Enquiry Specification for Wagon Tippler with Side Arm Charger and ...

Enquiry Specification for Wagon Tippler with Side Arm Charger and Associated works
NRO/CON/WT/533
18.0 Load side
components
-Filter network -Electronic over-load relay for
each motor (with display). -Line contactors in
output side (if required). -Output reactor /
terminator (if required)
19.0 Terminal blocks -Separate for control and power wiring. -Power
terminal blocks to withstand a minimum of 90 ºC
and marked for both inputs and outputs . -
Uniform color-coding to be followed for cabling,
TB, etc.
20.0 By-pass
Arrangement
By-pass arrangement shall be provided to operate
the motor in case of failure of VFD.
21.0 Diode Bridge Minimum ratings of Diode cells. -PIV rating : 2.5
times the peak value of line voltage -dv/dt rating
: 200V/microsecond for voltage control and
1000V/ microsec. for inverter control. -di/dt
rating : 100A / microsecond.
22.0 Input / Outputs • Hardwired I/O should be provided via separate
I/O cards -Standard I/O Card • The “Standard
I/O board should consist of both digital and
analog I/O. It should be available in two versions;
one for 115/240 VAC digital I/O and one for 24V
AC/DC digital I/O. -Analog I/O • Differentially
isolated ±10V (bi-polar) / 20mA analog inputs . -
Digital Outputs • Relay outputs – Minimum 04
nos. • Contact output ratings should be 240V AC /
24V DC, Maximum 2.0 Amp
23.0 Protective features AC line surge suppression network and
overvoltage protection . -Under voltage in supply
network -Phase sequence protection and
monitoring -Single phase failure -Motor loss -
Under voltage in DC bus -Over voltage in DC bus
-Over speed protection in the event that the
output frequency exceeds the maximum reference
by a specified amount. -Over load -Earth fault -
Instantaneous over current -Transformer fault ,If
applicable -Cooling fan failure -Stall monitor for
motor alarms -Controlled shut down, when
properly fused, with no component failure in the
event of an output phase to phase or phase to
ground short circuit and annunciation of the fault
condition.
24.0 Annunciations Following faults shall be annunciated in keypad of
the drive / HMI . -AC line surge suppression
network and overvoltage protection . -Under
voltage in supply network -Phase sequence
protection and monitoring -Under voltage in DC
bus -Over voltage in DC bus -Over speed monitor
-Over load -Earth fault
EPI – New Delhi Volume-2B, Rev.0 Page 48 of 63