ZGR3(XRNT5) -15.5H.V. current-limiting back-up fuse for short-circuit protection of oil-immersed transformer

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Description

General

ZGR3(XRNT5) -15.5H.V. current-limiting back-up fuse for short-circuit protection of oil-immersed transformer (here-under fuse) is available for H.V.indoor electric system, with rated voltage 15.5Kv,rated current up to 175A,50Hz a.c.. It is used for protecting from short-circuit for poower transformer.It can offer protection of all-round together in series with ZGR4 (PRNT13)-15.5 H.V. fuse for overload protection of oil-immersed transformer.

Standard

Accord with GB15166.2 Alternating-current high-voltage fuses Current-limiting fuse.

Order number

Rated Current	Order Number
31.5	ZGR3-31.5
40	ZGR3-40
50	ZGR3-50
63	ZGR3-63
80	ZGR3-80
100	ZGR3-100
125	ZGR3-125
150	ZGR3-150
175	ZGR3-175

Basic parameters

额定电压 KV	熔断器额定电流 A	溶体额定电流 A	外型尺寸	额定短路开断电流 A
17.2	125	31.5、40、50、63、80、100、125	图1	50
17.2	175	150、175	图2	50

Type instruction

Rated current of the fuse(A);Rated voltage of the fuse(KV);Desing reference;Transformer protection;Usage indoor;H.V.Fuse;Current-limiting;

Rated current of the fuse;Rated voltage of the fuse(KV);Desing reference;Transformer protection;Usage Indoor;H.V.Fuse;Expulsion

Performance

Fuse can't be used alone,It must be used in series with the back-up fuse to become protection of all-around.In using,the characteristic of the fuse and the back-up fuse must be considered enough.Figure the time-current characteristic of the fuse and the back-up fuse.A in figure is a point of the meeting two curves. B is min. breaking capacity current of the back-up fuse-link.C is rated max. breaking capacity current of the fuse. When fuse will be used in series with the back-up fuse-link,first the point A must be existence, second the point B is above the point A and the point C is below the point A.