Seneca S91 Quick Start Manual

Highlights

• Front diagnostics via LED and
display
• Simplified settings and
adjustments via trimmer and
front selector
• Current measurement up to
16 A directly or by Current
Transformer
• Maximum rated voltage 660
Vac (F-F)
• Motor control input 195 ÷ 255
Vac (S91); 400 Vac ± 10 %
(S91-400)SPDT Relay @ 250
Vac - 8 A
• Alarm, temperature, power
factor, maximum current,
minimum voltage or phase
failure management
100% Made & Designed in Italy
S91 / S91-400
MOTOR MULTI-PROTECTION
S91 and S91-400 are protection devices for electric motors that allows
the detection of wrong phase sequence or lack of a phase, of the
excess current consumption, no-load operation with the power factor
measurement.
Equipped with rotary programming switches and a display of alarm
signaling, the device is characterized by an input for PTC to protect
the motor from overtemperature and enable input for starting the
engine. S91 operates in 3 operation modes: single-phase or three-
phase, maximum current range 5 or 16 A, operation with or without
PTC. Main applications are protection of single-phase or three-phase
pumps for possible rotor stop and for overtemperature as well as device
failure detection of mechanical transmission (e.g. belts or chains) with
protection against transmission system lockdown.
In case the neutral is not available, S91-400 version (with rated voltages
up to 400 Vac) allows the device to be powered directly on the phases,
without having to insert a reducing transformer.
5 - 16 A
PTC Input Max current
range
w w w . s e n e c a . i t
RELAY
Three-phase /
Single-phase
measurement