feature mentioned below are other than the normal features of conventional
Dual push button full collective control with Auto / Attendant selection.
AGAINST MALFUNCTION AND ACCIDENTS
In addition to Electromechanical Relay safety logic, system provide simultaneous
Computer monitoring & guiding system, Co-working with relays to enhance
safety and protection against accidents. For example; System can detect
fault from intentionally jumped on accidentally by passed car door safety
contact and hoistway door interlock and display the corresponding Error
code and prevent the lift from running with doors open.
TECHNOLOGY FOR HIGH RELIABILITY AND TROUBLE FREE OPERATION.
System employs technically advanced Intel's 8051 family micro controller
known for its everlasting high performance and other high quality components'
design and tested to withstand the worst Indian conditions of power fluctuations
and high temperature environment to achieve fit-and-forget solution for
FIRE FIGHTING SYSTEM
On operating the fireman switch, lift automatically turns to attendant
mode after dropping the passengers safely to Ground floor. Indication
of fire will be displayed on the car-operating panel as well as on all
floor-operating panels to alarm the users.
The system employs low power CMOS device Digital system to consume lesser
power and to prevent unnecessary warming which is not only uneconomical
but also cause aging and timely deterioration of system.
FAULT DIAGNOSIS (AFD)
Over 25 fault codes are displayed on hall operating panels and car-operating
panel that simplifies maintenance. From the corresponding fault number,
faulty area can be detected and thus reduces down time. Any local electrician
can be trained for detecting and removing such faults with the help of
inbuilt AFD and maintenance manual, especially for remote areas. Thus
the time of inconvenience to the user is reduced.
If the lift remains not in use for 45 seconds, the lift automatically
achieves its parking state. In this condition Microprocessor along with
the fan and lights inside the lift turns OFF and automatically turns ON,
if any call is received thus preventing untimely deterioration and power
In addition to illumination of call registration switch, the registration
of call is also indicated by call acceptance beep to confirm the user.
A pre arrival tone is sounded to alert the passengers to get in or to
get down the car before stopping the car to any floor.
MODE INDICATION (Auto/Attendant)
Along with the direction and position indication, the mode of working
(Auto/Attendant) is also displayed on car operating panel as well as on
all floor-operating panels.
The controller is designed to tolerate high temperature condition of Indian
environment and hence having elaborate ventilation system in the machine
room is not needed.
Indication of overloading by blinking jewel and beep tone and stopping
the lift from running until it is cleared which make sure that lift is
not subjected to the condition of locked rotor, over stress etc.
While door closing, system provides automatic reversing of door if any
passenger is detected between the doors by the series of Infra red sensors,
without touching or hitting the person.
Problem arising due to power supply (phase failure etc.), Emergency switch
pressed, Door blocked etc. is displayed on floor operating panel as well
as on car operating panel by blinking P, E, d etc. The problem can be
understood and can be attended by the user itself.
ADDED WITH AC V.V.V.F. DRIVE SYSTEM
this new technology, Alternating current is converted by a rectifier into
direct current and thereafter by an inverter again into Alternating current
with variable voltage and variable frequency (VVVF) for application to
the lift main motor. It provides the following advantages.
No power is drawn from supply network during braking and there is very
low power loss in the lift motor that makes the Drive system highly efficient.
Thus up to 50% energy can be saved over conventional drive system, Which
deserves not only by your bank account but also by Nation and Mother Nature.
This energy saving will retrieve the installation cost in a very short
span of time.
The peak starting current is only about 1.2 times of motor running current
as compared to 4 to 6 times in conventional drive system. It prevents
high spike generation and line voltage fluctuations to the loads connected
on same power line.
Although the new drive is sparing in its use of energy, it develops ride
quality on which all passengers are keen: Gentle acceleration and precise
stopping, Step less starting and braking without realizing it.
Immaculate leveling accuracy of +/- 5mm can be achieved with this system.
Highly reliable AC motor with solid state VVVF drive system do not require
any regular maintenance compared to Ward Leonard drive system which employs
an additional motor generator set and DC motor which require regular maintenance
The power factor (cos phi) of drive system is almost equal to 1. The system
can work with additional power source generator, having the maximum output
K.V.A. rating just above the K.W. rating of the main motor.
TO PHASE REVERSING
Lift continues it normal operation on the condition of phase being reversed,
where as other lift stops under this condition.
The voltage requirement for this system is 380 to 415 volts + /- 15% whereas
in case of other systems it is 415 volts +/- 5%. Thus the requirement
for voltage stabilizer is not necessary to be taken in consideration.