1 1
EMSD Annual Technical
Seminar
Thursday, 10 November 2016
2 2
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)
:
1. ,
2.
3.
4.
5. Q&A
2004 6 29
•
2013 11 15
•
•
•
•
•
•
1.
2.
3.
•
•ACB
CT
•
CT
• CONTROL FUSE FUSE
40
CONCON
UPSBATTERY CHARGER ;
•
•
•
•
•CABLE GLAND
: 2000A (Elbow Busduct)
:
• 2 x 2500A ACBs + 1 x 2000A ACBs tripped at 1220 hrs • 25/F to 39/F • 5/F to 15/F • 8
2000A (BUSDUCT)
: 15/F , 7/F , (dead short)
2000A (BUSDUCT) 1.
2. 3. 4. ( )
2000A (BUSDUCT)
2000A (BUSDUCT)
2000A (BUSDUCT)
: 2000A (Busduct) 2000A Busduct Elbow Burnt Incident
:
1. ( /)
2. 3. (THERMAL
SCANNING)
: 3200A (Busduct)
:
• ,
3200A
:
3200A
: 1. 2. 3.
3200A
: 630A (VCB)
:
• 1 (HV) 550 TR (Chiller) • Busbars , • (Voltage Dip)
630A (VCB)
SURGE ARRESTER ,
BUSBARS
: (Exhaust Air Duct) , , VCB,
630A (VCB)
630A (VCB) 1.
2. SURGE ARRESTERS
3.
630A (VCB)
630A (VCB)
630A (VCB) : 630A (VCB)
:
:
WATER BARRIER
:
WATER SHIELD
:
WATER LEAKAGE DETECTION SYSTEM
:
:
:
• (Large Voltage Dip) •
•
• 20
• G/F ( ) & 20/F ( )
• BUSBAR TRUNKING SYSTEM
• 52
:
53
:
N – B – Y – R (OLD CABLE COLOUR CODE)
54
:
1. DUCTOR TEST?
2. DC CURRENT INJECTION TEST?
3. AC CURRENT INJECTION TEST?
55
:
56
1.Ductor Test?
:
57
2. DC Current Injection Test?
:
58
3 AC Current Injection Test?
588
:
?
?
?
Z R X 59
:
R
(ELECTROMAGNETIC INTERFERENCE)
60
1.
2.
(TRANSPOSING METHOD)
61
:
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
:
( )
63
:
• 1250A
64
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)
:
65
:
67
1200A ACB
1600A ACB Incomer
(BMS SYSTEM)
:
68
:
69
1200A ACB Built-in O/L
IDMT - E/F Protective Relay
:
70
• Built-in O/L
• IDMT E/F Protective Relay
• IDMT O/C Protective Relay
:
71
UNDERVOLT SENSING SIGNAL FROM S.W. BD ‘LVSB-A-04’
:
72
UNDERVOLT SENSING SIGNAL FROM S.W. BD ‘LVSB-A-04’
:
73
:
74
:
75
:
76
:
77
78
79
80
/
?
?
?
2015 Edition
86
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