1PH OR 3PH VOLTAGE MONITORING RELAY

Brand: Samwha

DESCRIPTION

1ph or 3ph Voltage Monitoring relay
Installation: 8 Pin Socket
Model: DSP-DVR, DVR-M

Operation based on the direct line voltage detection
• Protection: Over/Under voltage, Phase Loss, Reverse Phase, Current Unbalance
• Indication : Voltage [Line/Average], Frequency
• Time-Voltage operational characteristic → Define / Inverse

Rated Line Voltage → 100 ~ 500VAC
Over/Under Voltage protection within (+), (-) 20% to line voltage
Possible to preset operation time for over/under voltage each, respectively.

Perfect check for initial line state
a)”dt” (trip delay time) mode is preset “OFF”
• Preset “a” in “out” mode:
Main trip output(95-98) is energized (Open → Close) in case the rated line voltage with normal forward phase state is sensed initially
• Main trip output(95-98) is trip as showing a trip cause if the initial line state is under over/under voltage, reverse phase, voltage unbalance
• v.OFF is shown in case the line voltage is not sensed initially or voltage is dropped to zero(0) while the normal operation is doing
• Preset “b” in “out” mode:
Main trip output(95-98) is not energized (Open→ Open) in case the rated line voltage with normal forward phase state is sensed initially

b)”dt” (trip delay time) mode is preset a value(time)
• Preset “a” in “out” mode: Main trip output(95-98) is energized (Open→ Close) after “dt” is elapsed in case the rated line voltage with normal forward phase state is sensed initially
• Main trip output(95-98) is still opened(not trip) even after “at” is elapsed if the initial state is under phase loss, also “PL’ is shown
• “rp” is shown as main trip output(97-98) is still opened(not trip) after operational trip time(0.5sec) without concerning with “dt” if reverse state is sensed initially
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