· Temperature control:
PTC resistor
bi-metal thermostat (Clixon – open 250 V max. 0,5 A)
· Transformer fuse terminal:
including insert 230 V max. 6,3 A
including insert 400 V max. 10,0 A
· Top hat rail adapter (retrofitting)
Technical notes
STEZ0,5(400/230)
Determination of the current:
Iprim = SN/(Uprim x η)
Isec = SN/Usec
SN = rated transformer output
Uprim = primary voltage
Usec = secondary voltage
η = efficiency (refer to table technical data)
Iprim = 500 VA/(400 V x 0,93) = 1,34 A < 20 A
Isec = 500 VA/230 V = 2,17 A < 20 A
Number depending on the terminal points:
2 on the secondary side
4 on the primary side
Order types:
1 unit STN0,5(400/230)
Sample order:
Transformers STEZ…(400 V/200 V) with 1000 VA und with 1 additional winding on the secondary side for 100 V and 200 VA. The resulting required output is 1200 VA.
Type to be selected: STZ1,3(400/200)
To determine the price of the additional winding, the current is calculated as follows:
I = S/U
I = current
S = apparent output of the additional winding
U = voltage of the additional winding
I = 200 VA/100 V = 2 A = +ZW16
For the additional winding on the secondary side,
the correct type affix reads:
+ZW16S(100 V/200 VA)
5 additional windings on the primary and/or secondary side can be ordered. Additional windings on the primary side on request.
| Suitable for | Output range A | Type | price per unit (old) Euro | price per unit Euro |
|---|---|---|---|---|
| Screw-less terminal | ||||
| for primary currents up to 20 A or 4 mm2 | ||||
| STZ, STEZ, STENE, ET | +C4 | 1,1 | 1,10 | |
| Additional windings | ||||
| for single-phase transformers | ||||
| < 16 | +ZW16S(*V*VA) | 8,2 | 8,50 | |
| 16–25 | +ZW25S(*V*VA) | 16,3 | 16,90 | |
| 25–63 | +ZW63S(*V*VA) | 25,5 | 26,50 | |
| 63–100 | +ZW100S(*V*VA) | 45,9 | 47,70 | |
| 100–200 | +ZW200S(*V*VA) | 55,3 | 57,50 | |
| 200–320 | +ZW320S(*V*VA) | 88,9 | 92,40 | |
| 320–400 | +ZW400S(*V*VA) | 111,7 | 116,10 | |
| 400–630 | +ZW630S(*V*VA) | 134,2 | 139,40 | |
| for three-phase transformers | ||||
| < 16 | +DZW16S(*V*VA) | 12,2 | 12,70 | |
| 16–25 | +DZW25S(*V*VA) | 24,4 | 25,40 | |
| 25–63 | +DZW63S(*V*VA) | 38,5 | 40,00 | |
| 63–100 | +DZW100S(*V*VA) | 68,2 | 70,90 | |
| 100–200 | +DZW200S(*V*VA) | 84 | 87,30 | |
| 200–320 | +DZW320S(*V*VA) | 133,4 | 138,60 | |
| 320–400 | +DZW400S(*V*VA) | 166,7 | 173,20 | |
| 400–630 | +DZW630S(*V*VA) | 195,1 | 202,70 |
*) single-phase additional windings up to three-phase transfomrers DTZ, DT, DTF on request.
| optional accessory | price OLD Euro | price per unit Euro |
|---|---|---|
| Temperature control PTC resistor | 40,8 | 42,40 |
| bi-metal thermostat (Clixon - open 250 V max. 0,5 A) | 16,5 | 17,10 |
| PT100 sensor | 186,9 | 194,20 |
| including insert 230 V max. 6,3 A | 4,2 | 4,40 |
| including insert 400 V max. 10,0 A | 8,7 | 9,00 |
| Top hat rail adapter (retrofitting) | 5,1 | 5,30 |