f£CYÕ5e óWô#r MU ³7ð!® S
Transcript of f£CYÕ5e óWô#r MU ³7ð!® S
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EMSD Annual Technical
Seminar
Thursday, 10 November 2016
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Ir K F Yee BEng(Hons), MSc(Eng), CEng, FCIBSE, FIET, FEI, FBSOMES MHKIE, RPE (BSS, ELL, ENY, FRE), REW(C0, H0), RSO, RSA, REA Committee Member and Honorary Treasurer (2007 – Present) The Hong Kong Institution of Engineers – Building Services Division Recognized Trainer of EMSD - CPD Scheme for REW Committee Member (2001-2007) HKIE - Safety Specialist Committee (HKIE-SSC) Past President (2008-2010) Building Services Operation and Maintenance Executives Society (BSOMES) Hon. Secretary (2015-2016) Energy Institute Hong Kong (EIHK)
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4.
5. Q&A
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•ACB
CT
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CT
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• CONTROL FUSE FUSE
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CONCON
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UPSBATTERY CHARGER ;
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•CABLE GLAND
: 2000A (Elbow Busduct)
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• 2 x 2500A ACBs + 1 x 2000A ACBs tripped at 1220 hrs • 25/F to 39/F • 5/F to 15/F • 8
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2000A (BUSDUCT)
: 15/F , 7/F , (dead short)
2000A (BUSDUCT) 1.
2. 3. 4. ( )
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2000A (BUSDUCT)
2000A (BUSDUCT)
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2000A (BUSDUCT)
: 2000A (Busduct) 2000A Busduct Elbow Burnt Incident
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1. ( /)
2. 3. (THERMAL
SCANNING)
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: 3200A (Busduct)
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3200A
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3200A
: 1. 2. 3.
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3200A
: 630A (VCB)
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• 1 (HV) 550 TR (Chiller) • Busbars , • (Voltage Dip)
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630A (VCB)
SURGE ARRESTER ,
BUSBARS
: (Exhaust Air Duct) , , VCB,
630A (VCB)
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630A (VCB) 1.
2. SURGE ARRESTERS
3.
630A (VCB)
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630A (VCB)
630A (VCB) : 630A (VCB)
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WATER BARRIER
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WATER SHIELD
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WATER LEAKAGE DETECTION SYSTEM
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• (Large Voltage Dip) •
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• G/F ( ) & 20/F ( )
• BUSBAR TRUNKING SYSTEM
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N – B – Y – R (OLD CABLE COLOUR CODE)
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1. DUCTOR TEST?
2. DC CURRENT INJECTION TEST?
3. AC CURRENT INJECTION TEST?
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1.Ductor Test?
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2. DC Current Injection Test?
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3 AC Current Injection Test?
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Z R X 59
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R
(ELECTROMAGNETIC INTERFERENCE)
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1.
2.
(TRANSPOSING METHOD)
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MA
IN S
WB
D
HVAC SWBD
TO HVAC LOAD
R Y B N
Y B R N
B R Y N
High Zone
Mid Zone
Low Zone
R
Y
B
N
G/F 62
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( )
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• 1250A
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Location of MeasurementR-N Y-N B-N
Measured at G/F Main Switch Room 217V 219V 219VMeasured at HVAC Switch Room 211V 219V 219V
Phase Voltage (Vp)
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1200A ACB
1600A ACB Incomer
(BMS SYSTEM)
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1200A ACB Built-in O/L
IDMT - E/F Protective Relay
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• Built-in O/L
• IDMT E/F Protective Relay
• IDMT O/C Protective Relay
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UNDERVOLT SENSING SIGNAL FROM S.W. BD ‘LVSB-A-04’
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UNDERVOLT SENSING SIGNAL FROM S.W. BD ‘LVSB-A-04’
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2015 Edition
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