4210-3-SD001B : Power Supply – 3 Phase, 500VA, 415 / (41.5/24)Vac

Price: $946 + Freight & handling + GST

This is the same product as 4210-3-R001A but with the output 10A. 3 pole, circuit breaker and 4mm terminals (3ph+N) fitted into the enclosure

Safety,  Earth Screened, Double Wound, Isolating Transformer Manufactured to AS/NZS 51558

Rating: 500VA
Input: 415 Vac, 3 phase, 3 wire (3ph+E), Delta(Δ) connected
Output: 41.4/24.0 Vac, 3 phase, 4 wire (3ph+N), Star(Y) connected

Important:
These transformers are wound with three 415Vac Primary winding connected in Delta(Δ) and their associated three Secondary 24Vac winding connected in Star(Y), i.e. Delta/Star(ΔY) configuration
RECOMMENDED

The 240 Vac Star/24 Vac Star. i.e.Star/Star (YY) configuration is NOT recommended. This will produce internal harmonics and unbalanced secondary output voltages under load.  This in turn will produce non-repeatable student test readings and results

The transformer is supplied in a sheet-metal, powder coated, enclosure (250 x 200 x 200)

Input is to be hard wired to internal primary terminals

The unit comes supplied with the output 10A, 3 pole, circuit breaker and four 4mm diam binding posts (3ph+N) fitted into the metal enclosure

To limit the voltage drop (under load) it is recommended to install one(1) only 500VA transformer per work station

The use of one large VA master transformer to supply a number of work stations is not recommended

With the secondary extra-low-voltage output and relatively high and constantly varying load currents (V=I²R volt drop) it will be found that the terminal voltage at each work station will be constantly varying (caused by the variations at the other work stations) making it extremely difficult for students to obtain sensible and repeatable , meter readings and test results

For optimum operational performance at minimal “voltage-drop” under-load the Secondary ELV (41.5V) the following minimal output cable sizes are recommended:

Maximum cable run between transformer and Load

Up to 6m  use 2.5mm²

between 6m and 10m use 4mm²

between 10m and 14m use 6mm²

between 14m and 25m use 10mm²