G-U RZ 25 User Manual

12
EN
RWA compact control unit
Installation and operating instructions
RZ 25 | RZ 50 | RZ 75
12.2015 | G31553 | Designed in Germany
3.5 Calculation of cable cross-section and length
3.5.1 Calculation of cable cross-section with drives of the same type
Cable cross-section [mm²] =
Single cable length [m] =
Calculation example:
Requirement: Operation of 5 pcs. K35 in a stairwell with a single cable length of 25m
between the RWA compact control unit and drives.
Calculation: Cable cross-section [mm²] =
Cable cross-section [mm²] = = 2.72
Selected cable cross-section: 3.0 mm²
3.5.2 Calculation of cable cross-section with diff erent drives
The cable cross-section is calculated using the cable length and the sum of the breaking currents of
the drives to be connected.
Min. cable cross-section [mm²] =
Single cable length [m] x number of drives
Factor f
drive
Cable cross-section [mm²] x factor f
drive
Number of drives
Drive 300/24 S 24 L K25 K30
K35
K60
RWA1050
S80
TA60
RWA1000
RWA1100
S160 VA25
VA35
VAN OA
Factor f
Drive
73 62 56 46 40 22 80 37 51
Single cable length [m] x Number of drives
Factor f
K35
25 m x 5
46
Single cable length [m] x sum of breaking currents [A]
56
Maximum cable length (compact control unit – drive)
Cable cross-
section
Sum of breaking currents
1 A 2 A 3 A 3.2 A 4 A 5 A 6 A 6.5 A 7 A 8 A 8.4 A
3x 1 mm² 56 m 28 m 18 m 17 m 14 m 11 m 9 m 8 m 8 m 7 m 6 m
3x 1.5 mm² 84 m 42 m 28 m 26 m 21 m 16 m 14 m 12 m 12 m 10 m 10 m
3x 2.5 mm² 140 m 70 m 46 m 43 m 35 m 28 m 23 m 21 m 20 m 17 m 16 m
3x 3.0 mm² 168 m 84 m 56 m 52 m 42 m 33 m 27 m 25 m 24 m 21 m 20 m
5x 2.5 mm² * 280 m 140 m 93 m 87 m 70 m 56 m 45 m 43 m 40 m 35 m 33 m
* Doubling of the live cores (produces a cable cross-section of 5.0 mm² each)

G-U RZ 25 Specifications

General

Brand	G-U
Model	RZ 25
Category	Control Unit
Language	English