Siemens SINAMICS G130 - Page 464

SINAMICS S120 Cabinet Modules
Engineering Information
SINAMICS Engineering Manual – November 2015
Ó Siemens AG
464/528
- Coolant volumetric flow rate dV/dt:
- Active Line Connection Module IP55 / 690 V / 1700 kW / 1560 A / 100 % load
à dV/dt = 70 l/min according to Catalog D 21.3 (irrespective of the load)
- Motor Module IP55 / 690 V / 1000 kW / 1025 A / 85 % load
à dV/dt = 27 l/min according to Catalog D 21.3 (irrespective of the load)
- Motor Module IP55 / 690 V / 1000 kW / 1025 A / 85 % load
à dV/dt = 27 l/min according to Catalog D 21.3 (irrespective of the load)
- Power loss P
L
transferred to the coolant:
- Active Line Connection Module IP55 / 690 V / 1700 kW / 1560 A / 100 % load
à P
L
(100 %) = 1.0 x 39.2 kW = 39.2 kW acc. to Catalog D 21.3 and derating curve below
- Motor Module IP55 / 690 V / 1000 kW / 1025 A / 85 % load
à P
L
(85 %) = 0.85 x 11.2 kW = 9.5 kW acc. to Catalog D 21.3 and derating curve below
- Motor Module IP55 / 690 V / 1000 kW / 1025 A / 85 % load
à P
L
(85 %) = 0.85 x 11.2 kW = 9.5 kW acc. to Catalog D 21.3 and derating curve below
Active Line Connection Module Motor Module
4. Calculating the total volumetric flow rate and the total power loss in the deionized water circuit
The coolant volumetric flow rates dV/dt and the power losses P
L
transferred to the coolant of all S120 Cabinet
Modules are added:
- Total volumetric flow rate dV/dt
total
:
dV/dt
total
= (70 + 27 + 27) l/min = 124 l/min
- Total power loss P
L total
:
P
L total
= (39.2 + 9.5 + 9.5) kW = 58.2 kW
5. Selecting the Heat Exchanger Module
The Heat Exchanger Module is selected on the basis of the volumetric flow rate and the power loss.
- dV/dt
HEM deion rated
≥ dV/dt
total
à dV/dt
HEM deion rated
≥ 124 l/min
- P
HEM rated
≥ P
L total
à P
HEM rated
≥ 58.2 kW
The Heat Exchanger Module with the following data is therefore selected from Catalog D 21.3:
- Rated cooling capacity: 72 kW ≥ 58.2 kW
- Rated flow rate in deionized water circuit: 197 l/min ≥ 124 l/min
6. Calculating the required pressure difference between the inflow and return flow lines of the deionized
water circuit
The required pressure difference Δp between the inflow and return flow lines of the deionized water circuit depends
on the concentration of the anti-freeze. With the minimum ambient temperature of -5 °C specified for this example,
the minimum concentration is required. The required pressure difference setting is therefore
Δp ≥ 130 - 200 kPa (1.3 – 2.0 bar)
The required pressure difference Δp between the inflow and return flow lines of the deionized water circuit must be
adjusted during commissioning by means of the ball valve in the inflow line of the deionized water circuit in the Heat
Exchanger Module.