Speedfax 2017

Medium-voltage Equipment
38 kV Gas-Insulated Metal-Clad Switchgear General/Specifications
Gas-Insulated Switchgear
Types 8DA10 and 8DB10 mediumvoltage,
gas-insulated switchgear are gasinsulated,
vacuum circuit breaker designs
with a voltage range of 4.16 kV to 38 kV.
Lightning impulse withstand voltage
ratings up to 200 kV BIL and interrupting
ratings up to 40 kA are available.
The types 8DA10 and 8DB10 mediumvoltage,
gas-insulated switchgear designs
feature fixed-mounted, vacuum circuit
breakers, connectable to the main bus
through three-position (closed-open-ready
to ground) switches. The position of the
switches is externally observable from
the front of the unit using a convenient
camera system. Medium-voltage, gasinsulated
switchgear is suitable for
systems where small size, arc resistance,
environmental immunity or reduced
maintenance needs are important.
Depending upon the voltage rating,
medium-voltage, gas-insulated switchgear
is approximately 1/5th the size of
conventional air-insulated switchgear.
Features include:
n Tested for arc-resistance to IEEE
C37.20.7-2007, type 2A
n Significantly reduced PPE needs
n Compact – up to 80% smaller
than air-insulated switchgear
n 20-year internal maintenance
cycle
n Meets IEEE and IEC standards
n UL or C-UL Listing available
n Single-phase design eliminates
phase-to-phase faults
n Meets NEC visible disconnect
requirement
n Well suited for contaminated
environments
n Pair with Siemens protective
relays to match any application.
14 SWITCHGEAR
Rated Values
Maximum Design Voltage kV 15 27 38 42*
Frequency Hz 60 60 60 60
Power-Frequency Withstand Voltage (1 min.) kV rms 36 60 80 80
Lightning Impulse Withstand Voltage kV peak 95 125 170; 200* 185; 200*
Short-Circuit Interrupting Current kA 40 40 40 40
Short-Time Withstand Current, 3 s kA 40 40 40 40
Short-Circuit Making Current (close and latch) kA peak 104 104 104 104
Peak Withstand Current kA peak 104 104 104 104
Continuous Current of Main Bus A 4,000 4,000 4,000 4,000
Continuous Current of Circuit Breakers A 2,500 2,500 2,500 2,500
* On request. Consult factory
Type 8DA dimensions in inches (mm)
Type 8DB dimensions in inches (mm)
73
(1,850)
47.2
(1,200)
82.7
(2,100)
47.2
(1,200)
106.3
(2,700)
106.3
(2,700)
59
(1,500)
59
(1,500)
23.6
(600)
64
(1,625)
23.6
(600)
105
(2,665)
Front view
Side view
Front view
Side view
Siemens Industry, Inc. SPEEDFAX Product Catalog 14-19