IEEE Std 650-2017 pdf free download – IEEE Standard for Qualification of Class 1E Static Battery Chargers, Inverters, and Uninterruptible Power Supply Systems for Nuclear Power Generating Stations.
4. Specifications
4.1 General
This subclause describes the items to be addressed in the owner’s specifications for the equipment to be qualified. These items include the equipment identification, the Class 1E performance characteristics, the input power supply, the environmental conditions, and the effect of changes in input power supply and environmental conditions upon the Class 1E performance characteristics. If the equipment specification includes margins, as defined in 3.1, their values shall be identified.
4.2 Class 1E performance characteristics and safety function
The nuclear power generating station owner or its representative shall specify the performance characteristics (including the safety function) of the equipment, including, as a minimum, numerical values and durations for normal, abnormal, DBE, and post-DBE conditions, as indicated in 4.2.1, 4.2.2, and 4.2.3.
Stressors shall be addressed in defining the performance characteristics and safety functions.
4.2.1 Class 1E performance characteristics
The following characteristics are suggested conditions, parameters, and performance requirements to be
considered in acceptance testing:
a) Input conditions, such as the following:
1) Voltage (consider voltage from islanding conditions and load rejection)
2) Frequency
3) Phase
4) Current (if limiting conditions exist for installed condition)
b) Output requirements, such as the following:
1) Voltage and voltage regulation
2) Current (minimum and maximum)
3) Current limit
4) Frequency and frequency regulation (inverters and UPS systems)
5) Load power factor (inverters and UPS systems)
6) Ripple voltage (battery chargers and UPS systems)
7) Harmonic distortion (inverters only)
8) Duration of power interruptions
9) Contact chatter limits for relays and contactors
c) Surge withstand capability
d) Reverse dc current flow prevention (chargers only and UPS) (optional feature; user to specify if this feature is required)
e) Characteristics of auxiliary equipment (if used), including the following:
1) Transfer switches (functional operation, e.g., transfer time, high- and low-voltage actuation,and overcurrent actuation)
2) Inverter’s input rectifier (same input conditions as battery charger)
3) Isolating device (blocking and conducting function). IEEE Std 384™ provides specific details related to isolation devices and qualification of isolation devices.
4) Alternate source transformer and regulator (input conditions and output requirements)
5) External annunciating relays (voltage, load)
f) Other performance characteristics as required by owner/purchaser specifications
4.2.2 Description of the safety function of Class 1E charger or inverter
The safety function(s) of the equipment (including required operating time) shall be specified for applicable service and DBE conditions expected during its qualified life.
4.2.3 Qualified life objective (where applicable)
The equipment qualified life objective shall be specified along with the set of service conditions under which successful performance must be demonstrated before, during, and after a DBE as applicable.
4.3 Environment
All significant environmental parameters shall be specified in the owner’s specification. The range of environmental conditions shall include, as a minimum, normal and abnormal conditions and durations, as well as DBE and post-DBE conditions.
Where applicable, the equipment specification shall include numerical values for the magnitude and duration of the following service conditions:
a) Minimum and maximum temperature, including profiles if available
b) Minimum and maximum storage temperature
c) Maximum relative humidity (operating and storage)
d) Altitude (static air pressure)
e) Operational vibration
f) Seismic requirements
g) Nuclear radiation type
h) Irradiation (dose rate and total dose)
i) Radio frequency interference (RFI) and/or electromagnetic interference (EMI) levels (i.e., the effects of the charger, inverter, or UPS systems on other equipment or vice versa) as defined in NRC Reg. Guide 1.180, Revision 1 [B19]. Regulatory Guide 1.180 recommends using MIL-STD-461E [B18] and IEC Std 61000-4-series to perform electromagnetic compatibility (EMC) testing.Information on EMI/RFI and surge voltages are also given in is given in IEC 62003 [B5], IEC 62040-2 [B6], EPRI 102323 [B3], and IEEE P2425 [B16].IEEE Std 650 pdf download.