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

2. HD4/R Core technology Upper terminal Fixed contact Blasting nozzles
Fixed arcing contact
Moving arcing contact
Moving contact
Lower terminal
Insulating tie-rod
Epoxy resin cylinder
Anti-explosion valve
© ABB Group
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3. Quenching technique – SF6 Autopuffer
HD4/R
Quenching technique – SF6 Autopuffer
(1)
(2)
(3)
(4)
Circuit breaker
closed
Moving contact
separation
Arcing contact
separation
Circuit breaker
open
© ABB Group
Month DD, Year

4. HD4/R Main components Protection relay (accessory)
Shaft seat for charging the closing springs
Closing pushbutton
Opening pushbutton
Charged/discharged closing spring indicator (accessory)
CB contacts status (open/closed)
SF6 pressure status locking and signalling device (accessory)
MV terminals
Current transformers/sensors (accessory)
Epoxy resing poles with assembled SF6 auto-puffer
Key lock in open position
© ABB Group
Month DD, Year

5. HD4/R
Integrated solution
© ABB Group
Month DD, Year

6. Wide range of accessories
HD4/R
Wide range of accessories
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
Audioscript: HySec has the possibility to be equipped with a wide range of accessories, both for the circuit breaker part and the disconnector and earthing switch part.
© ABB Group
Month DD, Year

7. Reliability and flexibility
HD4/R
Reliability and flexibility
Reliability
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
© ABB Group
Month DD, Year

8. HD4/R SF6 circuit breaker Rated Voltage [kV] Rated Current [A]
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
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
Audioscript: HySec is the first ABB multifunction apparatus integrating the functions of vacuum circuit breaker, SF6 line disconnector and SF6 earthing switch.
Audioscript_1: Its rated voltage is up to 24 kV, while its rated current is up to 600 A. Its breaking capacity is up to 16 kA, which is also its short time current withstand capability for 1 second.
Audioscript_2: HySec is able to perform mechanical close-open operations. Its electrical life is classified as E2 and, up to 400 A, C2 for back to back capacitor switching.
Audioscript_3: HySec is also able to perform the fast operation cycle.
© ABB Group
Month DD, Year

9. SF6 circuit breaker optimized
HD4/RE
SF6 circuit breaker optimized
SF6 circuit breaker for secondary distribution AIS
On board relay and CTs/sensors
Interchangeable with VD4/R and HD4/R
optimized and compact
Rated Voltage [kV] 12
17.5 24
Rated Current [A]
630
Short time current [kA]
16 (1s)
Mechanical class M1
Electrical class E1
Audioscript: HySec is the first ABB multifunction apparatus integrating the functions of vacuum circuit breaker, SF6 line disconnector and SF6 earthing switch.
Audioscript_1: Its rated voltage is up to 24 kV, while its rated current is up to 600 A. Its breaking capacity is up to 16 kA, which is also its short time current withstand capability for 1 second.
Audioscript_2: HySec is able to perform mechanical close-open operations. Its electrical life is classified as E2 and, up to 400 A, C2 for back to back capacitor switching.
Audioscript_3: HySec is also able to perform the fast operation cycle.
© ABB Group
Month DD, Year