QMT-B MV-Switchgear
MV-Switchgear
QMT-B Metal-Clad Medium Voltage Switchgear
| Application: | indoor, power distribution (protection, disconnection, measurement, …) |
| Rated frequency: | 50 – 60 Hz |
| Protection class: | IP 4X (higher protection on request), IP 20 with open door |
| Ambient temperature: | -5 °C to +40 °C |
| Rated humidity: | 90% at 20 °C |
| Arc lightning test: | annex “C” IEC EN 62271-200 |
| Certificates: | IEC EN 62271-200, IEC EN 61439-1, IEC EN 61439-2, IEC EN 60529, CEI 0-16 |
Executions
| Rated voltage | 12 kV | 17,5 kV | 24 kV |
| Rated insulation voltage | 12 kV | 17,5 kV | 24 kV |
| Rated withstand voltage (1 min) | 28 kV | 38 kV | 50 kV |
| Rated impulse withstand voltage | 75 kV | 95 kV | 125 kV |
| Rated short time withstand current (3 s) | 50 kA | 50 kA | 31,5 kA |
| Internal arc withstand current (1 s) | 50 kA | 50 kA | 31,5 kA |
| Main rated busbar current | 3150 A | 3150 A | 3150 A |
| Arc lightning test | LSC2B-PM | LSC2B-PM | LSC2B-PM |
Characteristics
- extreme modularity and compact structure
- withdrawable circuit breaker compartment
- mechanical interlocks for safe procedures
- having a possible air or SF6 insulation
- having internal arc proof
- guarantee service continuity and maximum safety
- an easy inspection and maintenance
- metal encapsulated, air insulated and type tested
- complete partitioning between the busbar compartments of neighboring cubicles and the busbar
- withdrawable unit and cable connection compartments
- designed for arc fault protection
- suitable for monitoring an external automation system that can be managed by individual devices
- main busbar compartment
=> in the upper part of the control cabinet, separated from other units - disconnetor and circuit breaker compartment
=> contains the vacuum LS with air, vacuum and compressed air connection or SF6 gas insulation
=> control functions for switch-disconnectors and earthing switches on the front of the cubicles
=> all departments of all fields include slide-in technology - cable compartment
=> in the lower part of the switchgear, protected by an interlocked door - 3 auxiliary circuit compartments
=> located above the switch-disconnector compartment
=> measuring instruments, protection relays, fuses, low voltage switches, transformer
Depending on the version with/without arc fault protection, air or SF6 insulation, size and types of withdrawable units
