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36kV
72.5kV
145kV

Dry Air Insulated Dead Tank Vacuum Circuit Breaker

Available in 36, 72.5 and 145kV
245kV coming soon!

Meiden’s dead tank vacuum circuit breakers (VCB) are engineered with the climate in mind; dry air is the insulating medium, eliminating the need for potent SF6 or other greenhouse gases.

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Product Features


Meiden’s dead tank vacuum circuit breakers are the optimal switching equipment for the green grid. These breakers utilize dry air as an insulating medium in place of SF6, a potent greenhouse gas. Sustainably designed and emissions-free, these high-performance VCBs are capable of approximately five times more mechanical operations and four times more interruptions of rated breaking current than standard gas-insulated circuit breakers.

With the founding of Meiden America Switchgear (MAS) in Greenville, South Carolina, Meiden’s DT VCB products will now be assembled in the United States!

Specifications

Model and rating

Model

NVBOA-
30732B

NVBOA-60732BB
NVBOA-60832BB

NVBOA-60740BB
NVBOA-60840BB

VBOA-
120840B

Rated Maximum Voltage (kV) 36 72.5

145

Dielectric Withstand Voltage

Power Frequency (1 min Dry) (kV rms)

70 140

275

Lightning Impulse (Full Wave Withstand) (kV Peak)

200

350

650

Rated Frequency (Hz) 50/60
Rated Continuous Current (A) 2000

2000/3000

3000

Rated Short Circuit Breaking Current (kA) 31.5

40

40

Rated Transient Recovery Voltage: Rate of Rise (kV/μs) 1.19

1.47

2

First Pole to Clear Factor 1.5
Rated Closing and Latching Current (kA) 82

104

104

Rated Short-Circuit and Short-Time Current (kA) 31.5 (3s)

40 (3s)

Rated Interrupting Time (Cycle) 3
Rated Opening Time (s) 0.033

0.03

0.05

Rated Closing Time with No Load (s) 0.05

0.10

0.13

Operating Duty O-0.3s-CO-15s-CO
Rated Control Vlltage (Vdc) 48, 125, 250
Rated Motor Voltage 48, 125, 250

Rated supply voltage of motor

48Vdc/60Vac, 125Vdc/120Vac, 250Vdc/240Vac

Rated Dry Air Pressure (psig)

72.5

130.5

Closing Operation System

Spring

Tripping Operation System

Spring

Certifications

ANSI/IEEE C37.06, IEC 62271-100-2008





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