Requirements

Each requirement is a statement taken from a controlled document revision, with the exact span it came from. A requirement with no resolvable anchor cannot be baselined.

SRS section 8.3, requirement intelligence and traceability

Requirements

Critical

Drive the G1 requirement baseline and the FAT scope.

Below L2

Not yet reviewed by a person.

Anchored to a source

12 of 12

Requirement register

Reference	Statement	Attribute	Criticality	Trust
SPC 3.1	All assemblies shall be design verified and shall comply with IEC 61439-2 in full.	Governing assembly standard	Critical	L4
SPC 3.2 a	The main busbar system shall be rated 400 V, three phase, four wire, 50 Hz.	Rated operational voltage (Ue)	Critical	L4
SPC 3.2 b	The rated current of the main horizontal busbar shall be not less than 4000 A continuous.	Rated current of the main busbar (InA)	Critical	L3
SPC 3.2 c	Each assembly shall withstand a short circuit of 65 kA for 1 s.	Rated short-time withstand current (Icw)	Critical	L4
SPC 3.3 a	Internal separation shall be Form 4b throughout.	Form of internal separation	High	L4
SPC 3.4 a	The degree of protection shall be IP54 with all doors closed and all cable entries sealed.	Degree of protection (IP)	High	L4
SPC 3.4 b	Cable entry shall be from the bottom throughout the switchroom.	Cable entry direction	High	L4
SPC 3.5	Each assembly shall provide a Modbus TCP interface for metering, breaker status and trip annunciation.	Communication protocol	High	L4
SPC 3.6	The design ambient temperature shall be 65 C.	Maximum ambient temperature	High	L1
SPC 3.7	The assembly shall provide adequate protection for operating personnel in the event of an internal arcing fault.	Internal arc classification	Critical	L1
SPC 3.3 b	Busbars shall be electrolytic grade copper, silver plated at every bolted joint.	Busbar material	High	L4
SPC 3.4 c	The system earthing arrangement is TN-S with a full rated neutral busbar.	System earthing arrangement	High	L4

SPC 3.1 detail

Select a row to inspect its provenance and the canonical value that answers it.

Identifier: REQ-2026-0045-0001
Status: approved
Criticality: Critical
Verification method: Inspection
Trust state: L4Canonical
Attribute: Governing assembly standard
Canonical value: IEC61439-2
Source document: GSPE-P26045-01-E-SPC-001

Decomposition

One tender sentence usually carries several obligations. Held as one record it can only be wholly satisfied or wholly failed, which is where a compliance matrix goes vague.

Only one fragment binds to an ontology attribute, so the statement is already atomic in practice.

Source evidence

The exact span in the document revision the requirement was taken from.

Characters 378 to 415 of REV-SPC-002.

GSPE-P26045-01-E-SPC-001  TECHNICAL SPECIFICATION
LOW VOLTAGE SWITCHGEAR AND CONTROLGEAR ASSEMBLIES
Nusantara Nickel Smelter, E-House Package

SECTION 3 - ELECTRICAL DESIGN BASIS

3.1 General
The Contractor shall design, manufacture, factory test and deliver low voltage
switchgear and controlgear assemblies for the E-House package. All assemblies shall be
design verified and shall comply with IEC 61439-2 in full. No partial compliance will be
accepted.

3.2 Ratings
The main busbar system shall be rated 400 V, three phase, four wire, 50 Hz. The rated
current of the main horizontal busbar shall be not less than 4000 A continuous at the
design ambient stated in clause 3.6. Each assembly shall withstand a short circuit of
65 kA for 1 s without damage or displacement of the busbar supports.

3.3 Construction
Internal separation shall be Form 4b throughout. Busbars shall be electrolytic grade
copper, silver plated at every bolted joint. The enclosure shall be fabricated from
2.0 mm mild steel sheet and finished in RAL 7035 semi gloss powder coat. Assemblies
shall be floor standing on a fabricated plinth.

3.4 Protection and Environment
The degree of protection shall be IP54 with all doors closed and all cable entries
sealed. Cable entry shall be from the bottom throughout the switchroom. The system
earthing arrangement is TN-S and a full rated neutral busbar shall be provided
throughout.

3.5 Control and Monitoring
Each assembly shall provide a Modbus TCP interface to the plant control system for
electrical metering, breaker status and trip annunciation. The register map shall be
agreed with the Employer during detail design.

3.6 Site Conditions
The design ambient temperature shall be 65 C. Relative humidity shall be taken as
95 percent non condensing. Site elevation above sea level is to be confirmed by the
Employer at a later date.

3.7 Internal Arc
The assembly shall provide adequate protection for operating personnel in the event of
an internal arcing fault. The classification and the accessibility type shall be as
agreed between the parties during detail design.