The JTP-4140 is designed to replicate the load of the high-capacity server rack and allow testing of the electrical, liquid-cooling, and air-cooling infrastructure in data centre halls continuously, at a power factor of 1pu, prior to the installation of the server racks. It is intended to be operated indoors.
The load bank is nominally rated at either 400V 3P 50Hz 130kW or 415V 3P 50Hz 140kW but can operate at up to 450V to accommodate increased voltages during no load startup of data centre hall.
In remote mode the load can be selected as either 85% or 90% liquid / air ratio and then controlled by selecting the total load. The load consists of 120kW liquid and 20kW air.
The tanks and piping are corrosion resistant stainless steel, and the coolant system can be fully drained to prevent contamination between projects.
The electrical power connections are made with up to 8 x IEC60309 3P+N+E connectors. A minimum of 4 63A plugs should be used. Alternative types or numbers of connectors can be supplied on request.
A HMI screen can display the voltage, current, frequency and power of the load to an accuracy class of 0.5, and the flow rate, coolant pressure and inlet / outlet pressure differential, inlet and outlet coolant temperatures, and the coolant temperature rise. The water temperature accuracy is ±0.5 ℃.
The load bank consists of 3 x 40kW liquid-cooled modules and 2 x 10kW air-cooled modules that can be easily disconnected and replaced.
Built in remote operated flow control valves on each liquid module can be used to adjust the flow rate and the differential pressure.
Test data can be exported directly from the load bank to a USB disk.
The user can select the control mode as local or PC mode with selector switch on the local control panel. Only one mode can be active at a time.
In local mode the load bank is controlled manually by selecting the required load using the HMI and then pressing the master load switch. This allows the load to be changed with a single button press without intermediate steps.
Software is provided for installation of the customer's PC. The software allows the control of the load bank remotely via RS485 cable and USB adaptor, along with data logging and reporting.
The software allows to control methods, manual or automatic loading. In manual mode user selects the required load which is then set continuously. In automatic mode the user sets the power and time profile for full test cycle which is then run automatically.
Up to 50 load banks can be controlled and monitored either individually or as a single load group from the PC by connecting them in a daisy configuration with RS485 cables. Any abnormal operating condition is highlighted on the software control screen.
The software displays all of the measured values in 1s intervals as both absolute values and in graph form. Data is saved in the software and can be queried either during or after testing. Test data can be exported in a spreadsheet, and graphs can be exported as .jpg files.
The inlet and outlet liquid cooling connections are made with FD83" quick disconnect fittings with integrated isolation valves.
All pipping is corrosion resistant, solution annealed GR304 stainless steel, pick and passivated after welding to prevent contamination of the cooling liquid. All internal pipes are insulated. Hoses are peroxide cured EPDM. The resistor and piping can withstand a maximum operating pressure of 0.9MPa (9bar).
A manual air exhaust valve allows air to be bled from the system. A manual drain valve ensures that the cooling can be completely drained from the load bank to avoid contamination between projects.
The cooling liquid may be either:
The load bank can operate with cooling liquid temperatures from 0℃ to +80℃. At maximum load, the cooling liquid temperature rise will vary with the flow rate between 2℃ at 156L/m to 38℃ at 48L/m.
The pressure drop across the load bank will not exceed 100kPa (with the flow control valves fully open).
The air exhaust is directed to the same side as the local HMI screen, on the opposite side to the electrical and liquid cooling connections.
The IP20 enclosure is robust with a welded streel frame and steel panels. It is powder coated black. The enclosure is fitted with lockable castors and handles to allow it to be moved around.
The liquid cooling resistors are an immersion type, stainless steel cased, NiChrome alloy element with a low temperature coefficient.
The air-cooling resistors are U Shaped sheathed, finned, NiChrome alloy elements in a magnesium oxide powder that provides good thermal and insulation properties.
The change in resistance is limited to ±2%, therefore maintaining a constant load value across the operating profile. The manufacturing tolerance ensures all loads are within ±5% at rated voltage.
All elements undergo a PFWV test at 1.5kV 50Hz for 1 minute.
The load steps are switched with Schneier Electric contractors. The control circuit is protected by an MCB.
The control system utilises a highly reliable Siemens PLC to reduce the number of intermediate relays and timers required and simplify manufacture and maintenance.
An internal 240V 1 Phase 50Hz auxiliary supply for the control and protection systems is derived from the main power supply. A separate external supply is not required.
Protection consists of:
The following accessories are included with the load bank:
We use essential cookies to make our site work. With your consent, we may also use non-essential cookies to improve user experience and analyze website traffic. By clicking “Accept“, you agree to our website's cookie use as described in our Cookie Policy.