Techsys is always happy to provide desktop or onsite support. Our highly qualified service technicians can be of assistance at any time or provide valuable system documentation.
Pump Control
Techsys Engineering designs and manufactures pump control systems for a wide range of applications in the water industry. Our product range has been carefully developed over the past decade to provide solutions for our clients’ needs. We are wholly Australian owned and operated and proud to be able to offer a unique service which allows the efficient management of water and pumping throughout Australia.
Techsys Engineering is a solutions engineering company specialising in the application of microprocessor based technology in the pump control fields. We offer a supportive relationship with our distributors, providing training and product support to ensure our products are operated to their full potential in the field.
Pump control systems come in two main varieties: Fixed Speed and Variable Speed.
- Fixed speed systems are only able to turn on or off one or more pumps, in response to demand. They maintain a pressure or level within an upper and lower limit. A good example of this is a tank filling system. When the tank is close to empty, the pump will start and fill the tank (from the dam) until the tank is full.
- Variable speed systems are able to control whether the pump is on or off, but also what speed the pump runs at, in response to demand. They can maintain a precise pressure or level. An example of this is a household pressure system where a constant pressure is important as fluctuating pressure is annoying when you have a shower. Fixed Speed Pump System configurations: DOL, or Soft Start
- DOL, or Direct On Line, systems start one or more pump directly from the electrical supply. This is only suitable for smaller pumps as it puts a large load on the electrical supply on start-up.
- Soft Start systems start one or more pumps via equipment that reduces the electrical load at start-up. Consequently, soft start systems are suitable for smaller and larger pumps. Soft start systems will increase the service life of the pump and motor set. Variable Speed Pump System configurations: All VFD, LLD, LLDA, LLS, LLSA.
- All VFD or “All Variable Frequency (speed) Drive– Each pump has its own VFD controlling it’s speed. As demand rises and falls, each pump has its speed regulated to accurately maintain either pressure or flow. There is built in redundancy and auto rotation means that the pump doing the “lion’s share” of the work is “rotated” across each of the pumps in the system over time.
- LLD, LLS- Lead Lag Direct Online, Lead Lag Soft Start. For LLD, the system has one VFD shared across the number of pumps in the system. When demand increases and the first pump increases to maximum, the next pump is switched on via DOL and the VFD pump drops down to minimum until load increases again. In the LLS version, a soft starter is used during the DOL activation of pumps to increase the life of the pump and motor set. Auto rotation is not available, so one pump and motor will tend to wear out more quickly, although such systems can be more economical than all VFD.
- LLDA, LLSA- Lead Lag Direct Online with Auto Rotation and Lead Lag Soft Start with Auto Rotation. LLDA works the same as LLD except that with auto rotation, the VFD control will switch between from one pump to the next so that the “lion’s share” of the work is “rotated” across each of the pumps in turn. LLSA is the same with the added benefit of soft starters on the pumps to increase the life of the pump and motor set.