Checklist to be Completed with Submission – Surface Mounted Fuse Combination Unit and Switch Disconnector
The following tables must be completed by the applicant and submitted during application.
A. Supporting Documents Required :
Compliance
Items Documents
(Yes/No)
1. Company code of ethics of the Supplier
2. Company organization chart, Form AR1 and/or Business Registration Certificate of the Supplier
3. Certified agency agreement or other Manufacture’s authorization document showing his authorization for the
Supplier to serve as his local agent
4. Letter from Manufacturer showing the Manufacturer’s name, plant address (must be accompanied by a location map
and street map and VCD or digital photos showing the outlook of the manufacturer’s plant), products being
produced, country/place of manufacture, name of contact person, telephone no., fax no. and email address etc. The
documents must be authenticated by appropriate authorities or trade commission of the exporting country.
5. Brochure/catalogue/shop drawings of the materials.
6. Test certificate or other certificates/reports as required showing the material’s compliance with the standard
specification (certificates shall be in English or Chinese or English/Chinese translation issued by certification bodies
or by approved independent translation agency).
7. Document showing the name of the accredited laboratory that conduct the tests.
8. Job references showing the projects (either public or private) which have used the materials (for detailed
requirement on local job reference, refer to table “C” of this Checklist).
May 2003 (Page 1 of 7)
B. Compliance of Specifications :
Clause No. Compliance
Description Manufacturer’s Offer
ELE (Yes/No)
3.2.1.010.3 Surface mounted switch-disconnector fuses, fuse-switch disconnectors and
switch-disconnectors shall be air-break, metalclad type and shall comply
with BSEN 60947-1 : 1992 and BSEN 60947-3 : 1992.
3.2.1.020.3 The switch-disconnector fuses or fuse-switch disconnectors shall be a
combination of a switch-disconnector and one or more fuses in a composite
unit.
3.2.1.030.3 a. Rated operational voltage: 380/220V(Min.)
b. Rated frequency: 50HZ
c. Rated insulation voltage: 415V
d. Rated impulse withstand voltage: 6kV (min.)
e. Conventional enclosed thermal current and rated operational
current/power for uninterrupted duty
f. Utilization category: AC22B and AC23B.
g. Rated short-time withstand current : At least twelve times the
maximum rated operational current for one second.
h. Rated short-time making capacity.
May 2003 (Page 2 of 7)
Clause No. Compliance
Description Manufacturer’s Offer
ELE (Yes/No)
i. Rated short-circuit current (for switch-disconnectors protected by fuses
to BSEN 60269-1:1994, BSEN 60269-2:1995 BS 88 : Part 2 :
Section 2.2 : 1988 and for switch-disconnector fuses / fuse-switch
disconnectors): 40kA
3.2.2.010.3 Switch-disconnector fuses, fuse-switch disconnectors and
switch-disconnectors shall be type-tested in accordance with clause 8.2 and
clause 8.3 of BSEN 60947-3 : 1992. For switch-disconnectors to be used
in circuits protected by fuses, test sequence III of clause 8.3.5 is not
required, but test sequence IV of clause 8.3.6 shall be performed to such
switch-disconnectors connected in series with BSEN 60269-1 : 1994,
BSEN 60269-2 : 1995 and BS 88 : Part 2 : Section 2.2 : 1988 fuse links of
the corresponding rated maximum current.
3.2.2.020.A The following test sequences of BSEN 60947-3 : 1992 shall be carried out
by an Independent Short Circuit Testing Organisation.
a. For fuse combination units – test sequences I & IV
b. For switch - disconnectors – test sequences I & III
3.2.2.030.3 For switching devices with electrolytically deposited silver contacts, the
temperature-rise requirement for the contact parts shall comply with the
limit as specified in Table II of BSEN 60947-1 : 1992.
3.2.2.040.3 Type-test for switch-disconnectors may be waived if they are converted
from type-tested switch-disconnector fuses/fuse-switch disconnectors by
replacing the fuse links with copper short links for a rated operational
May 2003 (Page 3 of 7)
Clause No. Compliance
Description Manufacturer’s Offer
ELE (Yes/No)
current not greater than the maximum rated operational current for the
original switch-disconnector fuses/fuse-switch disconnectors and are
installed in circuits protected by fuses to BSEN 60269-1 : 1994, BSEN
60269-2 : 1995 and BS 88 : Part 2 : Section 2.2 : 1988.
3.2.3.010.3 Switch-disconnector fuses, fuse-switch disconnectors and
switch-disconnectors shall be triple or single pole with detachable fully
rated front accessible neutral link.
3.2.3.020.A For fuse combination units with current ratings above 100A, the switching
devices shall make and break on both the incoming supply side and the
outgoing load side.
3.2.3.030.A For fuse combination units with current ratings of 100A and below, fuse
bases and carriers shall be provided for housing the fuse links if the
switching device are not making and breaking on both the incoming supply
side and the outgoing load side.
3.2.3.040.3 The current carrying parts shall be made of hard drawn, high conductivity
copper to BS 1432 : 1987 or BS 1433 : 1970.
3.2.3.050.3 The enclosure shall be made of sheet steel of thickness not less than 1.6
mm for current ratings above 32A and not less than 1.2 mm for 32A and
below, complete with stoved epoxy powder paint, or equal and Approved
finish of a gloss light colour.
3.2.3.060.3 The front cover of switching devices shall be hinged or of an equal and
Approved construction, to enable easy access to the interior for
May 2003 (Page 4 of 7)
Clause No. Compliance
Description Manufacturer’s Offer
ELE (Yes/No)
replacement of fuse links. Gland plates shall be provided for top and
bottom cable entry for switching devices of current ratings above 32A.
3.2.3.070.3 a. Under normal service conditions, the enclosure shall be of totally
enclosed type with a degree of protection against ingress of foreign
solid bodies and liquids of at least IP41 as per BSEN 60529 : 1992 for
the top surface and IP31 for the other surfaces of the enclosures. With
the front hinged door open and in replacing fuse links, the degree of
protection to the live parts shall be at least IP2X;
b. The switching devices shall be suitable for installation under
environmental condition of pollution degree 3 unless otherwise
specified.
3.2.3.080.3 a. Terminal connections shall be by means of screws so to ensure that the
necessary contact pressure is maintained;
b. The terminal enclosure shall have sufficient space for accommodating
cable lugs for the largest cables which the switching device is designed
to receive, and also for proper cable termination with cable bending
radius in accordance with the COP of the Electricity (Wiring)
Regulations, otherwise proper extension cable terminals and/or cable
boxes shall be provided. The palm width of the cable lugs shall
comply with BS 91 : 1973 Table 2.
3.2.3.090.3 For switch-disconnector fuses or fuse-switch disconnectors, the fuse
holders shall be capable of accepting any fuse links of physical dimension
May 2003 (Page 5 of 7)
Clause No. Compliance
Description Manufacturer’s Offer
ELE (Yes/No)
complying with the minimum and maximum limits of the respective fuse
reference tabulated in the Specification for Fuses.
3.2.3.100.3 An external accessible earthing terminal shall be provided at the side panel
of the enclosure.
3.2.4.010.3 The switching devices shall be independent manual operated and shall have
mechanical interlock to prevent access to the interior except when the
switching devices are in the “OFF” position, and to prevent the contacts
from being switched to close when the door is open.
3.2.4.020.3 The latter interlock shall be able to be defeated by trained personnel for
maintenance when necessary.
3.2.4.030.3 A facility shall be provided for padlocking the switching devices in the
“OFF” position.
May 2003 (Page 6 of 7)
C. Particulars of Local Job Reference :
Compliance
Items Documents
(Yes/No)
1. Local job reference:
2. Details of local job recommended for site visit and inspection by HA (at least one): -
a. Project name:
b. Client/Consultant:
c. Contractor:
d. Scope of work:
e. Completion date:
May 2003 (Page 7 of 7)