Datasheet

33
DIMENSIONS ST RELAY (mm)
WIRING DIAGRAM (mm)
ST
ST-D
Phase imbalance
or phase loss
Phase sequence
Overtemperature
MODELS
ST2 ST4 ST2-D ST4-D
Nominal voltage of the line to
be monitored (±15%)
3 x 230 V 3 x 400 V 3 x 230 V 3 x 400 V
Voltage supply (±15%) Self-powered (3-phase)
Code
12001 12012 12002 12013
CHARACTERISTICS
Nominal frequency 50/60 Hz
Control range
Phase loss: with resistive loads it trips when a phase loss occurs.
With three-phase motors it trips if the voltage regenerated by the
motor is lower than 60% of the main voltage. Phase imbalance >
40%
PTC sensor: min/max cold resist
- Trip resist
100Ω / 1500Ω - 2300Ω
Trip time delay < 0,1 s
Reset mode Automatic
Signalling LED’s
3 LED’s: ON +
+
Output contacts 1 relay with 1 change over NO - NC
2 relays ( + ) with 1 NO
Switching power I
th
: 5A; AC15 - 250V - 2A; DC13 - 30V - 2A
Maximum terminal section /
screw torque
2,5 mm
2
, No. 22 - 12AWG / 20Ncm, 1.8 LB - IN
Power consumption 7,5 VA (230 Vac) - 11 VA (400 Vac)
Protection degree / weight IP20 / 0,12 kg IP20 / 0,13 kg
Storage / operation
temperature
-30°C +70°C / -15°C +60°C
22,5 72,6
100
22,4
61,5
80
WORK LOGIC
Tripped
or Us=0
Normal
RST RST RSTRS
T
RTS
RELAY
PTC
RELAYS
11-14
21-24
PTC
Tripped
or Us=0
Normal
ST-DST
ST
• Self-powered by the voltage to be monitored.
• Visual indication of trip cause.
• DIN rail mounting.
• To protect 3-phase devices
• Suitable for motors with built-in PTC sensors in applications
such as elevators, cranes, hoists and similar installations.
• Sensitive to incorrect phase sequence.
• Monitoring of short circuit and broken wire in PTC circuit.
ST-D model:
Two output relays, one for phase imbalance, phase loss and
phase sequence and the other for over temperature.
PHASE AND TEMPERATURE CONTROL
ST-D
Tripped
or V=0
14 11 12
14 11 12
Normal
T-L3
S-L2
R-L1
K1
A1
A2
N
M
3
T-L3
S-L2
R-L1
K1
M
3
PHASE and TEMPERATURE relays
CONTROL & MEASUREMENT
PROTECTION
FUNCTIONS
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10/2010/D00