TYPICAL
INTERLOCK & PROTECTION REQUIRED FOR BFP COMMISSIONING
Ensure completion, installation and readiness of all
instrumentation works, as per instrumentation
schedule, on BFP/ Booster pump/ Motor/ Hydraulic coupling/ de- aerator.
Calibration, setting and testing of primary instruments.
Pressure gauges/ switches/
transmitters calibration and installation and wiring up to JB.
Level gauges/ switches/
transmitters.
Limit switches.
Installation of JBs, cabling & termination in local and
control room.
Readiness of
control supply to Panels:
Availability of LT & HT supplies and readiness of electrical protection instruments.
Readiness of mechanical system.
Oil system
De=aerator
Compressed air system.
( Compressed air is required for pneumatic valve operation.
Charging and testing of panels.
Commissioning of motorized valves, actuators & pneumatic re circulation valve.
Checking of Interlocks,
protections & Alarms: .
(i) Calibration of speed control device like scope
tube /thyrister control etc
(ii) Oil pressure low
(iii) Suction valve open
(iv) De-aerator level low
(v) Feed pump suction/ discharge temperature
high.
(vi) Balancing leak off pressure. high
(vii) Re circulation valve open
viii) Bearings vibrations high (wherever provided)
ix) Remote/ local tripping
TRIAL RUN OF
HYDRAULIC COUPLING
Readiness of lubrication oil & working oil coolers and
availability of cooling water.
Charge lubrication oil and
working oil coolers.
Checking of HC interlocks & protections
Ensure alignment of Hydraulic coupling with BFP motor.
Ensure proper earthing of
Hydraulic coupling.
Check oil level in hydraulic coupling sump.
Start AOP and monitor lubrication oil header pressure.
Start trial run of Hydraulic coupling.
Check regulating oil pressure and set, if required.
Monitor all parameters of hydraulic coupling; Gauges are available
/mounted on the equipment
I.
Lubrication oil and Regulating oil pressure.
ii.
Motor current.
iii.
Hydraulic coupling bearings temperatures.
iv.
Lubrication oil temp at L. O. cooler inlet and outlet.
v.
Working oil temp at W.O. cooler inlet and outlet.
vi.
Motor winding temps.
TRIAL RUN OF BFP
1 Ensure free
rotation of BFP by hand before coupling.
2 Ensure
completion of alignment:
I.
Motor & Booster pump
ii.
Motor & hydraulic coupling.
iii.
Hydraulic coupling & BFP
Special attention to be given on pipe line final connection.Pipes to be ensured as free body through
hanger adjustment. No tension on pipes is permitted otherwise alignment will be disturbed.
3 Flushing of
mechanical seal cooling water lines for BP as well as BFP & Mechanical seal
water
cooler cooling water lines.
4 Optimisation
of oil flow through bearings by using orifice plates
5 Running of AOP
6 Charging of
all system:
(i) Lubrication oil/ working oil coolers
(ii) Seal water coolers
(iii) Suction
valve opening
(iv) Re circulation valve (Isolation valve) opening
(v) Charging of C&I local panels
7 Fill de=aerator
and maintain normal level.
8 Interlocks
& protections checking.
9 Start BFP.
10 Monitor all
parameters of BFP and motor;
I.
Current
ii.
BFP suction pressure.
iii.
BFP discharge pressure.
iv.
Balancing leak off pressure.
v.
De-aerator level.
vi.
BFP suction/ discharge Differential Temperature.
vii.
Lubrication oil/ working oil pressures and temps.
viii.
Booster pump/ BFP/ Motor/ Hydraulic Coupling bearings and drain oil
temps.
ix.
Cooling water temps.
x.
Seal water/ seal water coolers temps.
xi.
Motor winding temps.
xii.
Bearing vibrations.
