Siemens SINAMICS PERFECT HARMONY GH180 - Cooling System Section; Application of Voltage; Blowers and Speed Settings

4.1.6 Cooling System Section
Cooling System Components
The cooling system consists of several parts including blower(s). Each blower has a suitably
rated three-phase combination starter (circuit breaker & contactor combination). There is an
optional line reactor that is connected upstream to the combination starter in the circuit that
feeds an EMI 󹪝lter.
Cooling System Function
The cooling system functions as follows:
• The line reactor connects to a combination starter (circuit breaker & contactor combination).
The contactor is controlled through the SOP of the NXG controller.
• The output of the combination starter (circuit breaker & contactor combination) connects to
quick disconnect plugs which connect individual blowers to the power source.
• The default SOP logic is con󹪝gured to operate the blower immediately when control power
is energized.
• If the blower (or blowers) fails or loses power, the SOP logic controller issues a drive trip. This
fault condition must be manually reset.
4.1.6.1 Application of Voltage
Control power must always be applied prior to application of medium voltage.
4.1.6.2 Blowers and Speed Settings
Blowers
All SINAMICS Perfect Harmony™ GH180 air-cooled drives are force air-cooled.
An extremely important part of the installation process is making provisions for exhausting the
heat that is generated by the operation of the drive. Although the drive is highly e󹪟cient, there
may be as much as a 4.0 % energy loss emitted in the form of heat from inside the system
cabinet. This heat must be transmitted to the outdoor air or into the structure of the building at
a rate fast enough to prevent the ambient temperature from rising above the rated conditions.
Note
Air Inlet Cooling
The customer is responsible to ensure proper cooling is provided at the inlet of each drive.
If redundant blowers are provided, a cover plate is removed from the top of the enclosure and
a redundant blower cage assembly is installed. Dampers are installed at the front of the
redundant blower cage to prevent reverse air 󹪞ow. The dampers are opened and closed based on
di󹪜erential air pressure. The blower assembly design consists of a steel frame or cage with mesh
Description
4.1 Cabinet Details
Type 6SR5 Air-Cooled
Operating Instructions, AK, A5E39390112 27