Miniature 1-phase open-core transformer TOM-150

Miniature 1-phase open-core transformer TOM-150

TOM-150-5, 5902431674087

Product description

With open core.
Transformer 150/5.
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.

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).


Buildingwith open core
Transmission lp / ls150/5
Power [VA]1,5 VA
Frequency50÷60 Hz
Maximum working voltage0,66 kV AC
Standard numberIEC 60044-1
Nominal secondary current Is5 A
Isolation breakdown voltage2 kV/1 min.
Security factorFS ≤ 2
Connection S1 / S2przewód
Working temperature-15÷45°C
Ingress Protection MarkingIP20
Wymiary: W; H; D; A; B; C; [mm]45 mm, 67 mm, 35 mm, 23 mm, 24 mm, fi 22 mm