HH GP / FR general-purpose and full-range high-voltage fuse-links
HH GP and FR are high-voltage current-limiting fuse-links with DIN 43625 dimensions for rated voltages of 7.2–40.5 kV. They interrupt both short-circuit currents and overload currents. They are used in distribution substations, industrial networks and gas-insulated switchgear.
- GP class
- General-Purpose, minimum breaking current 1.5–3 In (melting in 1 h or more)
- FR class
- Full-Range, interruption of any current that causes melting, up to the rated maximum breaking current
- Dimensions
- DIN 43625
- Rated voltage
- 7.2–40.5 kV under IEC 60282-1
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The HH GP and FR series complement the main Back-Up line with high-voltage current-limiting fuse-links that interrupt both short-circuit currents and overload currents. For this reason they can be installed on feeders where separate overload protection is absent or undesirable.
GP (General-Purpose fuse-links) have DIN 43625 dimensions. Under the specified conditions of use they interrupt all currents from the rated maximum breaking current down to a small current that melts the fuse-link in 1 hour or more. The minimum breaking current is 1.5–3 times the rated current, noticeably lower than for Back-Up fuse-links (3–5 In). FR (Full-Range fuse-links) also have DIN 43625 dimensions and interrupt any current that causes the fuse element to melt, up to the rated maximum breaking current. They protect over the whole current range, so they are especially suitable for individual protection of equipment, for example capacitors under the American individual fusing scheme, as well as cables and low-power transformers.
The design is common to the HH range. It consists of a silver fuse element with notches, quartz sand, and an insulating tube of electrical porcelain or glass-reinforced plastic with elastic seals. The 80 N striker has a built-in temperature limiter that keeps the heating of the switchgear wall below 150 °C. The 120 N striker is used to drive a load-break switch and for signalling. The rated voltages comply with IEC 60282-1 and are 7.2 kV, 12 kV, 17.5 kV, 24 kV, 36 kV and 40.5 kV, as well as 27 kV and 38.5 kV. The choice between classes depends on the protection scheme. GP is suitable where interruption of small overload currents is required, FR where there is no separate protective device.
The fuse-links are stored in their original packaging at −40…+85 °C and operated at −25…+40 °C. They comply with REACH, and their components contain no substances of very high concern from the candidate list above 0.1 % by weight. Field of application: distribution substations, industrial networks, outdoor installations, gas-insulated switchgear. The class (BU, GP, FR) is chosen according to the feeder protection scheme and the time-current characteristics, taking IEC/TR 62655 into account.
Technical specifications
| GP class | General-Purpose, minimum breaking current 1.5–3 In (melting in 1 h or more) |
|---|---|
| FR class | Full-Range, interruption of any current that causes melting, up to the rated maximum breaking current |
| Dimensions | DIN 43625 |
| Rated voltage | 7.2–40.5 kV under IEC 60282-1 |
| Striker | 80 N with temperature limiter or 120 N |
| Standards | IEC 60282-1, IEC/TR 62655 |
Request a price and lead time
HH GP / FR general-purpose and full-range high-voltage fuse-links. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
How does the GP class differ from the Back-Up class?
The minimum breaking current of GP is 1.5–3 times the rated current, while for Back-Up fuse-links it is 3–5 In. GP interrupts currents down to those that melt the element in 1 hour or more.
What rated voltages are GP and FR fuse-links available for?
The IEC 60282-1 series comprises 7.2 kV, 12 kV, 17.5 kV, 24 kV, 36 kV and 40.5 kV, as well as 27 kV and 38.5 kV. The dimensions follow DIN 43625.
At what temperatures are the fuse-links stored and operated?
Storage in the original packaging is permitted at −40…+85 °C, operation at −25…+40 °C. The 80 N striker has a built-in temperature limiter that keeps the heating of the switchgear wall below 150 °C.
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