80% NICKEL - 20% CHROMIUM

NI/CR-80/20 is the highest development in metallic alloys for use as resistors at elevated temperatures. Processes developed over the years led to steady increase in the ability of this alloy to withstand high temperatures for long duration NI/CR - 80/20 is essential for resistors elements in the higher temperature applications such as electric furnaces, electric ranges, radiant heaters operating at temperatures up to 2100� F. In addition to these qualities and standard uses it has found wide application for resistance in technical applications due to its combination of high electrical resistance and a temperature much less than Nickel Chromium 60.

• Withstands Operating Temperatures To 2100�F
• Corrosion Resistant
• Long Life, Quick Heating
• Formed To Make Helical Coil Heaters

NOMINAL ANALYSIS

Nickel.............. 78.4%

Chromium....... 20.0%

Silicon............. 1.0%

Iron.................. .5%

Plus 5 other minor constituents

 

CAUTION Products should be installed and used properly to avoid electrical shocks and fire

Specifications

Melting point: 2550�F (1400� C)

Specific gravity: 8.41

Composition: 80%NI;20%CR

Specific resistance: 650 OHMS per circular mil-foot at 68�F (20�C)

Nominal coefficient of linear expansion: 0.000017(10-1000� C)

Tensile strength at 20�C

Hard Drawn; 200,000 Lbs/in�

Soft Annealed; 100,000 Lbs/in�

Nominal temperature coefficient of resistance: 0.00011 ohms/ohms. �c (20-500�C)

AKINSUN open coil elements are precision wound from high quality Nickel-Chromium and other popular heating alloys. Over the years we have produced helical coiled heating elements to meet specific design requirements. Knowing the operating temperature is important. Wire selection is based on operating temperature. Calculation of resistance or the wattage is based on the following ohm law.

Using letters to represent quantity:

R = Resistance (ohms)
W = Watts
E = Volts (Electromotive Force)
I = Current (Amperes)
E = I x R, or I = E/R, R = E/I

The ratio between watts and any two of the above factors is as follows:
W = (ExE)/R = E�/R, W = IxE.

Coil to wire diameter ratio

The ratio of a coil is the relationship of its outside diameter to the diameter of the wire. Recommended coil ratio is between 5�:1 and 12:1. Very high and a very low ratio tends to make a coil difficult to manufacture.

Stretch ratio

Stretch ratio of a coil is its stretched length divided by its close wound length. Stretching a coil provides a space between each turn of wire to keep the coils from short circuiting each other and burning out. In order to obtain even heat distribution the spacing between should be uniform. For good heat distribution stretch ratio should be 2:1 to 4:1.

FIBERGLASS SLEEVING
200� C (392� F) For extra insulation and protection where abrasion and heat is a problem.
	SIZE	SLEEVING I.D.	PART NO.
	NO.3	.234	CP1628-3
	NO.4	.208	CP1628-4
	NO.6	.166	CP1628-6
	NO.8	.133	CP1628-8
	NO.10	.106	CP1628-10
	NO.14	.066	CP1628-14
CERAMIC BEADS
	SIZE	WIRE SIZE B & S	BEAD I.D.	BEADS PER/FT.
	NO. 2	NO. 18	.068	84
	NO. 3	NO. 14	.092	72
	NO. 4	NO. 12	.152	54
	NO.5	NO. 10	.124	45
	NO. 6	NO. 8	.180	37
TERMINAL LUG FOR HOOKUP
	Part Number	WIRE GAUGE	SCREW SIZE
	CP1653 -6	18-22	10
	CP1653 -5	18-22	8
	CP1653 -4	14-16	10
	CP1653 -3	14-16	8
	CP1653 -2	10-12	10
	CP1653 -1	10-12	8
PLUGS (HUBBELL)
	TYPE	AMP. 120V	Capacity 240V	Part Number MALE	Part Number FEMALE
	Two prong twist lock	15A	--	4520	2313
	Three Prong Twist Lock	15A	10A	7572G	7555
	Two Prong Straight	15 A	---	5442	----
	Three Prong Straight	15A	---	5264	----
	Available in straight and twist lock Prongs, both male and female.
CERAMIC TERMINAL COVERS
	Part Number			Screw Size
	CT10-32		10-32
	CT8-32			8-32

 

HIGH TEMPERATURE LEAD WIRE
		Hightemperature Teflon and fiberglass insulated lead wire available in 250°C(482°F), 600 Volts, and 450°C(842°F),  600 Volts. U.L. and C.S.Aapproved. Also available high temperature, Teflon and neoprene leadwire.		Approximatecurrent carrying capacities for insulated wire based on Ambient Temp. of86° F
				Conductor
				Size AWG	Copper	Ni-CladCopper	Nickel
				24	7.5	5.3	3.1
				22	10	7	401
				20	13	9.1	5.4
				18	17	11.9	7.1
				16	22	15.4	9.2
				14	30	21	12.5
				12	40	28	16.8
				10	50	35	21
TEFLON-GLASSFIBERGLASS INSULATED HOOK-UP LEAD WIRE ( Ni-Clad Copper conductor)				MICA-GLASSINSULATED HIGH TEMPERATURE HOOK-UP LEAD WIRE ( Ni-Clad Copper conductor)
482°F (250°C)600V				842°F (450°C)600V
GAUGE	PART NO.	TYPESTANDARD	NOM.OD., IN. .008/-.006	GAUGE	PART NO.	TYPESTANDARD	NOM.OD.,IN. +.008/-.006
22	LD1200-22	7X 30	.096	22	LD1214-22	7X 30	.101
20	LD1200-20	7X .0121	.103	20	LD1214-20	10X 30	.110
18	LD1200-18	19X .0092	.108	18	LD1214-18	16X 30	.117
16	LD1200-16	26X 30	.123	16	LD1214-16	26X 30	.128
14	LD1200-14	41X 30	.140	14	LD1214-14	41X 30	.144
12	LD1200-12	65X 30	.161	12	LD1214-12	65X 30	.161
10	LD1200-10	105X 30	.184	10	LD1214-10	105X 30	.223

BUS BAR
	Good up to 1100 � F, .032 thick X 1/2 IN. wide ORDER CODE: AP1450 25 Ft. Minimum order

STAINLESS STEEL CONDUIT
	PART NO.	O.D.	I.D.
	CP1621-08	.234	.156
	CP1621-10	.312	.218
	CP1621-12	.344	.250
	CP1621-16S	.438	.344
Used for protection of lead wire.	CP1621-16	.500	.375

SILICONE FIBERGLASS TAPE
	7 Mils thick, Pressure sensitive 1/2 in. wide, adhesive tape good up to 350� F (175� C) 108 ft. long ORDER CODE: CP 1667

Ceramic heaters of various shapes and forms are made of the highest quality refractory ceramic with heating coils of nickel chromium resistance wire.

Coils are imbedded in grooves and sometimes cemented in place when the application calls for it.

Application

• Resistor Element
• Radiant Heater
• Air Heater
• Dehumidifier
• Cabinet Heating
• Surface Heating
• Packaging
• Oven Heating

Features

• Available 120, 208, 240 and 480V
• Leads termination available
• Mounting ease
• Single bolt type mounting
• Screw in type mounting
• Threaded rod through type mounting

CERAMIC DISC HEATER	PART NO.		WATTS	VOLTS
	CS1032-1		250	120V
	CS1032-2		250	240V
	3 1/8" O.D. x 11/16 Thick 6-32 Screw terminals .205 Diameter center hole for mounting
CERAMIC CONE HEATER
	PART NO.	WATTS			VOLTS
	CS1003-01	500			120V
	CS1003-02	660			120V
	CS1003-03	660			208V
	CS1003-04	660			240V
	CS1003-05	1000			120V
	CS1003-06	1000			240V
	4 1/8" Long tapered Edison screw base mounting
CERAMIC "EHT" HEATER	PART NO.	WATTS			VOLTS
	EHT-0001	3000			240
	EHT-0003	2002			240
	EHT-0005	3500			240
	EHT-0007	2500			240
	EHT-0008	2000			115
	EHT-0011	2500			208
	EHT-0013	1500			240
	10-32 Screw terminals. Center hole 3/8" diameter is used for mounting

Note: Watts and Volts other than listed are also available. Please contact the factory.

Solid-state Relays (SSRs) are electronic switching devices that accept a time proportioned or on /off signal from a controller. Rapid cycling can wear out electromechanical relay, whereas SSRs operate at much smaller cycle times. Therefore, SSRs can be employed where extremely tight process control is required and when durability is a necessity. The life of a heating element is increased considerably when the on/off cycle that is used to time-proportion the heater is kept at 1 or 2 seconds, or less, thus reducing the thermal expansion and contraction of element. The fast cycling SSRs ensure longer heater life at lower cost. In addition, temperature control is optimized with the faster cycling SSRs compared to electromechanical relays.

Since SSRs have no moving parts, mechanical failure is eliminated. They are resistant to shock and vibration and are durable if operated within the tolerable ambient temperatures. Heat sinks will efficiently dissipate the heat thereby increasing each unit�s life.

Relays are compact, typically measuring 58.4 (H) x 45.7 (W) x 22.9 (D) mm.

Crydom Relays

120/240 VOLT
AC OUTPUT

• Zero Voltage and Random turn-on Switching
• Panel Mount

Featuring state-of-the-art Surface Mount Technology, these SPST-NO relays delivers proven reliability in the most demanding applications. Output consists of an SCR AC switch and is available in zero-cross, random turn-on (phase controllable) and normally closed (Form B) versions with either AC or DC input (coil) control.

DC CONTROL - SCR OUTPUT
Crydom Model Number	Line Voltage Range (Vac)	Load Current Range (Arms)	Control Voltage Range (Vdc)	Control Current @ 5Vdc (mA)	Must Release Voltage (Vdc)	Surge Current 1-Cycle (Apk)
D2410	24-280	.04-10	3-32	3.4	1.0	120
D2425	24-280	.04-25	3-32	3.4	1.0	250
D2450	24-280	.04-50	3-32	3.4	1.0	625
AC CONTROL - SCR OUTPUT
Crydom Model Number	Line Voltage Range (Vac)	Load Current Range (Arms)	Control Voltage Range (Vac)	Control Current @120Vac (mA)	Must Release Voltage (Vac)	Surge Current 1-Cycle (Apk)
A2410	24-280	.04-10	90-280	2.0	10.0	120
A2425	24-280	.04-25	90-280	2.0	10.0	250
* A2450	24-280	.04-50	90-280	2.0	10.0	625
* Stocked as A2440 with same specification.

 

GENERAL SPECIFICATIONS

Operating Temperature Range:	-40� to 80� C
Isolation Voltage:	4000 Vrms
Minimum Off-State dv/dt:	500V/m sec