LS BUS DUCT SYSTEM
GENERAL SPECFICATION
Insulated bus duct for rated 630A through 6000A
Doc. No.
Date:
Prp’d: M.W. Lee
Chk’d:
App’d:
Rev. 2
CONTENTS
PART 1. GENERAL
2
1.1 Description
2
1.2 Standards
2
PART 2. PRODUCT
3
2.1 Manufacturers
3
2.2 Basic Construction
3
PART 3. INSPECTION AND TESTING
6
3.1 Temperature Rise
6
3.2 Short Circuit Strength
6
3.3 Voltage Drop
6
3.4 Insulation Resistance Test
6
3.5 Test of Dielectric Properties
6
PART 4. EXECUTION
7
4.1 Available Vendors and Country of Origne
7
4.2 Installation
7
Appendix # 1 : Short Circuit Ratings
8
For Information
For Review
For Approval
For Construction
Insulated bus duct for rated 630A through 6000A
PART 1.
Sheet 2 of 8
GENERAL
1.1 DESCRIPTION
1.1.1
SCOPE
This specification covers the bus duct system including service entrance, feeder, plug in feeder and
associated fittings which are available for the system voltages AC 1000 V, DC 1500V or less.
1.1.2
STRUCTURE
A. The bus duct shall be of a sandwich type construction. It means that no air gap shall exist
between bus bars except at joint part.
B. The joint part of each feeder, plug in feeder and fittings shall be accessible after installation
for maintenance.
C. The bus duct shall be designed to withstand the short circuit strength.
1.1.3
PACKING AND HANDLING
A. Bus duct products shall be packed with wooden boxes suitable for export transportation and
easy to handle at site. The bus duct in wooden boxes shall be enveloped with poly-vinyl
sheet for waterproof prior to finish whole packing.
B. Bus duct products shall be handled carefully to prevent from damage and stored in dry clean
place away from abnormal weather, dirt and water etc.
1.2
STANDARDS
A. All bus duct shall be manufactured in Quality Systems which is registered by Underwriters
Laboratories to ISO 9000:2000.
B. All bus duct fittings and plug in units shall conform to the following codes and standards.
1.
International Electrical Association (IEC):
IEC60439-1, 2 “Low-voltage switchgear and controller assemblies”
IEC60529
“Degrees of protection provided by enclosures (IP code)”
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
PART 2.
Sheet 3 of 8
PRODUCT
2.1 MANUFACTURER
All bus ducts shall be manufactured by nominated vendors which has ASTA/KEMA full certificates.
2.2 BASIC CONSTRUCTIONS
2.2.1 GENERAL
Provide the bus duct conforming to IEC60439 and complete low impedance sandwich type bus duct
system.
The ampere ratings, approximate footages and fittings etc. are shown on the plans. The electrical
contractor shall be responsible for routing the bus duct to coordinate with other trades. Final field
measurements shall be made by the contractor prior to release of the bus duct for fabrication by the
manufacturer.
◎ Voltage
◎ Current Ampere
◎ Conductor Material
◎ Insulation
◎ Housing Materials
◎ Phase & Wire
◎ Earthing
:
:
:
:
:
:
:
◎ IP Degree
◎ Reference Code
:
:
1000V
630A ~ 6000A (7500A for CU)
CU or AL
Class B (130℃) PET Film or Epoxy
Al (Extruded Aluminum)
1P3W, 3P3W, 3P4W
Housing Ground : +GE
Internal Earth :+50%E, +100%E
IP54(Standard) or IP65
1000V 2500A 3P4W+GE CU/AL-AL IP54
1000V 2500A 3P4W+50%E CU/AL-AL IP54
1000V 2500A 3P4W+100%E CU/AL-AL IP54
2.2.2 BUS BAR
A. The copper and aluminum bus bars shall be suitably plated at all joint and contact surface
area to insure good electrical contact and prevent corrosion in high-acting loads.
B. The plate shall be done by Tin for Copper and Silver for Aluminum bus bars at all joint and
contact surface.
C. The bus-bars shall be hard drawn electric copper with conductivity over 99% or aluminum
with conductivity over 60%
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
Sheet 4 of 8
D. The temperature rise at any point in the busway shall not exceed 55° C rise above ambient
temperature when operating at rated load current.
2.2.3 INSULATION
A. Entire length of all bus bars inside enclosure shall be insulated except at joint.
B. Each bus bar shall be insulated with Class B(130℃) degree by multi layers of Polyester film
or epoxy insulation.
2.2.4 HOUSING
A. The bus duct housing shall be totally enclosed non-ventilated type for protection against
mechanical damage and dust accumulation.
B. Each of the bus duct housing shall be constructed and joined completely electrical and
mechanical.
C. The busway housing shall be of extruded aluminum painted with polyester epoxy powder
paint to provide protection against corrosion.
D. Polyester epoxy powder paint shall be applied to by an automated electrostatic process.
E. Paint Color : _________
2.2.5 JOINT
A. The bus duct joint shall be of one bolt type joint with positive torque which utilizes a high
strength steel bolt and disc spring to maintain proper pressure over a large contact surface
area.
B. The blot shall be two-headed design to indicate when proper torque has been applied and
require only a standard long handle wrench to be properly activated.
C. It shall be possible to remove any joint connection assembly to allow electrical isolation or
physical removal of a busway length without disturbing adjacent busway lengths.
D. Access shall be required to only one side of the busway for tightening joint bolts.
E. Each joint kit shall allow approx.10mm adjustment in section length.
2.2.6 PLUG-IN BUSWAY
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
Sheet 5 of 8
A. Plug-in busway shall be identical to feeder construction and joint.
B.
On plug-in busway there shall be hinged cover type on each side and usable simultaneously.
C.
Plug in openings to be finger safe.
2.2.7 PLUG-IN UNIT
A. Plug-in unit shall be circuit breaker type or fusible switch type with visible blade and the
types and ratings shall be listed in Contract.
B. Plug-in unit shall be completely enclosed in a sheet steel housing
C. Switching device shall have positive quick-make, quick-break interrupter and interrupting
rating of circuit breaker plug-in unit shall be _____ RMS symmetrical amperes
D. Plug-in unit shall be mechanically interlocked with busway housing to prevent removal of
unit while the cover of plug-in unit is closed
2.2.8 IP RATING
The busway shall be certified IP 54 as standard for Indoor Splash Proof and IP65 for Outdoor by
special sealant treatment (feeder only).
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
PART 3.
Sheet 6 of 8
INSPECTION AND TESTING
3.1. TEMPERATURE RISE
The bus duct shall be conform to the temperature rise limit when carrying full rated current in its
poorest position as set forth in NEMA BU1, UL857. No part shall exceed a 55℃ temperature rise
base on average ambient temperature.
3.2. SHORT CIRCUIT STRENGTH
Short circuit rating of bus duct shall be determined according to UL857 and the bus duct shall
withstand the electrical, mechanical and thermal stress under fault condition. (Appendix #1)
3.3. VOLTAGE DROP
A. The voltage drop (input voltage minus output voltage) specified shall be based on the bus
duct operating at full rated current and at stabilized operating temperature at 25℃ ambient.
B. The three-phase, line-to-line voltage drop does not exceed 13 volts per one hundred meter at
70% power factor concentrated load, which may exist during motor.
3.4. INSULATION RESISTANCE TEST
The insulation resistance between conductors and conductor to metallic housing shall be measured
with D.C 500volt insulation resistance tester.
All measured values should be over 20 ㏁ at room temperature.
3.5. TEST OF DIELECTRIC PROPERTIES
The bus duct shall be capable of withstanding for one minute, without breakdown, the application of
AC 3000V, 50Hz potential between conductors and the enclosures.
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
PART 4.
Sheet 7 of 8
EXECUTION
4.1 AVAILABLE VENDORS AND COUNTRY OF ORIGINS
A. LS Cable Ltd., Korea..
4.2 INSTALLATION
A. Installation of bus duct and accessories shall be in accordance with manufacturer’s
instructions.
LS Cable Ltd. Korea
Bus Duct Business Team
Insulated bus duct for rated 630A through 6000A
Sheet 8 of 8
Appendix #1
Short Circuit Ratings of Phase to Phase (kA)
Amp.
Rates
630
800
1000
1250
1600
2000
2500
3200
4000
5000
6000
7000
LS Cable Ltd. Korea
Copper
1 Sec
36
36
51
65
95
129
150
191
200
200
200
200
3 Sec
21
21
29
37
55
75
107
110
149
200
200
200
Aluminum
1 Sec
3 Sec
24
14
42
24
50
29
51
36
95
55
121
70
132
76
169
97
200
140
200
150
200
150
Bus Duct Business Team