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Mark V Circuit-Switchers
Outdoor Transmission (34.5 kV through 345 kV)
Table of Contents
Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Qualified Persons � � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Read this Instruction Sheet � � � � � � � � � � � � � � � � � � � 2
Retain this Instruction Sheet� � � � � � � � � � � � � � � � � � � 2
Proper Application � � � � � � � � � � � � � � � � � � � � � � � � � � 2
Special Warranty Provisions � � � � � � � � � � � � � � � � � � � 3
Warranty Qualifications � � � � � � � � � � � � � � � � � � � � � � 3
Safety Information � � � � � � � � � � � � � � � � � � � � � � � � 4
Understanding Safety-Alert Messages � � � � � � � � � � � 4
Following Safety Instructions � � � � � � � � � � � � � � � � � � 4
Replacement Instructions and Labels � � � � � � � � � � � 4
November 27, 2023
© S&C Electric Company 1976-2023, all rights reserved
Inspection Recommendations
Safety Precautions � � � � � � � � � � � � � � � � � � � � � � � 5
Inspection Recommendations � � � � � � � � � � � � � � 6
Before Starting � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Recommended Inspection Schedule � � � � � � � � � � � 6
Recommended Inspection Procedures � � � � � � � � � � 9
Resistance Values � � � � � � � � � � � � � � � � � � � � � � � � � �10
Instruction Sheet 711-590
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Summary of Contents for S&C Mark V
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Page 1: Table Of Contents
Mark V Circuit-Switchers Outdoor Transmission (34.5 kV through 345 kV) Inspection Recommendations Table of Contents Introduction � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 2 Safety Precautions �... -
Page 2: Introduction
PDF format at https://www�sandc�com/en/contact-us/product-literature/� Retain this This instruction sheet is a permanent part of the Mark V Circuit-Switcher. Store a copy in the CS-1A Switch Operator’s instruction book holder, or designate a location where users can easily Instruction retrieve and refer to this publication. -
Page 3: Special Warranty Provisions
Special The standard warranty contained in the seller’s standard conditions of sale, as set forth in Price Sheet 150, applies to Mark V Circuit-Switchers and accessories and associated switch operators, Warranty except the first paragraph of the said warranty is replaced by the following:... -
Page 4: Safety Information
Safety Information Understanding Several types of safety-alert messages may appear throughout this instruction sheet and on labels and tags attached to the Mark V Circuit-Switcher. Become familiar with these types of messages Safety-Alert and the importance of these various signal words:... -
Page 5: Safety Precautions
Safety Precautions DANGER Mark V Circuit-Switchers operate at high voltage� Failure to observe the precautions below will result in serious personal injury or death� Some of these precautions may differ from company operating procedures and rules� Where a discrepancy exists, follow your company’s operating procedures and rules�... -
Page 6: Inspection Recommendations
Recommended Inspection Schedule A mechanical-operations test value is indicated in Table 1 on pages 7 and 8 for those Mark V Circuit-Switcher compo- nents affected by the number of mechanical operations performed. It is a guideline to the number of Open/Close operations expected for the component before replace- ment is required. - Page 7 Inspection Recommendations Table 1� Recommended Inspection Schedule for S&C Mark V Circuit-Switcher Components Electrical-Operations Limit Inspection Frequency ② Mechanical- Operations Number Number of Open/Close Operations Test Value ① of Years Maximum Circuit- Number of Component Number of Application Current, Switcher...
- Page 8 Inspection Recommendations Table 1� Recommended Inspection Schedule for S&C Mark V Circuit-Switcher Components—Continued Mechanical- Electrical-Operations Limit Inspection Frequency ② Operations Number Test Number of Open/Close Operations of Years Maximum Circuit- Number of Component Value ① Application Current, Switcher Open/Close Number of...
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Page 9: Recommended Inspection Procedures
Table 2� Recommended Inspection Procedures for S&C Mark V Circuit-Switcher Components Component Inspection Procedures 1� Check with the nearest S&C Sales Office to determine whether there are any outstanding field notifications involving inspection, maintenance, or retrofit�... -
Page 10: Resistance Values
Inspection Recommendations Table 2� Recommended Inspection Procedures for S&C Mark V Circuit-Switcher Components—Continued Component Inspection Procedures 1� Check for evidence of damage, excessive corrosion, or wear—especially at the fault-closing contacts and current-carrying contacts� Replace current-carrying jaw contacts if the silver-alloy inserts on two or more contact fingers are worn to the extent the blade tongue contact engages the full width of the contact finger�... - Page 11 Inspection Recommendations Table 3� Allowable Resistance Values for S&C Mark V Circuit-Switcher, Vertical-Break And Integer Styles ⑤ ④ ③ ② ① ⑥ ⑦ Allowable Resistance In Microhms, Between Points In Megohms, 2-3, Interrupter Closed Gaps Between Points Continuous 2-3, Interrupter Continuous ●...
- Page 12 Inspection Recommendations Table 4� Allowable Resistance Values For S&C Mark V Circuit-Switcher, Center-Break Style ⑧ ③ ④ ① ⑨ ⑦ ⑥ ⑤ ② Allowable Resistance In Microhms, Between Points In Megohms, Cont� 5-6, Interrupter Closed Between Current, Gaps Points 5-6,...
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