Block Making Machine Voltage and Power Supply in Syria: 380 V, 50 Hz and Cuts

Block making machine voltage and power supply in Syria is a site question before it is a machine question, because every unit leaves our works wound for 380 V and 50 Hz and the site decides whether that nameplate can actually run. A QT4-15 draws 22.9 kW. A QST1800 draws 104 kW. The gap between those two numbers is not only output; it is also how much supply, cable and protection a plant must carry before the first pallet moves.

This page is the audit we ask every buyer to complete: the capacity of the incoming supply, the list of machines that run at the same time, the motor with the largest starting current, cable cross section against voltage drop, earthing quality and phase sequence. Answer those six and the electrical package stops being a guess.

1. The power audit comes before the machine order

The audit has six lines, and every line moves the quotation. First: what is the capacity of the incoming supply in kVA, and how much of it is already loaded by other consumers on the same transformer. Second: which machines run at the same time, because the mixer, the moulding machine, the palletising system and the compressor rarely stop together, yet they draw together. Third: which single motor has the largest starting current, since that motor sets the size of the supply, not the sum of the list.

Then the cable. Run length and conductor cross section set voltage drop, and a long undersized run hurts more at the motor terminals than a thin supply hurts at the meter. Last come earthing and phase sequence: an earth electrode with a measured resistance, and a rotation check on all three phases before the panel is energised. All six lines sit on the form we send before we quote any electrical package.

2. Our machines are built for 380 V and 50 Hz

Every machine we ship is manufactured for 380 V, 50 Hz. That is our side of the contract, and it travels on the nameplate next to the installed power: QT4-15 at 22.9 kW, QT5-15 at 37.4 kW, QST8-15 at 44.9 kW, QST1200 at 57.6 kW, QST1500 at 69.1 kW and QST1800 at 104 kW. The hydraulic presses are heavier, with QS600 at 46.9 kW, QS1000 at 66.4 kW and the two-way QS1500 at 108.2 kW. Our strapping machine is 3.1 kW and also 380 V, 50 Hz.

What we cannot read from the workshop is your site. So we ask. What is the actual voltage at your panel, measured during a working shift rather than at dawn? What is the frequency, and does it hold when the mixer and the compressor start together? Is the supply three-phase plus neutral, or three-phase with an earth only? What is the incoming capacity in kVA, what is the conductor cross section from the transformer to your panel, and what is the distance? Send those numbers and the electrical design becomes a fact instead of a guess.

3. Which process can stop, and which one cannot

When the supply drops or a load limit is imposed, the line cannot be treated as one block. Moulding is the most forgiving stage: a vibration cycle runs 15 to 25 seconds, so stopping between two cycles costs one pallet and one restart, and the mould stays closed. A QT4-15 comes back in seconds because its drives total 22.9 kW, while a 104 kW line needs longer, and each restart asks for starting current again.

Mixing and curing get the opposite treatment. A mixer stopped under full load sets concrete inside the drum, and the cleaning afterwards is counted in hours, not minutes. Curing is a clock, not a switch: the 7-day and 28-day strength nodes are fixed by hydration, and a yard that loses wet curing for a day never gets that day back. Protect the mixer and the curing yard first, and let the moulding machine wait.

4. Sizing standby generation: the method, not a number

We do not hand out a generator size, because the answer depends on your line, your starting sequence and your process priority. The method has three steps. Step one: add the installed power of the machines that will run together, including the palletising system at 15 to 44.5 kW and the mixer at 25.5 to 75 kW. Step two: add a starting margin for the largest motor, because a motor draws several times its rated current while it accelerates, and the generator has to carry that moment.

Step three: add 15 to 20 percent on the running total, as reserve for voltage drop, ageing windings and equipment added later. Then run the sum twice, once for the full line and once for a reduced set that keeps the mixer and the curing yard alive through a long cut. The second figure is usually the one that decides what you buy. Send us the loading list and we work through both cases with you.

5. Protection: undervoltage, phase loss, oil heat and overload

A generator or an unstable supply does not fail politely. The voltage sags, one phase disappears, the frequency slides. Undervoltage and phase-loss protection belong in the panel, ahead of the machine, so the contactors drop out before the motors cook. Phase loss is the dangerous case: a three-phase motor that loses one leg keeps turning on two, draws heavy current through the remaining windings, and fails with no warning at all.

On the machine itself, the hydraulic unit needs oil temperature monitoring, because viscosity follows heat and a cold start is not the same load as a hot afternoon. Motor overload relays are set at the nameplate current, not at a round number, and the setting is recorded. The phase rotation check on installation day is not paperwork either: reversed rotation on a vibration or conveyor motor does its damage inside the first cycle.

6. Four electrical items to confirm before shipment

We ask for four confirmations with the order, because each one changes a component and a wire size, and both are cheaper to settle in the factory than on site.

• Site voltage and frequency, measured at the panel under normal working load.
• Supply type and capacity: three-phase plus neutral or not, and the incoming capacity in kVA.
• Cable run from the supply point to the machine panel, with distance and conductor cross section.
• Standby plan: main supply only, or a generator, and the machine list that must keep running.

Tell us your site voltage, frequency, incoming capacity and standby arrangement. We size the electrical package to those working conditions, then quote the machine together with the electrical list that fits it.