Fuse Link selection
- Select a rating of fuse link which is at least equal to the normal full load current of the circuit, including any allowances needed for harmonic currents, as in the case p.f. correction circuits.
- Ensure that the fuse link rating can withstand any over currents which may apply to the circuit, such as transformer in-rush currents, motor starting surges and repetitive cycle loads.
- When full cable protection is required, ensure that the fuse link rating is compatible with the selected cable, i.e. less than or equal to cable rating.
| Fuseholder rating |
'RED SPOT' HRF fuse link to BS88:Part 2: 1988 660 Volt a.c. |
Extended Range of 'RED SPOT' HRC fuse links to BS 88: Part 2: 1988 for motor circuit protection | |
|
| Amp | TYPE: | TYPE: |
Current rating Amp |
Rating for motor starting Amp |
| 20 | NIT2-20A | NIT20M251 NIT20M321 |
20 20 |
25 32 |
| 32 | TIA2-32A | TIA32M35 TIA32M40 TIA32M50 TIA32M63 |
32 32 32 32 |
35 40 50 63 |
| 63 | TIA2-32A TIS35-63A | TIS63M80 TIS63M100 | 63 63 |
80 100 |
| 100 | TIA2-32A TIS35-63A TCP63-100A |
TCP100M125 TCP100M160 TCP100M200 |
100 100 100 |
125 160 200 |
| 200 | TBC2-3A TC80 & 100A TF125-200A |
TF200M250 TF200M315 |
200 200 |
250 315 |
| 400 | TKM250 & 350A TM355 & 400A |
TM400M450 | 400 | 450 |
Recommended minimum torque values
| Rating | Fuse Link fixing screw | Cable terminal screw | Back connected stud | |||
| Size | Torque | Size | Torque | Size | Torque | |
| RS20 | 4BA (Ø35mm) | 1,2Nm | 1/4” BSF grub screw | 2,0Nm | M6 | 3,0Nm |
| Pan head | (11 lb.in) | (Slotted) | (18 lb.in) | (27 lb.in) | ||
| RS32 | 2BA (Ø45mm) | 2,0Nm | 1/4” BSF grub screw | 2,0Nm | M6 | 3,0Nm |
| Pan head | (18 lb.in) | (Slotted) | (18 lb.in) | (27 lb.in) | ||
| RS63 | 2BA (Ø45mm) | 2,0Nm | 3/8” BSF grub screw | 3,5Nm | M8 | 6,0Nm |
| Pan head | (18 lb.in) | (Slotted) | (31 lb.in) | (53 lb.in) | ||
| RS100 | M6 | 2,5Nm | 1/2” BSF grub screw | 4,0Nm | M10 | 10,0Nm |
| Pan head | (22 lb.in) | (Slotted) | (35 lb.in) | (89 lb.in) | ||
| RS200 | M6 | 2,5Nm | 5/8” BSF hex head | 25,0Nm | M12 | 14,0Nm |
| Pan head | (22 lb.in) | (18mm A/F) | (18,5 lb.ft) | (10 lb.ft) | ||
| RS400 | M8 | 6,0Nm | 5/8” BSF hex head | 25,0Nm | M16 | 25,0Nm |
| Hex head | (53 lb.in) | (18mm A/F) | (18,5 lb.ft) | (18,5 lb.ft) | ||
| Note: | Conversion from Nm to lb.in. | 1Nm = 8,85075 lb.in. |
(From Red Spot catalogue.)