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Protection and safety
SQZ3 phase and sequence relay

Technical features
Supply voltage [Vn] 400 V AC
Frequency [Hz] 50/60 5
Contact type [A] 1 CO, 250 V, 10 A (cosϕ=1) safety switching
Minimum voltage adjustment trimmer [%] 100 to 70 % of Vn
Intervention delay adjustment trimmer [s] 2 to 20 (only for min. voltage)
Protection degree [IP] 20
SQZ3
Operating temperature [°C] -10…+55
Power consumption [W] 1.5
Modules [n°] 3

SQZ3 phase and sequence relay
SQZ3 relay performs the following continue monitoring functions on three-phase networks
at 400 V AC:
• phase sequence
• phase failure
• minimum voltage (adjustable up to 70 % of Vn).

If one of the three failures is detected, the output relay (safety switching contact) intervenes
with a delay adjustable from 2 to 20 seconds for minimum voltage only and controls the
following:
• acoustic alarms
• motor controlling contactors
• circuit-breakers with coils.

Bbn Order details Price Weight Pack
8012542 1 1 piece unit
piece
EAN Type code Order code kg pc.
372004 SQZ3 2CSM111310R1331 0.300 1