characteristics of frequency inverters, type vkv...

the frequency inverter, type vkv.. is used with single-speed, 3-phase ac-motors for use with

• elevators
• hoists
• inclined hoists
• hospital lifts and
• further conveyor systems.

for

• smooth starting with reduced current
• smooth slow down with optimized progress of motion
• exact positioning with gentle treatment of the a.c. motor, the brake and the control system.

features

• compact assembly
• input filter and output choke included (all vkv...); external input choke (to reduce the 5th harmonic)
• type vkv with vka-cabinet is for wall-mounting and includes power-contactors and input choke.
• type vkv with vks-cabinet is for wall-mounting and includes all EMC-filter measures (according to DIN EN 12015), the power-contactors and the input choke.
• relay output for the mechanical brake and security cutout
• built-in temperature-controlled blower to cool down the electronic-circuits and the power stage
• electronic current-control for a 200% overload capability (0,5s) and 150% overload capability (1min.)
• fast power-off in the case of a short-circuit or short to earth (output stage)
• processor-controlled BITE - System (Built-In-Test-Equipment) to watch internal functions
• LC-Display for parameterization (password-protected ) and system readout
• event log (stores the last 40 events)
• data-link to Notebook / PC via RS232
• analysis of the last drive and drive diagram recording via PC (RS232)
• remote diagnostic via MODEM
• PWM-clock frequency adjustable up to 16 kHz. During overload condition automatically reduced to 4 kHz.
• soft loading of the DC-link circuit
• removable display
• inverter can be operated with residual-current circuit-breakers (IF > 300mA / 500 mA)
• real time clock (RTC) included

Six separate adjustable velocities to provide a maximum of convenience:

• v3 - adjustable from low to high speed (up to 4 m/s)
• v2 - adjustable from low to high speed (up to 4 m/s)
• v1 - adjustable from low to high speed (up to 4 m/s)
• v0 - creeping speed
• vN - readjustment speed
• vR - inspection speed
• during a drive (with v0, v1, v2, v3) it is possible to alternate the selected speed as often as You want
• during acceleration or deceleration no alternation between the selected speeds is allowed

further details:

• further states indication via LED’s
• separate relays for the power contactors and the mechanical brake (controlled by Software). To provide a maximum of security, this relays are switched-OFF after a predefined time (hardware controlled)
  
  
• extra relay (speed controlled) for e. g. earlier door opening
  
  
• failure-monitoring (self-hold state)
  • external over-current (short circuit, short to earth)
  • internal over-current
    
    
• failure-monitoring including self-reset
  • power-stage overheat
  • chopper-resistor overheat
  • phase-failure
  • over-voltage (input stage)
  • over-voltage (DC-link circuit)
    
    
• failure-monitoring with event-log
• to RESET the controller in the self-hold case just turn OFF the control voltage (230V AC)
• the vkv - controller is built for wall-mounting. Cover the air-intake and /or air-exhaust will damage the controller. Avoid unintended removal of the connecting-cable and additional wiring.
• brake resistors will get very hot during operation. Adequate heat dissipation is required. Do not cover! Do not touch!
• cabinet-mounting needs adequate ventilation.
• accessory: Line-filter and motor-filter to cover the EMC regulations (DIN EN 12015)