# Calculating PTX3000 Power Consumption

## Power Requirements for PTX3000 Components

Table 1 lists the output power requirements for the required and optional FRUs for the PTX3000. The power requirements vary depending on the ambient air temperature for your installation.

Component |
Typical Output Power Requirement |
Maximum Output Power Requirement |
---|---|---|

Base system with SIB-SFF-PTX-240 SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB-SFF-PTX-240 SIBs) |
730 W |
1555 W |

Base system with SIB3-SFF-PTX SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB3-SFF-PTX SIBs) |
826 W |
1600 W |

Base system with SIB3-SFF-PTX SIBs (2 fan trays + 1 craft interface + 1 host subsystem + 9 SIB3-SFF-PTX SIBs) |
826 W |
1600 W |

Base System Components |
||

Fan tray |
120 W (typical speed) |
450 W (higher speed) |

Craft interface |
4.8 W |
4.8 W |

Host subsystem (Control Board and Routing Engine) |
95 W |
110 W |

SIB-SFF-PTX-240 |
43.3 W |
60 W |

SIB3-SFF-PTX |
54 W |
65 W |

SIB3-SFF-PTX |
54 W |
65 W |

FPCs |
||

FPC-SFF-PTX-P1-A |
200 W |
270 W |

FPC-SFF-PTX-T |
200 W |
270 W |

FPC3-SFF-PTX |
250 W |
300 W |

PICs |
||

P1-PTX-24-10GE-SFPP |
60 W |
70 W |

P1-PTX-24-10G-W-SFPP |
82 W |
115 W |

P1-PTX-2-40GE-CFP |
27 W |
35 W |

P3-24-U-QSFP28 |
110 W |
167 W |

P1-PTX-2-100GE-CFP |
70 W |
75 W |

P1-PTX-2-100G-WDM |
250 W |
280 W |

IPLCs |
||

PTX-IPLC-B-32 |
50 W |
75 W |

PTX-IPLC-E-32 |
1 W |
3 W |

## Calculating Power Consumption for your Configuration

By using the information in Table 1, you can calculate the power consumption for your configuration.

PTX3000 AC and DC power supply module (PSM) efficiency is approximately 90% at full load and nominal voltage. The power supply efficiency is used to calculate the input power in the calculations below.

In the examples below, a base system is defined as described in Table 1.

Example of calculating

*typical*power consumption for a*minimum*configuration using an FPC-SFF-PTX-P1-A FPC and SIB-SFF-PTX-240 SIBs:Base system with SIB-SFF-PTX-240 SIBs + 1 FPC-SFF-PTX-P1-A FPC + 1 P1-PTX-24-10G-W-SFPP PIC = output power in watts 730 W + 200 W + 82 W = 1012 W Output power in watts / power supply efficiency = input power consumption in watts 1012 W / 0.9 = 1125 W

Example of calculating

*typical*power consumption for a*maximum*configuration using FPC-SFF-PTX-P1-A FPCs and SIB-SFF-PTX-240 SIBs:Base system with SIB-SFF-PTX-240 SIBs + 1 host subsystem + 8 FPC-SFF-PTX-P1-A FPCs + 8 P1-PTX-24-10G-W-SFPP PICs = output power in watts 730 W + 95 W + 8(200 W) + 8(82 W) = 730 W + 95 W + 1600 W + 656 W = 3081 W Output power in watts / power supply efficiency = input power consumption in watts 3081 W / 0.9 = 3424 W

Example of calculating

*maximum*power consumption for a*maximum*configuration using FPC-SFF-PTX-P1-A FPCs and SIB-SFF-PTX-240 SIBs:Base system with SIB-SFF-PTX-240 SIBs + 1 host subsystem + 8 FPC-SFF-PTX-P1-A FPCs + 8 P1-PTX-24-10G-W-SFPP PICs = output power in watts 1555 W + 110 W + 8(270 W) + 8(115 W) = 1555 W + 110 W + 2160 W + 920 W = 4745 W Output power in watts / power supply efficiency = input power consumption in watts 4745 W / 0.9 = 5273 W

Example of calculating

*typical*power consumption for a*minimum*configuration using an FPC3-SFF-PTX FPC and SIB3-SFF-PTX SIBs:Base system with SIB3-SFF-PTX SIBs + 1 FPC3-SFF-PTX FPC + 1 P3-24-U-QSFP28 PIC = output power in watts 826 W + 250 W + 110 W = 1186 W Output power in watts / power supply efficiency = input power consumption in watts 1186 W / 0.9 = 1318 W

Example of calculating

*typical*power consumption for a*maximum*configuration using FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs:Base system with SIB3-SFF-PTX SIBs + 1 host subsystem + 8 FPC3-SFF-PTX FPCs + 8 P3-24-U-QSFP28 PICs = output power in watts 826 W + 95 W + 8(250 W) + 8(110 W) = 826 W + 95 W + 2000 W + 880 W = 3801 W Output power in watts / power supply efficiency = input power consumption in watts 3801 W / 0.9 = 4223 W

Example of calculating

*maximum*power consumption for a*maximum*configuration using FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs:Base system with SIB3-SFF-PTX SIBs + 1 host subsystem + 8 FPC3-SFF-PTX FPCs + 8 P3-24-U-QSFP28 PICs = output power in watts 1600 W + 110 W + 8(300 W) + 8(167 W) = 1600 W + 110 W + 2400 W + 1336 W = 5446 W Output power in watts / power supply efficiency = input power consumption in watts 5446 W / 0.9 = 6051 W

## Calculating System Thermal Output

After you have calculated the power consumption for your configuration, you can use that information to determine the system thermal output (BTUs per hour). To do so, multiply the power consumption in watts by 3.41.

For example, above we calculated the power consumption for a redundant base configuration with FPC3-SFF-PTX FPCs and SIB3-SFF-PTX SIBs to be 6051 W. Using that information we can calculate the system thermal output for the configuration:

Power consumption in watts * 3.41 = system thermal output in BTU/hr 6051 W * 3.41 = 20,634 BTU/hr