Vertical Fuse switch Disconnector NHRT40

1. General

1.1 Application NHRT40 series vertical fuse-switch disconnector is applicable in the circuit of rated voltage AC690V and below, rated current AC 160A-630A, rated frequency of 50Hz. NHRT40 series are infrequently manually operated multipolar fuse combination switches. They break or switch off on load and provide safely isolation and protection against overcurrent for any voltage electrical circuit.

1.2 Standard: IEC 60947-3.

2. Structure and features

2.1 Structure: The switch is consisted of underpan, base, cover, handle and shield.

2.2 NT series fuse link is installed in the cover to act as knife of active contact.

2.3 The handle moves fan-shapely based on the pivot of underpan, makes the cover and fuse make and break together, it is with enough space and remarkable disconnection point which meets the requirement of disconnector switch.

2.4 It is convenient to dismount the base and underpan, which is easy to mount the base to the busbar safely and reliably.

2.5 There is arc extinguisher on the underpan, which ensures breaking capacity of the switch.

3.Overall and mounting dimensions (mm)

3.1 NHRT40-160 Independent operation phase to phase

3.2 NHRT40-160 Simuitaneous operation of three phases

3.2 NHRT40-250, 400, 630 Independent operation phase to phase

3.4 NHRT40-250, 400, 630 Simuitaneous operation of three phases

A disconnect switch fuse Isolating switch is a switching device that switches/isolates loads and distribution boards manually.

It is capable of making, carrying and breaking the specified rated current (including specified overload).

It protects backward electrical loads, safely disconnecting all electrodes and electrical components from the power supply under load.

In addition to the protection provided by the fuse, the Fused disconnect switch also has the characteristics of a load switch and an isolating switch.

It consists of three groups of switchblades and plastic bodies, each group of switchblades constitutes a double break for each phase. There is a gap reserved for bridging fuses in the centre of each set of blades.

The disadvantage of this arrangement is that when the switch is turned on to replace the fuse, the circuit connected to the fused disconnect switch may still have leakage current,

so electricians should use professional protective equipment such as insulating gloves, hard hats, etc. when they replacing the fuse.