Specifications

Enquiry Specification for Wagon Tippler with Side Arm Charger and Associated works
NRO/CON/WT/533
EPI – New Delhi Volume-2B, Rev.0 Page 45 of 63
8.0 TECHNICAL SPECIFICATION FOR
VARIABLE FREQUENCY DRIVE (VFD)
1.0
Basic design
particulars
-
Digital control
technology
with vector control
(with /
without PG as per requirement) .
- IGBT based with sine coded PWM control.
-
VFD shall communicate to basic automation
system on
system communication bus .
- Suitable for variable torque or constant torque
applications requiring harmonic control as
defined by
IEEE 519-1992.
-
The drive shall have an internal EMC filter
capable of
meeting the Second Environment levels for the
EMC
directive without the need for additional
components.
-
Shall confirm to IEC 146 -International
Electrical Code.
-
For 4 quadrant operational drives , active front
end type
VFD shall be provided .
-
Where speed control I desired for production
and quality
control VFD isto be provided .
-
Where speed control is not required sof t
starter or motor
intelligent controllers are to be provide.
2.0 Drive controller
technology
-
Software configurable to either V/Hz (single or
multi motor) mode or Sensorless Dynamic
Torque Vector mode (single motor). -Full,
closed loop flux vector control shall be
available for constant torque applications. -
Operating the drive with motor disconnected. -
Adjustable PWM carrier frequency within a
range of 3 – 15 KHz. -Suitable for use on both
CT & VT loads. -Multiple programmable stop
modes including -Ramp, Coast, DC-Brake,
Ramp-to-Hold and S-curve. -Multiple
acceleration and deceleration rates.