RED

picto fleche Electrolytic starters for low and medium power cage synchronous motors

RED statormatic electrolytic starters for cage motors offer an unrivalled starting capability up to 750 kW.

  • Reliable: no moving parts, no current peak during starting process
  • Economical: reduced maintenance
  • Customizable to specific motor requirements
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RED statormatic starters offer an unrivalled starting capability and have the following advantages:

Reliability

  • They do not have any moving parts other than the short circuit contactor
  • There is no current peak at the end of the starting period

Economy

  • Electrical and mechanical maintenance considerably reduced
  • Units pre-wired

Adaptability

  • The starting characteristics are "made to measure" and can be altered for a change of motor or machine by simply replacing the electrolyte.

Description

The starters of this range can be supplied in three formats: RC, RW or RZ. They are made up of two parts:

  • The electrolytic starting resistance in a frame with tanks and a thermostat.
  • The equipment:
    • An enclosure integrated into the frame which contains a short circuit contactor, a timing relay, eventually a line contactor or further option. The RC and RW units are supplied in this format.
    • A separate WS wall mounting enclosure can be used with RZ frames. The RZ/WS modular assemblies are prewired.

Operating principle

The decrease in resistance of an electrolyte when heated is used inside an electrode chamber. The resistance is connected in series with the motor windings to reduce terminal volts, starting torque and current drawn from the line.

As the motor runs up to speed, there is an automatic decrease in resistance value with a consequent increase in motor voltage, giving smooth acceleration without torque or current peaks.

At the end of the run-up period a timed contactor closes and short circuits the residual resistance.

Reduction of the starting torque is determined according to the requirements of the driven machine or the current limitation.

Electrical features:

ReferenceProtectionNumber of electrode assembliesRatingShort circuit contactor (choice)
RC2P/3IP31330 kW (40 ch.) max25 A
50 A
125 A
RC2E/3IP52330 kW (40 ch.) max
RC5P/3
RW5P/3*
IP31375 kW (100 ch.) max25 A
45 A
50 A
125 A
200 A
300 A
RC5P/6
RW5P/6*
IP316150 kW (200 ch.) max
RC5P/9
RW5P/9*
IP319225 kW (300 ch.) max
RCE5/3
RWE5/3 *
IP52375 kW (100 ch.) max
RCE5/6
RWE5/6*
IP526150 kW (200 ch.) max
RCE5/9
RWE5/9*
IP529225 kW (300 ch.) max
RZ2/3IP11330 kW (40 ch.) max
RZ5/3IP11375 kW (100 ch.) max
RZ5/6IP116150 kW (200 ch.) max
RZ5/9IP119225 kW (300 ch.) max
RZ5/12IP1112300 kW (400 ch.) max
RZ5/15IP1115750 kW (1000 ch.) max
WSPIP31NA445 A
550 A
800 A
1000 A
WSEIP52NA

Voltage between phases: 690 V

* In case the starter is made of more than one enclosure, only one has a thermostat.

The RC or RW enclosure consists of the starting electrolytic resistance and the short-circuit start and run contactor with relay timer.
The resistance frame RZ consists of the resistance only with a thermostat*, and can be delivered with separate waterproof enclosure WS for chemical industries and for marine environments (see below).
The WS3 enclosure has been designed to accept equipment which cannot be mounted in RC and RW enclosures and when the starter is supplied with RZ type resistance frames.

Further features

ElectrolyteComposition : In powder or crystal form for mixing with drinking water and anti-evaporation oil
Electrolyte temperature is controlled by thermostat 16 A/400 V.
Electrolyte level: level is visible through transparency of tanks.
Electrode assemblyThe RED “monophase” 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.
Antigel (option)Protection down to - 20°C
It has to be inserted into the electrolyte before commissioning since it alters its resistivity. Il can be used throughout the year.

General specifications

ReferenceAverage weight with contactor
Without electrolyteWith electrolyte
RC2P/320 kg26 kg
RC2E/320 kg26 kg
RC5/325 kg40 kg
RC5/645 kg75 kg
RC5/970 kg115 kg
RW5/340 kg55 kg
RW5/660 kg90 kg
RW5/985 kg130 kg
RZ2/37 kg13 kg
RZ5/312 kg27 kg
RZ5/624 kg54 kg
RZ5/935 kg80 kg
RZ5/1247 kg107 kg
RZ5/1560 kg135 kg

In order for us to quote a starter adapted to your application, please let us know the following information:

About the starter:

  • Power
  • Speed (rpm)
  • Stator voltage
  • Required starting torque
  • Motor voltage
  • Stator current

About the driven machine:

  • Type
  • Coupling method
  • Moment of inertia
  • Speed (rpm)
  • Number of consecutive starts

About starter options:

  • Protection IP31 or IP52
  • Tropicalisation
  • Antifreeze
  • Breathing pipes
  • Louvres
  • Level lamps
  • Ammeters
  • Thermostat
  • Corrosion proof PVC frames
  • WS enclosure in polyester

Particular specifications:

  • Control panels

Consumables:

  • Electrolyte
  • Antifreeze
  • Anti-evaporation oil

Starter enclosure protected version RC or RW:

Ordering code structure: R-Number of chassis-Power-Protection/Number of electrode assemblies-Contactor

Please select the required options from tables below to define the right device reference.

Number of chassis

C                     One

W                     Several

Power

2                      Low power, 30 kW (40 ch.) max

5                      Medium power, from 75 to 225 kW (300 ch.) max

Protection

P                      IP 31

E                      IP 52, waterproof

Number of electrode assemblies

3                      3 electrode assemblies

6                      6 electrode assemblies

9                      9 electrode assemblies

n                      n electrode assemblies

Incorporated short ciruit contactor

B25                  25 A

B45                  45 A (RC5 or RW5 only)

B55                  50 A

B125                 125 A

B200                 200 A (RC5 or RW5 only)

B300                 300 A (RC5 or RW5 only)

Options and accessories:

Tropicalisation

Antifreeze

Louvre doors

Level lamps when tanks are covered with louvres

Amperemeter with current transformer

Resistance frame RZ:

Ordering code structure: RZ-Power/Number of electrode assemblies

Please select the required options from tables below to define the right device reference.

Power

2                      Low power, 30 kW (40 ch.) max

5                      Medium power, from 75 to 225 kW (300 ch.) max

Number of electrode assemblies

3                      3 electrode assemblies

6                      6 electrode assemblies

9                      9 electrode assemblies

n                      n electrode assemblies

Options and accessories:

Tropicalisation

Separate enclosure WS:

Ordering code structure: WS-Protection- Contactor

Please select the required options from tables below to define the right device reference.

Protection

P                      IP 31

E                      IP 52, waterproof

Incorporated short ciruit contactor

B445                 445 A

B550                 550 A

B800                 800 A

B1000               1000 A*

* Box 1000 x 800 x 400 mm

Options and accessories:

Tropicalisation

Antifreeze

Louvre doors

Level lamps when tanks are covered with louvres

Amperemeter with current transformer

Breathing pipes

Anti-corrosion GRP enclosure