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> Three-phase sequence failure/loss detection relay 3PH 3
Three-phase sequence failure/loss detection relay 3PH 3
THREE-PHASE Supply Fault Detection Relay.
IMBALANCE [asymmetry between phases - user adjustable trip point]
PHASE SEQUENCE FAULTS [i.e. L1, L3, L2 phase order]
VOLTAGE DROP ON ONE OR MORE PHASES
Operating Principal: The relay is energized when the phase sequence is correct and regeneration is within limits. The relay de-energizes when an incorrect phase sequence is detected or when there is voltage drop on one or more phases. Of course, the relay also de-energizes when power is removed or all three phases fail.
Assymetry trip-point can be user adjusted using front mounted dial to register assymetry from 5% to 15% of Un [rated Voltage].
Module self powers from the 3ph supply line - three input connections only L1, L2, L3.
Dual frequency use: 50 or 60Hz.
Indication of "correct sequence and good symmetry" condition [i.e. no fault] is given via a yellow LED indicator.
http:// /catalog/syrelec/ew2.pdf
Output: DPDT = DPCO [i.e. double pole change-over relay] Relay contacts rated 8A 250vac max. [1/3HP 240Vac] Output is volt-free. i.e. output switching contacts are totally independent of voltage used to power unit. Relay output can be used to switch any supply or signal within maximum rating.
Power Requirements: Powers from sensed supply: Un=400V version [Working range: +15% or -20% of Un = 320Vac to 460Vac]
Mounting: Standard 35mm DIN-rail clip on rear.
Condition: All units are new and unused.
Multiple purchase discount [uk only and sometimes excludes very heavy items]:
Returns Policy and Safety and Legal considerations [please read before purchase]:
In the rare instances where there is a significant problem I am always more than happy to provide a full refund or replacement goods. Where the item has been lost or damaged in transit I will pursue a claim against the carrier. I may in some unusual cases ask for proof of genuine complaint or for the goods to be returned before a refund is given. Wherever a replacement is available the goods will be replaced.
