HD4/R MV SF6 circuit-breakers for secondary distribution PPMV – Product Management.

HD4/RMV SF6 circuit-breakersfor secondary distribution

PPMV – Product Management

HD4/RCore technology

Month DD, Year | Slide 2© ABB Group

Upper terminal

Lower terminal

Epoxy resin cylinder

Moving arcing contact

Blasting nozzlesFixed contact

Moving contact

Insulating tie-rod

Anti-explosion valve

Fixed arcing contact

HD4/RQuenching technique – SF6 Autopuffer

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Circuit breaker closed

Circuit breaker open

Moving contactseparation

Arcing contactseparation

(1) (2) (3) (4)

1. Protection relay (accessory)

2. Shaft seat for charging the closing springs

3. Closing pushbutton

4. Opening pushbutton

5. Charged/discharged closing spring indicator (accessory)

6. CB contacts status (open/closed)

7. SF6 pressure status locking and signalling device (accessory)

8. MV terminals

9. Current transformers/sensors (accessory)

10. Epoxy resing poles with assembled SF6 auto-puffer

11. Key lock in open position

HD4/RMain components

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Self-supplied relay Not self-supplied relay

Apparatus

Relay

PR 521 REF 601 IECREF 601 CEI 0-16

Current sensors

Current transformer- 40/1A- 80/1A- 250/1A- 1250/1A

Current sensors

HD4/R with shunt opening release

HD4/RIntegrated solution

Month DD, Year | Slide 5© ABB Group

HD4/RWide range of accessories

Month DD, Year | Slide 6© ABB Group

- Shunt opening release - Auxiliary contacts (5 to 12)- Key lock in open position- Additional shunt opening release- Opening solenoid (PR521)- Shunt closing release- Motor charger of closing spring- Thermal relay for protecting motor charger- Undervoltage shunt opening release- Charged/discharged spring signalling contact- Pushbutton protection- Padlock- Wheels- Two-level pressure switch- Three-level pressure lamps- Locking device for insufficient SF6 pressure

HD4/RReliability and flexibility

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Reliability

- 10.000 Close-open operations

- Maintenance-free

- SF6 auto-puffer technology ideal for critical loads• No current chopping• No restrike• Reduced overvoltage

Flexibility

- Wide range of accessories

- Possibility to have relays and CTs on board

- Interchangeable with VD4/R

SF6 circuit breaker for secondary distribution AIS

On board relay and CTs/sensors

Interchangeable with VD4/R

Command able to do fast operation cycle:O-0.3s-CO-15s-CO

HD4/RSF6 circuit breaker

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Rated Voltage [kV] 12 17.5 24 36

Rated Current [A] 1250

Short time current [kA] 25 (3s) 20 (3s) 16 (3s)

Mechanical class M2

Electrical class E2, C2

SF6 circuit breaker for secondary distribution AIS

On board relay and CTs/sensors

Interchangeable with VD4/R and HD4/R

optimized and compact

HD4/RESF6 circuit breaker optimized

Month DD, Year | Slide 9© ABB Group

Rated Voltage [kV] 12 17.5 24

Rated Current [A] 630

Short time current [kA] 16 (1s)

Mechanical class M1

Electrical class E1