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3-Phase Monitor -- Model 257B-400 Protective Relays and Monitoring Relays Data Sheets Time Mark Corporation


Available from: Time Mark Corporation
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3-Phase Monitor -- Model 257B-400
SPECIFICATIONS View Entire Datasheet
Voltage Sensitive Relay Undervoltage
Power (Phase) Sensing Phase Failure (Loss); Reversal
Protective Functions Synchronous Check (Paralleling)
Voltage Sensing Range (volts) 160 to 240
Frequency Sensing Range (Hz) ? to 400
Notes SPDT, 8-pin socket mounting, high humidity tolerance
Abstract The Model 257 continuously monitors 3-phase power lines for abnormal conditions. When properly SPECIFICATIONS adjusted, the Model 257 monitor will detect phase
View Entire Datasheet

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3-Phase Monitor -- Model 2581-480
3-Phase Monitor -- Model 258B
3-Phase Monitor -- Model 258B-400
3-Phase Monitor -- Model 258BM
3-Phase Monitor -- Model 258BM-400
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