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• 3 Phase Under & Over Voltage and Phase Monitor Relay: PM-017 / PM-017N
is a relay designed to protect against under-voltage, over-voltage, phase sequence
errors, and phase loss in 3-phase electrical systems—3-phase 3-wire (PM-017) and
3-phase 4-wire (PM-017N).
• It is equipped with separate adjustment knobs for setting the under-voltage level
between 80% and 95% of the rated voltage, and the over-voltage level between
105% and 120% of the rated voltage.
• It checks the phase sequence of the 3-phase power system to prevent motors from
rotating in the wrong direction.
• It checks the phase sequence of the 3-phase power system to prevent motors
from rotating in the wrong direction.
• For the PM-017N model (3-phase 4-wire), if the neutral is lost,
the relay will not operate.
• LED indicator that lights up when the relay is operating.
• Suitable for protecting 3-phase system loads from damage caused by under-voltage,
over-voltage, incorrect phase sequence, and phase loss.
When the PM-017/PM-017N is connected to a 3-phase power system and the voltage is within the normal range (not exceeding the set UL or below the set LL), the phase sequence is correct (R S T), and all phases have voltage, the relay contact will operate to connect the load, with an LED indicating that the relay is active. However, if under-voltage or over-voltage occurs, the phase sequence is incorrect, or a phase is lost, the relay contact will stop operating to disconnect the circuit, and the LED will turn off, indicating that the relay has stopped, protecting the load from damage.
• 3 Phase Under & Over Voltage and Phase Monitor Relay: PM-017 / PM-017N
is a relay designed to protect against under-voltage, over-voltage, phase sequence
errors, and phase loss in 3-phase electrical systems—3-phase 3-wire (PM-017) and
3-phase 4-wire (PM-017N).
• It is equipped with separate adjustment knobs for setting the under-voltage level
between 80% and 95% of the rated voltage, and the over-voltage level between
105% and 120% of the rated voltage.
• It checks the phase sequence of the 3-phase power system to prevent motors from
rotating in the wrong direction.
• It checks the phase sequence of the 3-phase power system to prevent motors
from rotating in the wrong direction.
• For the PM-017N model (3-phase 4-wire), if the neutral is lost,
the relay will not operate.
• LED indicator that lights up when the relay is operating.
• Suitable for protecting 3-phase system loads from damage caused by under-voltage,
over-voltage, incorrect phase sequence, and phase loss.
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