula shall be used: required symmetrical interrupting capability = rated short-circuit current (I) x [(rated maximum design voltage)/(operating voltage)]. For operating voltages below 1/K times maximum design voltage, the required symmetrical interrupting capability of the circuit breaker shall be equal to K times rated short-circuit current.
⁶ Within the limitations stated in ANSI/IEEE C37.04-1979, all values apply to polyphase and line-to-line faults. For single phase-to-ground faults, the specific conditions stated in clause 5.10.2.3 of ANSI/IEEE 37.04-1979 apply.
⁷ Current values are not to be exceeded even for operating voltage below 1/K times rated maximum design voltage.For operating voltages between rated maximum design voltage and 1/K times rated maximum design voltage, follow footnote 5.
⁸ Current values are independent of operating voltage up to and including rated maximum voltage.
⁹ “Nominal three-phase MVA class” is included for reference only. This information is not listed in ANSI C37.06-1987.
¹⁰ Standard duty cycle is CO - 15 s - CO.
¹¹ Standard rated interrupting time is five-cycles (83 ms). Optional rated interrupting time of three-cycles (50 ms) is available.
¹² Type GMSG vacuum circuit breakers are ordered by catalog number. See page 9 for additional information.
¹³ Reference GM-SG selection and application guide E50001-F710-A122-X-4A00 for additional information on GMSG circuit breakers.
¹⁴ Circuit breaker elements are sold with Siemens OEM structures or parts kits only. Consult factory for pricing and availability of replacement type GMSG vacuum circuit breaker elements.

Siemens offers the following optional equipment for the type GMSG circuit breaker: