Miniature 1-phase open-core transformer TOM-250

Miniature 1-phase open-core transformer TOM-250

TOM-250-5, 5902431674100

Product description

Single-phase.
With open core.
Transformer 250/5.
Power 1.5 VA.

The current transformer is used to proportionally change large current intensities to lower values, adapted to the measuring ranges of control and measuring devices.

The conductor with the measured current passes through the main bore of the transformer (P1/P2).This is equivalent to one winding of the primary winding. The terminals of the secondary winding S1 and S2 are connected to the terminals of the measuring circuit of the control or measuring device.
The ratio of the currents in the two windings is a constant quantity.
This is the current ratio IPn/ISn=N, where
IPn - rated primary current;
ISn - rated secondary current;
N - gear ratio value.
From the value of the current flowing through the secondary winding, the value of the current flowing through the primary winding can be determined:
ISm*N=IPm, where
ISm - measured primary current;
IPm - measured secondary current.


NOTE
Recommended connection of the secondary system with a wire of not less than 2.5 mm² in diameter.
Recommended earthing of terminal S2.
It is forbidden to disconnect the secondary circuit during the operation of the transformer (possibility of high voltage resulting in shock to persons or damage to the equipment).

 

Type single-phase
Building with open core
Transmission lp / ls 250/5
Class 1
Power [VA] 1,5 VA
Frequency 50÷60 Hz
Maximum working voltage 0,66 kV AC
Standard number IEC 60044-1
Nominal secondary current Is 5 A
Isolation breakdown voltage 2 kV/1 min.
Security factor FS ≤ 2
Connection S1 / S2 przewód
Working temperature -15÷45°C
Assembly szyna/przewód
Ingress Protection Marking IP20
Wymiary: W; H; D; A; B; C; [mm] 45 mm, 67 mm, 35 mm, 23 mm, 24 mm, fi 22 mm