Specifications

Liebert Static Transfer Switch
6 Guide Specification
• Description of equipment to be furnished, including deviations from these specifications.
1.5.3 Delivery Submittal
Submittals upon STS delivery shall include a complete set of submittal drawings and one (1) installation,
operation and maintenance manual that shall include a functional description of the equipment with block
diagrams, safety precautions, instructions, step-by-step operating procedures and routine maintenance
guidelines, including illustrations.
1.5.4 Spare Parts
A list of recommended spare parts shall be furnished upon request.
1.5.5 User’s List
An in-service user’s list shall be furnished upon request.
1.6 WARRANTY
The manufacturer shall provide a warranty against defects in material and workmanship for 12 months
after initial system start-up or 18 months after ship date, whichever occurs first. (Refer to the Warranty
Statement for details.)
1.7 QUALITY ASSURANCE
1.7.1 Manufacturer Qualifications
A minimum of five year’s experience in the design, manufacture, and testing of STS systems is required
The specified system shall be completely factory-tested before shipment. Testing shall include, but shall
not be limited to: quality control checks, “Hi-Pot” test (two times rated voltage plus 1000 volts, per UL
requirements), transfer tests, and metering calibration tests. The system shall be designed, manufactured,
and tested according to world class quality standards. The manufacturer shall be ISO 9001 certified.
1.7.2 Factory Testing
Before shipment, the manufacturer shall fully and completely test the STS to assure compliance with the
specifications.
2.0 PRODUCT
2.1 FABRICATION
2.1.1 Materials
All materials of the STS shall be new, of current manufacture, high grade and free from all defects and
shall not have been in prior service except as required during factory testing.
The maximum working voltage, current and di/dt of all solid-state power components and electronic
devices shall not exceed 75% of the ratings established by their manufacturer. The operating temperature
of solid-state component sub-assembly shall not be greater than 75% of their ratings.
2.1.2 Wiring
Wiring practices, materials and coding shall be in accordance with the requirements of the National
Electrical Code (NFPA 70). All bolted connections of bus bars, lugs, and cables shall be in accordance
with requirements of the National Electrical Code and other applicable standards. All electrical power
connections are to be torque to the required value and marked with a visual indicator.