6CRE50500 spark killer for NC mchine tools RC network

Features
 

•  Broad use in industrial applications.
•  External mounting tab.
•  1/2 watt non-inductive, high pulse resistor.
•  Three phase delta connection (3 CRE).  Three phase three line (6 CRE).
• Circuit

• 6CRE

  Electrical Specifications

  Model Number	Capacitance μF±20%	Resistance Ω±30%	Pulse condition (max.)				Peak Pulse Voltage	Test Voltage	Insulation Resistance
  			Peak to peak	Pulse width	Repetitive frequency	Pulse width (sec) x Frequency(Hz)
  CRE-10201	0.1	200(1/2W)	700V	50msec. 70msec.	360Hz.	0.45	800V max.	Line to Line 625VAC 50/60Hz 60sec Line to Case 2,000VAC 50/60Hz 60sec	Line to Line 10,000MΩ min. Line to Case 100,000MΩmin. (at 500VDC)
  CRE-20151	0.2	150(1/2W)				0.15
  CRE-30680	0.3	68(1/2W)				0.1
  CRE-50500	0.5	50(1/2W)				0.07
  3CRE-30680	0.3/1 phase	68 (1/2W) /1 phase				0.1
  3CRE-50500	0.5 /1 phase	50(1/2W) /1 phase				0.07
  6CRE-50500

   

  Recent developments in electronic equipment have shown the following trends:   Increasing demands for numerical control machines,robotics and technically advanced appliances are requiring progressive electronic technologies. When employing integrated circuit and microcomputer technology, today's equipment is requiredto perform multifunction in limited size. The de nser the installation of components, the more the components must be miniaturized and of lighter weight.   1) Using Spark Quenchers will help prevent abnormal operation due to electrical noise and/or surge pulses. It is not recommended that these devices be used in circuits with frequencies greater than 70 Hz. When used in 3-phase, full wave rectified applications, care must be taken to insure that the Spark Quencher does not self heat by more than 5 degrees centigrade or permanent damage to the Spark Quencher may occur.   2) When protecting contacts feeding small circuit loads, it is recommended that the Spark Quencher be placed in parallel with the load, rather than the contacts, for the most effective application.   3) In high speed circuits, the addition of a Spark Quencher may slow the response time of the circuit. For best response characteristics, do not use a larger Spark Quencher than is absolutely necessary to suppress the noise level.   4) Spark Quenchers should be connected as close as possible to the noise source. Excessive lead length may allow abnormal oscillation and/or decrease energy absorption capacity.   5) When a thyristor, triac or invertor circuit is to be protected by a Spark Quencher, care must be taken that high harmonic currents do not cause over heating of the Spark Quencher resistor. If heating occurs, we suggest the employment of a Spark Quencher with a lower resistance. The Spark Quencher must not self heat by more than 5 degrees centigrade. In invertor applications, it is recommended that an noise suppression capacitor be used across the power lines, instead of the Spark Quencher.   6) While it may appear effective to protect contacts with a capacitor only, the capacitor discharge current will cause accumulative damage to the contacts when they close. The proper technique is to apply a Spark Quencher across either the contacts or the load.

  Spark Quenchers have the following characteristics which make it possible to easily use them in a wide range of applications. 1) The Overload capacity is large. 2) They are not polarized; thus can be used in both AC an DC circuits. 3) They have a favorable effect on surge voltage and accompanying oscillations caused by contact chatter. 4) They are effective against spurious potentials having magnitudes below circuit voltage. 5) They offer a high degree of protection for semiconductor devices, and as thyristors and SCRs. 6) They improve the dv/dt ratio.