UPS power installation process and precautions
1) UPS requirements for operating environment
The UPS is best installed in a separate room with no conductive impurities and air conditioning, and the operating environment must be clean, dry and protected. The air must be free of dust and corrosive gases. Air circulation must also be maintained when the system is running, and the installation environment must meet a series of conditions:
Operating relative humidity: 0~95%, no condensation
Operating temperature: within the range of 0~40℃
2) Unpack and install the cabinet
Check for damage
Check the packaging to see if there is any damage or wrong installation, if so, you should contact the supplier in time.
3) Unscrew the screws at the top and bottom of the side panel of the package, and remove the side panel;
4) Check whether the model on the front door matches the model ordered;
5) Record model data for future use.
Movement of the cabinet
6) Plan the path — All aisles should be able to pass through cabinets and manual/electric forklifts, and the floor should have sufficient load-bearing capacity. Corridors, elevators, ramps, etc. should be carefully inspected for impassable dead ends, stairs or obstacles.
7) Final Check—Check if there is anything else in the cabinet.
clean up the scene
8) Packing materials – take the packing materials from the site and save them in case the parts are returned to the factory for use;
9) Final Check—Check if there is anything else in the cabinet.
10) Fabrication and installation of UPS and battery cabinet brackets
For UPS equipment installed in a computer room with a raised floor, corresponding brackets should also be made according to the height of the raised floor and the dimensions of the UPS and battery cabinets. The following matters should be paid attention to when making the brackets:
According to the weight of the cabinet, the support column is made of channel steel of corresponding specifications, and the other corners are made of 50×50 angle steel. The four supporting feet of the column are made of 100x100x10 steel plates (the specific area depends on the load-bearing of the floor) to reduce the load-bearing pressure per unit area;
After the bracket is processed, the anti-rust paint should be brushed twice to dry;
After the bracket is processed, it is sent to the site for installation. During installation, the upper plane of the bracket should be at the same height as the raised floor, and there should be no skew;
After the bracket is fixed, place the UPS and battery cabinet on the bracket, and use a spirit level to correct the level.
Input wiring: The input cable should preferably be equipped with a flexible metal sheath of suitable size. In order to reduce the interference caused by other loads, it is best to connect the utility power directly from the dedicated power supply. The input line must be able to withstand the full load. Input cables enter from the lower or rear of the UPS, and leave a 1-meter long section for wiring.
Output wiring: The UPS output power is delivered to the load equipment through the output cables connected to the output terminals in the cabinet. The output cable should preferably be equipped with a flexible metal sheath of suitable size.
Battery connection: Connect the battery cables one by one in the order of the positive and negative poles of the battery, and connect the positive and negative cables to the UPS host. After the battery connection is completed, the battery pack should be covered with an insulating cover to avoid short-circuit discharge caused by falling metal objects.
The specifications and models of the rectifier device, inverter device and static switch device of the uninterruptible power supply meet the design requirements. The internal wiring connection is correct, the fasteners are complete, reliable and not loose, and the welding connection does not fall off.
The input and output protection systems at all levels of the uninterruptible power supply and the output voltage stability, waveform distortion coefficient, frequency, phase, static switch action and other technical performance indicators test adjustments must meet the requirements of product technical documents and design documents. .
The rectifier, inverter and static switch functional units of the uninterruptible power supply must be individually tested and qualified before the entire uninterruptible power supply test can be carried out. This kind of test can be carried out in the factory or at the installation site according to the supply agreement, and the best choice is to install the current test, because unless there is special instructions, the test at the manufacturer generally uses a resistive load. No matter which method is adopted, it must meet the requirements of engineering design documents and product technical conditions.
The insulation resistance between the wires and the wires to the ground should be greater than 0.5 MΩ.
The neutral line (N pole) of the output end of the uninterruptible power supply must be connected with the grounding trunk line directly drawn from the grounding device for repeated grounding. The neutral line (N pole) of the output end of the uninterruptible power supply is introduced into the main line through the grounding device for repeated grounding, which is beneficial to curb the drift of the center point and improve the three-phase voltage balance. At the same time, when the neutral wire leading to the power supply side of the uninterruptible power supply is accidentally disconnected, it can ensure that the output end of the uninterruptible power supply will not cause voltage rise and damage the important electrical equipment powered by it, so as to ensure the safety of the whole building. Safe to use.
The rack assembly where the uninterruptible power supply is placed should be horizontal and vertical, the allowable deviation of horizontality and verticality should not be greater than 1.5‰, and the fasteners are complete.
The main circuit wires, cables and control wires and cables leading into or out of the uninterruptible power supply device should be laid through protective pipes respectively, and a distance of 150mm should be maintained for parallel laying on the cable support; The nearest connection, the fasteners are complete.
The accessible bare conductors of the uninterruptible power supply device should be grounded (PE) or connected to zero (PEN) reliably and marked.
The handover test items of low-voltage electrical appliances installed separately on site shall meet the requirements in the following table.
|Low-voltage electrical appliance handover test|
|Test content||Test standard or condition|
|1||Insulation resistance||Shake test with a 500V megohmmeter, the insulation resistance value is greater than or equal to ≥1 MΩ; in humid places, the insulation resistance value is greater than or equal to ≥0.5 MΩ|
|2||Low voltage electrical operation||Unless otherwise specified by the product, the voltage, hydraulic pressure or air pressure can operate reliably within the range of 85%-110% of the rated value|
|3||The setting value of the trip unit||The error of setting value shall not exceed the provisions of product technical conditions|