Depending on SAFDAR SASSANI’s long experience in this field, We manufacture Low HRC Fuse System based on the Know How , and with complete production line and testing equipment bought from ” AEG ” Germany. This fusing system comply with international electrical commission ( IEC ) 269-2 and German standard VDE 0660 . The dimensions to DIN 43620 are closely kept , so that our types will surely fit all other system. They have delayed characteristics in the
following scatter ranges:
– gL in accordance with VDE 0636
– gL in accordance with IEC 269-2
– gL in accordance with VDE 0660
Our HRC fuse links are selected in ratio 1:2 with all fuse links which fulfill IEC 269-2 class of operation gL and ratio 1:16 with all fuses which fulfill VDE 0636 class of operation gL irrespectively of the system. They are selective in ratio 1:1.25 with each other even under very high SHORT-CIRCUIT.
Internal Loss and Temperature Rise :
Due to inferior-self-resistance , internal loss and temperature rise under normal load can be neglected. Even under Over Load during several hours , working temperature remains within the allowed limits. The Low Self Resistance allows to expose the fuse to 20% Over permanently without deterioration.
The indicator on the top plate clearly indicates the switching condition . it reliably operates at voltages from 6 V upwards. The Fuse Body consists of :
– Special ” STEATITE ” , particularly resistant to alternating temperature.
– Contact Blades , Top , and Bottom plates all silver plated.
Uniform , good quality , and adherence of special technical characteristics , are guaranteed by 100% measurement during assembly and daily routine and random checks in our own , and in neutral testing station and laboratories in accordance with the said standards absolutely under ” AEG ” instructions.
Structure of (LV) HRC system:
The (LV) HRC system consists of the fuse link , fuse base , fuse gear , and universal operating handle , dimensioned for nominal voltage of 500 , or 660 V ( AC).
(LV) HRC Links 660 V and 500 V (AC) For Line Protection
Nominal current and time/current ranges:
Our HRC fuse links are manufactured in 7 sizes :
00-C From 4 to 100 A Current Rating
00 4 160
0 6 160
1 80 250
2 125 400
3 315 630
4 800 1000
PROTICUR ” ULTRA – RAPID ” FUSE LINKS
Ultra -Rapid action fuses type ” NT ” & ” NG ” designed to protect semi – conductor components in rectifiers in systems with nominal voltage 660 V. These fuses can also be relied upon , to perform protective tasks of a similar nature such as preventing thermal and dynamic over-loading in highly sensitive equipment.
IEC 269 – 4
DIN – VDE 0636 part 23 and part 33