|A member of the TG100/200 family of Programmable Digital Load Monitors for machinery monitoring, supervision and control.
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the TG130 Load Monitor.
TG130 measures motor power, kW, RMS voltage, RMS current and Power Factor:
- Max. kW limit — overload alarm
- +dp/dt — shockeload alarm
- Single universal alarm relay
- Start/nuisance trip delay timers
- Remote Reset and Alarm Blocking
True Digital Design
- no pots, no dials, no screw-drivers.
- 144 samples per cycle at 50 Hz.
- 120 samples per cycle at 60 Hz.
- 4 quadrant digital multiplication.
Ultra Compact DIN Rail Mount
only 1" of rail space.
Current Wire Feeds Through Hole in Unit
Monitor Any Size Motor
(external CT >25Amp.)
peaks up to 75 Amp measured.
High Precision Resolution Measurement
works when amp-meters don’t!
Measures and Displays
kW, kW[%], RMS Voltage, RMS Current and PF(Power Factor)
Peak/Min Capture For All Variables
for accurate limit setting—no guessing.
Limits Programmed in kW[%] or Ture kW
The TG130 is designed for applications where overload supervision is required under varying load. High ratio gear drives typically have a high idle load when cold and can be difficult to protect with overload detection. The +dP/dt detector for rate of power increase-shockload-provides effective secondary supervision since sudden changes in power are typically mechanical in nature. Bulk solids conveying is also a good example where +dP/dt is useful since running load can vary dramatically.
- Pumps: Dry-running/cavity protection for centrifugal pumps and control/prevention of over-pressure and by-pass flow for positive displacement pumps.
- Fans and Filters: Supervision of blockage and detection of "not-running" conditions.
- Conveyors and Belts: Jam detection and electronic shear-pin function, plus effective broken belt detection
The drawing shows a typical AC-motor power curve (ex. conveyor). The start timer Ts filters out from the regulation the large power surge generated on startup; when Ts expires, limits, Tr etc. becomes active. When power exceeds the Max. Limit, Tr1 becomes active and when Tr1 expires a max. alarm is generated (Relay 1 switched). If power drops back below the Max. Limit before an alarm is generated, Tr1 is cancelled.
A sudden rapid power change at the end of the cycle shown effectively brings the machine to halt condition. Human intervention and inspection may often be required here.
Note: With only a single SPDT relay, it is not possible to differentiate between max. and dP/dt alarms. The TG230 provides similar function, with dual SPNC relays, at minimal cost increase.