VW3GZ-16 Series DC Disconnector
The VW3GZ-16 Series is a DC disconnector designed for photovoltaic, wind power and energy storage systems, with rated current from 200A to 1600A and rated working voltage up to DC1500V.
Disconnect Switch
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FAQs
Q: Which VOZWEI DC disconnect switch series are available?
A: VOZWEI offers two DC disconnect switch series for main-circuit isolation: the VW3GZ-16 covers In 200A–1600A and the VW3GZ-40 covers In 630A–4000A. Both work up to DC1500V, with Icw 55kA/1s on the VW3GZ-16 and 100kA/1s on the VW3GZ-40.
Q: What are the main differences between VOZWEI VW3GZ-16 and VW3GZ-40?
A: The VOZWEI VW3GZ-16 covers In 200A–1600A with Icw 55kA/1s, IP30 and DC22A/DC23A utilization categories. The larger VOZWEI VW3GZ-40 covers In 630A–4000A with Icw 100kA/1s and 150kA/0.2s, IP40 and the DC-PV2 photovoltaic category. Both share a DMC housing and dual-stage main-arc contacts.
Q: What pole configurations does the VOZWEI VW3GZ support?
A: On the VOZWEI VW3GZ-16, the 3P version is rated DC1000V and the 4P version DC1500V, so DC1500V arrays need the 4P. The VOZWEI VW3GZ-40 is offered only in 2P, which simplifies wiring. Check pole count, voltage and Icw together.
Q: Which VOZWEI VW3GZ switch suits DC1500V systems?
A: For DC1500V solar or storage main circuits, choose a VOZWEI VW3GZ-16 in its 4P version or a VOZWEI VW3GZ-40 in 2P covering DC500/750/1000/1200/1500V. Match In to the load (200A–1600A on the VW3GZ-16 or 630A–4000A on the VW3GZ-40) and confirm Icw exceeds the prospective short-circuit current.
Q: How do I select VOZWEI VW3GZ-16 or VW3GZ-40 rating?
A: Select the VOZWEI VW3GZ-16 for In 200A–1600A with Icw 55kA/1s, or the VW3GZ-40 for In 630A–4000A with Icw 100kA/1s and 150kA/0.2s. In must cover continuous main-circuit current and Icw must exceed the prospective short-circuit current at the isolation point.
Q: What do DC22A, DC23A and DC-PV2 mean on VOZWEI VW3GZ?
A: Utilization categories describe switching duty. The VOZWEI VW3GZ-16 is rated DC22A and DC23A, covering mixed resistive-inductive DC loads plus highly inductive DC circuits. The VOZWEI VW3GZ-40 is rated DC-PV2, the photovoltaic category for DC switching in PV arrays.
Q: Which applications suit VOZWEI VW3GZ disconnect switches?
A: The VOZWEI VW3GZ-16 and VW3GZ-40 disconnect switches isolate the main DC circuit in solar and energy storage systems at up to DC1500V. Both operate from -40°C to +75°C, with IP30 on the VW3GZ-16 and IP40 on the VW3GZ-40, and dual-stage main-arc contact design.
Q: How does VOZWEI VW3GZ differ from a VOZWEI VGC fuse?
A: A VOZWEI VW3GZ disconnect switch is intended for main-circuit isolation and is rated for short-time withstand current Icw, not for fault-current breaking. A VOZWEI VGC fuse provides overcurrent protection with up to 50kA DC breaking capacity. Use the VW3GZ together with a VOZWEI VGC fuse or other DC-rated overcurrent device.