RLV vapormatic starters are used when the driven machines are of great inertia or when the rating power of starting / driven machine is low. They have the following advantages
Reliability
- No moving parts other than the short circuit contactor
- Unaffected by damp, dusty or corrosive atmospheres
Savings
- Cable saving: integral contactors
- Facilitate installation beside motors
- Electrical and mechanical maintenance considerably reduced
- Competitive price
Adaptability
- Easy adjustment gives "made to measure" starting conditions and conversion to suit different drives.
Operating principle
The starting principle is based on the difference in resistivity between a liquid electrolyte and its vapour, contained in an electrode chamber.
The passage of the initial rotor current causes immediate partial vaporisation of the electrolyte and instantaneously adjusts resistance and starting torque to optimum values. During the run-up to speed, the thermal interchanges which occur progressively decrease the resistance.
A timed contactor then short circuits the low residual resistance.
The starting torque is determined according to the requirements of the driven machine or the current limitation.
Electrical features:
| Reference | Protection | Tank | Number of electrode assemblies | Rating | Short circuit contactor (choice) |
| M15 | IP63 | 15 l | 1 | 30 kW (40 ch.) max | 140 A 175 A |
| M35/1 | IP63 | 35 l | 1 | 30 kW (40 ch.) max | |
| M35/2 | IP63 | 35 l | 2 | 30 to 60 kW (40 to 80 ch.) max | 110 A 175 A 380 A |
| M35/3 | IP63 | 35 l | 3 | 30 to 90 kW (80 to 125 ch.) max | |
| M35/4 | IP63 | 35 l | 4 | 90 to 120 kW (125 to 160 ch.) max | |
| M70/4 | IP63 | 70 l | 4 | 90 to 120 kW (125 to 160 ch.) max | 140 A 175 A 280 A 420 A 630 A 700 A |
| M70/6 | IP63 | 70 l | 6 | 120 to 200 kW (160 to 270 ch.) max | |
| M350/2A | IP54 | 350 l | 2 | 200 to 300 kW (270 to 400 ch.) max | 1300 A |
| M350/2B | IP54 | 350 l | 2 | 300 to 440 kW (400 to 600 ch.) max | |
| M350/3 | IP54 | 350 l | 3 | 440 to 750 kW (600 to 1000 ch.) max |
Rotor voltage between slip rings:
– M15 / M35 / M70: 750 V
– M350: 1500 V
Further features
| Electrolyte | Composition : In powder or crystal form for mixing with drinking water and anti-evaporation oil Electrolyte temperature is controlled by thermostat: – M15 / M35 / M70: 10 A / 220 V, 8 A / 380 V or 5 A / 500 V – M350: 9 A / 380 V Electrolyte level: – M15 / M35 / M70: By filler pipe – M350: By magnetically operated float switch (250 V – 60 VA) in each compartment |
| Electrode assembly | The RLV “triphase” electrode assembly is a standard component. The value of resistance is factory preset according to the data of the driven machine given by the customer at the order. It is always possible for him to make adjustments on site, either for a change of drive of for a different duty. This is easily carried out by changing the electrolyte and/or the size of the electrode chamber. |
| Rotor starter protection system | On request we can supply your starter with an electronic module type DRS. This module allows the following: – locked rotor detection of your motor – optimisation of the starting time by measuring the true speed of the motor – temperature monitoring of the electrolyte – limitation of the number of starts per hour Any anomaly in the starting sequence is detected by a fault relay which can be connected to your control panel. |
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