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- HOLDONE 33KV Ring6 RMU
- 33 kV
- Up to 630 A
- 50/60 Hz
Introduction
HOLDONE’s 33KV Ring6 Ring Main Unit (RMU) is an advanced, modular switchgear system designed to manage and distribute electrical power with enhanced safety and efficiency in medium to high voltage networks. Optimized for 33KV applications, it is equipped with a range of modules, including switch disconnector (C-module), earthing switch (F-module), switch-fuse disconnector (v-module), downstream earthing switch, and a vacuum circuit-breaker, to ensure flexibility and reliability in operation.
Specification
| Feature | Specification (C-module) | Specification (F-module) | Specification (V-module) |
| Rated Voltage (kV) | 36/40.5 | 36/40.5 | 36/40.5 |
| Power Frequency Withstand Voltage (kV) | 70/95 | 70/95 | 70/95 |
| Lightning Impulse Withstand Voltage (kV) | 170/185 | 170/185 | 170/185 |
| Rated Normal Current (A) | 630 | – | 200 |
| Breaking Capacities: | |||
| Active Load (A) | 630 | – | 200 |
| Closed Loop (A) | 630 | – | 200 |
| Offload Cable Charging (A) | 20/21 | – | 50 (Class C1) |
| Earth Fault (A) | 60/63 | – | – |
| Making Capacity (kA) | 50/50 | 50/50 | See note 3) |
| Short-time Current (1 sec) (kA) | 16/16 | 16/16 | 1/1 |
| Short-time Current (3 sec) (kA) | 20/20 | 20/20 | 20/20 |
| Internal Arc Classification (IAC) A FL, 1s (kA) | 20/20 | 20/20 | 20/20 |
Key Features
High Voltage Operation: Engineered for rated voltages of 36/40.5 kV, suitable for a range of electrical distribution requirements.
Robust Insulation: Power frequency withstand voltage of 70/95 kV and a lightning impulse withstand voltage of 170/185 kV, providing superior insulation and safety.
Durable Construction: Withstand voltages across the disconnector are 80/110 kV for power frequency and 195/215 kV for lightning impulses, reflecting a strong build for enduring harsh conditions.
Versatile Current Management: Capable of handling rated normal currents of up to 630 A with comprehensive breaking capacities for active loads, closed loops, and cable charging.