- Description and features
- Technical data
- Service Conditions
KZO-205 type switchgear cubicles are components of air-insulated switchgear (AIS) sections.
The KZO-205 cubicles feature a metal-enclosed design and withdrawable functional units for safe and convenient operation.
The KZO-205 cubicles can be installed either in permanent buildings or in prefabricated modular-type enclosures (SMB type), depending on the project requirements.
Features
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The circuit breaker is mounted on a withdrawable truck, providing convenient access and safe operation.
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The enclosure is made of hot-dip galvanized steel, ensuring high corrosion resistance.
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All insulators used in the cubicle are made of composite epoxy-resin ceramic.
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The withdrawable element can occupy three distinct positions within the enclosure: service, test, and disconnected.
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The design includes a full set of mechanical and electrical interlocks to ensure operator safety, namely:
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Interlock preventing movement of the circuit breaker from the service to the test position (and vice versa) when the breaker is in the ON position.
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Interlock preventing closing of the circuit breaker when the withdrawable unit is in any intermediate position between service and test.
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Interlock preventing racking-in of the withdrawable unit from test to service position when the earthing switch is closed.
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Interlock preventing closing of the earthing switch when the withdrawable unit is in service or intermediate position (i.e. possible only in test position).
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Interlock preventing opening of the cable compartment door unless the earthing switch is closed.
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| Parameter | Value |
|---|---|
| Rated voltage, kV | 6; 10 |
| Maximum operating voltage, kV | 7.2; 12 |
| Rated current of outgoing feeder, A | 400; 630; 1000 |
| Short-time withstand current, kA (3 s): | |
| – with VB-4P vacuum circuit breaker “AVM AMPER” | 20; 31.5 |
| – with VNA load break switch “AVM AMPER” | 16; 20 |
| Peak withstand current, kA: | |
| – with VB4-S vacuum circuit breaker “AVM AMPER” | 51; 80 |
| – with VNA load break switch “AVM AMPER” | 41; 51 |
| Rated control voltage, V: | |
| – DC supply | 110; 220 |
| – AC supply | 110; 220 |
| Insulation level according to IEC 60071-1:2019 | Normal |
| Type of outgoing HV connections | Cable or busbar |
| Service access | Single-sided |
| Drive mechanism for circuit breaker / voltage transformer / sectional disconnector | Manual |
| Earthing switch operating mechanism | Manual |
| Degree of protection (IEC 60529 / EN 60529:2018) | IP20 |
| Circuit breaker type: | |
| – Vacuum circuit breaker | VB4-S “ABM AMPER”
VB4-SB “ABM AMPER” |
| – Load break switch | VNA “ABM AMPER” |
| Current transformer type | TOLA-10 “Amper-Intra” |
| Voltage transformer type | NTMI, NAMI, VTS “KBP Intra”, ZNOLP |
| Auxiliary transformer type | TMG-2; TS-25; TS-40; TS-63 |
| Surge arrester type | OPNP “Slavenergoprom” |
| Contactor type | V7, V12 “ABB” |
| Overall dimensions (W×D×H), mm | 800 × 850 × 2100 |
| Weight, kg | 250 – 480 |
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Altitude above sea level: not exceeding 1000 m
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Ambient air: non-explosive, free of conductive dust, and without aggressive gases or vapors in concentrations harmful to metals or insulation materials.