Heating cables
Self-regulated heating cable Thermon VSX-HT
High performance VSX-HT self-regulating heating cables are designed specifically for process temperature maintenance or freeze protection applications where high maintain temperatures or high temperature exposures are required.
The heat output of VSX-HT cable varies in response to the surrounding temperature by reducing its thermal output with increasing temperature. VSX-HT cables can be installed in hazardous and Zone 1, 2, 21, and 22 areas.
Construction Thermon VSX-HT
1. Nickel-plated copper bus wires (14 AWG).
2. Semiconductive heating matrix and fluoropolymer dielectric insulation.
3. Nickel-plated copper brai.
4. Fluoropolymer overjacket provides additional protection for cable and braid where exposure to chemicals or corrosives is expected.
Features Thermon VSX-HT
- Freeze protection
- High process temperature maintenance
- Steam clean/purge
- Certified for use ordinary (nonclassified) ares and in potentially explosive atmpspheres
Power output curves
The power outputs shown apply to cable installed on insulated metallic pipe (using the procedures outlined in IEC/IEEE 60079-30-1) at the service voltages stated below. For use on other service voltages, contact Thermon.
| Catalog number 120 vac nominal | Catalog number 240 vac nominal | Power output at 50°F (10°C) w/ft (m) |
|---|---|---|
| VSX-HT-5-1 | VSX-HT-5-2 | 5 (16) |
| VSX-HT-10-1 | VSX-HT-10-2 | 10 (33) |
| VSX-HT-15-1 | VSX-HT-15-2 | 15 (49) |
| VSX-HT-20-1 | VSX-HT-20-2 | 20 (66) |
Circuit breaker sizing Thermon VSX-HT
Maximum circuit lengths for various circuit breaker amperages are shown below. Breaker sizing should be based on the National Electrical Code, Canadian Electrical Code or any other applicable code. The National Electrical Code and Canadian Electrical Code require ground-fault protection of equipment for each branch circuit supplying electric heating equipment. Check local codes for ground-fault protection requirements.
| 120 vac service voltage | Max. circuit length vs. breaker size ft (m) | ||||
|---|---|---|---|---|---|
| Catalog number | Start-up temperature °F (°C) | 20А | 30А | 40А | 50А |
| VSX-HT 5-1 | 50 (10) | 205 (62) | 330 (100) | 330 (100) | 330 (100) |
| 0 (- 18) | 205 (62) | 330 (100) | 330 (100) | 330 (100) | |
| - 20 (- 29) | 205 (62) | 330 (100) | 330 (100) | 330 (100) | |
| - 40 (- 40) | 205 (62) | 330 (100) | 330 (100) | 330 (100) | |
| VSX-HT 10-1 | 50 (10) | 130 (39) | 215 (65) | 255 (77) | 255 (77) |
| 0 (- 18) | 130 (39) | 215 (65) | 255 (77) | 255 (77) | |
| - 20 (- 29) | 130 (39) | 215 (65) | 255 (77) | 255 (77) | |
| - 40 (- 40) | 130 (39) | 215 (65) | 255 (77) | 255 (77) | |
| VSX-HT 15-1 | 50 (10) | 95 (28) | 155 (47) | 230 (70) | 230 (70) |
| 0 (- 18) | 95 (28) | 155 (47) | 230 (70) | 230 (70) | |
| - 20 (- 29) | 95 (28) | 155 (47) | 230 (70) | 230 (70) | |
| - 40 (- 40) | 95 (28) | 155 (47) | 230 (70) | 230 (70) | |
| VSX-HT 20-1 | 50 (10) | 70 (21) | 110 (33) |
155 (47) |
210 (64) |
| 0 (-18) | 60 (18) | 95 (28) | 140 (42) | 185 (56) | |
| - 20 (- 29) | 60 (18) | 95 (28) | 135 (41) | 180 (54) | |
| - 40 (- 40) | 60 (18) | 90 (27) | 130 (39) | 175 (53) | |
| 120 vac service voltage | Max. circuit length vs. breaker size ft (m) | ||||
|---|---|---|---|---|---|
| Catalog number | Start-up temperature °F (°C) | 20A | 30A | 40A | 50A |
| VSX-HT 5-2 | 50 (10) | 410 (124) | 680 (207) | 680 (207) | 680 (207) |
| 0 (- 18) | 410 (124) | 680 (207) | 680 (207) | 680 (207) | |
| - 20 (- 29) | 410 (124) | 680 (207) | 680 (207) | 680 (207) | |
| - 40 (- 40) | 410 (124) | 590 (179) | 590 (179) | 590 (179) | |
| VSX-HT 10-2 | 50 (10) | 265 (80) | 435 (132) | 555 (169) | 555 (169) |
| 0 (- 18) | 265 (80) | 435 (132) | 555 (169) | 555 (169) | |
| - 20 (- 29) | 265 (80) | 435 (132) | 555 (169) | 555 (169) | |
| - 40 (- 40) | 265 (80) | 435 (132) | 555 (169) | 555 (169) | |
| VSX-HT 15-2 | 50 (10) | 195 (59) | 310 (94) | 460 (140) | 515 (156) |
| 0 (- 18) | 185 (56) | 300 (91) | 445 (135) | 515 (156 | |
| - 20 (- 29) | 180 (54) | 290 (88) | 425 (129) | 515 (156) | |
| - 40 (- 40) | 175 (53) | 280 (85) | 515 (156) | ||
| VSX-HT 20-2 | 50 (10) | 150 (45) | 235 (71) | 340 (103) | 475 (144) |
| 0 (- 18) | 135 (41) | 215 (65) | 305 (92) | 420 (128) | |
| - 20 (- 29) | 130( 39) | 205 (62) | 295 (89) | 400 (121) | |
| - 40 (- 40) | 130( 39) | 200 (60) | 285 (86) | 390 (118) | |