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Protective Control Circuit Transformers PZ Series for Bulgarian Electric Hoists
The protective step-down transformers of the PZ (TZE) series are designed to provide a safe power supply to the control circuits of lifting equipment. They are installed in the control panels of electric hoists, stepping down the mains voltage (380V) to safe extra-low voltage values (42V, 36V, or 24V), which are then supplied to the operator's pendant control station.
Our catalog features original transformers for hoists of any lifting capacity — from light duty to heavy industrial equipment. All models provide reliable galvanic isolation and withstand the high inrush currents of contactor coils.
Model Comparison Table
| Model | Nominal Power (S), VA | Primary Voltage (U1), V | Secondary Voltage (U2), V | Recommended Application (Approximate) |
|---|---|---|---|---|
| ПЗ-40 (PZ-40) | 40 | 380 / 400 | 42 / 36 / 24 | Hoists capacity 0.5 – 1.0 t (single-speed) |
| ПЗ-45 (PZ-45) | 45 | 380 / 400 | 42 / 36 / 24 | Hoists capacity 1.0 – 2.0 t |
| ПЗ-125 (PZ-125) | 125 | 380 / 400 | 42 / 36 / 24 | Hoists capacity 3.2 – 5.0 t (with micro-drives) |
| PZ-250 (TZE 1DF 250) | 250 | 380 / 400 | 42 / 36 / 24 | Heavy hoists capacity 5.0 – 10.0 t and above |
| ПЗ-300 (PZ-300) | 300 | 380 / 400 | 42 / 36 / 24 | Crane systems, multi-motor circuits |
* Note: The secondary voltage depends on the specific modification (marking) of the transformer. Before placing an order, we strongly recommend verifying the operating voltage of your equipment's contactor coils.