Frequency switchgear SLVA

three-phaseAClow-voltage

Product description
SLVA switchgear is a State Grid standardized indoor low-voltage switchgear designed for three-phase AC 50 Hz systems. It has a rated insulation voltage of 690 V, rated operational voltage of 400 V, rated current range 1600–2500 A and short-circuit breaking capacity of 50–65 kA. The cabinet uses a fixed-segregated modular structure with a compact layout to accommodate multiple functional units in a small footprint. It is suitable for power plants, substations, industrial and mining enterprises, commercial buildings and municipal projects for power distribution, motor control and reactive power compensation.

Main technical parameters

• Horizontal busbar rated current: 1250 / 2000 / 2500 A
• Horizontal busbar short-time withstand current: ≥35 / ＞50 / ≥65 kA
• Vertical busbar rated current: 1250 / 1600 A
• Vertical busbar short-time withstand current: ≥35 / ≥40 kA
• Power-frequency withstand voltage: main circuit (main switch and horizontal busbar) phase-to-phase and phase-to-earth 2.2 kV (no breakdown/flashover); auxiliary circuits connected to main circuit 1.89 kV (no breakdown/flashover); insulated parts and metal-foil wrapped insulating handles to live parts 2.835 kV (no breakdown/flashover)
• Electrical clearance: main circuit (including main switch and frame circuit-breaker) ≥14 mm (corresponding to Uimp = 12 kV); molded-case circuit-breaker ≥8 mm (Uimp = 8 kV); other auxiliary control circuits ≥1.5 mm
• Creepage distance: main circuit (including main switch and frame circuit-breaker) ≥16 mm (corresponding to Uimp = 1000 V); molded-case circuit-breaker ≥12.5 mm (Uimp = 800 V); other auxiliary control circuits ≥4 mm
• Protection degree: cabinet IP4X, ventilation openings IP3XD, top of cabinet IP3X
• Insulation resistance: >10 MΩ
• Grounding resistance: instrument door to main grounding point ≤100 MΩ, front door to main grounding point ≤100 MΩ, circuit-breaker mounting bracket to main grounding point ≤100 MΩ, rear door to main grounding point ≤100 MΩ, terminal strip mounting bracket to main grounding point ≤100 MΩ
• Overall dimensions (W × D × H, without doors): Shanghai compact 500 × 800 × 2200 mm; Shanghai general 900 × 800 × 2200 mm; State Grid compact 700/900 × 800 × 2200 mm; State Grid general 800/1000 × 800 × 2200 mm

Features / Technical specifications

• Designed for three-phase AC 50 Hz systems
• Rated insulation voltage: 690 V; rated operational voltage: 400 V
• Rated current range: 1600 A–2500 A
• Short-circuit breaking capability: 50 kA–65 kA
• Modular, fixed-segregated structure for high space utilization
• Applicable environments: power plants, substations, industrial enterprises, commercial buildings, municipal distribution systems
• Multiple busbar and withstand current/voltage ratings to meet regional and standard requirements