Factory Automation Highly Extendable Spring Cable, CVF-U Series

Brand :

KURAMO ELECTRIC

Caution

[End of standard certification applicability] For this product, the TR-CU (Customs Union Technical Regulations), for which we had previously obtained certification, has become difficult to renew due to recent international circumstances. Although "EAC" is indicated in the manufacturer catalog, it is not applicable. Thank you for your understanding.

Product Description

[Features]
Coiled cord with excellent flexibility.
· Elasticity / The sheath uses urethane with excellent rebound resilience and low permanent compression set.
· Flex-resistant / The coiled cable offers excellent flexibility and withstands one million cycles of double-length extension.
· Environmental resistance / Excellent abrasion resistance and oil resistance allow for long-term use even under harsh usage conditions.
· When extended, the cable reaches approximately three times the specified length.
[Applications]
·Wiring for telescoping and rotating parts of industrial robots (for control).
·Wiring for telescoping and rotating parts of NC machines, etc. (for control).

Product Feature Details

Structural Overview

Conductor	Annealed copper composite stranded wire
Insulator	Vinyl mixture
Twisted	Stranded wire cores in a round shape
Tape	Wound with multiple layers of tape
Sheath	Lubricating urethane resin (black)

Operating temperature range

During operation: 0 to 60°C

Technical Information & Design Ideas

Technical Data

Cable type	Japan
Compatible size	- ^*
Rated voltage	-
Rated temperature	60°C
Test voltage	0.3, 0.5 mm²: 1,000 V AC, 1 min 0.75 to 2 mm²: 3,000 V AC, 1 min
Flame retardancy	60° incline
Compatible standards	- ^*

* The Electrical Appliances and Materials Safety Act of Japan does not apply to CVF-U, so please use it for low current circuits such as signal and communication circuits.

Specifications Table

Conductor		Insulation	Number of cores	Sheath outer diameter (approx. mm)	Specifications of spring
Nominal cross-sectional area	Outer diameter (approx. mm)	Outer diameter (approx. mm)	Number of cores	Sheath outer diameter (approx. mm)	Outer diameter of spring (approx. mm)	Approximate weight per 1 m of spring (g)
0.3 mm²	0.9 <3/20/0.08>	1.5	2	4.9	18	180
			3	5.1	19	240
			4	5.5	20	290
			6	6.6	25	410
			8	7.7	29	550
			10	9.1	34	720
			12	8.5	32	740
			16	9.6	36	970
0.5 mm²	1.2 <3/15/0.12>	2.0	2	5.9	22	290
			3	6.2	23	360
			4	6.9	26	460
			6	8.3	31	650
			8	9.7	36	880
			10	11.7	43	1,180
			12	11.0	41	1,220
			16	12.5	46	1,590
0.75 mm²	1.4 <3/22/0.12>	2.6	2	7.3	27	460
			3	7.9	29	590
			4	8.6	32	820
			6	10.5	39	1,080
			8	13.3	49	1,660
			10	14.5	54	1,950
			12	14.9	55	2,200
			16	16.5	61	2,720
1.25 mm²	1.7 <7/16/0.12>	2.9	2	8.1	30	600
			3	8.5	32	750
			4	9.5	35	970
			6	11.6	43	1,460
			8	14.6	54	2,160
			10	15.9	59	2,520
2 mm²	2.1 <7/25/0.12>	3.3	2	9.1	34	810
			3	9.6	36	1,020
			4	10.7	40	1,310

Product Properties

Electrical Characteristics

Conductor	Number of cores	Electrical Characteristics
Nominal cross-sectional area	Number of cores	Allowable current (A)	Conductor resistance 20°C (Ω/km)	Insulation Resistance 20°C (MΩ/km)
0.3 mm²	2	2	62.3 or less	5 or more
	3	2
	4	2
	6	2
	8	1
	10	1
	12	1
	16	1
0.5 mm²	2	3	37.8 or less	5 or more
	3	3
	4	3
	6	2
	8	2
	10	2
	12	2
	16	2
0.75 mm²	2	4	25.1 or less	5 or more
	3	4
	4	4
	6	3
	8	3
	10	3
	12	2
	16	2
1.25 mm²	2	7	15.1 or less	5 or more
	3	7
	4	7
	6	4
	8	4
	10	3
2 mm²	2	10	9.79 or less	5 or more
	3	10
	4	10

About allowable current

The allowable current values are calculated values at an ambient temperature of 30°C when the cable is installed in a single line in the air, and are not guaranteed values.
If the ambient temperature is 30°C or higher, multiply the allowable current value by the current reduction factor in the table below.
The allowable current value is a value calculated according to JCS0168 and is not a guaranteed value.

JCS0168: The Japanese Electric Wire & Cable Makers' Association standard "Calculation of allowable current for power cable of 33 kV or less"

■ Current Reduction Factor

Ambient temperature (°C)	30	35	40	45	50	55
Current Reduction Factor	1.00	0.91	0.82	0.71	0.58	0.41

Wire Core Identification

Structure

■Example: 6-core cable

Structural drawing of Factory Automation, Highly Extendable Spring Cable, CVF-U Series

Sheath outer diameter (d): As per the specifications table.
Outer diameter of spring (D): The standard diameter is shown in the specifications table (approx. 3.7 times the cable outer diameter).
Spring length (L): Standard lengths are 30, 50, 100, 150, and 200 cm.
Terminal length (l1/l2): The standard length is 30 cm.
Spring expansion/contraction: Please use the standard spring outer diameter with expansion and contraction within 3 times the length of the spring.