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 54 of 63
5.0 Intelligent motor
controller
-As defined in clause no. 1.02.08 .
6.0 Motor protection
relay (for non
intelligent panel)
-Microprocessor based. -Suitable for 5A & 1A -
Protections • Short circuit • Overload • Earth fault •
Stalling protection • Undervoltage • Overspeed • No.of
starts per hour (cold & hot) -Communication facility with
PLC. -Memory for • Storing fault history & trending
7.0 Auxiliary contactors -Shall be provided for logic operation and operating
sequence . -Shall have minimum 2NO+2NC auxiliary
contacts.
G. Panel Wiring
1.0 Power / current
transformer circuit
1.1Kv grade single core , black colour PVC insulated ,
stranded copper conductor of minimum size 2.5 sq.mm.
1.0 Power / current
transformer circuit
1.1Kv grade single core , black colour PVC insulated ,
stranded copper conductor of minimum size 2.5 sq.mm.
2.0 Control and
potential circuit
-1.1Kv grade single core -Black colour PVC insulated -
Stranded copper conductor of minimum size 1.5 sq.mm.
3.0 Ferrules -Numbered plastic/ceramic ferrules. -Self locking type.
4.0 Marking -Wiring will be properly marked as per relevant IS.
5.0 Spare contacts -All spare contacts of relays selector switches &
contactors will be wired upto the terminal block. -Each
components shall have at least one potential free spare
contacts.
6.0 Terminals -Power & control terminals shall be segregated by
insulating material like hylam / bakelite sheet. -Power
terminals shall be stud type. -Control terminals shall be
suitable for connecting two cores of 2.5 sq.mm wires. -
Minimum 20 % spare terminals shall be provided. -The
minimum rating of control terminal shall be 10 Amps. -
Color coded wires, TB’s of different voltage rating to be
provided . -Uniform color-coding to be followed for
cabling, TB, etc.
7.0 Cable glands Double compression cable glands for receiving external
power and control cables
I. Control Supply
1.0 Control
transformer
1 nos. of 415V/240V control transformer of minimum
2.5 KVA Secondary unearthed.
2.0 Input and output
side isolation
device
Input side :MCB Output side :MCB
Output side :MCB Output side :MCB