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Why It’s Good
The TechnaGuard modules offer customers a new means of protecting their expensive machinery at a low cost. By using the motor as a means of measurement, TechnaGuard has the versatility to be applied to almost any application with an AC motor.
What TechnaGuard can do for you:
- The compact size, low cost, and digital technology of TechnaGuard give it a distinct advantage over other means of machinery protection.
- With simplicity in the design, TechnaGuard is a simple plug and protect product.
- TechnaGuard has the ruggedness to be exposed to the harsh plant environments.
- As machinery and/or motors wear energy consumption increases. As energy costs rise, the TechnaGuard becomes an efficient and inexpensive way to keep these costs in check.
APPLICATIONS
For the protection and control of…
Pumps
Running Dry / Cavitating
When a pump is running dry, or without fluid, the motor is using less power due to the lack of back force from the fluid. Under these conditions, the TechnaGuard detects this difference and triggers an alarm shutting down the motor and protecting the pump.
Overload (blocking) protection
When a pump has an excess of pressure, or a block in the pump, the motor will use more power than if operating properly. The TechnaGuard can detect this difference and trigger an overload alarm, shutting down the motor.
Best TechnaGuard Application:
TG110 or TG220
Conveyors
Jam Protection
When a conveyor system becomes jammed, the motor will draw more power than in normal operating conditions. This triggers an alarm on the TechnaGuard, shutting down the conveyor system, preventing any damage and minimizing down time.
Best TechnaGuard Application:
TG110 or
TG220
Hoist and Cranes
Overload Protection
If the weight limit is ever exceeded while lifting an object with a hoist or crane, the motor will draw more power than in normal operating conditions. This will trigger an overload alarm on the TechnaGuard, shutting down the hoist or crane, therefore protecting the operator and equipment.
Best TechnaGuard Application:
TG110
Fans
Running/not running
TechnaGuard can simply be set up to trigger an alarm, or signal, whether an application is running or not.
Loss of transmission
If a fan system ever lost its transmission (belt, chain, etc.), the motor would have no opposing forces and will use less power, thereby triggering an alarm on the TechnaGuard shutting down the system.
Best TechnaGuard Application:
TG110,
TG220, or TG226
Mechanical Transmission Systems
Belt/Chain Breakage
In the occurrence of a belt or chain breaking on a mechanical transmission system, the motor would experience a lower power draw, triggering an alarm on the TechnaGuard and stopping the system.
Transmission Binding
If a gear, belt, or chain ever binds while in motion, or encounters a foreign object, the motor will experience a sharp peak in power. TechnaGuard will monitor this surge and send an overload alarm to the controls shutting down the stand.
Bad Bearings
As bearings wear out with time the power draw on the motor steadily increases due to friction. When the power draw on the motor reaches the point set on the TechnaGuard an alarm will be triggered shutting down the system.
Best TechnaGuard Application:
TG110, TG130 or
TG220
Energy Consumption
TechnaGuard can be used to monitor the energy consumption of an application under optimal conditions, and detect and alert when those conditions are surpassed. Such conditions can be inadequate lube, or even the passage of time; which results in higher energy costs to run the machine.
Best TechnaGuard Application:
TG130
Electronic Shear Pin
Shockload Protection
To protect a system from any unusual occurrences that would cause great strain on the motor, the TechnaGuard can act as an electrical shear pin triggering an overload alarm and shutting down the system.
Best TechnaGuard Application:
TG130
Power-Measurement Transducer for PLC-Interface
TechnaGuard offers the following features that give it a distinct advantage over the traditional transducer:
- 4-20 mA Analog Output
- Output can be inverted for regulation purpose
- Analog Zoom
- Uses:
- Mixers (Viscosity Control)
- Ice Cream Machines (Viscosity control) - freezing speed / quality control
Best TechnaGuard
Application: TG100
Expect more from your motor.
Protect your expensive machinery; do this easily and inexpensively; do it with TechnaGuard!
How It Works
The TechnaGuard family of Load Control Modules was designed to protect machinery driven by 3-phase AC-motors. The TechnaGuard modules monitor the power consumption of the AC motor and prevent damage to the machinery when driven against a mechanical failure. Selectable limits allow the user to control the outputs according to the type of application. Several applications for the TechnaGuard include: pumps, fans, conveyors, hoists, mixers, and mechanical drives. Please note the purpose is not to protect the motor itself but use it as a sensor to protect the machinery it is driving.
Benefits & Features
- True Digital Design
- Push Button control: No pots, dials, or screw drivers
- Ultra Compact DIN Rail Mount
- Occupies only 1" of rail space in the electrical panel (25.4 mm)
- "Intelligent CT"
- Current wire fed through module rather than an external CT.
- Monitors any size AC Motor:
- Voltage ranges from 220 to 575 volts, three phase.
- Peaks up to 75 amps measured (external CT >25 amps).
- Measures and Displays:
- kW, kW(%), RMS Voltage, Current, and PF (power factor).
- Controls are based on kW (optional HP).
- Peak and minimum readings are captured for all values:
- Limits Programmed in kW(%) or true kW (optional HP)
True Power Equation
The TechnaGuard family of modules is designed around the concept that true power is directly proportional to the load applied to the motor by the machine. This concept is realized by the equation:
P = √3 x U x I x Cosø
Monitoring motor load through current measurement creates a nonlinear relationship, and therefore is a poor means of monitoring loads at all points. By measuring the true power of the motor a linear relationship can be established and an accurate measurement can be made with any load on the motor. These graphs illustrate these points:
As seen by the graphs, measuring the true power of the motor allows the load to be monitored accurately with its linear relationship to power. Also, since all motors behave differently under load, this linear relationship is crucial to ensure accurate measurements for a wide variety of applications.
To illustrate how the TechnaGuard works, the module monitors the load on the motor, and the user inputs the maximum and minimum power that the motor should draw determined by the application. The graph below helps illustrate this process:
Varying Load Graph
The graph depicts a motor that undergoes a varying load: a start-up surge of power, and then some variation simulating a changing load. The TechnaGuard has a delay timer to compensate for the high power draw upon starting a motor, and doesn't "monitor" until that set time delay (Ts) has expired. The two dark bands show the user inputs with a hysteresis setting to allow for some tolerance. If the power drawn by the motor ever goes above or below the hysteresis bands for a set period of time(Tr), the TechnaGuard sends a signal to shut-down the machine (Waveforms will be different for each model of the TechnaGuard line). The TechnaGuard family of modules has a variety of features to match specific application for all monitoring needs.
Programming
All units are operated and programmed by four keys integrated into the front panel: UP, DOWN, MODE, and RESET. Eight LEDs are used to indicate the selected variable and a 3-digit digital display is used to show its current value. When display mode is selected it is possible to select between kW, kW[%], U[V], I[A], and PF (Power Factor). The first two modes are maintained by the unit and if kW[%] is selected the limits are programmed in kW[%] (Output in HP is also available as an option). If, however, true power is selected then the limits are programmed in kW.
The remaining variables U, I, and PF are only shown for approximately eight seconds, after which the display returns to the previous selected power display mode. Max. /Min. peaks for all variables are registered and may be shown by activating the arrow up/down key, when the variable is displayed. Further set-up is covered in the specifications sheet.
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