PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

The HT Panel board for motors shall be capable to provide the following
signals/data to the PLC for automation/visualization.
■ Voltage on either side of the bus coupler, current for each outgoing feeder,
energy consumed as well as incoming frequency.
■ The HT panel board should be capable for switching on/off from local
(pump house) or remote (i.e. from PLC via the MMI).
■ Basic information of each breaker such as breaker on/off/trip, in test/service
position etc. to be informed to PLC. PLC & MMI PC system is however
outside the scope of this work.
■ The auxiliary supply for tripping coil/closing coil (110V DC or 220V DC)
shall be built-in power pack through rectifier unit and for spring charging
motor of the VCB and that of the space heater, indication etc. of the panel,
external 230V power shall be supplied for external source to the built-in
wiring of the panel offered.
Push button operated DOL starter :
DOL starter shall be of double break type and shall incorporate air break contactor
with bimetallic thermal electro magnetic overload relays on all three phases with
start/stop push button in front of switch board. The starter shall be capable of
10 operations per hour. The DOL starter shall conform to IS:13947 Part 4 – Sec 1
(IEC 947-4-1 -1990).
Star/Delta Starter:
The push button operated Star Delta Starter shall be of the fully automatic type with
an adjustable timer incorporated for automatic change-over from Star to Delta. The
starter shall incorporate the electro magnetic or thermal type bimetallic overload
releases, pneumatic electro time delay relay, the solenoid coil operated under
voltage release and current operating single phasing preventor. The starter shall be
capable of 10 operations per hour. The starter shall conform to IS:13947
Part:4 Sec 1 (IEC 947-4-1 -1990).
GTS : General Technical Specification. Page 112