For use with low and medium voltage wound rotor motors from 200 kW to 12,400 kW, maximum rotor volts = 3500 V. Designed & manufactured in Australia by NHP.
Overview
The HLR starter consists of a stainless steel tank containing the electrolyte and electrode assemblies, control cubicles which house the shorting contactor and ancillary control equipment, mounted on and within a galvanized steel frame (no frame for HLR700 and HLR1100 models).
Electrode movement is provided by a gear motor and belt drive. A clutch arrangement is used to connect the moving electrode carriage to the belt drive. This prevents damage should the carriage be driven into the end stops, it also eliminates the need for over travel limit switches.
Through the geared motor and belt drive assembly, the variable speed drive controls the rate at which the electrodes move, and in turn, the starting time of the motor. The electrodes move through a horizontal plain to provide a near linear resistance/travel characteristic. The turn down ratio (ratio of initial to final resistance) is typically 200:1 thereby providing smooth starting and an extremely low torque surge on energisation of the rotor shorting contactor. The horizontal movement of the electrodes also acts to agitate the electrolyte thereby eliminating the need for a circulation pump for most ‘standard’ duty applications.
Dual and triple units can be provided for applications with multiple motors driving the same load. Load sharing, or trimming resistors as they are otherwise known, can be added to match the speed and current drawn by motors that are individually controlled but driving the same load, for example head end drives on a conveyor system.
Maintenance primarily consists of topping up the electrolyte with potable water, greasing the electrode carriage guide rail bearings and ensuring all connections are tight, annually or as otherwise required.
| Input signals | Dry contact input |
| - Start/Run | - 1 x normally open input (close to start/run, open to stop) |
| Output signals | Voltage free contact |
| Ready to start | 1 x Normally open |
| Shorting (Run) contactor closed | 1 x Normally open |
| Electrolyte level (Low) | 1 x Normally open |
| Electrolyte temperature (High) | 1 x Normally open |
| Starter fault | 1 x Normally open |
| Indication | |
| Start | |
| Run | |
| Fault | |
| Electrolyte level low | |
| Electrolyte temp high | |
| Metering | |
| Rotor current | 1 x analogue meter (displays initial start current only to check electrolyte/resistance) |
| Electrolyte temperature | 1 x tank mounted dial gauge |
HLR starters are designed to meet the starting torque requirements of the application and the starting duty (starting time and starts per hour) specified by the user. The ratings given to HLR starters are therefore variable and application dependant.
| Starter Model | Nominal motor kW rating at starting torque of; | |||
| Single motor drives | 0.7 x FLT | 1.0 x FLT | 1.4 x FLT | 2.0 x FLT |
| HLR700 | 1400 | 1000 | 700 | 500 |
| HLR1100 | 1600 | 1100 | 790 | 550 |
| HLR1400 | 2600 | 1800 | 1300 | 900 |
| HLR2300 | 4200 | 3000 | 2100 | 1500 |
| HLR4000 | 6200 | 4500 | 3100 | 2200 |
| HLR4000/2 | 12400 | 9000 | 6200 | 4400 |
| Dual & Triple motor drives | ||||
| HLR700 Dual Compact | 2 x 1000 | 2 x 700 | 2 x 500 | 2 x 360 |
| HLR2000 Dual Compact | 2 x 4200 | 2 x 3000 | 2 x 2100 | 2 x 1500 |
| HLR4000 Dual | 2 x 6200 | 2 x 4500 | 2 x 3100 | 2 x 2200 |
| HLR4000/2 Dual | 2 x 12400 | 2 x 9000 | 2 x 6200 | 2 x 4400 |
| HLR1300 Triple Compact | 2 x 2000 | 2 x 1500 | 2 x 1000 | 2 x 700 |
Notes:
- Nominal ratings only, based on 4 consecutive starts followed by 2 starts per hour from hot. One start per hour from hot for HLR4000 models.
- Actual ratings will depend on start torque and run-up time required
- For higher starts per hour or for extended run-up times, a heat exchanger may be added.
- Electrode movement and run-up time controlled by inbuilt variable speed drive.
- FLT = Full Load Torque otherwise referred to as Motor Rated Torque
- Control of larger motors is possible. Contact NHP for selection assistance and advice.
