SiEnDe
 

VARIABLE RESISTORS


 
 

APLICATION

These table types variable resistors are indispensable aids for varying of d.c. and a.c. currents or voltages in a wide range of electrical industry such as testings in auto-electricity, in measuring and controlling laboratories, and for demonstrations in school electrotechnical programs. The units can be applied as rheostats or potentiometers.



DESIGN

The principal part of alll variable resistor types are the pyrosta¬tic ceramic cores with resistance wire from 1 Ohm to 10 kOhm accord¬ing to Renard serie. Intermediate values can be provided by connecting the resistance coils of some of the types in parallel. Non-standard values and tolerances can be furnished on cu¬stomer's request.
The variable resistors are constructed in compliance with the standard EN 61010-1.

 


SPECIAL VERSIONS

Special versions are designed to be built-in into various electronic and control devices. These types are manufactured on customer's request.

  
 



TECHNICAL CHARACTERISTICS - STANDARD VERSIONS
 
 
 
Type Description

Resistance
(Ohm)

Nominal current (A) Scheme

Small handy version

Mass* (kg) 1,75-1,95

Dimensions (a X b X c) 246 X 93 X 150

 1
3,3
10
133
330
1000
3300		 13
7
4
2,25
0,7
0,4
0,22
Version forusual loadings.
One resistance coil in a housing.

Mass* (kg) 2,85±3,25

Dimensions (a X b X c) 446 X 93 X 150
 1
3,3
10
33
100
330
1000
3300
10000		 18
10
5,7
3,1
1,8
1,0
0,57
0,31
0,18
Version for high loadings. Two parallelly connected resisatance coils, in a housing. Sliding pieces aremechanically and electricaly connected.

Mass* (kg) 5,0: 5,8

Dimensions (a X b X c) 446 X 165 X 150
 0,5
1,6
5
16,5
50
165
500
1650
5000		 36
20
11,4
6,2
3,6
2
1,1
0,63
0,36

Version for very high loadings.
Three parallelly connected resistance in coils, a housing. Sliding pieces are mechanically and electrically connected.

Mass* (kg) 7,9±9,1

Dimensions (a X b X c) 446 X 230 X 155

 0,33
1,1
3,33
11
33
110
333
1100
3330		 54
30
17
9,3
5,4
3
1,7
0,98
0,54

Three phase version with resistance coils 3 X 320 VA. Sliding pieces are mechanically
connected.

Mass* (kg) 7,9±9,1

Dimensions (a X b X c) 446 X 230 X 155

 3 X 1
3 X 3,3
3 X
10
3 X 33
3 X 100
3 X 330
3 X 1000
3 X 3350
3 X 10000		 3X18
3X10
3X
5,7
3X 3,1
3 X 1,8
3X 1,0
3 X 0,57
3 X 0,31
3 X 0,18
 
* DEPENDING ON RESISTANCE
     
 
 


COMMON TECHNICAL DATA

  

Rated resistance
Resistance tolerance
Allowed permanent load
at 23 "C ambient
Insulation resistance
Earthing resistance
Allowed voltage at terminals
Allowed voltage between terminals
(applied to PRN3/322)
Breakdown voltage against casing
Protection degree
Construction in compliance with


ORDERING

When ordering, please state the resistor type and ohmic value, e.g.: PRN 322, 1 Ohm.
Special types will be manufactured on customer's reguest only..
 
     

Contrex d.o.o., Obrtniška 8, 1370 Logatec, Slovenija Telefon: +386 1 750 81 60, 750 81 61, Telefaks: +386 1 750 81 79
Elektronska pošta: contrex@contrex.si