KEYS-Eng-TD-Pocket-Manual

POCKET FIELD
MANUAL
Tables, Formulas & Data for
Engineering and T&D Personnel
2019

TABLE OF CONTENTS
Formulas
Electrical Formulas 1
OHM’S Law 2
Metering
CT Metering Determination 4
Meter Type Selection Table 5
Phase Rotation Connection for Meter can 6
Network Connection Single-Phase 7
Net-meter Connection 120 Single-Phase 8
Conductor/Transformer Data
Full Load Currents – 1/Ø Transformers 9
Full Load Currents – 3/Ø Transformers 9
Ampacity – Service Conductors 10
Ampacity – Overhead Conductors – Bare 11
Ampacity – Underground Primary 11
Ampacity – Low Voltage Wire 12
Conductor Impedance’s 13
Conductor Code Names 13
Conductor in Conduit 14
Maximum Conductor per Single-Phase Pad mount 15
Voltage
Voltage Limits 16
Transformer Sizing Guide 17
Transformer Voltage Drop 18
Voltage Regulator Capacity 18
Secondary Voltage Drops
1/0 Triplex – 120/240 19
4/0 Triplex – 120/240 20
1/0 Quadruplex – 120/208 21
4/0 Quadruplex – 120/208 22
Voltage Flicker and Curves
Percent for 1/0 Service Cable 23
Percent for 4/0 Service Cable 23
Flicker Limits 24
Percent for Transformer 24
Motor Starting KVA 25
Motor Amperage 26
Transformer Connections
Sizing Open Delta Banks 27
Sizing Closed Delta Banks 28
I

Distribution Transformer Connections
3/Ø, 4 wire primary/4 wire delta 120/240 V 29
3/Ø, 4 wire open wye primary/3 wire open 480 V 29
3/Ø, 4 wire primary/4 wire secondary 120/208 V 30
3/Ø, 4 wire primary/4 wire secondary 277/480 V 30
3/Ø, 4 wire open wye primary/4 wire open delta 120/240 V 31
Fusing
Transformer Fusing 32
Capacitor Bank Fusing 32
1/Ø Overhead Fusing 33
3/Ø Underground Fusing 33
Fault Current
Customer Secondary – Aerial Transformers 34
Customer Secondary – Pad mounted Transformers 35
KEYS Substation 36
Pole Depths & Guys
Pole Setting Depths 37
Guy Lead Length 37
Guy Heights & Formula 38
Pole and Transformer Weights and Base Diameter 39
Rope Capacity in Pounds 40
Tension
Sag and Tensions – Primary & Secondary 41
Underground Cable Pulling Max Tension 42
Clearances
NESC Clearance Reference Guide 43
Service Drop Examples 44
Minimum Working Clearances 45
Utility Underground Clearance Notification 46
ADA Wheelchair Passage Width 47
Transmission Line
Line Summary and Circuit Rating 48
Substation Transformer Ratings 49
Keys 138KV Transmission Line Fault Locator Line 4 BCS-US-1 50
Keys 138KV Transmission Line Fault Locator Line 6 BCS-BPS 51
Keys 138KV Transmission Line Fault Locator Line 6 BPS-BCS 52
Keys 138KV Transmission Line Fault Locator Line 7 BPS-MAR 53
Keys 138KV Transmission Line Fault Locator Line 7 MAR-BPS 54
Keys 138KV Transmission Line Fault Locator Line 9 US-1-BCS 55
Keys 69KV Transmission Line Fault Locator Line 1 KDS-WSS 56
Keys 69KV Transmission Line Fault Locator Line 2 WSS-KDS 57
Keys 69KV Transmission Line Fault Locator Line 3 KDS-SIPP 58
Keys 69KV Transmission Line Fault Locator Line 5 US-1-SIPP 59
Keys 69KV Transmission Line Fault Locator Line 8 US-1-KDS 60
Keys 69KV Transmission Line Fault Locator Line 11 KWD-KDS 61
II

Generation Summary
KEYS Generation and SC Ratings 62
Safety
American Red Cross First Aid
Bleeding – Poisoning – Shock 63
Burns – Electrical Shock – Heat Exhaustion 64
Rescue Breathing – First Aid For Choking 65
Relays
IEEE Relay Devices Number & Names 66
SEL Relays Codes 67
Other
KEYS Official TEN Signals 68
Hand Signals for Cranes and Cherry Pickers 69
Useful Knots 71
Centigrade and Fahrenheit Scales 72
Standard Phonetic 73
SEL AR360 Fault Indicator 74
GIS/Map Phasing for OMS/Milsoft 75
Notes: Blank Pages
III

Sin
g
le-
p
hase Three-
p
hase
hp x 746 hp x 746
E x %Eff x pf 1.73 x E x %Eff x pf
Amps when kW x 1000 kW x 1000
kilowatts are known E x pf 1.73 x E x pf
Amps when kVA x 1000 kVA x 1000
kVA are known E 1.73 x E
I x E x pf 1.73 x I x E x pf
1000 1000
I x E 1.73 x I x E
1000 1000
Horsepower- I x E x Eff x pf 1.73 x I x E x Eff x pf
(Output) 746 746
kWh to kW kWh kWh
(kW average) Time (hr) Time (hr)
Amps = PkW x 1000 = I PkW x 1000 = I
1 Megawatt VL-N 1.73 x VL-L
I = Amperes (current)
Kilowatts (kW)
Electrical Formulas for determining amps,
horsepower, kilowatts and kilovolt-amps
To Find
A
lternating Curren
t
Amps when
horsepower is known
1
kW = Kilowatts (power)
hp = horsepower
Kilovolt-amp (kVA)
E = Voltage - L-N (Single Phase)
E = Voltage - L-L (Three Phase)
%Eff. = Efficiency percent efficiency in decimals
pf = Power Factor in decimals
kVA = Kilovolt-Amphs (apparent power)