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China SRM6-12 Fully Insulated Gas-Insulated Ring Main Unit - Reliable Suppliers and Factory Solutions
Model and Definitions
For example:
SRM6-12-C/630DL indicates a load switch cabinet with a nominal voltage of 12kV, rated current of 630A, right-side expansion, and left-side cable entry and exit method.
SRM6-12-CF/6301R signifies a combination unit formed by a load switch cabinet and a fuse combination cabinet. It has a bus voltage of 12kV and a bus current of 630A, with left-side expansion and right-side cable entry and exit method.
Performance Indexes
| Unit Code | Definition | Unit Code | Definition | ||
| C | Standard Single Set Load Switch Unit | - | Busbar Top Insulator | ||
| F | Load Switch-Fuse Composite Apparatus Unit | SL | Bus Coupler Unit | ||
| V | Circuit Breaker Unit | M | Measurement Unit | ||
| D | Cable Entry Unit (Without Switch) | PT | PT UNIT | ||
| + | Busbar Side lnsulator | 1K2(4) | Load Switch Unit with Double Insulator | ||
Technical Specifications
| Model | C Module | F Module | V Module | CB Module | ||
| Compound Switch | Composite Apparatus | Vacuum Switch | Isolation/ Earthing Switch | Vacuum Breaker | Isolation/ Earthing Switch | |
| Nominal Voltage (KV) | 12 | 12 | 12 | 12 | 12 | 12 |
| Rated Frequency (Hz) | 50 | 50 | 50 | 50 | 50 | 50 |
| Power Frequency Withstand Voltage (Interphase/Terminal) (KV) | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 |
| Lighting lmpulse Withstand Voltage (kV) | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 |
| Rated Currency (A) | 630 | Note ¹ | 630 | 1250/630 | ||
| Rated Closed Loop Breaking Current (A) | 630 | |||||
| Rated Cable Charge Breaking Current (A) | 135/135 | |||||
| Rated Circuit Making Current (Peak) (A) | 50 | 80 | ||||
| Rated Peak Withstand Current (kA) | 50 | |||||
| Rated Short-time Withstand Current (kA/3s) | 20 | |||||
| Rated Short-circuit Breaking Current (kA) | 31.5 | 20 | 25 | |||
| Rated Transfer Current (A) | 1750 | |||||
| Maximum Current for Compatible Fuses (A) | 125 | |||||
| Loop Resistance (Ω) | ≤ 300 | ≤ 600 | ||||
| Machinery Service Life (Time) | 5000 | 3000 | 5000 | 2000 | 5000 | 5000 |
Note: 1) It depends on the current rating of the fuse.
SRM 6 - 1 2 Gas-Insulated Switchgear Structure and Dimensions
Frequently Asked Questions
Q What does SRM6-12-C/630DL represent?
It indicates a load switch cabinet with a nominal voltage of 12kV, rated current of 630A, right-side expansion, and left-side cable entry and exit method.
Q What is the meaning of Unit Code F in the Performance Index?
Unit Code F signifies the Load Switch-Fuse Composite Apparatus Unit.
Q What is the nominal voltage and rated frequency of the SRM6-12 modules?
All modules (C, F, V, and CB Modules) operate under a nominal voltage of 12 kV and a rated frequency of 50 Hz.
Q What is the machinery service life of the C Module and V Module?
Both the C Module (Compound Switch) and the V Module (Vacuum Switch) have a machinery service life of 5000 times.
Q What determines the rated current of the F Module?
The rated current of the F Module (Composite Apparatus) depends on the specific current rating of the fuse being used.