Nelson QLT215 Heat Tracing Cable

Nelson QLT215 Heat Tracing Cable
NELSON™
QLT SELF-REGULATING HEATER CABLE
SPECIFICATION/APPLICATION
INFORMATION
• Fluoropolymer Overjacket
• Metal Braid
QLT10-J
QLT15-J
QLT20-J
QLT210-J
QLT215-J
QLT220-J
• Stranded Nickel Plated Copper Conductors
• Self Regulating Conductive Core
• Outer Fluoropolymer Jacket
Description:
Nelson's Type QLT self-regulating
heater cable is a parallel circuit electric
heater strip. A conductive fluoropolymer
core material is extruded over the multistranded, nickel-plated, 16-gauge copper
bus wires. A fluoropolymer jacket
provides excellent dielectric strength,
moisture resistance, protection from
impact and abrasion damage, and a wide
range of chemical resistance. A stranded
tinned copper metal braid and
fluoropolymer overjacket is supplied on
all heaters.
conductive core material. As the core
material temperature increases, the
number of conductive paths in the core
material decreases, automatically
decreasing the heat output. As the
temperature decreases, the number of
conductive paths increases, causing the
heat output to increase. This occurs at
every point along the length of the cable,
adjusting the power output to the varying
conditions along the pipe.
The self-regulating effect allows the
cable to be overlapped without creating
hot spots or burnout. As the cable selfregulates its heat output, it limits the
maximum sheath temperature, while also
providing useful power for process
temperature maintenance.
Operating Principle:
The Parallel bus wires apply
voltage along the entire length of the
heater cable. The conductive core
provides a continuous parallel heating
element permitting the cable to be cut to
any length in the field with no dead or
cold zones developing. The heater cable
derives its self-regulating characteristic
from the inherent properties of the
Application:
Nelson's Type QLT self-regulating
heater cable is ideal for maintaining fluid
flow over a wide range of operating
temperatures. The product is used for
freeze protection and temperature
maintenance for 250°F (121°C) or lower
processes. Typical applications include
hydrocarbon and chemical product
piping. A tinned copper metal braid with
a fluoropolymer overjacket is supplied for
use when the heater cable is exposed to
excessive moisture, organic chemicals,
solvents, etc. in hazardous (classified
areas and ordinary areas.
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.heattracing.co.uk
www.thorneanderrick.co.uk
NELSON™
SPECIFICATION/APPLICATION
INFORMATION
QLT SELF-REGULATING HEATER CABLE
Performance and Rating Data:
*
Catalog
Number
Service
Voltage
Maximum
Length
QLT10-J
QLT210-J
QLT15-J
QLT215-J
QLT20-J
QLT220-J
120
240
120
240
120
240
190
375
135
270
105
210
Maximum
Maintenance
Temperature
250°F
250°F
250°F
250°F
250°F
250°F
(121°C)
(121°C)
(121°C)
(121°C)
(121°C)
(121°C)
Maximum
Intermittent
Exposure
250°F
250°F
250°F
250°F
250°F
250°F
(121°C)
(121°C)
(121°C)
(121°C)
(121°C)
(121°C)
T-Rating*
T3
T3
T3
T3
T3
T3
Electrical equipment T-rating codes define the maximum surface temperature that equipment will reach. It is used in
hazardous (classified) area applications.
Circuit Breaker Selection:
Watts/Ft.
10
15
20
15A
115
80
65
Max. Length (Feet) Vs. Circuit Breaker Size
120 Volt
240 Volt
20A
30A
15A
20A
150
190
225
300
110
135
160
215
85
105
125
170
30A
375
270
210
NOTES:
1. Circuit breakers are sized per national electrical codes and are based on start-up temperatures between -20°F (-29°C)
and 50°F (10°C).
2. When using 240 volt product at 208, 220 or 277 volts, use the circuit adjustment factors shown in the Voltage Adjustment Table.
3. When using 2 or more heater cables of different wattage ratings in parallel on a single circuit breaker, use the 15A column
amperage of 15 amps, divide it by the maximum footage to arrive at an amps/foot figure for each cable. You can then calculate
circuit breaker sizes for these combination loads. These amps/foot factors include the 125% sizing factor.
5. National electrical codes require ground-fault equipment protection for each branch circuit supplying electric heating equipment.
Exceptions to this requirement can be found in the 2002 N.E.C.
NELSON™
22
QLT SELF-REGULATING HEATER CABLE
SPECIFICATION/APPLICATION
INFORMATION
16
18
20
C
14
12
10
A
0
2
4
6
8
WATTS PER FOOT
B
50
(10)
90
(32)
130
(54)
170
(77)
210
(99)
TEMPERTURE DEGREES F (C)
A
QLT10
QLT210
B QLT15
QLT215
WATTS PER FOOT x 3.28 = WATTS PER METER
PIPE TEMPERATURE °F CONVERSION TO °C = 5/9 (°F – 32)
C QLT20
QLT220
250
(121)
NELSON™
SPECIFICATION/APPLICATION
INFORMATION
QLT SELF-REGULATING HEATER CABLE
Catalog Numbers:
Standard Feature Suffix:
-J
CATALOG NUMBERS
Tinned Copper Braid and Fluoropolymer Overjacket
Watts Per Foot
Voltage
10
15
20
120 VAC
QLT10-J
QLT15-J
QLT20-J
240 VAC
QLT210-J
QLT215-J
QLT220-J
Voltage Adjustment:
Use of Self-Regulating products at other than rated voltages require minor adjustments in power and maximum circuit lengths.
Product
QLT210-J
QLT215-J
QLT220-J
Approvals:
208 VAC
Power
Length
.80
.93
.83
.93
.88
I.00
ADJUSTMENT MULTIPLIER
220 VAC
Power
Length
.88
.96
.89
.96
.93
1.00
277 VAC
Power
Length
1.23
1.07
1.19
1.02
1.15
1.00
Absolute
Max Length
375 ft.
270 ft.
210 ft.
UL
Ordinary LocationsHazardous (Classified)
Locations
Class I, Division 2
Groups A, B, C, D
Class II, Division 2
Groups F, G
Class III, Division 2
Class I, Zone 1 and 2
Group IIC
Accessories:
•
•
•
•
•
Connection Kits for Power Connection, Tee Splice, Splices and End Seals (Nelson PLT and ALT Series)
Thermostatic Controls (Nelson TA, TH, TE and HC Series)
Junction Boxes, Tapes and Warning Signs
Custom Control, Monitoring and Power Panels
Zone 1 Connection Kits for Power Connection, Tee Splice, Splice and End Connection (Nelson Z1-PLT and Z1-ALT Series)
Nelson Heat Tracing Systems products are supplied with a limited warranty. Complete Terms and Conditions may be found on Nelson's website at
www.nelsonheaters.com.
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.heattracing.co.uk
www.thorneanderrick.co.uk
NELSON HEAT TRACING SYSTEMS • P.O. BOX 726 • TULSA, OK 74101 • 918-627-5530 • FAX 918-641-7336 • www.nelsonheaters.com
© 2006 Nelson Heat Tracing Systems
314-SA-010
May 2006
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