VM Engineering
Call Now! 91422 2424908
LEKTROMIK B1, B4, E42
Products
  Brakes & Clutches
  Inverter
  Soft Starters & DC Injection's Brakes
  Encoder’s and Dro Scales
 
  Textile Spares
  Ceramic Tread Guides
 
  Welding Ceramics

LEKTROMIK B1
Electronic Braking Modules

LEKTROMIK B4
Electronic Braking Controllers
Braking of three-phase induction motors up to 160 kW

LEKTROMIK E42
Electronic Soft Starters with D. C. Injection Brake
Soft-starting and Braking of three-phase induction motors up to 22 kW

Applications

  • Braking dangerous machines with long run-down times
  • Saws, planers
  • Grinding machines
  • Braking of vibration motors
  • Mills
  • Roller table drives
LEKTROMIK B1
Electronic Braking Modules
LEKTROMIK B4
Electronic Braking Controllers
Braking of three-phase induction motors up to 160 kW
LEKTROMIK E42
Electronische Soft Starters with D. C. Injection Brake

User benefits
Mechanical

  • Reduced maintenance costs:
    • Electronic brakes require no maintenance (no braking linings etc.)
    • Fast stopping of damaged equipment e.g. with imbalance
  • Undesirable resonances can be prevented
    • Motor vibrators can be stopped quickl

Safety

  • Fast electronic braking increases safety:
    • Machines can be stopped within 10 s
    • Machines with very high inertia should not be left unattended while they are running down
Productivity
  • Reduced waiting time to change or service tools eliminated or for reversing:
    • Especially useful with high inertia equipment

Features

  • Braking torque and braking time-out are separately adjustable
  • Easily retrofitted
  • Fast start of braking operation (e.g. approx.0.3s with LEKTROMIK B1)
  • Simple connection with standard contactors
  • Can be used without braking contactors
  • Can be used as a combined soft-start and injection brake:
    • LEKTROMIK B1: with soft start module KIMODUL DMA
    • LEKTROMIK B4: with soft start LEKTROMIK S2
    • LEKTROMIK E42: (integrated soft start and injection brake controller)

Principle of operation

LEKTROMIK B1 and B4 use the principle of d.c. injection in the stator winding. The resulting stationary magnetic field retards the rotor. The braking torque depends on the magnitude of the current which can be varied by phase-controlled thyristors. This allows the decelleration to be varied over a wide range.

With LEKTROMIK B1 two thyristors are connected as a single-phase controlled rectifier. The firing circuit generates the required trigger pulses. The trigger pulses are synchronised with applied line-to-line voltage. A neutral connection is not required.

LEKTROMIK B4 use full-wave control of 4 thyristors. The resulting braking current is almost pure d.c. This results in a high braking torque with little vibration.

Available types

Available types LEKTROMIK B1 LEKTROMIK B4 LEKTROMIK E42
Motors Slip-ring motors Refer to supplier    
Three-phase induction motors
•
•
•
Pole-change motors Refer to supplier Refer to supplier Refer to supplier
Modes of operation Electronic braking
•
•
•
Soft start    
•
Features Phase control 1 Phase Full-wave control 2 Phases
Braking torque Good Excellent Good
Vibration torque Normal Low Normal
Motor noise Normal Low Normal
Required braking current Normal Low Normal
Functions Electronic zero-speed detection Refer to supplier
•
Refer to supplier
Current limit (Braking current)  
•
 
Electronic soft start with: KIMODUL DMA LEKTROMIK S2 Integrated
Power range at rated voltage 0.25... 7.5 kW/
3AC 400V		 2.2... 160 kW/
3AC 400V		 0.55... 22 kW/
3AC 400V

Typical installations

  • Circulator saws, planers for woodworking – stopping time reduced to a few seconds
  • Grinding machines – fast braking
  • Conveyors for parcel handling equipment – fast controlled braking with electronic contactors switching for no-maintenance operation
  • Vibrator motors on grading plant
    • Fast braking to avoid dangerous resonances in the structure
  • Large rail-guided opencast mining excavators
    • Adjustable braking of multi-motor drives
  • Roller table drives in steel works
    • Adjustable braking of multi-motor drives

Chart of equipment

LEKTROMIK B1
Electronic Brake Modules for induction motors up to 7.5kW

Motor power Supply voltage Max. braking current Equipment code Dimensions [mm] Special features
Height Width Depth
  • Low-cost brake modules for mounting on 35 mm DIN rails
  • Simple connection with standard contactors
  2 AC   LEKTROMIK      
0.75...2.2 kW 400 V 11 A / 10 s 2B1 - 14 75 45 120
1.1 ...5.5 kW 400 V 30 A / 10 s 5B1 - 14 75 45 120
1.1 ...7.5 kW 400 V 36 A / 10 s 7B1 - 14 75 60 120
0.55...3.0 kW 230 V 30 A / 10 s 3B1 - 14/230 75 45 120


LEKTROMIK B4
Electronic Brake Controllers for three-phase induction motors up to 160 kW

Motor power Supply voltage Max. braking current Equipment code Dimensions [mm] Special features
Height Width Depth
  • High retardation with small braking current
  • Low vibration level and motor noise
  • Integrated zero-speed detection
  • CT to limit max. braking current
  • 2 AC 230 V Control voltage
  2 AC   LEKTROMIK      
2.2 ...15 kW 230...500 V   52 A / 12 s   15B4 - 26 200 168 145
4.0 ...45 kW 230...500 V 150 A / 12 s   45B4 - 26 200 168 145
7.5 ...90 kW 230...500 V 300 A / 12 s   90B4 - 26 300 250 220
7.5...160 kW 230...500 V 560 A / 12 s 160B4 - 26 300 250 220

LEKTROMIK E42
Electronic Soft-Starters with integrated d. c. injection brake for three-phase injection motors up to 22 kW
Motor power Supply voltage Max. braking current Equipment code Dimensions [mm] Special features
Height Width Depth
  • Smooth soft start
  • Fast switchover to braking (approx. 200 ms)
  • Operation without braking contactor
  3 AC   LEKTROMIK      
0.55 ...4 kW 400 V   36 A / 8 s   4E42 - 24 220 168 110
2.2 ...11 kW 400 V   78 A / 8 s 11E42 - 24 220 168 145
4.0 ...22 kW 400 V 156 A / 8 s 22E42 - 24 320 168 145

Product conformance

EMV-
DIRECTIVE		 LOW-VOLTAGE
DIRECTIVE		 MACHINERY 
DIRECTIVE
  • EC Declaration of Conformity with CE marking based on:
    • Product standard IEC 947-4-2
    • RF interference EN 55011
    • Immunity EN 61000-4-2/-3/-4/-5
  • EC Declaration of Conformity with CE marking
  • Manufacturer's declaration is available
  • Class B interference limit - suitable for unrestricted operation on public electricity supplies
  • Standard used: 
    • IEC 947-4-2 
    • EN 50178
  • Designed for installation to EN 60204-1