Brief introduction about ZS3-VA adjustable voltage and current dual display Electronic relay Self resetting overvoltage and undervoltage protector:
When the voltage return to normal after 30 seconds the power supply automatically connects.
working principle:
Voltage monitoring: The self resetting overvoltage and undervoltage protector monitors changes in the supply voltage in real time through a voltage monitoring circuit.
Comparison and triggering: When the supply voltage exceeds or falls below the set threshold, the voltage monitoring circuit sends a signal to the comparator, which compares with the set threshold and triggers the trigger.
Protective action: The output signal of the trigger will trigger the circuit breaker, cutting off the circuit to protect electrical equipment from the effects of high or low voltage.
Automatic reset: When the voltage returns to the normal range, the protector will automatically restore power supply and reconnect the circuit.
Application areas:
Power system: widely used in power systems, industrial equipment, and residential electrical distribution systems.
Home and shopping mall power distribution: suitable for single-phase AC230V and three-phase four wire AC415V distribution lines, used for overvoltage, undervoltage, phase failure, and zero line protection.
Technical parameters:
Working voltage: AC220V， Frequency 50Hz.
Product specifications: 20A, 32A, 40A, 50A, 60A (resistive).
Load power: 4.4KVA, 6.6KVA, 8.8KVA, 11KVA, 13.2KVA.
Overvoltage action cut-off value: AC270 ± 5V.
Overvoltage recovery value: AC255 ± 5V.
Undervoltage action cut-off value: AC170 ± 5V.
Undervoltage recovery value: AC185 ± 5V.
Power outage delivery delay: 30 ± 10 seconds.
Action delay time: ≤ 1 second.
Self power consumption: ≤ 2W.
Electrical and mechanical lifespan: ≥ 100000 cycles.
Dimensions: 85.5 × 45 × 66mm (length × width × height).
Functional features:
Automatic reset: The protector automatically restores power supply after the voltage returns to normal, without the need for manual intervention.
High reliability: simple structure, easy operation, rapid response, high reliability.
Widely applicable: Suitable for various power equipment such as motors, transformers, generators, etc., to protect them from the effects of high or low voltage.
