ABB HD4 is a family of SF6 medium-voltage circuit breakers for switching and protection in power-distribution systems. The gas is used in the interrupting poles; the breaker operates with a stored-energy mechanism. Applications described by ABB include distribution lines, substations, motors, transformers and capacitor banks, with the breaker and its protection/control equipment selected for the actual duty.
This page focuses on 17 existing 40.5 kV references, including HD4 fixed and HD4/Z withdrawable entries. It is a model-reference list, not the complete worldwide HD4 range. Ratings, environmental conditions and installation interfaces must be checked against the exact breaker configuration and its documentation.
HD4 40.5 kV Product Scope
The linked ABB English catalogue, document 1YHA000046 Rev A (08-2022), describes the 40.5 kV range. It documents fixed breakers and HD4/Z withdrawable versions, including applications in PowerBlock modules and UniGear ZS3.2 switchgear. These catalogue descriptions do not establish that every listed breaker fits a particular existing cubicle.
Fixed & Withdrawable Installation
For a fixed breaker, confirm the mounting arrangement, primary terminals, pole spacing and external connections. For a withdrawable version, also confirm the truck, primary contact interfaces, secondary plug, interlocks and service/test positions against the switchgear drawings. The fixed and withdrawable outlines in the catalogue differ; the HD4 name or a matching current rating alone does not establish interchangeability.
Ratings & Standards: Confirm the Exact Configuration
The 40.5 kV selection tables on pages 15–16 of the linked catalogue list rated normal currents from 1250 to 3150 A and short-circuit breaking capacities of 25 or 31.5 kA for their documented configurations. These are catalogue selection ranges, not a rating shared by every HD4. The existing table below contains its original combinations; confirm the nameplate and configuration-specific data before selection.
The same catalogue identifies IEC 62271-100 and GB/T 1984. Confirm the applicable standard and edition for the project and exact product version; this information does not establish ANSI or UL performance. Rated normal current, short-circuit breaking current, short-time withstand current and making current describe different duties. Confirm the required values, duration, frequency and operating sequence independently rather than treating one kA value as all of them.
Environment, Cooling & Control Equipment
Check ambient temperature, altitude, installation environment and ventilation with the exact application documentation. In the linked catalogue’s 40.5 kV tables, 3150 A carries a forced-ventilation footnote, and operation at −25°C requires consultation with the manufacturer. Neither condition establishes the performance of an unverified “Without Fan” or “Low Temperature” entry in the existing list.
Confirm the AC/DC control-supply voltage and frequency for the closing and opening releases and spring-charging motor, required auxiliary contacts, interlocks and gas-pressure monitoring where specified. The options and wiring must match the ordered breaker and switchgear control circuit; do not assume one control voltage or accessory set applies throughout HD4.
Selection & Quotation Information
Send the complete model designation, a readable nameplate photo and any ABB order code/article number or serial number available. Include rated voltage, normal current, short-circuit breaking duty, applicable standard, fixed or withdrawable installation, switchgear manufacturer/type and interface or wiring drawings, control-supply details, environmental/cooling conditions, quantity and destination country.
For an existing cubicle, provide primary-contact, truck, secondary-plug and interlock details as relevant. A quotation or identification check does not itself confirm replacement, compatibility or cabinet fit.
Browse Medium Voltage Products, compare the separate VD4 vacuum circuit breaker page for product information, or Contact us with your requirements. The VD4 link does not imply an HD4 replacement relationship.
Examples from the Existing Model References
- HD4/Z 40.12.25 FOR ZS3.2
- HD4/Z 40.12.31 FOR ZS3.2
- HD4/Z 40.16.25 FOR ZS3.2
- HD4/Z 40.16.31 FOR ZS3.2
- HD4/Z 40.20.25 FOR ZS3.2
- HD4/Z 40.20.31 FOR ZS3.2
- HD4 40.25.31 FOR ZS3.2
- HD4 40.31.31 FOR ZS3.2
ABB HD4 Model References
Search the 17 existing entries by model text. This table has no Order Code / Article Number column; provide a code from the nameplate or original documentation if available.
Configuration verification required: the two 3150 A entries labelled “Without Fan” need confirmation against the linked catalogue’s forced-ventilation footnote. The seven entries labelled “Low Temperature” do not establish a verified temperature range. These original references are retained for identification; confirm cooling, environment and cabinet interfaces before using them for selection.
| Model | Voltage | Rated Current | Breaking Capacity |
|---|---|---|---|
| HD4/Z 40.12.25 FOR ZS3.2 Low Temperature | 40.5 kV | 1250 A | 25 kA |
| HD4/Z 40.12.31 FOR ZS3.2 Low Temperature | 40.5 kV | 1250 A | 31.5 kA |
| HD4/Z 40.16.25 FOR ZS3.2 Low Temperature | 40.5 kV | 1600 A | 25 kA |
| HD4/Z 40.16.31 FOR ZS3.2 Low Temperature | 40.5 kV | 1600 A | 31.5 kA |
| HD4/Z 40.20.25 FOR ZS3.2 Low Temperature | 40.5 kV | 2000 A | 25 kA |
| HD4/Z 40.20.31 FOR ZS3.2 Low Temperature | 40.5 kV | 2000 A | 31.5 kA |
| HD4/Z 40.25.25 FOR ZS3.2 Low Temperature | 40.5 kV | 2500 A | 25 kA |
| HD4 40.12.25 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 1250 A | 25 kA |
| HD4 40.12.31 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 1250 A | 31.5 kA |
| HD4 40.16.25 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 1600 A | 25 kA |
| HD4 40.16.31 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 1600 A | 31.5 kA |
| HD4 40.20.25 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 2000 A | 25 kA |
| HD4 40.20.31 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 2000 A | 31.5 kA |
| HD4 40.25.25 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 2500 A | 25 kA |
| HD4 40.25.31 FOR ZS3.2 Fixed / Normal Temperature | 40.5 kV | 2500 A | 31.5 kA |
| HD4 40.31.25 FOR ZS3.2 Fixed / Normal Temperature / Without Fan | 40.5 kV | 3150 A | 25 kA |
| HD4 40.31.31 FOR ZS3.2 Fixed / Normal Temperature / Without Fan | 40.5 kV | 3150 A | 31.5 kA |