Outdoor distribution networks
Coordinate ZW20 and ZW32-12 equipment with the feeder duty, installation support, sensing and control arrangement.
Product selection detailsOverhead feeder switching. Illustrative application context.
An outdoor distribution enquiry starts with the position of the switching equipment in the network. A feeder section, a tie point and a boundary between the supply network and a user installation can require different operating and protection arrangements. Describe that role on the single-line diagram before selecting the breaker and its associated controls.
The ZW20 manual describes urban and rural overhead distribution applications with a coordinated breaker and controller assembly. The ZW32-12 manual identifies protection and control in urban and rural networks. These references provide a starting point for selection; the ordered model, operating supply, sensing and controller still need to match the project. A family name alone does not define automatic reclosing, communication functions or the protection settings for the feeder.
Provide the required voltage, current, short-circuit duty and operating sequence with the single-line diagram. Identify whether the equipment serves a feeder section, a tie point or a user boundary, and show the upstream and downstream protection arrangement. This defines the duty to review before choosing a model or discussing controller functions.
Record the installation location, ambient conditions, altitude and exposure relevant to the site. Include a pole or support-frame drawing with mounting positions, connection directions and operating access. Review these conditions against the selected manual; the dimensions of a representative product photograph do not establish the support arrangement or the space needed for the complete assembly.
Identify the CT and PT requirements, their ratios and connection interfaces, and the proposed protection or control system. Where a controller forms part of the assembly, specify the required functions and provide its circuit information. Confirm the sensing package for the exact configuration rather than assuming that every breaker in the family has the same sensors.
Specify the available operating supply, local operating method and any required remote commands or communication interface. For an existing installation, record the breaker and controller nameplates as well as the wiring diagram. Controller selection and protection settings must be coordinated with the network requirements; the mechanism, controller and supply should be reviewed together.
State whether a separate or associated disconnector is required, its operating direction and the intended interlock sequence. Show the arrangement on the installation drawing so that access, connections and operation can be checked together. The pictured ZW32 sample includes a disconnector, but that photograph does not make the same isolation arrangement standard on every ordered unit.
Compare the model, mounting, sensing and control options with your feeder requirements.
For outdoor feeder and boundary-switching arrangements. Review the exact suffix, insulation arrangement, controller, sensing, operating supply and mounting dimensions as one configuration. The original manual describes a coordinated control package; its functions should be confirmed for the assembly being specified.
Shown: a supplied ZW20 product sample.
Review ZW20 and outdoor models
For outdoor distribution protection and control. Confirm the required duty, operating method, disconnector arrangement and secondary interfaces. Coordinate the breaker with the mounting drawing and the specified control system, including any CT, PT or communication requirements relevant to the selected version.
Shown: a ZW32-12 sample with a disconnector.
Review ZW32-12 and outdoor modelsKeep the network duty, physical installation and control interfaces together. For a replacement, include the existing arrangement and describe which interfaces must be retained.
Single-line diagram, feeder role, required electrical duty and the protection arrangement.
Pole or support layout, connection direction, mounting dimensions and operating access.
Operating supply, CT/PT information, controller designation, local controls and remote-interface requirements.
Record the exact breaker designation and controller package when requesting an outdoor manual or installation drawing. The public library contains the Liqiang catalogue and published product manuals; the document edition and equipment arrangement should be checked before using a drawing or operating reference for the proposed equipment.
