Open-Air Substation Capacitor Bank

Property Specification

Type: Open-Air Substation Capacitor Bank / VAR Compensation Unit

Features: Tailored engineered-to-order reactive power bank offering seamless grid installation, network power factor optimization, and energy loss reduction. Protection configurations include internally fused options, unfused models (available in standard, heavy, or extreme duty ratings), and externally fused designs paired with current-limiting or expulsion fuses per element. Compact relay-protected fuseless arrangements utilizing series string topologies are also supported. The structural design features a durable, lightweight welded aluminum mounting rack (with optional steel construction), built-in frame lifting eyes for simple rigging, station-grade bus insulators, and support for flexible horizontal or vertical unit mounting orientations.

Description

System Technical Specifications & Structural Parameters

Technical Parameter / Feature Category Specification / Operational Range
Protection Architecture

• Externally Fused

• Fuseless / Unfused

• Internally Fused

Grid Connection Scheme

• Ungrounded Star (Wye)

• Grounded Star (Wye)

• Delta

• Single-Phase

Bank Structural Configuration

• Single Wye

• Double Wye

• “H” Bridge

• Differential Topology

Individual Capacitor Unit Rating

• 50 – 700 kVAR (External Fuse)

• 50 – 1000 kVAR (Fuseless)

• 200 – 1200 kVAR (Internal Fuse)

Basic Impulse Insulation Level (BIL) 75 – 200 kV
Capacitor Count Per Rack 4 – 36 units (standard configuration)
Operating Line-to-Line Voltage Up to 800 kV
Total Bank Reactive Power Output 1 – 100 MVAR (typical range)
Structural Frame Material 6061-T6 Aluminum (Galvanized Steel option available)
Elevating Substructure 6061-T6 Aluminum (Galvanized Steel option available)